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Pengaruh Dimensi Tiang Mini Dan Faktor Aman Terhadap Lendutan Pelat Terpaku Tiang Tunggal Oktavia, Ferly; Puri, Anas; Mildawati, Roza
JURNAL SAINTIS Vol 18 No 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/saintis.2018.vol18(2).3188

[ID] Perkerasan Sistem Pelat Terpaku merupakan pengembangan Sistem Cakar Ayam yang berfungsi sebagai salah satu alternatif solusi untuk mengatasi permasalahan konstruksi jalan pada tanah lunak. Selain itu, kenaikan kapasitas dukung tanah dasar akibat pengaruh dukungan tiang-tiang pada pelat akan mengurangi kebutuhan tebal perkerasan beton dan memperkaku sistem perkerasan. Penelitian ini bertujuan untuk mempelajari pengaruh diameter tiang masif dan faktor aman terhadap lendutan pelat terpaku tiang tunggal. Dimensi struktur pelat terpaku dan data material mengacu pada Puri (2017). Sistem ini dibebani dengan pembebanan tekan sentris. Perhitungan lendutan dan gaya dalam pelat menggunakan metode BoEF, berdasarkan tambahan modulus reaksi tanah dasar ekivalen yang dibandingkan dengan lendutan hasil pengamatan. Hasil analisis menunjukkan bahwa besaran faktor aman mempengaruhi nilai lendutan hitungan. Lendutan hitungan meningkat dengan peningkatan faktor aman. Penggunaan faktor aman 1,0 memiliki pola lendutan mendekati lendutan pengamatan untuk tiang bulat. Analisis perhitungan lendutan dengan ukuran mini pile  yang semakin besar menghasilkan lendutan pelat yang semakin kecil. Variasi SF tidak berpengaruh signifikan terhadap momen pelat. [EN] The Nailed-Slab Pavement System is the development from the pavement of the Cakar Ayam System which as an alternative solution to solve the problem of road construction in soft soil. In addition, the increase in bearing capacity of the subgrade due to the influence of the poles support on the plate will reduce the need for thick concrete pavement and strengthen the pavement system. This study aims to learn the effect of massive pole diameter and safe factors on the deflection of single-pile Nailed Slab. The dimensions of the Nailed-slab structure and material refer to Puri (2017). This system is burdened with press centric loading. Calculation of deflection and force in plates uses the BoEF method, based on the additional modulus of the subgrade equivalent reaction which is compared to the deflection observed. The results of the analysis show that the magnitude of the safe factor affects the value of the deflection calcutation. This deflection  increases with an increase in safe factors. The use of the safe factor 1.0 has a deflection pattern that is closer to the observation deflection for the round pile. Analysis of the deflection calculation with the size of the mini pile which gets bigger results in a smaller slab deflection. SF variations have no significant effect on the plate moment.

Analisa Penggunaan Sumber Daya Manusia Dengan Metode Resource Leveling Pada Pelaksanaan Proyek Konstruksi (Studi Kasus : Proyek Pembangunan Ruang Kelas Baru Ponpes Daarun Nahdah Thawalib Bangkinang) Retno, Deddy Purnomo; Astuti, Astuti; Tamimi, Zulfadli
JURNAL SAINTIS Vol 18 No 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/saintis.2018.vol18(1).3194

[ID] Tenaga kerja merupakan salah satu sumber daya manusia yang penting, karena seringkali penyediaannya terbatas, baik karena faktor kualitas maupun hal-hal lain. Kemudian kelebihan tenaga keja akan mengakibatkan pemborosan biaya serta kekurangan tenaga kerja akan mengakibatkan keterlambatan pelaksanaan proyek yang telah dijadwalkan. Tujuan tugas akhir ini adalah untuk menentukan sumber daya manusia yang efektif dalam pelaksanaan proyek Pembangunan Ruang Kelas Baru Ponpes Daarun Nahdah Thawalib Bangkinang, dan untuk mengetahui berapa banyak biaya yang diperlukan untuk kebutuhan penggunaan sumber daya manusia. Metode Perataan Sumber Daya (Resource Leveling) dapat digunakan untuk mendapatkan histogram penggunaan tenaga kerja yang efektif dalam pelaksanaan proyek konstruksi sehingga tidak terjadi penurunan dan peningkatan penggunaan tenaga kerja diawal, ditengah dan diakhir jadwal pelaksanaan pekerjaan. Proses Resource Leveling dilakukan menggunakan bantuan aplikasi Microsoft Project 2013. Dari hasil penelitian diperoleh penggunaan tenaga kerja rencana dan tenaga keja setelah perataan (leveling) yaitu sebanyak 790 orang dengan biaya sebesar Rp. 375.270.000,00 yang terdiri dari 470 orang pekerja dengan biaya sebesar Rp. 207.270.000,00 dan 320 orang tukang dengan biaya sebesar Rp. 168.000.000,00. Sedangkan tenaga kerja realisasi atau lapangan sebanyak 831 orang dengan biaya sebesar Rp. 382.011.000,00 yang terdiri dari 646 orang pekerja dengan biaya sebesar Rp. 284.886.000,00  dan 185 orang tukang dengan biaya sebesar Rp. 97.125.000,00. Dengan demikian tenaga kerja rencana dan setelah perataan lebih hemat biaya sebesar Rp. 6.741.000,00 dibandingkan tenaga kerja realisasi. [EN] Labor is one of the most important human resources, because it is often limited in provision, both because of the quality factor and other things. Then the excess work force will lead to waste of costs and labor shortages will result in delays in the implementation of projects that have been scheduled. The purpose of this thesis is to determine the effective human resources in the implementation of the New Classroom Building Project Ponpes Daarun Nahdah Thawalib Bangkinang, and to find out how much cost is needed for the needs of human resource use. Resource Leveling Methods can be used to obtain an effective employment histogram in the implementation of a construction project so that there is no decrease and increased use of labor at the beginning, middle and end of the job execution schedule. The Resource Leveling process is done using Microsoft Project 2013 help. From the result of the research, it is found that the use of workforce of plan and work force after leveling is 790 people with the cost of Rp. 375,270,000.00, consisting of 470 workers at a cost of Rp. 207.270.000,00 and 320 craftsmen at a cost of Rp. 168,000,000.00. While the labor realization or field as many as 831 people with a fee of Rp. 382.011.000,00 consisting of 646 workers with a fee of Rp. 284,886,000,00 and 185 carpenters at a cost of Rp. 97.125.000,00. Thus the workforce of the plan and after smoothing is more cost effective at Rp. 6,741,000.00 compared to realization workforce.

Tinjauan Kapasitas Dukung Pondasi Bored Pile Menggunakan Formula Statis Dan Elemen Hingga 2D Pada Gedung E Fakultas Teknik Universitas Islam Riau Pratama, Ramanda; Puri, Anas; Dewi, Sri Hartati
JURNAL SAINTIS Vol 18 No 2 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/saintis.2018.vol18(2).3189

[ID] Pondasi sebagai dasar bangunan harus mampu memikul seluruh beban bangunan dan beban lainnya, untuk diteruskan sampai kelapisan tanah atau batuan dibawahnya. Pemilihan jenis pondasi salah satunya disebabkan oleh jenis tanah dan jenis struktur atasnya, apakah termasuk konstruksi beban ringan atau beban berat, maka dari itu diperlukan stabilitas tanah itu sendiri agar mempunyai kapasitas dukung yang kuat. Tujuan dari penelitian ini menghitung kapasitas dukung aksial, kapasitas dukung lateral, penurunan, defleksi pondasi bored pile menggunakan metode statis dan elemen hingga 2D, menghitung tegangan geser efektif tanah dengan metode elemen hingga 2D yang kemudian membandingkan dengan beban bekerja dan syarat yang diizinkan. Dalam menganalisa beban bekerja pada bangunan dihitung menggunakan bantuan software Etabs v.9. Analisa kapasitas dukung pondasi bored pile tunggal menggunakan metode Aoki & Alancer, Schmertmaan & Nottingham, Begemaan, dan untuk menghitung kapasitas dukung pondasi bored pile (group) digunakan efisiensi kelompok tiang, sedangkan kapasitas lateral dan defleksi digunakan metode Broms dan penurunan pondasi bored pile tunggal menggunakan metode Dee Beer & Marten, untuk kelompok tiang menggunakan metode Vesic dan tegangan geser efektif tanah. Dan akan dilakukan analisa menggunakan elemen hingga 2D dengan bantuan software Plaxis 2D v.8.2. Dari hasil perhitungan dan persentase nilai terbesar kapasitas dukung (Qgall) pondasi bored pilegroup As I-39 dan As C-26 pada titik S-1 dengan metode Schmertmaan & Nottingham sebesar 128%, metode Begemaan sebesar 139% dan elemen hingga 2D sebesar 169% dan dinyatakan pondasi aman terhadap beban yang bekerja pada pile cap, sedangkan metode Aoki & Alancer sebesar 39%, dinyatakan tidak aman terhadap beban yang bekerja pada pile cap. Dan kapasitas beban lateralmetode Broms mampu memikul sebesar 167% dan elemen hingga 2D sebesar 105% dan dinyatakan aman terhadap beban horizontal yang bekerja. Sedang defleksi pondasi bored pile  metode Broms sebesar 2,39 mm, elemen hingga 2D sebesar 3,46 mm, dan penurunan pondasi tunggal dengan metode Dee Beer & Marten sebesar 9,78 mm, elemen hingga 2D sebesar 36,40 mm dan pondasi bored pile group metode Vesic sebesar 21,87 mm dan elemen hingga 2D sebesar 16,78 mm, dapat dinyatakan defleksi dan penurunan memenuhi syarat yang diizinkan, dan tegangan geser efektif tanah tunggal tanpa interface dan dengan interface tidak memenuhi syarat yang diizinkan. [EN] Foundation, as the building basic must be able to carry the whole building load and other loads to be forwarded to the soil or rock layers underneath. Selection of the foundation type one caused by the type of soil and the type of structure above, whether included construction of a light load or a heavy load, therefore it needed the stability of the land itself in order to have a strong bearing capacity. The purpose of this studies are to calculate the axial bearing capacity, lateral bearing capacity, decreasing, and bored pile foundation deflection using static and 2D finite element method, and calculate effective shear stress of soil with 2D finite element method, then compare with the workload and terms are allowed. In analyzing the workload on buildings, the calculation using ETABS software v.9. Analysis of bearing capacity of single bored pile foundation use Aoki & Alancer, Schmertmaan & Nottingham, Begemaan method, and to calculate the bearing capacity of bored pile foundation (group) used the pile groups efficiency, while lateral capacity and deflection used Broms method and reduction single bored pile foundation used Dee Beer & Marten method, for pile group using Vesic method and effective shear stress of soil. And will be analyzed using 2D finite element with Plaxis 2D software v.8.2. From the calculation and the percentage of the bearing capacity greatest value (Qgall), bored pile group foundation As I-39 and As C-26 at S-1 point with Schmertmaan & Nottingham method amounted to 128%, Begemaan method amounted to 139% and the 2D finite element amounted to 169 % and foundation declared safe to the load on the pile cap, whereas Aoki and Alancer method amounted to 39%, declared unsafe to load on the pile cap. And the lateral load capacity Broms method capable of assuming at 167% and the 2D finite element about 105% and declared safe to horizontal workload. Bored pile foundation deflection with Broms method amounted to 2.39 mm, 2D finite element amounted to 3.46 mm, and a decrease in single foundation with Dee Beer & Marten method amounted to 9.78 mm, 2D finite element amounted to 36.40 mm and bored pile group foundation Vesic method amounted to 21.87 mm and 2D finite element amounted to 16.78 mm, it can be stated that deflection and decrease are eligible permitted, and effective shear stress of single soil with and without interface are ineligible permitted.

EVALUASI ANALISA TARIF BIAYA ANGKUTAN UMUM KOTA PEKANBARU (STUDI KASUS : BUS WAY TRAYEK RAMAYANA – PANDAU PERMAI) Azriadi, Riza; Zaini, Abdul Kudus; Astuti, Astuti
JURNAL SAINTIS Vol 15 No 1 (2015)
Publisher : UIR Press

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[ID] Untuk memenuhi kebutuhan angkutan umum kota Pekanbaru, pemerintah kota menyediakan Trans Metro Pekanbaru bus yang memiliki sembilan koridor. Trans Metro Pekanbaru diharapkan dapat memenuhi kebutuhan mobilitas tinggi. Namun kenyataan di lapangan, bus Trans Metro Pekanbaru tidak optimal dalam melakukan perannya sebagai sarana yang layak untuk mengangkut mereka pekanbaru masyarakat. Penelitian ini dimaksudkan untuk mengnalisa biaya operasional busway dari angkutan umum (metro pekanbaru trans), biaya meminimalkan dan tingkat yang lebih rendah dari yang efisien dan memprioritaskan keselamatan. Metode Evaluasi Analisis Biaya Transportasi Umum Tarif Pekanbaru (Bus Way Route Ramayana - PandauPermai) didukung oleh studi pustaka dan data primer dan data sekunder. Trans Metro Pekanbaru di koridor 1 (Ramayana - PandauPermai) pada jenis penelitian yang digunakan kendaraan Mitsubishi, tahun pembuatan 2008, jumlah armada yang beroperasi di hamparan Ramayana - pemandangan Pandau saat ini berjumlah 13 armada. Analisis menunjukkan tingkat saat sejalan dalam hal biaya operasional kendaraan. Tarif dari hasil analisis yang diperoleh Rp. 2000, - Sedangkan tarif yang diberlakukan oleh perusahaan manajemen sebesar Rp. 3000, -. Jadi, dengan tingkat saat ini dapat disimpulkan bahwa manajemen perusahaan untuk mendapatkan keuntungan transportasi bus umum. Transporttation Bus cara yang berbeda dari transportasi umum lainnya. Dengan tingkat yang sama Rp. 3000, - cara transportasi umum penumpang bus bisa transit dari satu koridor lain untuk koridor lain. [EN] To meet the needs of the public transportation Pekanbaru city, the city government to provide Bus Trans Metro Pekanbaru which has nine corridors. Trans Metro Pekanbaru is expected to meet the needs of high mobility. But the reality in the field, Bus Trans Metro Pekanbaru is not optimal in performing its role as a viable means of transportation to their community pekanbaru. This study is intended to mengnalisa operational costs of public transport bus way (trans metro pekanbaru), minimizing costs and lower rates efficient and prioritizing safety. Evaluation Research Methods Analysis of Public Transport Cost Rates Pekanbaru (Bus Way Route Ramayana - PandauPermai) is supported by the study of literature and primary data and secondary data. Trans Metro Pekanbaru in the corridor 1 (Ramayana – PandauPermai) on the study type used vehicles are Mitsubishi, year of manufacture 2008, the total fleet operating in the stretch Ramayana - Pandau scenic currently number 13 fleet.The result of analysis shows the current rate is in line in terms of vehicle operating costs. Rates of analysis results obtained Rp. 2,000, - While the tariffs applied by the management company of Rp. 3000, -. So, with the current rate can be concluded that the freight management company gets public buses profit. Transporttation buses way different from other public transportation. With the same rate of Rp. 3000, - general transportation buses way passengers can transit from one another corridor to corridor other.

Perbandingan Kuat Tekan Dan Kuat Lentur Beton Mutu Tinggi Dengan Menggunakan Berbagai Merk Semen Di Kota Pekanbaru Mildawati, Roza
JURNAL SAINTIS Vol 18 No 1 (2018)
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/saintis.2018.vol18(1).3195

[ID] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand. [EN] Concrete is a very popular building material used in the world of construction services, consisting of a mixture of Portland Cement (PC) or other hydraulic cement, fine aggregates, coarse aggregates and water, with or without using additional materials. The quality of materials such as cement also greatly affects the strength of the concrete after hardening, so the selection of cement quality must be in accordance with the concrete planning regulations in order to obtain optimal results. In Indonesia there are many new cement factories that produce to meet the needs of the community, one of which is the Conch brand cement. So in connection with the above, Conch cement can be examined to compare the value of compressive strength and flexural strength with old cement, namely cement Padang, Tiga Roda, Holcim and Bosowa which are generally always used in concrete planning at this time.The purpose of this study was to determine the comparison of compressive strength and flexural strength of the concrete and the multiplier between cement Padang, Three Wheels and Conch at 28 days of age. In this study using the method SNI 03-2834-2000. With cylindrical test specimens (150 mm x 300 mm) and size beams (150 mm x 150 mm x 600 mm) three specimens were made for each cement.The maximum concrete compressive strength is found in Padang cement with a compressive strength of 45.86 Mpa, for the minimum compressive strength found in Tiga Roda cement with compressive strength value of 40.19 Mpa and for the compressive strength of cement Conch there is a second with compressive strength value 42.84 Mpa. From the explanation above, the results of 28 days of concrete compressive strength with each cement brand still not reached the planned concrete compressive strength of 38 MPa. The maximum concrete flexural strength is found in Padang cement with a flexural strength value of 5.03 Mpa, for a minimum flexural strength value found in Tiga Roda cement with a flexural strength value of 3.96 Mpa and for the value of Conch cement compressive strength there is a second with flexural strength 4.43 Mpa. From the explanation above, the results of 28 days of concrete flexural strength with each cement brand that has not reached the 4.4 Mpa plan, namely the three-wheeled cement brand.

Bearing Capacity of Soft Soil Using Bamboo-Geotextile Composite Khatib, Anwar
JURNAL SAINTIS Vol. 8 No. 2 (2005)
Publisher : UIR Press

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Construction on soft clays is often affected by stability and settlement problems. General stabilization of these soils usually involves expensive soil improvement method in order to enhance stability suitably reducing the potential and prevailing uneven settlement. Studies on soft clay reinforced with bamboo-geotextile composite overlaid by granular layer had been carried out to determine the increase in bearing capacity of strip footing on the soft clay. The bamboos were arranged in square and parallel pattern having various ratio of distance (s) to width of footing (b), s/b = 3.0, 2.0, 1.0 and 0.5. The height of granular material (u) overlying the soft clay varies with u/b = 0.25, 0.50 and 0.75. The soft clay was made from kaolin slurry that was consolidated in square boxes of 600 mm width and 1000 mm height. The results show that there is a great increase in bearing capacity and decrease of settlement at failure for the reinforced model. The bearing capacity increment of more than 127 % was recorded for bamboos of square and parallel pattern, having the s/b = 0.50 at u/b = 0.25. However, bamboo arranged in square pattern gives better improvement of bearing capacity than the parallel pattern. It can be concluded that the bamboo-geotextile composite could be used as another alternative method in improving the bearing capacity of soft clay. This will therefore benefits the construction industry especially in highway engineering.

Studi kasus Pengaruh Vortex Induce Vibration (VIV) pada Freestanding Drilling Conductor SAKA Energi Sesulu: Feasability study Vortex Effect induce Vibration (VIV) on Freestanding Energy Drilling Conductor SAKA Sesulu Adha, Augusta
JURNAL SAINTIS Vol. 16 No. 2 (2016)
Publisher : UIR Press

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[ID] Salah satu fase terpenting dalam proses eksplorasi minyak dan gas bumi adalah pengeboran sumur uji coba untuk mengetahui kandungan hidrokarbon pada sebuah reservoir minyak bumi dan gas. Arus laut dapat menyebabkan terjadinya VIV pada drilling conductor yang berujung pada terhambatnya operasi pengeboran atau kegagalan struktur akibat fatigue pada pipa conductor. Pada kondisi drilling test well, pipa conductor untuk test well harus diperlakukan sebagai struktur freestanding yang hanya mendapatkan kekangan arah lateral dari Texas Deck pada Drilling Rig pada bagian atas conductor. Paper ini akan menjelaskan metode yang dapat dipakai untuk melakukan analisa terhadap kemungkinan terjadinya VIV pada freestanding conductor. Studi kasus dilakukan pada struktur drilling conductor milik SAKA Energi Sesulu berdiameter 762 mm dengan tinggi 67.4 m. Analisa dilakukan dengan mempertimbangkan beban lingkungan pada kondisi servis dengan periode ulang beban gelombang 1 tahun dan kondisi storm dengan periode ulang beban gelombang 100 tahun. Berdasarkan analisa dinamik, dapat disimpulkan periode getar alami struktur untuk Mode 1 adalah 2.00 sec dan Mode 2 adalah 0.594. Dengan menggunakan hasil analisa dinamik tersebut pada analisa VIV berdasarkan kriteria yang disyaratkan pada peraturan DNV RP-C205 dapat disimpulkan bahwa in-line vortex vibration terjadi untuk mode 1 dan mode 2. Oleh karena itu, perlu diambil tindakan preventif untuk mencegah terjadinya kegagalan fatigue pada struktur conductor tersebut. [EN] One of the most important phases in the of oil and gas exploration process is drilling the test wells to determine the hydrocarbon content in an oil and gas reservoir. Ocean currents can cause VIV on drilling conductors which resulted in delays or structural failure in drilling operations due to fatigue in the conductor. During drilling a test well, test well conductor should be treated as a freestanding structure which is only laterally restraint from the Texas Deck on Drilling Rig at the top of the conductor. This paper will describe a method that can be used to analyze the possibility of VIV on freestanding conductor. The case studies carried out on the structure of conductor-owned drilling SAKA Energy Sesulu 762 mm in diameter with a height of 67.4 m. The analysis was performed by considering the environmental load on the service conditions with a return period of 1 year and wave loads storm conditions with a return period of 100 years wave loads. Based on dynamic analysis, we can conclude the natural period for the structure is 2.00 sec and 0.594 for Mode 1 and Mode 2 respectively. Using the results of the dynamic analysis on VIV based on the criteria from DNV RP-C205, it can be concluded that the in-line vortex vibration occurs for mode 1 and mode 2. Therefore, it is necessary to take preventive measures to prevent the occurrence of fatigue failure in the conductor.

Analisa Peningkatan Mutu Beton dan Rasio Prategang pada Kolom Langsing Prategang Berdasarkan Pola Diagram Interaksi M-N: Concrete Strength and Prestress Rasio’s Improvement Analysis of Prestressed Slender Column Based on the Interaction Curve Aripin, Basyaruddin; Ibnu, Irma Rezkianti
JURNAL SAINTIS Vol. 16 No. 2 (2016)
Publisher : UIR Press

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[ID] Struktur beton prategang adalah salah satu struktur beton yang diyakini dapat menahan gaya bending momen yang besar dan banyak diaplikasikan untuk desain balok dengan bentang panjang (elemen lentur). Namun, dengan berkembangnya zaman, desain beton prategang dapat saja diaplikasikan terhadap elemen tekan seperti kolom. Pada umumnya kolom merupakan elemen struktur yang lebih dominan menerima beban aksial, tetapi tidak menutup kemungkinan bahwa kolom, terutama pada kolom langsing, dapat menerima beban tarik yang besar ketika gaya bending moment akibat beban angin dan gempa yang terjadi. Oleh karena itu, untuk lebih memahami kinerja kolom dalam menahan beban, analisis diagram interaksi penampang kolom prategang square 1,5 x 1,5 m dilakukan dengan menggunakan program bantu excel dan mengacu pada SNI Beton 2847-2013. Analisa diagram interaksi pada kolom tersebut dilakukan dengan menggunakan dua variable yaitu rasio prategang, dan mutu beton. Hasil analisis menunjukkan peningkatan rasio prategang hingga rasio maksimum hanya akan meningkatkan kapasitas momen sebesar 9% dan menurunkan kapasitas aksial sebesar 61%. Sedangkan peningkatan mutu beton pada kolom prategang (ρps = 0,135)dapat meningkatkan kapasitas momen pada kondisi tension controls sebesar 30,47% dan aksial sebesar 48,11%. [EN] Prestressed concrete structure is one of concrete structure design that can resist large bending moment and apllied to long span concrete beam. However, nowdays, design prestressed concrete also can be apllied to column. Columns are generally considered as members under compression. But columns, espesiaclly slender columns, in a framed structure are often required to resist bending moments as well as axial forces. The bending moment may be induced by wind and earthquake forces, eccentric loads, or frame action. Therefore, for understanding specifically about the behavior and the performance of prestressed columns, square columns 1.5 x 1.5 m are analyzed using excel program and SNI code 2847-2013. Interaction curves of prestressed concrete column were analyzed using two variables (prestressed ratio and concrete strength). Analysis results show that Maximum ratio 0.260 according to ASSHTO code on prestressed concrete columns will increase tension controlled’s moment capacity by 9% but decrease axial capacity by 61%. Meanwhile, increasing the concrete strength (ρps = 0,135) will improve tension controlled’s moment capacity by 30,47% and axial capacity by 48,11%.

Studi Kelayakan Finansial dan Analisa Kebutuhan Ruang Parkir Proyek Pembangunan Hotel Tangram Pekanbaru: Financial Feasibility Study and Analysis of Parking Space Needs Development Project Tangram Hotel Pekanbaru Taufik, Hendra; Febita, Shesilya
JURNAL SAINTIS Vol. 16 No. 2 (2016)
Publisher : UIR Press

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[ID] Pembangunan hotel di Pekanbaru sangat pesat sekali dengan menjamurnya bangunan hotel baru yang cukup banyak. Pertumbuhan ekonomi yang sangat signifikan sehingga mendorong investor baik multi nasional maupun mancanegara yang menjadikan kota Pekanbaru sebagai tempat untuk berbisnis, sehingga membuat tingkat hunian hotel bertambah oleh pebisnis dari luar kota. Investasi di bidang perhotelan merupakan sesuatu hal sangat beresiko untuk diambil karena memerlukan modal yang sangat besar, untuk itu sangat penting kiranya menganalisis kelayakan pembangunan secara teknis dan finansial. Aspek teknis yang dilakukan yakni dengan menganalisa mengenai kebutuhan ruang parkir, sedangkan aspek finansial dengan menganalisis perhitungan Net present value, benefit cost ratio, internal rate of return, break even point dan juga analisa sensitivitas. Hasil yang didapatkan yakni perencanaan kebutuhan parkir 188 SRP lebih besar dari ketentuan Dirjen Perhubungan Darat 182 SRP. Investasi total hotel Rp. 417.683.772.577,85 dengan NPV sebesar Rp. 88.103.274.142,88, BCR sebesar 1,11, IRR sebesar 19,82% lebih besar dari arus pengembalian 13,50% dan BEP selama 10 tahun 7 bulan lebih kecil dari umur bangunan. Secara keseluruhan proyek investasi Pembangunan Hotel Tangram layak untuk dibangun dengan catatan minimum tingkat hunian hotel 46,90%. [EN] Rapid development of hotel constructions in Pekanbaru due to economic growth make national and international investors eager to transform Pekanbaru City into business place. Investation in lodging sector is very risky because the funds needed as initial investment is enormous. Therefore, appropriate technical and financial feasibility studies are necessary. The technical feasibility study includes the analysis of spaced required for parking slots, whereas the financial feasibility study includes the analysis of net present value, benefit cost ratio, internal rate of return, payback period, and sensitivity analysis. The analysis result shows that the available parking slot is 188 SRP, which is smaller than the standard required parking slot stated by Dirjen Perhubungan Darat (279 SRP). This indicates that the available parking slots full fill about 67% of the standard parking requirement. Hotel investation Rp 265.276.637.520,55 with NPV Rp 55.955.191.071,46, BCR is 1,11, IRR 19,82% is bigger than return flow of 13,50% and PBP for 10 years and 7 months (project plan life is 50 years). In summary, the investation project of Tangram Hotel construction is financially feasible if the minimum hotel occupancy of 46,90%. However, the investation project is not feasible for the technical aspect.

Kajian Progress Fisik pada Proyek Pembangunan Spillway Dalam Kondisi Force Majeure: Study of Physical Progress on Spillway Construction Projects Under Force Majeure Conditions Sapitri
JURNAL SAINTIS Vol. 16 No. 2 (2016)
Publisher : UIR Press

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[ID] Terjadinya cuaca ekstrim dengan curah hujan yang tinggi (mencapai 432 mm/hari), mengakibatkan bangunan Spillway yang dalam proses pekerjaan runtuh dan hanyut terbawa oleh derasnya aliran air. Tujuan dari kajian ini adalah menghitung nilai yang wajar untuk dibayarkan terhadap pekerjaan bangunan spillway yang telah hanyut terbawa bencana banjir tersebut. Metode yang digunakan yaitu review terhadap dokumen BOQ, harga satuan dan dokumentasi proyek.Wawancara juga dilakukan sebagai cross check volume hasil realisasi pekerjaan. Berdasarkan hasil kajian yang telah dilakukan, dapat direkomendasikan sejumlah biaya yang wajar untuk dibayarkan kepada kontraktor (meskipun hasil fisik pekerjaan spillway tidak terlihat karena hanyut terbawa banjir). Rekomendasi ini terdiri dari dua skenario biaya yaitu : (i) estimasi biaya tanpa material on site, dan (ii) estimasi biaya dengan material on site (material sisa yang hilang/hanyut). Hasil kajian menunujukkan bahwa biaya yang dapat diklaim dan wajar untuk dibayarkan kepada penyedia jasa yaitu sebesar Rp. 49,957,224,000.00 dengan bobot progress pekerjaan keseluruhan 73.14% (dari negosiasi). Sedangkan hasil perhitungan untuk jumlah material on site yang dapat dibayarkan oleh pihak owner secara keseluruhan yaitu sebesar Rp. 1,033,394,144.00.Jika material on site dapat dibayarkan maka total perkiraan/estimasi pekerjaan spillway yaitu sebesar Rp. 50,990,618,140.00. Harga ini lebih rendah Rp. 615,381,860.00 dari biaya yang ada pada laporan kontraktor. [EN] Extreme weather with high rainfall (reaches 432 mm / day) lead the spill way which wasunder construction proseshascollapsed and washed away by the swift flow of water. The purpose of this study is to calculate the reasonablecost that could be paid for that spillway building that has been losted. The method used is by review the documents of BOQ and unit price as well as the project’s documentation. The interviews were also conducted as a cross check for the realizationvolume. Based on the research result, a number of reasonable coststhat could be paid to the contractor was recommended (although the physic of spill way has washed away).The recommendation consists of two scenarios, they are: (a) the estimated costs without material on site, and (b) the estimated costs with material on site (costs of the leftover material). The result of this study shows that the reasonable costs that could be paid to the contractor is Rp. 49,957,224,000.00 with the weight of overall work progress is 73.14%.While the result of calculation for the material on site which could be paid by the owner to the contractor is Rp. 1,033,394,144.00. If the material on site could be paid, the total cost estimation for the spill way project is Rp. 50,990,618,140.00. It is lower Rp. 615,381,860.00 than the cost report of contractor.

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Augusta Adha

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-

Journal Mail Official
saintis@journal.uir.ac.id

Editorial Address
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Location
Kota pekanbaru,

Riau

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Augusta Adha

Contact Email augusta.adha@eng.uir.ac.id

Phone -

Journal Mail Official saintis@journal.uir.ac.id

Editorial Address -

Location Kota pekanbaru, Riau INDONESIA

Abstract

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Abstract

Contact Name
Augusta Adha

Contact Email
augusta.adha@eng.uir.ac.id

Phone
-

Journal Mail Official
saintis@journal.uir.ac.id

Editorial Address
-

Location
Kota pekanbaru,

Riau

INDONESIA