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I Ketut Sudarsana

Program Studi Teknik Sipil Fakultas Teknik Universitas Udayana

Author-ID : 2683902

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STUDI ANALISIS PENGARUH PROPERTI BETON DAN DINDING PASANGAN TERHADAP PERILAKU RDP BERLUBANG Ida Ayu Made Budiwati; I Ketut Sudarsana; Made Sukrawa; Nanda Dwi Wulan Sari
JURNAL SPEKTRAN Vol 6 No 2 (2018): Vol. 6, No. 2, Juli 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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ABSTRAK Perilaku rangka beton bertulang dengan dinding pengisi berlubang sentris (RDP) dipengaruhi oleh karakteristik material dan geometrinya. Analisis sensitivitas dilakukan pada model RDP menggunakan analisis numerik akibat variasi modulus elastisitas dinding (Em), modulus elastisitas beton (Ec), dan lebar strat diagonal (wds) pada struktur RDP. Balok dan kolom dimodel sebagai elemen frame dan dinding pengisi berlubang dimodel sebagai strat diagonal. Hasil analisis sensitivitas model RDP kemudian dibandingkan dengan hasil eksperimen peneliti lain dan diaplikasikan pada gedung perkantoran 3 lantai. Hasil analisis sensitivitas menunjukkan bahwa nilai modulus elastisitas dinding (Em), modulus elastisitas beton (Ec), dan Inersia balok (Ib) dan inersia kolom (Ik) perlu direduksi setelah 95% beban lateral dikerjakan pada struktur. Nilai reduksi pada beban 95% adalah sebesar 0,6 dan 0,8 masing-masing untuk modulus elastisitas dan inersia. Pada beban 100%, nilai modulus dan inersia dinding pengisi masing-masing direduksi sebesar 0,5 dan 0,7. Lebar strat diagonal (wds) yang digunakan dalam analisis yaitu Persamaan 1. Hasil analisis pada gedung menunjukkan bahwa peningkatan beban dari 95% ke 100% dan reduksi modulus elastisitas serta inersia, mengakibatkan peningkatan simpangan struktur, terjadi penurunan momen lapangan pada balok sebesar 4,74%-11,22%, dan penurunan momen tumpuan pada balok sebesar 12,84%-14,15%. Pada kolom, terjadi penurunan momen sebesar 1,24%-17,94%. Penurunan gaya geser pada balok terjadi sebesar 0,97%-1,63%, sedangkan pada kolom sebesar 1,67%-4,84%, namun terjadi peningkatan gaya aksial pada kolom sebesar 4,03%-5,36%.

PERILAKU TEKAN DAN LENTUR DINDING PASANGAN BATAKO TANPA PLESTERAN, DENGAN PLESTERAN DAN DENGAN PERKUATAN WIREMESH Made Yani Anggreni; I K. Sudarsana; M. Sukrawa
JURNAL SPEKTRAN Vol. 3, No. 2, Juli 2015
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Concrete blocks are one of the common materials used in construction practice because they are quite easy to get and the price is relatively cheap. Masonry (either concrete blocks or bricks) is a structure consisting of a binding material (mortar) and a filler material (such as concrete blocks). In general, masonry is very good at resisting gravity loads, but not quite good at resisting shear loads such as loads generated by earthquakes, so it requires reinforcement in the form of plaster and additional wire mesh in the plaster of the masonry. Due to several problems of the masonry frame structure, it is necessary to conduct a research on the quality of the masonry to find out the compressive and flexural behavior of the masonry with reinforcement namely plaster and wire mesh. The method used in this study was laboratory testing by creating specimens of concrete block masonry. Variations of masonry for compressive tests in this study 3 specimens varied based on the orientation namely Type A (Horizontal), Type B (Vertical) and Type C (Diagonal), and 3 specimens varied based on the treatment: masonry without plaster (TP), masonry with plaster (DP), and masonry with wire mesh reinforcement (DPW). Variations of masonry for bending tests perpendicular to the bed joint (LA) and parallel to the bed joint (LB). Based on the results the crack patterns occurring in the specimens were relatively the same, where the initial cracks occurred predominantly in the interface area between the mortar and concrete blocks. The compressive strength of the concrete block masonry with plaster had a higher value than that of with wire mesh reinforcement. This was due to adhesion between the mortar and wire mesh and poor density so the performance of wire mesh was less effective. The concrete block masonry of Type C had the highest modulus of elasticity value. This was because the propagation of cracks that occurred in the masonry of Type C was slowed down by the position of the concrete blocks, which were installed with a slope of 45o. Meanwhile, the propagation of cracks of Type A and Type B occurred vertically in the interface between the mortar and concrete blocks. Flexural strength values ??of specimens that were perpendicular to the bed joint (LTPA, LDPA, and LDPWA) were much higher than that of parallel to the bed joint (LTPB, LDPB and LDPWB). The addition of the wire mesh reinforcement to the compressive load did not contribute much to the stiffness of the masonry. Meanwhile in the bending tests, the addition of wire mesh reinforcement resulted in an increase in the flexural strength values of the concrete block masonry.

KARAKTERISTIK DAN KUAT LEKAT TULANGAN SERAT BAGU PILINAN PADA BETON NORMAL I Ketut Sudarsana; Ida Bagus Rai Widiarsa; I Gede Wira Sayoga
JURNAL SPEKTRAN Vol 8 No 2 (2020): VOL. 8 NO. 2, JULI 2020
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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ABSTRAK Penggunaan tulangan baja pada struktur beton bertulang untuk memikul tegangan tarik sangat rentan terhadap korosi. Serat bagu dipakai sebagai bahan pengganti baja tulangan untuk menghindari korosi yang sering terjadi. Perilaku tulangan dalam beton dipengaruhi banyak faktor, diantaranya lekatan antara beton dan tulangan serta panjang penanaman tulangan dalam beton. Penelitian ini dilakukan untuk mengetahui kuat lekat antara tulangan serat bagu pilinan dan beton. Benda uji yang digunakan dalam penelitian ini berupa kubus beton dengan ukuran 150x150x150 mm dengan kuat tekan rencana 20 MPa. Tulangan serat bagu ditanam pada kubus beton dengan kedalaman 75, 100, 125 mm. Hasil penelitian menunjukkan bahwa tulangan serat bagu memiliki kuat tarik berbeda pada masing-masing jumlah pilinan, dimana untuk 2 pilinan memiliki kuat tarik 28,85 MPa, 3 pilinan memiliki kuat tarik 36,16 MPa, 5 pilinan memiliki kuat tarik 30,36 MPa. Dari pengujian kuat tarik tulangan diperoleh tulangan 3 pilinan mempunyai kuat tarik yang paling besar, dimana hal ini disebabkan oleh jumlah serat yang lebih banyak dan resin yang bekerja lebih baik. Hasil pengujian kuat lekat tulangan menunjukkan bahwa kuat lekat tulangan bagu melebihi kuat lekat baja tulangan, terbukti dari kuat putus tulangan serat bagu masih lebih tinggi dari pada kuat lekat baja tulangan untuk semua panjang penanaman (75 mm, 100 mm, 125 mm).

ANALISIS FAKTOR YANG MEMPENGARUHI PARTISIPASI DAN NILAI PENAWARAN PESERTA LELANG ELEKTRONIK (E-PROCUREMENT) JASA KONSTRUKSI DI KABUPATEN BULELENG Made Respawan; I K Sudarsana; Mayun Nadiasa
JURNAL SPEKTRAN Vol 5 No 1 (2017): Vol. 5, No. 1, Januari 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract: Starting in 2012 the procurement of government goods/services in Buleleng done electronically (E -Procurement) to the procedure E -Tendering. In the implementation of participation and the bid price tends to decrease the auction participants both during the auction at the current conventional and electronic auctions. This study aims to determine the factors that influence participation and value of the electronic auction participants offer construction services in Buleleng, and what factors influence most dominant. The sample used in this study as many as 53 companies contracting in Buleleng that the sample collection was done by using a non probability sampling with purposive sampling and data collection using questionnaires and interviews. Data was analyzed using factor analysis. The factor analysis forms 11 new factors that influence the participation of bidders with cumulative variance 79,198%, which is made up of 42 variables. The most dominant factors, indicated by eigenvalues of 20.738 and variance of 42.323% is formed by 11 variables, namely, project location, great value for the project, environmental security project, started the project approaching the end of the year, without face-to-face opportunities to minimize collusion, corruption and nepotism, term timing of the access road to the project site, implementation of the rainy season, the terms of ISO certificate, the terms of financial support of banks and variable auctioneer. While the analysis of the factors affecting the bid price auction participants generate 10 new factors with cumulative variance 78,925%, which is made up of 43 variables. The most dominant factors indicated by eigenvalues of 22.756 and variance of 47.409% is formed by nine variables, namely, fluctuations in material prices, the return on investment, fluctuations in foreign exchange rates (dollars), the access road to the project site, the opportunity to gain a larger project, the risks of investing, the rate of inflation, more cost-effective without document printing costs and transportation costs and the ability to offer estimates.

ANALISIS PERILAKU HUBUNGAN PELAT-KOLOM TEPI STRUKTUR PELAT DATAR MENGGUNAKAN CONCRETE DAMAGE PLASTICITY (CDP) DALAM ABAQUS I Ketut Sudarsana; I Gede Gegiranang Wiryadi; I Gede Adi Susila
JURNAL SPEKTRAN Vol 5 No 2 (2017): Vol. 5, No. 2, Juli 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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This research was done to investigate the behavior of edge slab-column connection of flat plate structure using the CDP features of ABAQUS software. Experimental specimen obtained in the literature was modelled in ABAQUS software with CDP features to define the concrete inelastic behavior. The investigated slab-column connection is an edge slab-column subassembled connection having slab dimension of 1020 mm x 1540mm, slab thickness of 120 mm, column dimension of 250 mm x 250mm and column height of 1520 mm. The vertical load and unbalanced moment were applied through the column ends. The vertical load works in the direction perpendicular to slab surface, and the unbalanced moment perpendicular to slab free edge that is obtained from a couple of horizontal forces acting in opposite direction. As many as 22 models were analyzed for five variations on CDP parameters and mesh size. The parametric values of the CDP were varied to obtained the analysis results predict well the experimental results. The analysis shows that the parametric values of CDP such as viscosity (µ) of 0,00005, dilatation angle (?) of 40°, using tension strain to define tension behavior of concrete, and considering damage parameter due to compression and tension give the analysis results of the behavior of edge slab-column connections close to experimental result. Key words: edge slab-column connections, unbalanced moment, punching shear, abaqus, concrete damage plasticity

PERILAKU GESER BALOK TINGGI BETON SERAT BAGU TANPA TULANGAN TRANSVERSAL I Ketut Sudarsana; Ida Bagus Rai Widiarsa; Marselinus Anggur Ngganggus
JURNAL SPEKTRAN Vol 8 No 1 (2020): VOL. 8, NO. 1, JANUARI 2020
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Mekanisme geser pada balok tinggi penting untuk diperhatikan karena keruntuhan geser bersifat getas (brittle). Gaya geser umumnya kombinasi dengan lentur, torsi, atau gaya normal. Untuk mengatasi keruntuhan yang getas (brittle), perlu untuk meningkatkan persentase tulangan horizontal dan vertikal atau menggantinya dengan beton bertulangan serat (FRC). Serat Bagu merupakan serat alami yang kuat dan awet, serat Bagu banyak ditemukan dipasaran daerah Bali karena merupakan bahan yang dibutuhkan secara berkelanjutan setiap tahun pada saat perayaan Nyepi dengan harga yang terjangkau . Penelitian ini bertujuan untuk mengevaluasi prilaku geser balok tinggi beton serat Bagu dengan variasi volume serat bagu 0%, 0,25%, 0,5%, 0,75% dan 1% terhadap berat semen yang meliputi perilaku pola retak, beban retak, kekakuan dan daktilitas balok tinggi. Penelitian ini juga membandingkan tingkat keakuratan prediksi geser dari SNI. 2847-2013 dan Strut and Tie Model (STM) untuk memprediksi kapasitas geser balok tinggi beton serat Bagu. Sebanyak 10 buah balok tinggi dengan ukuran 150x450x1500mm dibuat dan diuji diatas perletakan sederhana dengan dua buah beban terpusat pada jarak 370mm dari tumpuan. Balok dengan tulangan longitudinal tunggal 2D16mm. Hasil penelitian menunjukan bahwa penambahan 0,75 % serat Bagu menurunkan prosentase jumlah retak lentur sebesar 75 %, peningkatan beban retak lentur pertama sebesar 341,67%, beban retak geser pertama sebesar 170 % dan daktailitas balok sebesar 6,92% pada kondisi sebelum retak pertama dan 0,26% pada kondisi setelah retak pertama. Prediksi kapasitas geser balok tinggi beton serat Bagu tanpa tulangan transversal dengan metode STM lebih baik dari SNI dengan nilai rata-rata rasio Vexp/VSTM atau Vexp/SNI masing-masing sebesar 1.16 untuk teori STM dan 2,47 untuk teori SNI.

ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI WAKTU TUNGGU PENGADAAN MATERIAL KONSTRUKSI PADA PROYEK GEDUNG DI KABUPATEN BADUNG Putera Kumarayasa Mudita; I K. Sudarsana; Mayun Nadiasa
JURNAL SPEKTRAN Vol 4 No 2 (2016): Vol. 4, No. 2, Juli 2016
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract :When undertaking construction projects, the smoothflow of materials to the project site must be maintained.Waiting for material, which frequently happens, will have a big impact, especially for large-scale projects that use a lot of labor. If the arrival of the materials is not in accordance with the schedule of material procurement planning, the workers will have nothing to do and the project cost will blow out and there will be delays in project completion time. This research investigates the factors which influence the lead time of construction material procurement in the Badung Regency. Data was obtained by distributing a questionnaire to 50 respondents. A research sample was obtained by purposive sampling aimed at the experts who work on building projects in the Badung regency. Before being used as a research instrument, the questionnaire was tested for the validity of data by using the Pearson Product-Moment correlation and its reliability was tested using the Cronbach alpha method. Processing and data analysis was conducted by Factor Analysis. The research results show there are twenty four variables identified that influence the lead time of construction material procurement on building projects in the Badung regency. All variables can be grouped into seven factors (Factor I, II, III, IV, V, VI, VII). The most dominant factor reviewed based on the percent of variance is Factor I which is formed by six variables being the material production process at the suppliers, the relationships between contractors and suppliers, a lack of material stock at the suppliers, the availability of material transportation, access to the project, and extreme topography.

PENGARUH MODIFIKASI KOLOM PERSEGI MENJADI BULAT MENGGUNAKAN METODE CONCRETE JACKETING DENGAN KAWAT KASA ATAU FIBERGLASS TERHADAP KAPASITAS AKSIAL KOLOM Ida Bagus Rai Widiarsa; I Ketut Sudarsana; David Pramono
JURNAL SPEKTRAN Vol 8 No 1 (2020): VOL. 8, NO. 1, JANUARI 2020
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Kegagalan pada kolom dapat menyebabkan keruntuhan suatu struktur bangunan. Salah satu cara meningkatkan kemampuan kolom menahan beban adalah dengan perkuatan. Material beton, kawat kasa, dan fiberglass merupakan material yang mudah dikerjakan dan tersedia dipasaran. Penelitian ini dibuat untuk mengetahui pengaruh modifikasi bentuk penampang kolom beton persegi menjadi bulat dengan tambahan kekangan kawat kasa atau fiberglass terhadap kapasitas aksial kolom. Pada penelitian ini dibuat 18 buah benda uji kolom yang dibagi menjadi 6 kelompok. Benda uji berukuran 76 mm x 76 mm x 300 mm yang terbuat dari beton polos disebut KP. Kolom KP diperkuat dengan concrete jacketing menjadi berdiameter 150 mm dengan tinggi 300 mm disebut kolom KB. Selanjutnya kolom KBT merupakan kolom KB yang diberikan tambahan perlakuan treatment sandblasting pada permukaan core kolomnya. Kelompok lainnya adalah kolom KK yang merupakan kolom KBT dengan tambahan 3 lapis kawat kasa sebagai pengekang internal pada jacketing. Kolom KF merupakan kolom KBT dengan tambahan 3 lapis fiberglass yang dilapisi resin sebagai pengekang internal pada jacketing. Kelompok keenam merupakan kolom KF dengan tambahan pin dari serat fiberglass terpasang kearah luar jacketing. Hasil penelitian menunjukkan terjadi peningkatan kapasitas kolom akibat perlakuan sandblasting sebesar 10%. Penggunaan kawat kasa atau fiberglass sebagai pengekang memberikan peningkatan kapasitas pada kolom KK, KF, KFP masing-masing sebesar 21%, 29% dan 30%. Keruntuhan kolom pada kolom KP, KB, KBT, KF dan KFP adalah non-daktail sedangkan kolom KK menghasilkan perilaku keruntuhan yang lebih daktail dibandingkan dengan benda uji kolom lainnya.

MANAJEMEN RISIKO PADA PROYEK KONSTRUKSI DENGAN METODE FAST TRACK STUDI KASUS PROYEK QUNCI VILLAS DAN PUTRI NAGA KOMODO I Gusti Ketut Wirawan; I K. Sudarsana; , IBN. Purbawijaya
JURNAL SPEKTRAN Vol. 3, No. 2, Juli 2015
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The rapid economic development such as now day, it need a construction method that may provide a facility faster and less cost. Therefore, fast track method has been widely applied in project management as happened in Qunci Villas Project at Lombok and Putri Naga Komodo Project at Loh Liang of Komodo Island. Fast track construction method has potential risks that can interfere the success of the project. This study aims to identify the risks, especially the mayor risk, to formulate the mitigation action, and to determine the risk ownership. This study was conducted using qualitative descriptive method by identifying the risks arising during the implementation of the fast track method on Qunci Villas and Putri Naga Komodo Projects through the study of literature, brainstorming, interview using questionnaires to those who knew or were involved in the project. So the frequency and magnitude of the consequences of each risk can be known. Then the risk assessment can be conducted to determine the mayor risk and the minor risk. Then determining mitigation action for the mayor risk to reduce the negative impact that may arise. Then allocating the risk ownership in other to the mitigation action can be handled properly. The risk identified totaled 25 risks consisting of : 1 risk (4%) which was medium risk rating, 6 risks (24%) which were high risk rating, and 18 risks (72%) which were extreme risk rating. The mayor risk amounted to 24 risks (96%). The mayor risk which were high risk rating consisting of : 1 planning risk, 3 technical risks, 1 project risk and 1 criminal risk. While mayor risk which were extreme risk rating consisting of : 5 technical risks, 10 project risks, 2 financial risks, and 1 human risk. Mitigation action were handled by reducing likelihood and consequence. The most risks ownership were allocated to the contractor.

ANALISIS SIKAP DAN PERILAKU KONSUMEN TERHADAP PEMILIHAN RUMAH TINGGAL PADA KAWASAN SUNSET GARDEN DI KOTA DENPASAR, BALI I K. Ade Siswanta; I K. Sudarsana; I Gst. Ketut Sudipta
JURNAL SPEKTRAN vol 2, No 1, Januari 2014
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The research is motivated by the more selective consumers in choosing a house which impact on changes in market conditions ongoing. Developers should anticipate factors that influence changes in market conditions, such as attitudes and behaviors of consumers in choosing a house. One excample of this condition is development of Sunset Garden area located at Jalan Pura Mertasari Sunset Road, Denpasar, Bali which is this properties are able to attract consumers to buy houses in this area although this price of the house is quite expensive. Therefore, the research was conducted to determine factors that are considered in the selection of residential, consumer attitudes and behavior on the selection of a house and the relationship of consumer characteristics and attributes of products offered in this area. This study used research instruments such as questionnaires to obtain information on the characteristics of respondents and the four components of the attitudes and behavior of the level of confidence, the level of evaluation, the level of normative beliefs and motivation levels. The data analysis technique used is a factor analysis to identify the factors considered in choosing a house, attitudes and behavior analysis with Fishbein method and contingency coefficient analysis to determine the magnitude of the relationship variable product attributes and consumer characteristics. The results of this study indicate the factors that affect the house is 5 (five) factors, they are the location and the legality factors, supporting facilities factors, physical factors, factor values, and environmental factors. Attitudes and behavior are shown in choosing a house on Sunset Garden Zone fall into this category good enough. The results showed that there is a relationship between consumer characteristics and attributes of the product which the consumer's income level has the strongest ties to the variable price of the product.

Co-Authors A. A. Diah Parami Dewi A. A. N. A. Angga Pradhana A.A. Ayu Istri Laksemana Dewi A.A. Ayu Istri Laksemana Dewi A.A.G.A. Yana Amanda, Anastasia Anak Agung Gde Agung Asmara Anak Agung Gede Sutapa Arnawa, I Putu Ayu Swandewi Trikusuma Caridad N. Barrameda D.M Priyantha Wedagama D.P.G Sugupta David Pramono Dewa Ayu Hendrawathy Putri Dharma Putra Dharma Putra Dharmayanti, Gusti Ayu Putu Candra Dwi Wiranata Gd. Astawa Diputra Gede Pringgana Gilbert S. Arrieta Gusti Ayu Rai Mahayani Hendra Wijaksana I Dewa Gede Rat Dwiyana Putra I G. A. Susila I G.N.K. Udara I Gede Adi Susila I Gede Gegiranang Wiryadi I Gede Wira Sayoga I Gusti Ayu Putu Wegie Puryandhari I Gusti Ketut Sudipta I Gusti Ketut Wirawan I K. Ade Siswanta I Made Alit Karyawan Salain I Nyoman Sutarja I P. Alit Suthanaya I Putu Laintarawan I Wayan Dana I Wayan Dana I Wayan Sudithayasa I.B. Dharma Giri I.G.N. Suditha I.N. Lanus Ida Ayu Budiwati Ida Ayu Made Budiwati Ida Bagus Dharma Giri Ida Bagus Ngurah Purbawijaya Ida Bagus Rai Widiarsa K. Astawa Ketut Ardhana Ketut Sidang Partayasa Luh Putu Eka Anggreni Made Respawan Made Sukrawa Made Yani Anggreni Marselinus Anggur Ngganggus Mayun Nadiasa Mulya Dewi N.L.P. Eka Agustiningsih Nanda Dwi Wulan Sari Ni Kadek Armini Ni Luh Putu Pradnyadewi Ni Made Anggreni Ni Made Dwi Ari Astuti Ni Made Tutarani Ni Nengah Selasih Ni Putu Candra Prastya Dewi Ni Wayan Novi Suryantari Putera Kumarayasa Mudita Putu Agus Nusada Putra Putu Deskarta Putu Didik Sulistiana Putu Hendra Kusuma Putu Lokantara Rahayu Ria Kusumawati Saputra, I Gede Yoga Dana Wayan Mustika Yohanes Angga Wijaya

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