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ANALISIS KINERJA STRUKTUR BETON BERTULANG DI WILAYAH GEMPA INDONESIA INTENSITAS TINGGI DENGAN KONDISI TANAH LUNAK Reza, Sri Fatma; Suryanita, Reni; ', smeddiyanto
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Salah satu konsep perencanaan struktur di wilayah Indonesia adalah dengan menganalisiskinerja struktur setelah terjadinya gempa, mengingat Indonesia merupakan bagian dari wilayahyang rentan terjadi gempa bumi dan letusan gunung berapi. Tujuan artikel ini adalah untukmemperlihatkan kinerja dan distribusi sendi plastis gedung beton bertulang beraturan denganmenggunakan metode analisis statik nonlinier. Model bangunan diberikan beban gempa beruparespons spektrum wilayah gempa dengan nilai percepatan tanah (g) tinggi dan berada dikondisi tanah lunak. Kinerja bangunan ditentukan dengan menggunakan code ATC-40 yangdipengaruhi oleh target perpindahan. Metode yang digunakan untuk memperoleh nilai targetperpindahan adalah metode spektrum kapasitas ATC-40 dan koefisien perpindahan FEMA356. Hasil analisis memberikan nilai target perpindahan metode spektrum kapasitas ATC-40adalah 0,295 m sedangkan metode koefisien perpindahan FEMA 356 memberikan hasil 0,536m. Kinerja struktur untuk kedua nilai target perpindahan menunjukkan level Damage Control(DC) yang berarti kondisi gedung belum mengalami kerusakan berat dan dapat difungsikankembali.Kata kunci: analisis statik nonlinier, beton bertulang, gempa intensitas tinggi, kinerjastruktur, tanah lunak
RESPONS STRUKTUR BANGUNAN BERDASARKAN SPEKTRA GEMPA INDONESIA UNTUK IBUKOTA PROVINSI DI PULAU SUMATERA Jingga, Hendra; Suryanita, Reni; Yuniarto, Enno
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Sumatera Island is a very active seismic area in Indonesia, which is crossed by the infamousPacific Ring of Fire. The western side of Sumatera Island suffers more from the groundshaking due to its closer distance to the epicenter. Combined with huge coverage of soft soil,building structures built on this island may experience excessive deformation and eventuallycollapse in a brittle way. For high-rise reinforced concrete (RC) building, the impact is evenmore devastating and may endanger its occupants. Due to these facts, this study aims toanalyze the deformation characteristic (story-drift) of high-rise RC building under earthquakeloading in Sumatera Island. Modal response spectrum analysis is performed to compute themaximum story-drift of three RC building models (10 story, 15 story, and 20 story) used in thisstudy. The seismic acceleration response spectrum function is derived from the lastestIndonesia’s Seismic Hazard Map (2010) and SNI 1726-2012. Eight capital cities in SumateraIsland and three soil conditions (soft, medium, and hard soil) are selected to generate 24seismic acceleration response spectrum functions. Combined with three RC building modelvariations, 72 story-drift data are obtained for each X and Y horizontal direction. Based on theanalysis result, taller buildings in soft soil condition are at greater risk to experience excessivedeformation due to seismic loading. Seismic locations in the western side of Sumatera Island isalso observed to exhibit higher seismic hazard compared to central and eastern side ofSumatera Island.Keywords: artificial neural network (ANN), earthquake, modal response spectrum analysis,structural response, Sumatera Island
Pengaruh Penambahan Serat Ampas Tebu Terhadap Sifat Mekanik Pada Campuran Beton Normal Kampati, Tri Budi; Djauhari, Zulfikar; Suryanita, Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bagasse is a waste material and the use of this material for construction is still limiterd. In this study, fiber extracted from bagasse was used in teh concrete. This research aimed to examine the mechanical properties of concrete, namely compressive strength, bending strength and split tensile strength. The percentage of bagasse fiber used was 0.3%, 0.5% and 0.7% of the weight of coarse aggregate. Compresive strength was tested on the age 7 days, 14 days, and 28 days, while the flexural strength and split tensile strength were tested on the age of 28 days. Workability test conducted on specimens contained 0.3%, 0.5%, and 0.7% of bagasse showed the volume of slump at 8 cm, 6.5 cm and 4.5 cm. In testing the compressive strength of concrete, the highest value was produced from normal concrete which was 22.92 MPa.The value of flexural strength of concrete increased by 9.47% from the normal flexural strength of concrete with the addition of 0.5% bagasse at 4.45 MPa. Different with the value of concrete split tensile strength, the highest value was obtained in the addition of 0.3% bagasse, which was 2.21 MPa with an increase of 19.48% of normal concrete. This research concluded that the addition of bagasse fiber can reduce workability.On compressive strength testing with the addition of bagasse fiber, the compressive strength was lower than that of normal concrete but still within the range of concrete plan quality 17 MPa. Addition of bagasse fiber to the concrete mixture could increase the flexural strength by 0.5% and split tensile strength by 0.3%.With the addition of bagasse fiber to concrete, it is hoped that bagasse waste can be utilized and concrete quality is achieved Keywords: Fiber Concrete, Bagasse Fiber, Split Tensile Strength, Flexural Strength, Compressive Strength
Analisis Studi Eksperimental Sifat Mekanik Bata Ringan (Cellular Lightweight Concrete) Akibat Pembebanan Displacement Control Efendi, M. Rizal Dika; Suryanita, Reni; Maizir, Harnedi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Light brick is a brick that has a specific gravity ranging between 600 to 1600 kg/m3. Light brick has the main raw material consisting of sand, cement, water, coupled with a foaming agent material. The aim of the study was to obtain the composition of the optimum light brick mixture which resulted in maximum compressive strength. The compressive strength of the lightweight concrete was measured by applying compression displacement-controlled loading system. The mixture of each composition for the lightweight concrete used in this study was compliance with Ministry of Public Works module for lightweight mortar technology heap foam material for road construction. Light brick composition was varied based on the percentage of foaming agent and sand. The optimum composition has 25 kg cement, water as much as 13 kg, sikament NN 200 ml, sand as much as 64 kg and foaming agent as 5.7 kg of 12 samples of the test specimen. The compressive strength of optimum composition at the age of 3, 7, 14 and 28 days was 0.264 MPa, 0.364 MPa, 0.511 MPa, and 0.648 MPa, respectively. Based on test results, it was concluded that the addition of the foaming agent and sand would increase the compressive strength of the light brick. Keywords: Brick Lightweight CLC, Compressive Strength, Displacement Control Method, Optimal composition.
Pengaruh Penambahan Abu Ampas Tebu Terhadap Sifat Mekanik Beton Pada Campuran Beton Normal Akbar, Ilham; Djauhari, Zulfikar; Suryanita, Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The increasing in the population has an impact on the increasing of housing or bulding demand. The alternative solution to reduce the use of cement is by leveraging on natural materials such as baggase ash as a substitution part of cement in the concrete mixtures. Results from test showed that silicte (SiO2) content in bagasse ash was dominant, so that it might be used as a cement substitution to enhance the properties of the concrete. The specimens were tested at 7, 14, 28 and 56 days of treatment to observe the development of bagasse ash concrete with the variation of the ash at 5 % and 10 % from the weight of the cement. The result showed that the higher percentage of bagasse ash would result lower workability. The compressive strength has also decreased from normal concrete at 28 days of the treatment, at 5 % variaton that has a compressive strength at 21,221 MPa and 10% variation has a result at 16.411 MPa. Propertional to compressive test, the flexural test has also decreased from normal concrete, at 5% variation has a flexural strength at 3.60 MPa and at 10 % variation has a result at 3.40 MPa. It was because imperfect of bond between Ca(OH)2 with SiO2. Hence, instead of cement substitute, bagasse ash rolled better as filler in concrete mixtures. Keywords: bagasse ash, concrete, compressive strength, flexural strength, workability
Perbandingan Algoritma Genetika dan Backpropagation pada Aplikasi Prediksi Penyakit Autoimun Setiawan, Debi; Putri, Ramalia Noratama; Suryanita, Reni
Khazanah Informatika Vol. 5 No. 1 Juni 2019
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/khif.v5i1.7173

Abstract

Penyakit autoimun adalah penyakit yang disebabkan oleh sistem imun yang kacau. Sehingga imun pada tubuh penderita menyerang penderita itu sendiri. Penelitian di Amerika Serikat menunjukkan lebih dari 23,5 juta penduduk menderita penyakit autoimun, sumber data Departemen Kesehatan dan Layanan Kemanusiaan Amerika Serikat. Pada data SIRS Online Ditjen Pelayanan Kesehatan 2017 menunjukkan data proporsi pasien berjenis kelamin laki-laki 54,3% dan pasien berjenis kelamin wanita 45,7%. Meningkatnya penderita penyakit autoimun disebabkan sulitnya untuk mendiagnosis penyakit autoimun, karena gejala dari penyakit autoimun bervariasi. Penelitian ini membandingkan algoritma backpropagation dan algoritma genetika dalam memprediksi penyakit autoimun. Perbandingan dilakukan berdasarkan nilai accuracy, sensitivity, dan precision. Data yang digunakan dalam penelitian ini adalah 24 data pasien penyakit dalam. Prediksi penyakit autoimun menggunakan algoritma backpropagation memiliki nilai accuracy 0.83, sensitivity 97%, dan precision 75%. Sedangkan prediksi penyakit autoimun dengan algoritma genetika memiliki nilai accuracy 0.76, sensitivity 81%, dan precision 75%. Dari perbandingan tersebut dapat disimpulkan bahwa algoritma backpropagation memberikan prediksi penyakit autoimun lebih baik dari algoritma genetika.
Kuat Tekan Beton Pasca Bakar Menggunakan Hammer Test Dan Compression Testing Machine (Ctm) Widianto, Devit; Suryanita, Reni; Sitompul, Iskandar Romey
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Concrete is a construction material that is widely used in construction because it has many advantages. One of the advantages of concrete construction is that it is resistant to fire. However, the occurrence of a fairly high temperature change will have an impact on concrete, one of which is the change in the strength of the concrete. Therefore, this research was conducted to determine the physical change and the change of strength in post burn concrete. The concrete strength was measured with hammer test and compressive test. 18 concrete cylinder with size of 150 mm and height of 300 mm were fabricated with 3 quality variations, namely 20 MPa, 25 MPa and 30 MPa. Concrete were burned for 30 minutes with the temperatures range between 680-700 oC, and the concrete strength was calculated by using Nash’t and Agunwamba equation. The results showed that the concrete strength predicted by using Nash’t formula was 17, 18 and 21 MPa, respectively whice those predicted Bay pusing Agunwamba was 21, 23 and 26 MPa respectively.Keywords: Compressive strength, concrete after burn, Hammer Test, Compression Testing Machine (CTM).
Analisis Jembatan Busur Pejalan Kaki Berdasarkan Variasi Letak Lantai Kendaraan Ardiansyah, M. Syukri; Ismeddiyanto, Ismeddiyanto; Suryanita, Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Sturdy bridge construction has always been synonymous with large and impractical structures. New innovations are needed to create a bridge system that is practical but also robust in terms of strength. For this reason, pedestrian arc bridges are analyzed with deck variations. The purpose of this study is to obtain the optimum bridge model, in which the ratio of weight of bridge structure deflection is small. Three types of bridges were considered in this study e.g deck arch, through arch and a half through arch by comparing the stresses that occur as well as the weight ratio and bridge deflection. The most optimum bridge is that produced the smallest efficiency ratio value. The results of the analysis obtained are A Half-Through Arch which has the best performance in distributing internal forces evenly. The Deck Arch weight is 1,125.52 tons, A Half-Through Arch weighs 1,007.14 tons and the Through Arch weighs 975.61 tons. The maximum deflection on the Deck Arch is 243.41 mm, A Half-Through Arch is 309.95 mm and the Through Arch is 260.19 mm. Then, the efficiency ratio of Deck Arch is 4.62, A Half-Through Arch is 3.25 and Through Arch is 3.75. So, it can be concluded the most optimum bridge is A Half-Through Arch with the smallest efficiency ratio value of 3.25. A Half-Through Arch are more efficient 13.34% than Through Arch and 29.73% more efficient than Deck Arch.Keywords : Analysis of Bridges, Arch Bridge, Steel Bridge, Bridge Loading, Deflection, SAP2000.
Pemodelan Perilaku Tegangan dan Regangan Beton pada Suhu Tinggi dengan Software LUSAS Suryanita, Reni; Rahmadhan, Wahyu; Kamaldi, Alfian
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 25, Nomor 1, JULI 2019
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (767.458 KB) | DOI: 10.14710/mkts.v25i1.20575

Abstract

The concrete structure exposed to high temperatures can affect the strength of the structure. Limitations in the experimental method can be solved by mathematical modeling. This study aims to identify the stress and strain behavior that occurs at high-temperatures. The model is a cylindrical concrete with a diameter of 150 mm and a height of 300 mm. The concrete strength design is 25 MPa. The temperatures of the model are 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, 600 °C, and 700 °C. The model analysis using LUSAS v. 16 Software to observe the properties of the concrete material due to exposure to high temperatures. The results of the study get the higher the temperature received by concrete, the strength of the concrete decreases. Concrete that burned to a temperature of 300 °C still had 82% available power, and at a temperature of 700 °C, the remaining concrete strength was 30%. The strain increases to 423% from normal conditions at a temperature of 700 ° C. Therefore, the results of the study can be used as a reference for structural engineers to know the behavior of the concrete that exposure to high temperatures.
Evaluasi Kesehatan Struktur Bangunan berdasarkan Respon Dinamik Berbasiskan Data Akselerometer Darmawan, Wan Fikri; Suryanita, Reni; Djauhari, Zulfikar
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 23, Nomor 2, DESEMBER 2017
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.455 KB) | DOI: 10.14710/mkts.v23i2.16101

Abstract

The aim of the research is to analysis the health of a simple frame structure based on accelerometer data. The research is a preliminary study which used the accelerometer data in the time history analysis of the structure. The parameters has been used in the study are the Story Damage Index (SDI), the ApproximateStory Damage Index (ASDI), the Flexibility Damage Index (MFDI), and the Park Ang Damage Index. The finite element analysis is used to identify the damage of building structures through the pushover analysis. The study has conducted the minor damage index, physical appearance to check the cracked beam andconcrete column. The damage index average is in the range 0-0.08. It can be concluded the building is still able to withstand the earthquake load. However, the building is stated in a minor damage condition after the earthquake occurred.
Co-Authors ', smeddiyanto Abrar Rifqi Pratama Afisha, Elly Ahmad Hamidi Ahmad Obi Narman Ahmad Riadi Ahmad Riadi Alex Kurniawandy Aminuyati Andi Wijaya Anggi Agusstiawan Appriliya Destiyani Aprilia Andoni, Elsa Aras Mulyadi Ardiansyah, M. Syukri Ardyansah, Rofika Ratna Ari Sandhyavitri Ari Vera Indra Ariadi, Koko Putra Arif Rahman Azlan Adnan Azlan Adnan Benny Hamdi Rhoma Putra Beny Setiawan Brian Priadana Mulrony Chitra Hermawan Dandio Ahmad Fansuri Darmawan, Wan Fikri Debi Setiawan Debi Setiawan, Debi Dede Eldi Kurniawan Delita Zul Dimas Arief Wicaksono Djauhari, Zulfikar Dwiqhee Abdul Ghani Dyna Aulia R Efendi, M. Rizal Dika Eki Syahyudi Elly Afisha Elsa Aprilia Andoni Elsyani Eka Putri Elva Nidya Sari Enno Yuniarto Erizal ' Fadrizal Lubis Fansuri, Dandio Ahmad Firzal, Yohannes Florisa Florisa Florisa Florisa Garcya, Muhammad Gala Geovani Meiwanda Hanantatur Adeswastoto Harnedi Maizir Hendra Fernando Hendra Jingga, Hendra Heru Nurcahyo Heru Satiadi, Heru Heru Setiadi Ilham Akbar Imam Mustafa Iqbal Maulia Iskandar Romey Sitompul Ismail Rahmadtulloh Ismed Diyanto Ismeddyanto Ismeddyanto Ismeddyanto, Ismeddiyanto Ismediyanto Ismediyanto Joni, Mustika Jusoh, Mohd Zamri Kamaldi, Alfian Kampati, Tri Budi Maharani Miranda Makahani, Satria Mamoru Kikumoto Mardalisa , Mardalisa Mardiyono Mardiyono Mardiyono Mardiyono Mardiyono, Mardiyono Maya Rumiati MG, Intan Monica Monica, Tiara Monita Olivia Mustika Joni Nila Kamelia Nopember Toni Nopember Toni, Nopember Poppy Nurmayanti Puri Awanda Cantikawati Putra, Azlansyah Mudahir Putri, Ade Septiani Rahmadi Rahmadi Rahmadi Rahmadi Rahmiasari Rahmiasari Raihan Arditama Harnedi Raja Parulian Purba, Raja Parulian Rama Dwi Aryandi Ramalia Noratama Putri Randhi Saily Rendy Wijaya Revo Sedrian Putra Rexi Putra Rian Fajri Ramadanas Ricky Andriano Ridwan Ridwan Ridwan Ridwan Rizki Zulapriansyah Rofika Ratna Ardyansah Roma Dearni RR. Ella Evrita Hestiandari Rumiati, Maya Satria Makahani Sedrian Putra, Revo Simamora, Idris David Fernando Siregar, Andi Saputra Soewignjo Agus Nugroho Solly Aryza Sondra Raharja Sri Agustin Sri Agustin Sri Fatma Reza Sri Fatma Reza, Sri Fatma Sri Indarti Syahnandito Syahyudi, Eki Syamsul Fikri Syauqi, Muhammad Tauladan, Muhammad Wafiq Tia Aurelia Tiara Monica Vindi Trisatria Vindy Salim Vomania, Vomania Wahyu Rahmadhan, Wahyu Wicaksono, Adhithiya Widianto, Devit Yenita Roza Yessi Olivia Yon Subagiono Yosi Alwinda Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari Zulfikar Djauhari Zulkarnain Zulkarnain Zulkarnain Zulkarnain Zunwanis Zunwanis