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All Journal Jurnal Spektran MEDIA KOMUNIKASI TEKNIK SIPIL Journal of International Conference Proceedings
I Gede Adi Susila
Program Studi Teknik Sipil Fakultas Teknik Universitas Udayana
Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media

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Perilaku Seismik Struktur Rangka Komposit RCS dengan Variasi Rigidity Zone Factor Pertemuan Balok-Kolom Sudarsana, I Ketut; Susila, I Gede Adi; Sastraningsih, Ni Wayan
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 1, JULI 2021
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.685 KB) | DOI: 10.14710/mkts.v27i1.29390

Abstract

This research evaluated the effect of connection’s rigidity zone factors of RCS frame’s connections on the seismic behavior of regular RCS frames of a five-story office building located at seismic design category (SDC) of D. The variations on rigidity zone factors were 0, 0.25, 0.50, 0.75, and 1.0, respectively for Model MS, MSR025, MSR05 MSR075, and MR with the same elements’ dimension. A 3-D finite element modeling was conducted to do a linear elastic analysis for structural design and nonlinear static pushover analysis for evaluating the structural seismic performance. The results show that all models have met the strength and serviceability design limits. The seismic performances in terms of base shear, elastic stiffness, and ductility of all RCS models increased with an increase in the values of the rigidity zone factor. The structural performance level according to FEMA 440 was life safety (LS) for the Model MSR05, MSR075, and MR, while for the Model MS and MSR025 was collapse prevention (CP). The seismic energy dissipation for all RCS frames was an intermediate category indicated by the numbers of developed plastic hinges less than 20% of the total potential plastic hinges
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (875.439 KB)

Abstract

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
STUDI PERBANDINGAN PERILAKU DAN KINERJA STRUKTUR BAJA MENGGUNAKAN KOLOM KOMPOSIT CONCRETE ENCASED DAN CONCRETE FILLED TUBE, SERTA NON KOMPOSIT I Ketut Diartama Kubon Tubuh; Made Sukrawa; 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.572 KB)

Abstract

Comparative study of steel structure behavior and performance using composite and non composite columns were done by making five structure models. A model using wide flange steel columns, two models with circular and square concrete encased columns (MCEC and MCES), also two models with circular and square concrete filled tube columns (MCFTC and MCFTS). Columns on 4th-5th floor are smaller than columns on three floors below. Structure behavior were observed through elastic analysis which are displacement and interstory drift. While structure performance were evaluated through non linear static Pushover analysis using SAP2000®. The analysis showed that with P-M ratio ranging from 0.79 until 0.88, all models interstory drifts were exceed limit on 1st, 2nd and 4th floors. Countermeasures were done by rotating half of total MS steel columns (then became MS-R), enlarging 4th-5th floor columns on MS-R and MCFTC, and also installing eight X-bracings on all models ground floor. Pushover analysis showed that performance level of all models are Immediate Occupancy (IO) except MCFTS. MCFTS model which in Collapse (C) performance level were improved by increasing thickness of steel section (then became MCFTS-Improved) and resulting IO performance level. Calculation of structure materials cost showed the most expensive until the cheapest models respectively were MS-R, MCFTS-Improved, MCEC, MCES, and MCFTC with comparison 1:0,99:0,88:0,87:0,86. Keywords: concrete encased (CE), concrete filled tube (CFT), X-bracing, Pushover analysis
APPRAISAL PROYEK PENGEMBANGAN HOTEL SOL HOUSE DI KABUPATEN BADUNG – BALI I Gede Adi Susila; Anak Agung Gde Agung Yana; I Gusti Agung Ananda Putra
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (764.987 KB)

Abstract

Appraisal atau Penilaian merupakan proses pekerjaan atau kegiatan seorang appraiser (penilai) dalam memberikan suatu estimasi atau opini atas nilai ekonomis suatu properti, baik berwujud ataupun tidak berwujud. Appraiser memiliki peran penting sebagai penilaian proyek konstruksi terdiri dari tahap studi kelayakan, tahap proses konstruksi dan tahap pasca konstruksi pada Proyek Pengembangan Hotel Sol House di Jalan Bakung Sari No. 81, Badung-Bali. Penelitian ini menunjukkan bahwa hasil appraisal pada proyek konstruksi sebagai berikut: 1) Appraisal dalam tahap studi kelayakan ditinjau dari aspek finansial hasil yang diperoleh yaitu nilai NPV sebesar Rp 13.772.240.994 > 0 (layak), BCR sebesar 1,0602 > 1 (layak), IRR sebesar 15,67% > nilai MARR 13% (Layak) dan PBP selama 8 tahun 11 bulan (layak). Berdasarkan hasil tersebut dapat dikatakan bahwa investasi Pengembangan Hotel Sol House layak untuk mendapatkan pinjaman bank. 2) Appraisal dalam tahap proses konstruksi Pengembangan Hotel Sol House yaitu dengan menggunakan metode earned value. Hasil analisis prestasi fisik sampai dengan periode bulan ke 13 untuk seluruh pekerjaan proyek pembangunan Hotel Sol House telah mencapai prestasi sebesar 79,14% atau setara dengan nilai Rp. 75.718.009.000, nilai CPI sebesar 1,233 > 1 yang berarti kinerja keuangan baik. Sedangkan nilai SPI sebesar 0,80 < 1 sehingga dapat disimpulkan bahwa pelaksanaan proyek lebih lambat dari jadwal awal pembangunan hotel. 3) Appraisal dalam tahap pasca konstruksi Pengembangan Hotel Sol House (diasumsikan telah terealisasi 100%). Hasil analisis menggunakan pendekatan biaya diperoleh nilai pasar properti sebesar Rp. 435.600.000.000 (dengan rincian nilai pasar tanah sebesar Rp. 346.500.000.000 dan nilai pasar bangunan sebesar Rp. 89.100.000.000) terjadinya perkembangan nilai pasar bangunan pada tahap pasca konstruksi dengan tahap studi kelayakan dikarenakan perubahan material, sedangkan hasil analisis menggunakan pendekatan pendapatan diperoleh nilai sebesar Rp. 76.203.168.255.
Strengthening Using Type-V Bracing for Structural Integrity of Reinforced Concrete Frame Resists Earthquake Loads Made Sukrawa; I Gede Adi Susila; Aditya Permana Putra
Journal of International Conference Proceedings (JICP) Vol 2, No 1 (2019): Proceedings of the 3rd International Conference of Project Management (ICPM) Bal
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v2i1.434

Abstract

Relatively new seismic code has been introduced in Indonesia (SNI 1726-2012) which affects old structures. Mostly, the existing structures does not meet the requirement of new regulation: overstressed. Therefore, it is important to strengthen reinforced concrete (RC) structure in order to meet the performance level and structural behaviour satisfied. In this study, the retrofitting method was performed by using a type V steel braces both external and internal settlement. Clearly, the advantage of braces is significantly increases lateral capacity where small amount of mass also invoked into the structures. Computer simulation using SAP2000 found that most of the structures have been overstress on its components, indeed reinforcement is necessary with braces. Nonlinear pushover analysis was performed on type-V braces with and without perimeter frames which reviewed structural performances. Evaluation of 3, 5, 8 and 10 storey structures designed under previous code and failures of structural components found after the most recent code to be implemented. Lateral load capacity and structural performance were observed to determine the capability dissipate earthquake energy that occurred in structural components with plastic joints distribution. Results of study provides comparison of behaviour and performance of each model. It found that the ultimate capacity of each model produced can increase base shear up to ± 150% larger compared to the existing structures. From pushover analysis, the curve of each model measured for performance level and it found to be set of the Operational (O), Immediate Occupancy (IO) and it has not been exceeded the Live Safety level (LS) as the result of structural strengthening using bracing. The bracing applied will provide a higher lateral capacity and minimum level of damage.
STRENGTHENING STRATEGY APPLIED FOR REINFORCED CONCRETE (RC) FRAME STRUCTURE USING STEEL BRACES AFTER LOMBOK EARTHQUAKE (CASE STUDY: PARKING-LOT OF MALL BALI GALERIA-MBG) Sutarja I.N; I Gede Adi Susila
Journal of International Conference Proceedings (JICP) Vol 2, No 1 (2019): Proceedings of the 3rd International Conference of Project Management (ICPM) Bal
Publisher : AIBPM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32535/jicp.v2i1.435

Abstract

Lombok Earthquake 2018 was very rare and interesting phenomenon to be taken into consideration due to its behavior. The pattern of seismicity was up and down which gives panic and confusion, especially to the public who live in Lombok, Bali and Sumbawa. There were at least six earthquakes with magnitudes of 5.5 to 6.9 ML in a short interval between 29th July to August 25, 2018. The earthquake caused structural damages in Lombok as well as in Bali region. The case study has been taken to cover 4-storey RC frame of MBG building which located in Kuta, Bali. Damage occurs on columns, beams. Beams and pre-printed reinforced concrete plates and reinforced concrete columns in place. Analysis has been applied into existing structure and stress ratio analysis check has also been taken in order to find failures. Overstresses has been found at the columns and beams, therefore, the strengthening is needs. Strengthening strategy using braces of Wide Flange-IWF, typically a cross bracing (X) method has been taken into account in order to find out the structural behavior as well as the performance level of building. Braces has been invoked for both: transverse and longitudinal directions of buildings and most of the beams and columns were reinforced by using Fiber. This strengthening has been done very nicely and the parking-lot building has been tested and it can be used regularly as it is.
Co-Authors Aditya Permana Putra Firman Hadi Suprapto I Gede Gegiranang Wiryadi I Gusti Agung Ananda Putra I Ketut Diartama Kubon Tubuh I Ketut Sudarsana I Ketut Sudarsana I Nyoman Sutarja I Wayan Prima Widiantara Ida Bagus Dharma Giri Luh Putu Eka Anggreni Made Sukrawa Naghi Sanjaya, I Made Dwira Sastraningsih, Ni Wayan Widiarsa, Ida Bagus Rai Yana, Anak Agung Gde Agung Yundari, Yundari