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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

This research evaluated the effect of connectionâ€™s rigidity zone factors of RCS frameâ€™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 elementsâ€™ 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

PERILAKU DAN KINERJA STRUKTUR RANGKA BAJA DENGAN DINDING PENGISI DAN TANPA DINDING PENGISI Ida Bagus Dharma Giri; I Gede Adi Susila; Firman Hadi Suprapto
Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil, Vol. 20, No. 1, Januari 2016
Publisher : Department of Civil Engineering, Udayana University

Penelitian tentang perilaku dan kinerja struktur rangka baja dengan dinding pengisi dan tanpa dinding pengisi menggunakan aplikasi SAP 2000 v17 dengan model open frame sebagai acuan perbandingan. Penelitian struktur dilakukan pada model dinding pengisi penuh tanpa meninjau adanya bukaaan. Kinerja struktur dinding pengisi akan dilakukan pada model strut diagonal.Analisis dilakukan dengan memodel 3 struktur, yaitu: model 1 Model Open Frame (MOF), model 2 Model Strut Diagonal (MSD), dan model 3 Model Shell Elemen (MSE). Ketiga model struktur dibebani dan dirancang berdasarkan pedoman perencanaan SNI 03-2847-2002 (Beton) dan SNI 03-1729-2015 (Baja). Untuk model validasi akan dianalisis secara linier dengan penurunan nilai elastisitas pada material dinding, material balok dan kolom. Kinerja struktur bangunan open frame dan struktur dinding pengisi yang dimodel dengan strut diagonal akan dianalisis secara nonlinier.Dari hasil analisis didapatkan hasil bahwa perilaku model open frame memiliki simpangan 46,21 mm, model dinding pengisi dengan strut diagonal memiliki simpangan 8,99 mm dan model dinding pengisi dengan shell elemen memiliki simpangan 15,97 mm. Gaya-gaya dalam yang bekerja baik model strut diagonal atau model shell elemen memiliki nilai yang lebih kecil dari pada gaya-gaya dalam yang bekerja pada model open frame kecuali gaya aksial kolom yang memiliki nilai yang hampir sama dengan model open frame. Perbandingan kinerja dengan struktur dinding pengisi dengan model strut diagonal memiliki kinerja yang lebih baik dari pada model open frame dengan besar nilai batas perpindahan untuk model open frame sebeser 1.039,556 mm dengan gaya geser sebesar 4213,15 kN, sedangkan nilai batas perpindahan untuk model strut daigonal sebesar 701,84 mm dengan nilai gaya geser sebesar 8.146,6 kN. Sedangkan untuk nilai daktilitas model open frame sebesar 5,93 sedangkan untuk gedung yang dimodel dengan strut diagonal memiliki nilai daktilitas sebesar 4,15.

KINERJA STRUKTUR RANGKA BETON BERTULANG DENGAN PERKUATAN PELAT BAJA DAN PROFIL SIKU PADA KOLOM DARI GEDUNG PERKANTORAN 5 TINGKAT I Ketut Sudarsana; I Gede Adi Susila; Luh Putu Eka Anggreni
Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil, Vol. 23, No. 1, Januari 2019
Publisher : Department of Civil Engineering, Udayana University

Perkuatan kolom dengan penambahan tulangan ekternal berupa pelat baja atau profil siku diperlukan untuk meningkat kapasitas nominal dari kolom dan juga daktilitasnya. Penelitian ini dilakukan untuk mengetahui kinerja struktur beton bertulang dengan perkuatan kolom dengan kombinasi pelat baja penuh dan profil siku pada bagian end span dan perkuatan profil siku pada bagian mid span. Enam buah model struktur gedung lima tingkat dengan denah beraturan dianalisis yaitu Model ME adalah model struktur eksisting tanpa perkuatan, M1, M2, M3, M4 dan M5 adalah model struktur eksisting (ME) yang diperkuat pada seluruh kolom di lantai 1, lantai 1 dan 2, lantai 1 sampai dengan 3, lantai 1 sampai 4, dan lantai 1 sampai 5 diperkuat. Denah struktur dibuat tipikal pada semua tingkat, terdiri dari 3 bentang arah X dan Y dengan panjang bentang sebesar 7,5 m dan tinggi tiap lantainya sebesar 4 m. Fungsi bangunan berupa perkantoran yang berada di wilayah dengan kelas situs D dengan kondisi tanah sedang. Pemodelan dan analisis pushover semua model struktur dilakukan dengan bantuan program SAP2000 ver.20 untuk mengetahui level kinerja struktur. Evaluasi kinerja struktur berdasarkan FEMA 440 Displacement modification. Hasil yang diperoleh adalah simpangan yang terjadi pada seluruh model akibat beban gempa telah memenuhi persyaratan simpangan ijin. Gaya geser dasar, kekakuan, dan daktilitas semua model struktur dibandingkan dengan model ME diperoleh perkuatan pada kolom dapat meningkatkan gaya geser pada model M1, M2, M3, M4 dan M5 masing-masing sebesar 4%, 7%, 8%, 13%, dan 14% untuk sumbu X dan sebesar 8%, 7%, 13%, 13%, dan 15% untuk sumbu Y. Perpindahan yang ditargetkan berdasarkan FEMA 440 paling besar terjadi pada model M1, diikuti oleh ME, M4, M5, M2, dan M3. Level kinerja struktur arah X dan arah Y untuk seluruh model berdasarkan target perpindahan FEMA 440 memiliki level kinerja beyond to E (failure). Selain itu, kekakuan struktur meningkat sebesar 11% sampai dengan 27% untuk seluruh model. Daktilitas terbesar dihasilkan oleh M4 pada arah X yaitu sebesar 7,41, sedangkan pada arah Y daktilitas terbesar terjadi pada M5 sebesar 7.66.

WIND LOAD PREDICTING; HOW COULD CFD REPLACED WIND TUNNEL TEST I Gede Adi Susila
Jurnal Ilmiah Teknik Sipil Vol. 13, No. 1 Januari 2009
Publisher : Department of Civil Engineering, Udayana University

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Computational Fluidal Dynamic (CFD analysis) is highly pointed tosolve a number of wind tunnel test problem on the computer simulation. Largeeddysimulation (LES) technique with the Smagorinsky eddy-viscosity model hasbeen applied in order to predict pressure coefficients for 3-D domes and catenoidmodels.“Fluent” has been used to analyze the flows. Published data of Maher and theASCE have been used as the basis guideline to enable wind loading to be appliedappropriately. Result of LES computations are compared with those from laminarmodels as well as those from turbulent models based on Reynolds–average Navier-Stokes equation (RANS model) and those from experiment. The numericalexperiment results for all models with various configurations to be exited by theturbulent wind forces were identified. The LES results from 3D computationalagreed very well with the experimental or published data. For the dome case ofh/d=1/2 ratio, the result can be sort it out into the maximum positive Cp=+0.621and the maximum negative in the centre of dome is Cp = -1.2. The coefficientoffered was quite similar to the published data of Cp=+0.6 and Cp=-1.0,respectively.CFD has been shown to a reasonable prediction of wind pressure distributions. Itconceivably could replace some wind tunnel tests.

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

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

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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

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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

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

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.

EVALUASI KINERJA STRUKTUR RANGKA BETON BERTULANG BALOK LEBAR DENGAN DISTRIBUSI BEBAN PELAT SATU DAN DUA ARAH I Ketut Sudarsana; Gede Adi Susila; I Wayan Prima Widiantara; I Gede Gegiranang Wiryadi
Jurnal Ilmiah Teknik Sipil Vol 27 No 1 (2023): Jurnal Ilmiah Teknik Sipil, Vol. 27 No. 1, Maret 2023
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2023.v27.i01.p15

Sistem struktur rangka gedung beton berttulang menggunakan balok lebar menjadi solusi pada bangunan dengan keterbatasan ketinggian untuk mendapatkan jumlah tingkat yang lebih banyak, jarak antar tingkat lebih tinggi dan keleluasaan dalam instalasi elemen arsitektur dan MEP. Kajian analisis ini dilakukan untuk mengevaluasi perilaku dan kinerja struktur rangka terbuka dengan balok lebar untuk kondisi sistem pelat satu arah dan dua arah. Studi ini dilakukan dengan menerapkan analisis linier dan nonlinier menggunakan program analisis struktur terhadap empat buah model struktur lima tingkat dengan kolom persegi, yang bervariasi pada dimensi balok dan sistem pelatnya. Adapun variasi yang ditinjau adalah balok normal dengan sistem pelat satu arah (1wSN), balok normal dengan sistem pelat dua arah (2wSN), balok lebar dengan sistem pelat satu arah (1wSW), dan balok lebar dengan sistem pelat dua arah (2wSW). Semua elemen struktur didesain mengikuti dan memenuhi kriteria dari peraturan yang berlaku, kemudian dilanjutkan dengan analisis beban dorong statik non-linear untuk mendapatkan kinerja masing-masing model struktur. Hasil analisis menunjukkan bahwa struktur dengan balok lebar memiliki deformasi yang lebih besar dibandingkan struktur dengan balok normal dengan pencapaian kondisi runtuh lebih cepat sehingga daktilitas strukturnya juga menjadi lebih rendah. Hal ini disebabkan oleh kekakuan join balok-kolom struktur dengan balok lebar lebih rendah dari strutkur dengan balok normal. Penggunaan sistem pelat satu arah maupun dua arah pada strutkur dengan balok lebar tidak memberikan pengaruh yang signifikan.

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