scholarly journals EVALUASI STRUKTUR GEDUNG DUAL SYSTEM DENGAN DINDING GESER BERSAYAP C MENGGUNAKAN PUSHOVER ANALYSIS

2020 ◽  
Vol 3 (4) ◽  
pp. 1233
Author(s):  
Albert Albert ◽  
Daniel Christianto ◽  
Hadi Pranata
Keyword(s):  
Line Element ◽  
Pushover Analysis ◽  
Safety Performance ◽  
Life Safety ◽  
Target Displacement ◽  
Uniform Load ◽  
Load Pattern ◽  
Fema 356 ◽  
Strength And Stiffness ◽  
Equivalent Strength

ABSTRACTAlthough elastic analysis gives a good indication of the elastic capacity and behavior of a building, but the elastic method can’t predict when the first yield will occur, and the failure mechanism and account for redistribution of member forces when the plastic hinges progressively formed. The use of inelastic procedure for evaluation is an attempt made by engineer in the past days to better understand how the structure will behave when subjected to strong earthquake, assuming the elastic capacity of the structure will be exceeded. In this research the pushover analysis was done using the modelling criteria of FEMA 356. The modeling of C-flanged shear was done using line element with the equivalent strength and stiffness properties. Target displacement was calculated using the displacement coefficient method of FEMA 356. Based on the analysis the triangular load pattern resulted in larger target displacement than the uniform load. But the uniform load pattern gives larger seismic response than the triangular load pattern. The uniform load pattern resulted in Life Safety performance level, while the triangular load pattern resulted in Immediate Occupancy, based on the two load patterns used the structure resulted in Life Safety performance level.ABSTRAKWalaupun analisis elastik memberikan indikasi yang baik mengenai kapasitas dan perilaku elastik dari suatu gedung, tetapi metode elastik tidak dapat memperkirakan kapan pelelehan pertama terjadi, serta mekanisme kegagalan apa yang mungkin terjadi pada bangunan tersebut, dan memperkirakan redistribusi dari gaya- gaya dalam ketika pembentukan sendi plastis secara progresif terjadi. Fungsi dari analisis inelastik, sebagai prosedur untuk mengevaluasi bangunan, yang merupakan usaha dari insinyur-insinyur terdahulu memahami bagaimana struktur akan berperilaku apabila dikenai gempa kuat, dimana diasumsikan bahwa kapasitas elastik gedung telah terlampaui. Dalam penelitian ini dilakukan pushover analysis menggunakan kriteria pemodelan berdasarkan FEMA 356. Pemodelan dari dinding geser bersayap C dilakukan menggunakan line element dengan kekuatan dan kekakuan yang ekivalen. Target perpindahan dianalisis menggunakan metode coefficient of displacement dari FEMA 356. Berdasarkan analisis yang dilakukan didapat bahwa pembebanan segitiga lebih besar dibandingkan pembebanan merata. Namun, respons seismik yang didapat akibat beban merata, lebih besar dibandingkan beban segitiga. Pembebanan merata menghasilkan tingkatan kinerja Life Safety, sedangkan pembebanan segitiga menghasilkan tingkatan kinerja Immadiate Occupancy, berdasarkan kedua pembebanan tersebut didapat kinerja dari struktur tersebut adalah Life Safety.

scholarly journals Evaluasi Kinerja Struktur Gedung Rumah Sakit Paru Sumatera Barat dengan Pushover Analysis

2019 ◽  
pp. 1-9
Author(s):  
Nugrafindo Yanto ◽  
Rafki Imani ◽  
Zulva Andika
Keyword(s):  
Emergency Management ◽  
Pushover Analysis ◽  
Federal Emergency Management Agency ◽  
Life Safety ◽  
Target Displacement ◽  
Management Agency ◽  
Fema 356 ◽  
Immediate Occupancy

Sumatera Barat merupakan daerah yang rawan terhadap gempa bumi. Bencana gempa menyebabkan terjadinya kerusakan struktur bangunan. Saat terjadi gempa, diharapkan bangunan mampu menerima gaya gempa pada level tertentu tanpa terjadi kerusakan yang signifikan pada strukturnya atau apabila struktur bangunan harus mengalami keruntuhan mampu memberikan perilaku nonlinier pada kondisi pasca-elastik sehingga tingkat keamanan bangunan terhadap gempa dan keselamatan jiwa penghuninya lebih terjamin. Melihat dari fenomena gempa bumi yang telah terjadi belakangan ini, maka sangat perlu diperiksa atau dianalisis kelayakan dari Gedung Rumah Sakit Paru Sumatera Barat. Metode evaluasi yang digunakan adalah analisis statik non-linier (Pushover). Beban lateral yang digunakan merupakan hasil dari anaisis statik ekuivalen. Level kinerja ditentukan dengan Target Perpindahan sesuai Federal Emergency Management Agency. Hasil penelitian menunjukkan bahwa Tingkat kinerja Struktur Rumah Sakit Paru Sumatera Barat tersebut adalah dalam kondisi IO-LS (Immediate occupancy–Life Safety) yang artinya tidak ada kerusakan pada komponen struktur dan struktur bisa digunakan, hal ini berdasarkan target displacement FEMA 356, dan pola keruntuhan pada Struktur Rumah Sakit Paru Sumatera Barat, elemen struktur yang lemah (terjadisendi plastis) adalah elemen balok.

Procedural Assumption Comparison for Old Buildings via Pushover Analysis Including the ASCE 41 Update

2010 ◽  
Vol 26 (1) ◽  
pp. 187-208 ◽  
Author(s):  
Georgios Siahos ◽  
Stephanos Dritsos
Keyword(s):  
Plastic Hinge ◽  
Pushover Analysis ◽  
Performance Level ◽  
Safety Performance ◽  
Rc Buildings ◽  
Dynamic Analyses ◽  
Fema 356 ◽  
Nonlinear Dynamic Analyses ◽  
Seismic Tests ◽  
Story Building

The two different procedures of ASCE/SEI 41 Supplement 1 and the EC 8 based Greek Retrofitting Code (GRECO) are compared via pushover analyses for the seismic assessment of RC buildings designed to old codes. In addition, the FEMA 356 procedure is considered in order to evaluate the new provisions of ASCE/SEI 41. Results from two moderate level seismic tests performed on a four-story building are used for comparison. For the first test, all procedures overestimated the experimentally observed limited damage but GRECO was more satisfactory. For the second higher excitation test, all procedures predicted the building's high vulnerability but failed to predict the experimentally observed imminent collapse of a stiff column. In all cases, GRECO gave higher displacements. ASCE/SEI 41 and FEMA 356 predicted better the building's stiffness and gave much higher available plastic hinge rotations for beams when compared to GRECO. Concerning the columns, available plastic hinge rotations at the Life Safety performance level from the ASCE procedure were higher than GRECO, while ASCE values at the collapse prevention performance level were slightly lower than GRECO. Finally, a comparison of the above procedures with nonlinear dynamic analyses of a past earthquake is performed to identify potential pushover analysis concerns.

scholarly journals Variability and Accuracy of Target Displacement from Nonlinear Static Procedures

2011 ◽  
Vol 2011 ◽  
pp. 1-16 ◽  
Author(s):  
Rakesh K. Goel
Keyword(s):  
Nonlinear Models ◽  
Pushover Analysis ◽  
Engineering Practice ◽  
Target Displacement ◽  
Engineering Profession ◽  
Short Period ◽  
Modeling Techniques ◽  
Nonlinear Static ◽  
Fema 356 ◽  
Insight Into

This paper compares the target displacement estimate from four current nonlinear static procedures—FEMA-356 CM, ASCE-41 CM, ATC-40 CSM, and FEMA-440 CSM—with the value derived from recorded motions of five strongly shaken reinforced concrete buildings.This comparison provides useful insight into two important questions: (1) how much does the target displacement vary among the four nonlinear static procedures? and (2) can the engineering profession “accurately” predict the response of a real building during an earthquake event using currently available modeling techniques and pushover analysis procedures? It is shown that these procedures may lead to significantly different estimates of the target displacement, particularly for short-period buildings responding in the nonlinear range. Furthermore, various nonlinear static procedures applied to nonlinear models developed using generally accepted engineering practice provide either significant over estimation or under estimation of the target roof displacement when compared to the value derived from recorded motions.

scholarly journals EVALUASI KINERJA STRUKTUR BANGUNAN MENGGUNAKAN PUSHOVER ANALYSIS DENGAN METODE ATC-40 DAN FEMA 356

Jurnal PenSil ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 40-46
Author(s):  
R. Hendarto Prasetyo R. Bambang Kusuma Prihadi ◽  
Dwi Kurniati ◽  
Bambang Kusuma Prihadi
Keyword(s):  
Lateral Displacement ◽  
Response Spectrum ◽  
Pushover Analysis ◽  
Performance Level ◽  
Performance Point ◽  
Drift Ratio ◽  
Load Pattern ◽  
Fema 356 ◽  
Immediate Occupancy ◽  
Collapse Behavior

Pushover analysis is a non-linear static analysis to determine the collapse behavior of a building or structure. The analysis is carried out by giving a static lateral load pattern to the structure, which is then gradually increased by a multiplier until a buliding movement target is reached. This final assignment research was conducted to determine the performance point based on ATC-40, to determine the performance level based on ATC-40, and to determine the performance level based on FEMA 356. The research method used the response spectrum with the SAP2000 v14 program. The result of the performance point in building with the values of Sa = 0,737, and Sd = 0,200 for the push X, while the values of push Y Sa = 0,680, and Sd = 0,225. The calculation of ATC-40 in building shows the value of the drift ratio in the X direction 0,01165 and the drift ratio Y direction 0,0127 at the level of performance Immediate Occupancy (IO). The result of FEMA 356 calculation in building shows the value of the lateral displacement target structure of the X direction structure = 0,00437 (0,437 %), and the value of the lateral displacement target of the Y direction structure = 0,006 (0,6 %) and at the level of performance Immediate Occupancy (IO). Then it could be concluded that The Dental & Mouth Hospital of UGM Prof. Soedomo, was at the level of performance Immediate Occupancy (IO), meaning that the building was still safe and could be reused after the earthquake and don’t occured serious demage.

scholarly journals EVALUASI KINERJA STRUKTUR GEDUNG BETON BERTULANG METODE PUSHOVER ANALYSIS

2020 ◽  
Vol 12 (2) ◽  
pp. 104-109
Author(s):  
Junaidin Aswar
Keyword(s):  
Pushover Analysis ◽  
Fema 356 ◽  
Immediate Occupancy

      Quest Hotel yang terletak di Yogyakarta merupakan bangunan tempat tinggal yang di peruntukan untuk para pengunjung wisata maupun orang-orang yang punya kepentingan lain yang datang di Yogyakarta, bangunan ini merupakan bangunan bertingkat 10 lantai serta memiliki ketinggian 33,45 m. Sebuah struktur bangunan harus direncanakan sesuai dengan kaidah-kaidah perencanaan yang berlaku, sehingga dampak yang disebabkan oleh gempa dapat menahan guncangan yang telah direncanakan. Penelitian ini dilakukan dengan tujuan untuk mengetahui nilai gaya lateral maksimal serta displacement yang terjadi pada gedung dan bagaimana level kinerja berdasarkan metode FEMA 356. Besarnya  gaya lateral maksimum pada arah x = 8034,753 kN pada step 9 dengan displacement sebesar -0,042530 m dan pada arah y gaya lateral maksimum = 7055,847 kN pada step 7 dengan displacement sebesar -0,066046 m. Hal ini menunjukan bahwa struktur gedung lebih kuat menahan gaya lateral dari arah-x dibandingkan dari arah-y. Berdasarkan hasil perhitungan analisis static non-linier, dari nilai target perpindahan maka diperoleh nilai drift aktual arah-x = 0,00484 (0,484%) dan nilai drift actual arah-y = 0,00773 (0,73%). Hal ini menunjukkan bahwa bangunan tidak mengalami kerusakan komponen struktur. Kekuatan dan kekakuan gedung masih hampir sama dengan kondisi sebelum struktur dilanda gempa,  pada keadaan ini gedung yang ditinjau adalah termasuk  pada level kinerja Immediate Occupancy (IO). Kata Kunci: Displacement, FEMA 356, Pushover, Quest Hotel.

EVALUASI STRUKTUR BANGUNAN HOTEL AMBARRUKMO PADA KONDISI SEBELUM DAN SETELAH RETROFIT TERHADAP PETA GEMPA 2010

CivETech ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 63-76
Author(s):  
Fajar Purwoko
Keyword(s):  
Life Safety ◽  
Drift Ratio ◽  
Non Linear ◽  
Fema 356

Wilayah Yogyakarta yang termasuk dalam zonasi gempa 3 sesuai dengan SNI 03-1726-2002 dengan percepatan puncak batuan mencapai 0,15g pada kala ulang 500 tahun telah dirubah menjadi 0,3g-0,4g sesuai dengan Peta Zonasi Gempa 2010 untuk probabilitas terlampaui sebesar 10% dalam 50 tahun (kala ulang 475 tahun), sehingga kerentanan atau resiko terhadap kerusakan bangunan akibat gempa menjadi lebih besar. Evaluasi dilakukan dengan 2 tahap yaitu linier dan non linier analysis dalam 3 kondisi (normal, retak, dan retrofit) dengan kala ulang gempa 72, 475, dan 2475 tahun, dari analisis linear didapatkan kapasitas balok-kolom dan drift ratio bangunan, sedangkan analisis non linear menghasilkan kinerja bangunan tersebut. Hasil analisis liniear memberikan kesimpulan bahwa kapasitas frame dan drift ratio masih memenuhi syarat untuk semua kondisi, sedangkan pada analisis non-linear yang dilakukan dengan 2 metode (ATC-40 & FEMA-356) memberikan hasil yang berbeda pada metode FEMA 356 pada gempa 2475 tahun dengan kondisi beberapa bagian bangunan mengalami retak kinerja bangunan yaitu D (>Collapse) sedangkan setelah di retrofit kinerja bangunan dapat mencapai Life Safety, hal ini menunjukkan retrofit berupa CFRP akan memberikan kinerja yang lebih baik, namun pemasangannya harus dilaksanakan dengan benar

Optimization of modal load pattern for pushover analysis of building structures

2013 ◽  
Vol 47 (1) ◽  
pp. 119-129 ◽  
Author(s):  
Mohsen Ali Shayanfar ◽  
Mansoor Ashoory ◽  
Taha Bakhshpoori ◽  
Basir Farhadi
Keyword(s):  
Pushover Analysis ◽  
Building Structures ◽  
Load Pattern

Convex Model for a New Lateral Load Pattern of Pushover Analysis

2011 ◽  
Vol 243-249 ◽  
pp. 4013-4016
Author(s):  
Li Zhe Jia ◽  
Zhong Dong Duan
Keyword(s):  
Response Spectrum ◽  
Pushover Analysis ◽  
Fundamental Equation ◽  
Lateral Load ◽  
Seismic Load ◽  
Influence Coefficient ◽  
Convex Model ◽  
Load Pattern ◽  
Relationship Of ◽  
Strong Ground

The uncertainties of earthquake currently were not considered with the various lateral load patterns of pushover. The convex set theory, which requires much less information, is employed to model the uncertainties of the seismic influence coefficient maximum and the characteristic period of response spectrum. Then the convex analysis method is integrated into the fundamental equation of pushover, and the analytic relationship of lateral seismic load and top displacement of buildings is derived. The results of numerical example shows that the new lateral load pattern of pushover proposed in this research may effective simulate the uncertainties of strong ground motion.

Extreme Modal Combinations for Pushover Analysis of RC Buildings

2013 ◽  
Vol 553 ◽  
pp. 117-124
Author(s):  
Ante Mihanović ◽  
Boris Trogrlić ◽  
Ivan Balić
Keyword(s):  
Limit State ◽  
Pushover Analysis ◽  
Mode Shapes ◽  
Eurocode 8 ◽  
Elastic Model ◽  
Seismic Action ◽  
Target Displacement ◽  
Ground Acceleration ◽  
Higher Modes ◽  
Practical Procedure

The pushover method is a practical procedure for comprehensive nonlinear analysis of structures subjected to seismic action. Application of this method, in accordance with the Eurocode 8 rules and due to engineering simplicity, favours application utilizing the first mode. The aim of the presented research in this paper was to find the influence of multi modal combinations in assessing the bearing capacity of reinforced concrete (RC) frames and walls. This paper presents a procedure in which the most extreme state is defined by the lowest ground acceleration caused by a predetermined shape of an elastic spectrum. The extreme bearing value is obtained by the envelope principle. Mode shapes and period sizes are determined on a linear elastic model while the limit state of the load bearing system is evaluated in a nonlinear state of structures. Results of the analysis show that influences of higher modes are significantly higher and that the safety/reliability, indicated by the criteria for the target displacement, in accordance with Eurocode 8 (Annex B), is not achieved. Inclusion of higher modes, in some presented examples, decreases the peak ground acceleration by more than two times, which is significantly less favourable than the target displacement criteria.

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