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Seismic fragility assessment of moment-resisting concrete frame with setback under repeated earthquake

Seismic fragility assessment of moment-resisting concrete frame with setback under repeated earthquake / Lau Ji Wei
Kajian penyelidikan ini dijalankan adalah untuk menganalisis tingkah laku seismik 10 jenis Bingkai Enam Tingkat Kerangka-Konkrit Penahan Momen (MRCFs) iaitu 1 bingkai tetap dan 9 bingkai “setback” dengan konfigurasi bangunan yang berbeza. Bangunan “setback” amat ditekankan dalam analisis ini kerana mereka menjadi semakin popular dalam pembinaan bangunan berbilang tingkat yang moden atas sebab fungsi seni bina dan estetik. Analisis Dinamik Tambahan (IDA) telah dijalankan pada bingkai tersebut bersamaan dengan tiga set rekod pergerakan tanah berulang. Berdasarkan keluk IDA, tahap prestasi keselamatan nyawa (LS) akan dianggap sebagai garis panduan utama untuk membangunkan lengkung kerapuhan. Peratusan drift maksimum antara tingkat pada setiap tingkat untuk semua bingkai dan lokasi plastik engsel bagi setiap bingkai boleh ditentukan dengan jelas melalui IDA. Berdasarkan keluk IDA, min dan sisihan piawai untuk puncak pecutan bumi (PGA) pada drift 1.5% bagi bingkai ditentukan dalam usaha untuk membangunkan lengkung kerapuhan dengan tahap prestasi keselamatan nyawa. Daripada hasil keluk kerapuhan, kebarangkalian mencapai atau melebihi tahap prestasi keselamatan nyawa boleh ditentukan. Rangka tetap menunjukkan kebarangkalian yang paling rendah berbanding dengan bingkai lain. Seperti yang diramalkan, ia mempunyai prestasi seismik yang lebih baik berbanding dengan bingkai lain. Antara bingkai “setback”, Model 6T 6 menunjukkan kebarangkalian tertinggi dalam mencapai atau melebihi tahap prestasi keselamatan nyawa manakala Model 6T 3 menunjukan kebarangkalian terrendah di bawah sebarang nilai PGA. Oleh itu, Model 6T 3 mempunyai prestasi seismik yang terbaik manakala Model 6T 6 mempunyai prestasi seismik yang buruk. Maka, dapat diketahui bahawa konfigurasi bangunan bingkai mengawal prestasi seismik bangunan dan dengan itu ia perlu diambil kira dalam reka bentuk bangunan seismik. _______________________________________________________________________________________________________ This research study is carried out to analyse the seismic behaviour of 10 types six-storey Moment-Resisting Concrete Frames (MRCFs), namely 1 regular frame and 9 setback frames with different building configurations. The setback buildings were mainly emphasised in this analysis because they are becoming increasingly popular in modern multi-storey building construction due to its functional and aesthetic architecture. Incremental Dynamics Analysis(IDA) have been performed on these frames under three sets of repeated ground motion records. Based on the IDA curve, the Life Safety (LS) performance level will be considered as main guideline in order to develop the fragility curve. The maximum inter-story drift percentages at each story level for all the frames and the location of the plastic hinges for each frames can also be determined clearly through IDA. Based on the IDA curve plotted, the mean and standard deviation of the Peak Ground Acceleration (PGA) at drift 1.5% for the frames were determined in order to develop the fragility curve with the life safety performance level. From the results of the fragility curves, the probability of reaching or exceeding the life safety performance state can be determined. The regular frame showed the lowest probability compared to the other frames. As predicted, it has the better seismic performance as compared to the other frames. Among the setback frames, the Model 6T 6 recorded the highest probability of reaching or exceeding the life safety performance level while Model 6T 3 recorded the lowest probability of reaching or exceeding the life safety performance level under any PGA values. Thus, the Model 6T 3 has the best seismic performance while the Model 6T 6 has the poor seismic performance. Thus, it can be known that the building configuration of the frames governs the seismic performance of the building and thus it should be taken into consideration in the building seismic design
Contributor(s):
Lau Ji Wei - Author
Primary Item Type:
Final Year Project
Identifiers:
Barcode : 00003106749
Accession Number : 875006873
Language:
English
Subject Keywords:
seismic behaviour; MRCFs; fragility curve
First presented to the public:
6/1/2017
Original Publication Date:
3/21/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Civil Engineering
Citation:
Extents:
Number of Pages - 116
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-21 15:06:33.523
Date Last Updated
2020-06-01 15:43:31.564
Submitter:
Mohd Jasnizam Mohd Salleh

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