| Citation: |
LU Yan, XU Yu-hao, HAN Qing-hua, WANG Shu-yu. SEISMIC FRAGILITY ANALYSIS AND RESILIENCE EVALUATION OF GYMNASIUM[J]. Engineering Mechanics. DOI: 10.6052/j.issn.1000-4750.2023.09.0723
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China is one of the most earthquake-damaged countries in the world. As gymnasiums are often used as emergency shelters after earthquakes, evaluating their seismic resilience is significant. In this study, the analysis model of a gymnasium is established by SAP2000. The incremental dynamic analysis method is applied to analyze the fragility of reinforced concrete frames and spatial steel truss structures. According to the reliability theory of the series system, the failure probability of the gymnasium after different earthquake intensities is acquired. Proposed are the calculation method of repair cost and time based on expected value and standard deviation and, one building post-earthquake recovery model. Then the seismic resilience curves of gymnasium under various repair paths are established. The analysis results show that the main frame and the bearing connecting main frame and space truss are destroyed first, when the seismic intensity increases gradually. The repair time of structural members and stairs in each floor is longer. Except for the non-structural members connected to the roof, and the repair time of each floor increases with the increase of the height of the floor. When the seismic intensity increases, the function improvement and repair time of each floor in the building resilience curve do not change in the same proportion. Under the resource constraints, the building function improves the fastest when it is repaired as the repair efficiency is from high to low.w.
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