Probabilistic assessment of seismic performance and collapse risk for mid-rise buildings

• Main Authors: Wei-HuanHsieh, 謝瑋桓
• Other Authors: Lyan-Ywan Lu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/84sf48

碩士 === 國立成功大學 === 土木工程學系 === 105 === The casualty risk and social impact caused by the collapse of these buildings should not be underestimated. Furthermore, if mid-rise buildings of critical facilities, e.g. hospital, high-tech factory etc., were damaged during earthquakes will also cause great economic loss. Therefore, developing suitable assessment methods to identify seismic performance levels and collapse risk of these buildings become a critical issue. Even though traditional seismic assessment methods, which usually employ the nonlinear static pushover analysis, have been successfully applied to regular low-rise buildings, these methods are unable to reflect higher-mode effect on the responses of mid-rise buildings. Furthermore, a traditional approach usually leads to a deterministic result that could not account for the uncertainty in seismic motions and structural responses of a mid-rise building, which is usually more complicated and involves more structural uncertainties than a low-rise building. For this reason, this paper presents a procedure to assess the risk of collapse and various seismic performance levels for mid-rise buildings based on the methodology proposed by FEMA P-58 and also acceptance criteria suggested in ASCE 41-13 and FEMA 356. To establish the fragility curves, this approach employs nonlinear time history analysis together with the method of incremental dynamic analysis (IDA) to estimate structural response parameters. For demonstration, the proposed approach is applied to assess the seismic risk of a mid-rise building that collapsed in the Meinong earthquake (2016) for various performance levels. In addition, the collapse risk of the building was assessed by using the proposed method and then compared with the observation in the Meinong earthquake.