CAV seismic hazard analysis for Taiwan

• Main Authors: Pei-En Chiang, 江沛恩
• Other Authors: Jui-Pin Wang
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/2tmjc6

碩士 === 國立中央大學 === 土木工程學系 === 107 === Taiwan is located in the Circum-Pacific seismic belt, typical continental edge islands produced by plate collisions. Earthquakes caused many economic losses and casualties. Thus, the seismic hazard analysis is important to Taiwan. Cumulative absolute velocity (CAV) is a relatively new ground motion intensity measure considering a motion’s amplitude, duration and waveform, which is considered more indicative of structure damage than PGA (peak ground acceleration). However, current seismic hazard assessments are still PGA-based. This study presents a new CAV-based seismic hazard assessment for Taiwan, and provides two CAV hazard maps in association with 2% and 10% occurrence probabilities in 50 years. The result shows that Central and Eastern Taiwan are subject to a greater CAV seismic hazard compared to the rest areas of Taiwan, and at the level of 10% occurrence probability in 50 years, the CAV hazard is close to 1.6 g-s. Based on the calculated PGA and CAV seismic hazards, this paper also presents four Design Earthquake (10% exceedance probabilities within the next 50 years, return period = 475 years) ground motions for structure performance-based design for Taipei areas, which is compulsory in Taiwan.