Simulation of the records of the 27 March 2013 Nantou Taiwan earthquake using modified semi-empirical approach

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• 作者：A. Joshi ; Chun-Hsiang Kuo ; Piu Dhibar ; Sandeep ; M. L. Sharma…
• 关键词：Strong ground motion ; Semi ; empirical ; Nantou earthquake ; Strong motion generation areas
• 刊名：Natural Hazards
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：78
• 期：2
• 页码：995-1020
• 全文大小：2,765 KB
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• 作者单位：A. Joshi (1)
  Chun-Hsiang Kuo (2)
  Piu Dhibar (1)
  Sandeep (1)
  M. L. Sharma (3)
  Kuo-Liang Wen (4)
  Che-Min Lin (2)
  
  1. Department of Earth Sciences, Indian Institute Technology Roorkee, Roorkee, India
  2. National Center for Research on Earthquake Engineering, Taipei, Taiwan
  3. Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee, India
  4. Department of Earth Sciences, National Central University, Taoyuan, Taiwan
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Hydrogeology
  Geophysics and Geodesy
  Geotechnical Engineering
  Civil Engineering
  Environmental Management
  
• 出版者：Springer Netherlands
• ISSN：1573-0840

文摘

It is seen that strong motion generation area plays an important role in the shaping of strong motion records at the observation point. Strong motion generation areas identified within the rupture plane of the 27 March 2013 Nantou, Taiwan, earthquake (M w?=?5.9) have been modelled in this work. It is seen that all available records are at the surface which include site amplification terms. The modified semi-empirical technique effectively simulates records at rock site. The site amplification terms in all records have been removed using SHAKE 91 program and velocity input at each site. The observed records corrected for site amplification terms are further used for comparison with simulated record at the bedrock from several models. Once the observed records at soil sites are transferred at the bedrock, the next task is selection of final model that gives best fit records. Peak ground acceleration from simulated record at four sites is compared with that from corrected observed data. Since the semi-empirical technique of simulation is strongly dependent on various modelling parameters such as dip, strike, rake, rupture velocity and starting points of rupture, these parameters change iteratively in a specified range in a heuristic way to obtain best modelling parameters. The model giving minimum root mean square error (RMSE) is retained at final model. It is seen that minimum root mean square error of the wave form comparison has been obtained at four stations for the source model having single strong motion generation area. Strong motion records have been simulated at four different recording stations. Comparison of observed and simulated records has been made in terms of RMSE between simulated and observed acceleration records, velocity records and the response spectra at each of four stations. Comparison of waveforms and parameters extracted from observed and simulated records confirms the efficacy of the modified technique to model earthquake characterized by SMGAs.