• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 57 Issue 1
Feb.  2022
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Article Contents
CHEN Longwei, WU Xiaoyang, TANG Chuan. Simplified Prediction Method for PGA Amplification Factors Corrected by Site Conditions[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 173-181. doi: 10.3969/j.issn.0258-2724.20200508
Citation: CHEN Longwei, WU Xiaoyang, TANG Chuan. Simplified Prediction Method for PGA Amplification Factors Corrected by Site Conditions[J]. Journal of Southwest Jiaotong University, 2022, 57(1): 173-181. doi: 10.3969/j.issn.0258-2724.20200508

Simplified Prediction Method for PGA Amplification Factors Corrected by Site Conditions

doi: 10.3969/j.issn.0258-2724.20200508
  • Received Date: 04 Aug 2020
  • Rev Recd Date: 25 Nov 2020
  • Available Online: 25 Dec 2020
  • Publish Date: 25 Dec 2020
  • Peak ground-motion acceleration (PGA) directly reflects ground shaking intensity with the advantages in conceptual clarity and engineering application. Prediction of PGA, along with site condition correction, needs to be handled in site-specific seismic design. In this work, 32 stations and the earthquake data recorded are collected from the KiK-net strong motion array, Japan, so as to propose a simplified method to predict PGA amplification factors (fPGA) corrected by site condition. Linear and quadratic empirical formulae of the fPGA possibility model parameters with respect to the combinations of site characteristic parameters are obtained via regression analysis. Using the fPGA model, ground surface PGA values, corrected by site conditions, can be predicted under different exceedance probability levels. Data analysis indicates that fPGA is variable but can be simulated by a log-normally distributed function, of which mean and standard deviation are less correlated with a single site characteristic parameter but have good correlation with the linear combinations of the site characteristic parameters. The reasonable agreement between the predictions and records testifies the feasibility of the proposed method.

     

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