﻿ 地震安全性评价中时程强度包络函数的影响分析

# 地震安全性评价中时程强度包络函数的影响分析 Influence Analysis of Time History Envelope Function in Seismic Safety Evaluation

Abstract: The artificial seismic wave (normally using the earthquake acceleration time history) imitates non-stationary characteristic of seismic wave intensity via intensity envelope function, so it’s of important theoretical significance and actual application value for the influence analysis of time history envelope function in seismic safety evaluation. Intensity envelope function model includes single-peak shape and multi-peaks shape. The multi-peak shape intensity envelope function model can imitate non-stationary characteristic of seismic intensity simply and neatly, which is commonly used. This article researches on analysis of seismic response of soil layer through Huojun- rong Model and Mcguire Model of intensity envelope function. For long-periodic structure, it is suggested that response spectrum time history envelope function values in different control cycles should be calculated first, then iteration is used separately and finally acceleration time history is gotten. Acceleration time history (resulting in this method) considers large-magnitude and long-distance potential seismic source influence, and thus does not underestimate seismic movement of long-periodic structure causing adding energy. Zero drift in seismic movement time history is also an import problem in seismic wave synthesis, and otherwise result data of structure power time history are not trustworthy. Seismic movement time history can use multinomial amendment, and also can use smooth non-singular point intensity envelope function to solve this.

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