Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (10): 110-116,124.doi: 10.3969/j.issn.1000-565X.2016.10.016

• Architecture & Civil Engineering • Previous Articles     Next Articles

Sensitivity Analysis of Non-Stationary Random Seismic Response Based on Time-Domain Explicit Method

LI Xue-ping LI Dong-hong SU Cheng WEI Peng   

  1. School of Civil Engineering and Transportation∥State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2015-10-19 Revised:2016-05-04 Online:2016-10-25 Published:2016-09-01
  • Contact: 魏鹏(1978-)，男，博士，副教授，主要从事结构优化方法研究． E-mail:ctpwei@scut.edu.cn
  • About author:李雪平(1978-)，男，博士，副研究员，主要从事结构振动、控制、优化与系统可靠度分析研究． E-mail:xueping@scut． edu． cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(11002056，11372004)

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Abstract:

In this paper,two time-domain explicit expressions of the non-stationary random seismic response sensi- tivity are derived respectively based on the precise integration format and the Newmark-β integral format,and they are respectively used to analyze the sensitivity of a plane frame and a plane truss structure.Then,the effects of the integral time step on the calculation accuracy and the efficiency of the two integral formats are investigated.It is found that,when the main frequency of the structure is within the range of the main load frequency,the time-do- main explicit expression based on the precise integration has a higher efficiency with the same accuracy,but when the main frequency of the structure deviates from the main load frequency range,the time-domain explicit expres- sion based on the Newmark-β integral format achieves a higher efficiency.The research achievements can provide an effective reference for the choice of the numerical integration algorithms used in the structure optimization consi- dering the non-stationary random vibration.

Key words: sensitivity analysis, time-domain explicit method, non-stationary random seismic response