Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (9): 48-53.doi: 10.3969/j.issn.1000-565X.2011.09.009

• Architecture & Civil Engineering • Previous Articles     Next Articles

Response Spectrum Method Precisely Considering Dynamic Second-Order Effects of Single-Degree-of-Freeofdom System

Wang Zhi-jun  Han Feng-xia  Huang Zong-ming   

  1. College of Civil Engineering∥Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Chongqing 400045,China
  • Received:2011-02-21 Revised:2011-05-05 Online:2011-09-25 Published:2011-08-02
  • Contact: 王志军(1965-) ，男，博士，教授，主要从事钢筋混凝土结构研究． E-mail:zjwang@cqu.edu.cn
  • About author:王志军(1965-) ，男，博士，教授，主要从事钢筋混凝土结构研究．
  • Supported by:

    国家自然科学基金重大研究计划资助项目( 90715002)

PDF

1069

Abstract:

In order to reveal the influence of dynamicand P －Δ and P －δ effects on the single-degree-of-freedom system ( SDOFS) ,the theoretical simulation and the numerical calculation are both conducted from the viewpoint of "stiffness reduction”. First,the formulae of the coefficient of the lateral stiffness reduction precisely considering second-order effects are deduced,which regard the influence of the second-order effects on the structural dynamic
response as the lateral stiffness reduction. Next,the theoretical formula of the response spectrum method precisely considering the second-order effects of SDOFS is proposed and is simplified based on the standard response spectrum of the seismic design code. Then,the differences between the P －Δ and P －δ effects and the P －Δ effect are examined under the static and the dynamic conditions. Finally,the proposed method is verified by the results of the finite element numerical calculation,finding that the results of the proposed method accord well with the numerical ones.

Key words: single-degree-of-freedom system, dynamic second-order effect, stiffness reduction, response spectrum method

CLC Number: