Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (6): 1-5.

• Architecture & Civil Engineering •     Next Articles

Influence of Adjacent Brace Rigidity on Effective Length of Compressive Brace in Trusses

Cai Jian  Chen Guo-dong   

  1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-08-02 Revised:2007-09-04 Online:2008-06-25 Published:2008-06-25
  • Contact: 蔡健（1959-），男，教授，博士生导师，主要从事钢-混凝土组合结构研究． E-mail:cvjcai@scut．edu．cn
  • About author:蔡健（1959-），男，教授，博士生导师，主要从事钢-混凝土组合结构研究．
  • Supported by:

    国家重大基础研究前期研究专项（2004CA03300）

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Abstract:

According to the classical elastic stability theory of framework and the related research results, the stability equations of member bar group and the equations to calculate the effective length coefficient of compressive brace are deduced by considering the joint rigidity and the adjacent brace rigidity. Then, the tables for the calculation of effective length of compressive brace in truss are provided for engineering application. As compared with the existing calculation methods, the proposed equations are more general. Calculated and analytical results show that, by considering the rigidity restraint of the adjacent braces at the calculating joint, the calculated effective length of compressive brace in truss slightly decreases, and that, within most range of the rigidity ratio, the calculated effective length coefficients are smaller than those provided by current criteria.

Key words: truss, brace, effective length, semi-rigidity, stability