摘要
对复杂结构进行可靠性分析时,利用传统的结构可靠性分析方法可能会遇到困难,但应用响应面法可以有效地解决问题。本文利用响应面法和有限元程序ANSYS对装配式公路钢桥主桁架的挠度、弯曲应力和压杆失稳进行了可靠度分析,得到各种结构行为下极限状态功能函数的近似表达式,从而求出相应的可靠指标。通过分析计算表明,响应面法是装配式公路钢桥平面结构可靠度分析的有效方法。
Some difficulties may be encountered when we analyze the reliability of complicated structures using traditional structural reliability analysis methods,but that can be dealt with effectively by Response Surface Method.The reliability of prefabricated steel bridge on the deflection,bending stress and compression bar buckling of its main truss is calculated by means of Response Surface Method and the Finite Element Method program ANSYS,and get the approximatively limit state function and the corresponding structural system reliability of the various structural mechanical performances.The study shows that Response Surface Method is an effective approach to study the structural systems reliability analysis of plane structure of the prefabricated steel bridges.
出处
《公路交通科技》
CAS
CSCD
北大核心
2005年第1期85-88,共4页
Journal of Highway and Transportation Research and Development
关键词
响应面法
可靠度分析
装配式桥梁
Response surface method
Reliability analysis
Prefabricated bridge
