斜拉桥成桥初始恒载索力概率确定  

PROBABILISTIC DETERMINATION FOR INITIAL CABLE FORCES OF CABLE - STAYED BRIDGES UNDER DEAD LOADS

作　　者：程进[1] 肖汝诚[1] 江见鲸[2] 

机构地区：[1]同济大学 [2]清华大学

出　　处：《土木工程学报》2003年第12期58-63,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(59938180)

摘　　要：传统斜拉桥成桥初始恒载索力的确定方法由于忽略了结构参数的不确定性而不能满足实际工程设计需要。本文从概率分析的角度出发,提出一种新的确定斜拉桥成桥初始恒载索力方法——改进蒙特卡罗法。该方法采用响应面近似计算斜拉桥成桥初始恒载索力。然后,在响应面的基础上,利用传统蒙特卡罗法计算斜拉桥成桥初始恒载索力的统计特征。最后,采用该方法对一座对称式斜拉桥初始恒载索力进行概率性确定。Due to ignoring the effect for uncertainty of structural parameters, conventional determined method analysis cannot provide complete information regarding the initial cable forces of cable - stayed bridges under dead loads. From the probability analysis point of view, an improved Monte Carlo method, which incorporates the response surface approximate calculating approach , is presented for probabilistic determination on the initial cable forces of cable - styed bridges under dead loads. Second , on the basis of response surface, the conventional Monte Carlo method is used to calculate the statistical parameters for the initial cable forces of cable - stayed bridges under dead loads. Finally, this method has been applied to probabilistic determination for the initial cable forces of a symmetric radiating cable - stayed bridge.

关 键 词：斜拉桥 初始恒载索力 概率性确定 蒙特卡罗法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]