钢管混凝土拱桥扣索张拉力概率确定

Probabilistic Determination for Supporting Cable Forces of CFST Arch Bridge

针对传统斜拉扣挂法施工中钢管混凝土拱桥确定扣索张拉力的计算方法未考虑结构参数不确定性的问题,从结构参数概率分析的角度出发,通过响应面法得到不同结构参数下斜拉扣索张拉力,并结合蒙特卡罗法计算得到扣索张拉力的统计特征,提出了一种改进型蒙特卡罗法确定斜拉扣索张拉力的计算方法.依托工程实桥进行计算结果分析表明,该方法既能得到扣索张拉力概率解又能分析出各扣索张拉力统计分布特征,对工程实践中扣索张拉力范围确定具有较强的借鉴意义.

For ignoring the effect for uncertainty of structural parameters in process of calculating the supporting cable force with the traditional method in cable erection and stayed knotting method constructed CFST arch bridges,form the probability analysis point of view,an improved Monte Carlo method is presented,which incorporated the response approximate method to determinate on the supporting cable forces under different structure parameters.And on the basis of response method,the statistical parameters of each supporting cable could be calculated by conventional Monte Carlo method.Finally,after analyzing the construction bridge,the result shows this method could get both the probabilistic supporting cable forces and statistical parameters,which could provide a meaning reference for calculating supporting cable forces in practice engineering.