桥梁施工控制中的结构设计参数敏感性分析

基于敏感性分析的基本原理，将施工控制目标转化为有约束的极小值问题，推导了结构设计参数对控制目标的敏感因子计算公式。据此公式并结合ANSYS软件的梯度分析功能，对一座钢管混凝土拱桥进行了施工阶段的结构设计参数敏感性分析，找出影响桥梁施工控制误差的主要设计参数。实践表明该方法简单实用，所得结论对类似桥梁的施工和设计具有借鉴意义。

Sensitivity Analysis of Structural Design Parameters for Construction Control of Bridge

Based on the theory of sensitivity analysis,the problem of construction control was translated into a minimum problem with restraints,and the expression for sensitivity index was denied.Taking advantage of this expression and the gradient analysis function in the ANSYS software,the sensitivity analysis of structural design parameters in the construction of a CFST arch bridge was performed.The design parameters that primarily influence the error of construction control were determined.It was indicated that the method was very simple and useful,and the conclusion should be valuable to the construction and design of similar bridges.