斜拉桥合理成桥状态索力确定的优化方法  

Optimization of Cable Tension in Reasonably Finished State of Cable-Stayed Bridges

作　　者：杜蓬娟[1] 张哲[2] 谭素杰[1] 

机构地区：[1]大连民族学院土木建筑工程系,辽宁大连116600 [2]大连理工大学桥梁研究所,辽宁大连116024

出　　处：《公路交通科技》2005年第7期82-84,89,共4页Journal of Highway and Transportation Research and Development

摘　　要：以不变形预张力为基础,将斜拉桥合理成桥状态索力确定问题归结为一个多目标、多约束的非线性规划问题,并采用改进后的基于极大熵原理的凝聚函数法将此非线性规划问题转化为一个可微的单目标、单约束优化问题。在此基础上,采用乘子惩罚函数法进行求解,并通过算例证明该方法的正确性和可行性。该优化方法不但适合斜拉桥合理索力的确定,而且能够应用于悬索桥、拱桥的施工控制中。<Abstrcat>Based on undeformed pretension of cable,the cable tension in reasonably finished state of cable-stayed bridges is considered as a problem of non-linear programming with multi-objective andulti-constraint,which can be converted into an optimization with a single-objective and single-constraint by exploiting maximum entropy based improved aggregate function method.The optimization with single-objective and single-constraint is realized by using a technique of multiplier penalty functions.The correctness and validity of the method are verified by examples.This method is suitible for the definition of the cable tension of cable-stayed bridges in finished state,and for construction control of suspension bridges and arch bridges.

关 键 词：斜拉桥 不变形预张力 优化方法 凝聚函数 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]