基于多目标规划的连续钢桁梁预拱度设置研究  

Multi-objective Programming Based Study on Pre-camber Setting of Steel Truss Continuous Girder Bridge

作　　者：李佳莉[1] 张谢东[1] 陈卫东[2] 徐顺莲 张行[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]乌海市公路管理局,乌海016000

出　　处：《武汉理工大学学报（交通科学与工程版）》2016年第2期360-364,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家自然科学基金项目(51408450);中央高校基本科研业务费专项基金项目(2014-IV-023)资助

摘　　要：大跨度连续钢桁梁桥结构复杂、超静定次数较高,预拱度设置时易产生不利的次内力.为了准确便捷地求解合理的预拱度设置曲线,根据运筹学目标规划理论,提出了基于多目标规划的升降温计算方法,建立了综合考虑理论预拱度、附加反力和附加应力的最优化模型,利用MATAB软件求得最优解.以某三跨连续钢桁柔性拱桥预拱度设置为例,研究了预拱度最优化模型的建立及其求解,验证了该计算方法的实用与可靠性.Due to the structural complexities and high degrees of static indeterminacy,the pre-camber setting in a long span steel truss continuous bridge would probably cause harmful secondary force in the structure.In order to effectively and accurately calculate the feasible pre-camber setting curve,the temperature-up-and-down method,which is based on the multi-objective programming in operational research,is applied to establish the model with the help of MATAB computing software by considering theoretical camber,support reaction and subsidiary stress.Taking a three-span continuous steel truss flexible arch bridge as an example,the establishment and calculation of the pre-camber setting optimization model is studied and the reliability and applicability of the computing method are verified.

关 键 词：桥梁工程 预拱度设置 多目标规划 钢桁梁 最优化模型 

分 类 号：U448.13[建筑科学—桥梁与隧道工程]