钢箱梁斜拉桥成桥索力优化分析  

Cable Force Optimization Analysis of Steel Box Girder Cable Stayed Bridge

作　　者：邬佳成 张潭潭 WU Jiacheng;ZHANG Tantan(School of Civil Engineering,Changsha University of Science&Technology Changsha 410114,China)

机构地区：[1]长沙理工大学土木工程学院,长沙410114

出　　处：《广东土木与建筑》2021年第5期91-94,共4页Guangdong Architecture Civil Engineering

摘　　要：为快速确定钢箱梁斜拉桥的合理成桥索力,现以某航道桥为工程背景,采用最小弯曲能量法求解成桥索力,成桥控制目标设置为主梁弯矩和主塔偏移量,通过控制主梁截面应力和桥塔位移,来对成桥索力进行优化。最后通过空间有限元软件Midas/civil进行建模分析,验证了主梁为钢箱梁时采用该方法优化索力的可行性,可快速得到较为合理的成桥状态。In order to solve the reasonable finished cable force of steel box girder cable-stayed bridge quickly,taked one waterway bridge as the engineering background.Furthermore,the minimum bending energy method was utilized to solve the cable force.The control target of the completed bridge state is set as the bending moment of the main beam and the main tower offset.The cable force of the bridge is optimized by controlling the section stress of the main beam and the displacement of the bridge tower.Finally,the spatial finite element software Midas/civil is used for modeling and analysis.On this basis,the feasibility of this method is verified in optimizing the cable force when the main girder is steel box girder.And a more reasonable completed bridge state can be obtained quickly.

关 键 词：斜拉桥 索力优化 最小弯曲能量法 影响矩阵 成桥状态 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]