斜拉桥双边箱主梁虚拟刚度分析研究  

Analysis and research on virtual stiffness of double-triangle side box girder of cable-stayed bridge

作　　者：张国栋 鬲鹏飞 王洺鑫 焦烽智 ZHANG Guodong;GE Pengfei;WANG Mingxin;JIAO Fengzhi(Key Experiment of High Performance Bridge Structure Transportation Industry of Shandong Province Communications Planning and Design Institute Group Co.,Ltd.,Shandong Jinan 250101 China)

机构地区：[1]山东省交通规划设计院集团有限公司山东省高性能桥梁结构交通运输行业重点实验室,山东济南250101

出　　处：《山东交通科技》2023年第6期119-122,共4页

摘　　要：为研究梁格法中虚拟横梁模拟方法对斜拉桥双边箱主梁结构计算的影响,以广东某斜拉桥为例,基于梁格法的基本计算原理和Midas有限元软件,对斜拉桥边跨部分进行分析,并对比在虚拟横梁间距变化时结构内力计算结果的差异。结果表明:梁格法中简化后的虚拟横梁对结构内力计算结果基本无影响,并且虚拟横梁间距变化时,结构内力的差异也不太明显。实桥算例证明虚拟横梁刚度的简化取值方法计算精度较高,计算方法简单有效,可以作为同类桥梁结构模拟方法之一。In order to study the effect of virtual beam grillage method in calculation of double-triangle side box girder of cable-stayed bridge with,side span part of a cable-stayed bridge in Guangdong as an example,is analyzed based on the basic calculation principle of grillage method and finite element software Midas,and compared the changes in the distance between the virtual time the calculation results of internal force of structure.The results show that the internal force doesn't vary based on the simplified calculation of the virtual girder,and when virtual girder spacing is changed,the differences in the internal force of the structure is less obvious.The real example shows that the simplified method for calculating the stiffness of the virtual girder is correct,and the calculation method is simple and effective.

关 键 词：斜拉桥 虚拟横梁刚度 梁格法 双边箱主梁 虚拟横梁间距 

分 类 号：U443.35[建筑科学—桥梁与隧道工程]