关于大挑臂桥墩盖梁简化模型的精度验证  

Validation on theSimplified Model of Long Cantilever Capping Beam of Pier

作　　者：倪宝伟[1] 华新[1] 周青[1] 

机构地区：[1]江苏省交通规划设计院股份有限公司,江苏南京210014

出　　处：《上海公路》2016年第2期65-68,12,共4页Shanghai Highways

摘　　要：连云港跨海大桥下部因桥下景观需要多采用矩形桥墩大挑臂盖梁结构,大挑臂盖梁在设计过程中存在一些问题,如上部荷载传递方式、挑臂根部剪切变形、挑臂根部应力集中及钢束张拉方式等。基于上述存在的问题,建立了全桥有限元板—实体模型和简化的盖梁杆系模型,通过两种模型的对比,对简化模型的精度进行验证。经过验证,简化模型的精度达到设计要求,其具有工程实践意义。Because of the landscape requirement,the rectangular piers with long cantilever capping beam are employed on the Lianyungang coastal bridge.There are some problems in the design,such as the load transfer method,the shear deformation the stress concentration at the end of the cantilever,the tensioning method of steel cable,etc.,This paper established the finite element plate-solid model of the whole bridge and the simplified beam model,verified the precision of the simplified model by the comparisons of two models.The results proved that the precision of the simplified model meet the design requirements,which can be reference for the similar engineering.

关 键 词：大挑臂盖梁 剪切变形 应力集中 板-实体模型 

分 类 号：U441[建筑科学—桥梁与隧道工程]