港珠澳大桥索塔吊装吊耳结构受力分析  

Stress analysis for lifting lug structure of cable bent tower of Hong Kong-Zhuhai-Macao Bridge

作　　者：于喜年[1] 温忠宝 文锋[2] 

机构地区：[1]大连交通大学,大连116028 [2]中交公路规划设计院有限公司,北京100088

出　　处：《起重运输机械》2016年第1期40-43,共4页Hoisting and Conveying Machinery

基　　金：国家自然科学基金项目(51375063)

摘　　要：港珠澳大桥CB04标段江海直达船航道风帆型索塔模块化吊装在国内外尚无先例,吊具设计难度大,风险高,吊装吊耳是整个吊装系统重要的连接部件。如何保证吊耳的强度、刚度以及位移满足吊装工程需要,成为吊装系统设计的关键。通过强化吊耳结构设计,提出吊耳结构分析和接触分析的约束和求解方法,并进行Ansys有限元分析,吊耳最大等效应力呈非线性变化,发生在轴套下部两端并呈点状分布,小于材料许用应力值,吊耳最大位移符合起重机设计规范要求,表现为轴孔配合的边缘效应,危险区域较小。轴套等效应力分布曲线显示,3种吊装模态应力均呈中心对称分布,由轴孔两端至中间呈线性增加。分析结果为港珠澳大桥CB04标段索塔吊装提供可靠数据保证和技术支持。There is no precedent for modular hoisting of the sailing cable bent tower of river-sea transportation direct ship channel of CB04 bid section of Hong Kong-Zhuhai-Macao Bridge in China. The design of sling is difficulty and highly risky,and the lifting lug is an important connecting part of the entire hoisting system. How to guarantee that the strength,rigidity,and displacement of the lifting lug meets the hoisting requirements is a key to designing the hoisting system.Through strengthened design of the lifting lug structure,the paper puts forward the constraint and solutions for lifting lug structural analysis and contact analysis,and conducts Ansys finite element analysis. The maximum equivalent stress of the lifting lug indicates non-linear change,which happens at both ends of the lower part of the shaft sleeve and in point-shaped distribution,which is less than the material allowable stress value; the maximum displacement of the lifting lug meets the requirements specified in crane design specification; the stress is shown as the edge effect of the axis hole fitting,with a small dangerous area; it＇s shown in the equivalent stress curve of the axis sleeve that the stresses from three hoisting modes are all in centrosymmetric distribution,increasing linearly from both ends of the axis hole to the middle. The analysis result can provide reliable data support and technical support for hoisting of the sailing cable bent tower of CB04 bid section of Hong Kong-Zhuhai-Macao Bridge.

关 键 词：港珠澳大桥 吊耳 边缘效应 模块化吊装 ANSYS 

分 类 号：U441[建筑科学—桥梁与隧道工程]