桥梁桁架焊接典型热点局部应力集中的实验检测分析

Analysis on Experimental Detection of Local Stress Concentration of Typical Hotspot for Bridge Truss Welding

阐述了具有焊接热点的桥梁桁架缩尺模型的建立,对桥梁桁架焊接热点实验测点布置、约束及加载方案进行说明;介绍了桥梁桁架缩尺模型热点应力检测分析。对桥梁桁架结构典型焊接节点区域,开展应力状态有限元测试分析,获得测区的典型局部结构应力参数值及分布状态,对桥梁桁架结构的抗疲劳提供技术研究参考。

The establishment of scale model of bridge truss with welding hotspot is elaborated,the experimental monitoring point arrangement of welding hotspot for bridge truss,restraint and loading schemes are described,and the detection analysis on hotspot stress of scale model of bridge truss is introduced.The test analysis on finite element under the state of stress is made in the region of typical welding hotspot of bridge truss structure,so as to obtain the parameter value and distributing state of typical local structure stress of testing region and provide reference of technical research for the antifatigue of bridge truss structure