铁道科学与工程学报Issue(4)：845-851,7.
外接式钢-混组合桁架铁路桥端节点试验对比分析
Experimental contrast analysis of external steel -concrete co mposite truss railway bridges
摘要
Abstract
A static experiment was done on multi -group steel -concrete composite truss joints and steel truss -groove beam composite structure whose proportions are 1∶3 to study the modes of failure,ultimate bearing capaci-ty and failure mechanism of the two composite truss joint.The results show that the failure mode of the external steel -concrete composite truss includes concrete cracking,the bucking deformation at pressed part of gusset plate,high strength bolt slippage,gusset plate to be ruptured and stress focusing on the interface of concrete -chord with gusset plate.The failure mode of steel truss -groove beam composite structure involves web member unstable failure,stress focusing on the interface of concrete -chord with gusset plate.The failure mode of rein-forced steel truss -groove beam composite structure comprises high strength bolt slippage,gusset plate to be rup-tured and stress focusing on the interface of concrete -chord with gusset plate.The finite element software ABAQUS was applied to simulate each node,the test and simulation analysis show that the bearing capacity of steel truss -trough girder composite truss joints with larger height and size of gusset plate is significantly superior to that of external steel -concrete composite truss.Under the same content of overall dimensions,we can control failure mode by changing the stiffness ratio of each part.关键词
钢-混凝土组合桁架/钢桁 -槽型梁组合结构/破坏模式/有限元分析/刚度比Key words
steel -concrete composite joint/steel truss -groove beam composite structure/failure mode/finite element analysis/stiffness ratio分类
建筑与水利引用本文复制引用
王海波,尹国安..外接式钢-混组合桁架铁路桥端节点试验对比分析[J].铁道科学与工程学报,2015,(4):845-851,7.基金项目
国家自然科学基金资助项目（50908230）；铁道部科技研究开发计划项目 （）
