连续组合梁腹板洞口段受力与变形特性研究  

Study on the Bearing Capacity and Deformation Characteristics of Continuous Composite Beams with Web Openings

作　　者：李龙起 杨真真 张焕芳 李栋栋 

机构地区：[1]许昌学院土木工程学院,河南许昌461000

出　　处：《许昌学院学报》2017年第2期132-135,共4页Journal of Xuchang University

基　　金：河南省高等学校重点科研项目(17A560026);2016年许昌市科技局基础与前沿项目(405;406)

摘　　要：为研究腹板开洞连续组合梁的受力及变形特征,对5根腹板开洞组合梁和1根无洞组合梁进行了试件加载与有限元模拟分析.研究了混凝土翼板厚度和配筋率变化时组合梁试件的极限承载力、裂缝开展以及洞口段组合梁剪切破坏情况.试验与有限元结果表明:洞口梁段剪切破坏导致连续组合梁丧失承载能力.洞口角点上方两栓钉之间发生混凝土翼板和钢梁的掀起现象,另外试验还显示由于存在严重的应力集中现象会使腹板洞口角点处出现斜向撕裂.In order to study the bearing capacity and deformation characteristics of continuous composite beams with web openings, a composite beam without web openings and five composite beam with web openings were tested and simulated by finite element calculation packages. The bearing capacity, crack development and the shear failure of the composite beams in the web opening region of the composite beams are studied. Test and finite element results show that the shear failure in web opening region results in the loss of carrying capacity of continuous composite beams there is the concrete wing and steel beam lift phenomenon the hove angle above be-tween two studs. Additional tests also showed the presence of severe stress concentration phenomenon can lead to oblique tear at the corners of the web openings.

关 键 词：腹板开洞 应力集中 掀起现象 斜向撕裂 

分 类 号：TU375.1[建筑科学—结构工程]