大尺寸波形钢腹板H型钢梁局部受压承载力分析  

Analysis on bearing capacity of H-shaped steel beam with large-sized corrugated steel webs under local compressive loading

作　　者：李淑琴 李月路 杨震宇 LI Shuqin;LI Yuelu;YANG Zhengyu(School of Automotive and Traffic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009

出　　处：《建筑结构》2022年第4期93-99,共7页Building Structure

基　　金：安徽省自然科学基金-青年基金项目(1608085QE103)。

摘　　要：为满足桥梁和建筑建设需要,研究大尺寸波形钢腹板H型钢梁在局部压力作用下的承载力,共设计了5个试件进行静力加载试验。试验表明,2000型和2400型大尺寸波形钢腹板与1600型波形钢腹板局部受压承载力相差不大,试件的破坏现象均为钢腹板的屈服破坏以及翼缘板和加劲肋的弯曲。试验过程中试件的弹塑性阶段较为显著,达到极限荷载后腹板中上部进入塑性阶段,位移值不断增大,而卸载后底板位移回落。跨中加劲肋能够提高试件的极限承载力,腹板高度对试件的极限承载力影响不大。同时,采用有限元仿真能够较好地模拟试件的受力过程和破坏现象。腹板厚度、翼缘厚度、加劲肋厚度对承载力有直接影响。最后提出了大尺寸波形钢腹板H型钢梁的局部受压承载力计算公式,并将公式计算结果与试验及有限元结果进行对比,结果表明公式具有良好的精度。In order to meet the needs of bridge and building construction,the bearing capacity of H-shaped steel beam with large-sized corrugated steel webs under local pressure was studied.Five specimens were designed for static loading test.Tests have shown that the type 2000 and type 2400 large-sized corrugated steel webs have little difference from type 1600 orrugated steel webs between local compression bearing capacity.The failure phenomena of specimens is the yield failure of the steel web and the bending of the flange plate and the stiffener.The elastic-plastic stage of specimens is more significant during the test.After the ultimate load,the upper middle part of the web enters the plastic stage,the displacement value increases continuously,and the displacement of the bottom plate falls after unloading.The spanning stiffener can increase the ultimate bearing capacity of specimens,and the web height has little effect on the ultimate bearing capacity of specimens.At the same time,the finite element method can better simulate the stress process and failure phenomenon of specimens.The thickness of the web,the thickness of the flange,and the thickness of the stiffener have a direct effect on the bearing capacity.Finally,the calulation formula of the local compressive bearing capacity of H-shaped steel beam with large-sized corrugated steel webs was proposed,and the formula calulation results were compared with the experimental and finite element results,and the results show that the formula has good accuracy.

关 键 词：大尺寸波形钢腹板 局部压力 静力加载试验 局部受压承载力 

分 类 号：TU357[建筑科学—结构工程]