螺栓连接波纹腹板钢梁疲劳性能试验与分析  

Experimental and Numerical Analysis on the Fatigue Performance of Bolted Steel Beams with Corrugated Webs

作　　者：袁焕鑫[1] 李晗 高立强 王奥迪 YUAN Huanxin;LI Han;GAO Liqiang;WANG Aodi(School of Civil Engineering,Wuhan University,Wuhan 430072,China;State Key Laboratory forIntelligent and Green of Bridge Engineering,Wuhan 430034,China)

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]桥梁智能与绿色建造国家重点实验室,武汉430034

出　　处：《建筑钢结构进展》2024年第1期86-93,共8页Progress in Steel Building Structures

基　　金：桥梁结构健康与安全国家重点实验室开放课题重点基金项目(BHSKL19-03-KF)。

摘　　要：对2根螺栓连接波纹腹板钢梁试件进行疲劳试验研究,获得了钢梁试件的疲劳性能指标以及失效破坏形态,分析了钢梁截面的应力分布以及循环荷载作用下的应力和刚度变化。汇总现有的焊接波纹腹板钢梁疲劳试验结果,比较分析了焊接钢梁与螺栓连接钢梁的疲劳寿命差异。采用有限元软件ABAQUS建立了螺栓连接波纹腹板钢梁的精细数值模型,根据疲劳试验结果验证了数值模型的准确性。利用经验证的数值模型,对疲劳破坏位置附近的应力分布进行有限元分析,结果表明螺栓孔边应力集中是疲劳裂纹萌生和引发疲劳破坏的主要原因。基于有限元分析结果,利用FE-Safe软件对螺栓连接波纹腹板钢梁试件的疲劳寿命进行分析,计算得到的疲劳寿命和疲劳破坏位置与试验结果吻合良好。Fatigue tests on two bolted steel beam specimens with corrugated webs were carried out,and the fatigue performance and failure modes of the specimens were obtained.The stress distributions on the beam cross-section,and the stress and stiffness variations under cyclic loading of the specimens were analyzed.Existing fatigue test results of welded steel beams with corrugated webs were summarized,and the fatigue life differences between welded and bolted steel beams were compared.By using the finite element software ABAQUS,numerical models of the bolted steel beam specimens with corrugated webs were developed,and the model accuracy was verified by comparing with previously obtained fatigue test results.Based on the validated numerical models,the stress distributions around the fatigue failure position were studied.The stress concentration at the bolt hole was the main reason for the initiation of fatigue crack and subsequent fatigue failure.Based on the obtained numerical results,the fatigue life of the steel beams was further studied using the FE-Safe software,and the predicted fatigue life and position of fatigue failure agreed well with the fatigue test results.

关 键 词：波纹腹板钢梁 螺栓连接 疲劳试验 疲劳寿命 有限元分析 

分 类 号：TU391[建筑科学—结构工程]