盖板加强型节点断裂性能试验及有限元研究  

EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT ANALYSIS ON FRACTURE PERFORMANCE OF COVER PLATE REINFORCED JOINT

作　　者：刘芸[1] 吴天祥 焦圣伦 张文镜 曹瑞泽 王杨 LIU Yun;WU Tianxiang;JIAO Shenglun;ZHANG Wenjing;CAO Ruize;WANG Yang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Operating Subsidiaries,Qingdao Metro Group Co.,Ltd.,Qingdao 266000,China;Arch-Age Design Co.,Ltd.,Jinan Branch,Jinan 250000,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]青岛地铁集团有限公司运营分公司,山东青岛266000 [3]重庆长厦安基建筑设计有限公司济南分公司,济南250000

出　　处：《工业建筑》2020年第5期133-138,共6页Industrial Construction

基　　金：国家自然科学基金资助项目(51408329)。

摘　　要：为研究盖板加强型节点断裂的特性,通过对3个钢框架盖板加强型节点局部试件的单向拉伸试验及数值模拟,研究加强板厚度、材料强度对试件断裂性能的影响。试验结果及有限元分析表明:试件破坏形态分为加强板端部角焊缝断裂和梁翼缘板断裂两类;当加强板厚度较大时,局部构件塑性变形较大且焊缝开裂风险较大,当厚度达到一定数值后,其变化对试件整体承载能力和焊缝断裂性能影响较小;提高材料强度可增大试件承载能力同时降低其塑性变形能力,但对焊缝处断裂性能影响不明显;加强板端部角焊缝处断裂风险高于对接焊缝。To study the properties of fracturing at the weld of cover plate reinforced joint,3 local specimens of cover plate reinforce connection were tested under uniaxial tensile loading and analyzed by finite element model.The influence of thickness of cover plate and the material strength on fracture properties were studied.The results showed that the failure modes of the specimens could mainly be divided into two types;namely fracture of beam flange and fillet weld fracture at end of cover plate;when the cover-plate was thicker,the risk of cracking at weld increased;when the thickness of plate reached a certain value,the change of thickness had little effect on the bearing capacity of the specimen and the fracture performance of the weld;increasing the strength of the material could improve the bearing capacity of the specimen and reduce the plastic deformation capacity of the specimen,but had no obvious effect on the fracture properties of the weld;the fillet weld at the end of the cover plate had a higher risk of cracking than butt weld.

关 键 词：盖板加强型节点 局部构件 焊缝 断裂性能 试验研究 

分 类 号：TU317[建筑科学—结构工程]