某C型冷弯薄壁钢构件冲击后的极限承载力研究  

RESEARCH ON THE ULTIMATE BEARING CAPACITY OF A COLD-FORMED THIN-WALLED STEEL MEMBER AFTER IMPACT

作　　者：李发超 张旭[1] 赵伟欣 朱珏[1] LI Fachao;ZHANG Xu;ZHAO Weixin;ZHU Jue(Key Laboratory of Impact and Safety Engineering (Ningbo University),Ministry of Education,Ningbo 315211,China)

机构地区：[1]宁波大学冲击与安全工程教育部重点实验室

出　　处：《工业建筑》2019年第5期133-138,共6页Industrial Construction

基　　金：国家自然科学基金项目(11572162);浙江省自然科学基金项目(LY13A020007);第47批国家教育部留学回国人员基金项目;宁波大学王宽诚基金项目

摘　　要：采用有限条软件(CUFSM)计算出冷弯薄壁钢构件静态受压时以畸变屈曲为主的C型截面尺寸,用50 kg的落锤对长410 mm的C型冷弯钢构件进行不同速度下的轴向冲击试验,并用WAW-2000型万能试验机对未受轴向冲击和进行过轴向冲击的C型冷弯钢构件进行静态轴压试验,得到试件的载荷-位移曲线。结合有限元软件,对模型引入合适的初始缺陷,进行以上试验的有限元分析,得到的结果与试验结果吻合较好。通过对比完好试件与受损试件的极限承载能力,分析得到了试样剩余承载力系数与冲量的线性关系。CUFSM was used to calculate the C-section size of the cold-formed thin-walled steel members with distortional buckling under static compression, the impact test of a 50 kg drop hammer for a 410 mm long C-shaped cold-formed steel member at different speeds was performed. Then the WAW-2000 universal testing machine was used to perform static axial compression tests on C-type cold-formed steel members that had not been subjected or had been subjected to axial impact, and the load-displacement curve of the specimen was obtained. Then the finite element software was used to simulate the above experimens. The finite element simulation results were in good agreement with the experimental results. By comparing the ultimate bearing capacity of intact and damaged specimens, the relationship between the residual bearing capacity coefficient and the impulse of the specimen was analyzed.

关 键 词：冷弯薄壁钢构件 落锤 有限元 剩余极限承载力 初始缺陷 

分 类 号：TU392.1[建筑科学—结构工程]