穿孔补强型钢柱轴压试验及有限元分析
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(1 华南理工大学土木工程系，广州 510640；2 广州市设计院，广州 510620；3 华南理工大学亚热带建筑科学国家重点实验室，广州 510640)［摘要］针对实际工程中型钢构件穿孔补强的常规做法可能造成现场焊接工作量大、钢筋排布困难等问题，提出补强板和型钢板叠合穿孔，补强板以正面角焊缝或周边角焊缝的形式与型钢板连接补强的两种做法。对两组共4个采用建议做法补强的H型钢穿孔补强柱进行轴压试验和有限元分析，并与相同尺寸的未穿孔柱、穿孔但不补强柱以及采用常规做法补强柱进行了有限元比较分析。结果表明：采用两种建议做法补强的柱承载力和延性相对于相同尺寸的未穿孔柱不降低；在弹性阶段，补强板和型钢故能有效地共同工作，但当补强板仅采用正面角焊缝连接时，在构件屈服后补强板可能出现外拱现象，且随着补强板尺寸增大，外拱现象愈加明显。综合考虑穿孔补强方式的施工方便及补强效果，补强板和型钢板叠合穿孔、补强板围焊连接的补强方式具有较好的实用性。［关键词］型钢柱; 穿孔补强; 正面焊接; 围焊; 轴压试验; 有限元分析中图分类号：TU392.1 文献标识码：A 文章编号：1002-848X(2013)24-0063-05Axial compression tests and finite element analysis of perforated and strengthened shaped steel columnsLuo Zhicheng1,2, Zhang Haiyan1,3, Wu Bo1,3, Yu Yonghui2, Wang Weijun2(1 Department of Civil Engineering, South China University of Technology, Guangzhou 510640, China; 2 Guangzhou Design Institute, Guangzhou 510620, China; 3 State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou 510640, China）Abstract: The common method in engineering practice for perforated and strengthened shaped steel components may bring heavy welding works and the difficulty of rebar allocation. To deal with these problems, two methods of perforated and strengthened were proposed. The reinforcement plates were overlapped and perforated with shaped steel plates together and then connected by front fillet weld or weld all around with the shaped steel component. Axial compression tests and finite element analysis were carried out on four H-section steel columns which were perforated and strengthened by the above two methods. The results were compared with that of the non-perforated columns, perforated but non-strengthened columns and perforated strengthened columns by common method. The final results show that load bearing capacity and ductility of the columns perforated and strengthened by two proposed methods are not lower than that of non-perforated columns of the same size. The reinforcement plates and shaped steel column can effectively work together when the column is in elastic behavior. However, buckling of the reinforcement plate occurs after the yield of reinforcement plate if it is only connected by front fillet weld to the steel columns, and buckling develops more greatly with the increase of reinforcement plate dimensions. Considering the construction convenience and strengthening effects, the method of strengthening plates perforated with the shaped steel together and welded all around for connection is more applicable to engineering practice.Keywords: shaped steel column; perforated and strengthened; front fillet weld; weld all around; axial compression test; finite element analysis作者简介：骆志成，硕士，Email：565134641@qq.com。参考文献［1］金星. 中央电视台电视文化中心工程型钢混凝土结构 ［J］. 施工技术, 2008, 37(4): 100-101.［2］牛志平.型钢混凝土组合结构梁柱节点深化设计研究 ［J］. 建筑技术, 2010, 41(2): 150-152.［3］梁书亭, 张根俞, 殷杰. 型钢混凝土柱翼缘穿孔缺损率限值及补强分析［J］. 钢结构, 2009, 24(6):18-21.［4］CHENG BIN, ZHAO JINCHENG. Strengthening of perforated plates under uniaxial compression: Buckling analysis ［J］. Thin-Walled Structures, 2010, 48(12): 905-914.［5］BRANDO GIUSEPPE, MATTEIS GIANFRANCO DE. Buckling resistance of perforated steel angle members ［J］. Journal of Constructional Steel Research, 2013（81）: 52-61.［6］CRISAN ANDREI, UNGUREANU VIOREL, DUBINA DAN. Behaviour of cold-formed steel perforated sections in compression：Part 1—Experimental investigations ［J］. Thin-Walled Structures, 2012,61: 86-96.［7］04G523型钢混凝土组合结构构造 ［S］. 北京：中国电子工程设计院， 2004.［8］何东,余永辉,王伟明,等. 广州琶洲PZB1401地块项目转换层节点设计 ［J］. 建筑结构, 2012, 42(6): 53-56.［9］ZHANG HAIYAN, DUAN JING, YU MIN. Test of perforated and reinforced steel skeleton joints under low-cycle load ［C］//Advanced Materials Research, Advances in Civil Engineering. CEBM 2011（255-260）: 294-298.
