穿孔补强型钢柱轴压试验及有限元分析  

Axial compression tests and finite element analysis of perforated and strengthened shaped steel columns

作　　者：骆志成[1,2] 张海燕[1,3] 吴波[1,3] 余永辉[2] 王维俊[2] 

机构地区：[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

出　　处：《建筑结构》2013年第24期63-67,57,共6页Building Structure

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。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 colmnns 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 yieht of reinforeemem plate if it is only connected by front fillet weld to the steel eolumns, and buckling develops more greatly with the increase of reinforcement plate dimensions. Considering the construction convenience and strengthening effeets, the method of strengthening plates perforated with the shaped steel together and wehted all around for connection is more applicable to engineering practice.

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 

分 类 号：TU392.1[建筑科学—结构工程]