钢骨箱形柱内横隔板采用改良型电热熔渣焊细部及梁翼板高程差对梁柱接合抗震性能的影响  

Seismic Performance of Beam-to-Column Connections Affected by Modified Details of ESWs and Elevation Deviation of Beam Flanges

作　　者：林克强 庄胜智 吴忠哲 李昭贤 林志翰 蔡克铨[2] LIN Kerchun;JHUANG Shettgjhil;WU Chungche;LI Chaohsien;LIN Chinhan;TSAI Kehchyuan(Taiwan Cetner for Research on Earthquake Engineering.Taipei 10668,China;Department of Civil Engineering,Taiwan University,Taipei 10617.China)

机构地区：[1]台湾地震工程研究中心,台北10668 [2]台湾大学土木工程学系,台北10617

出　　处：《建筑钢结构进展》2018年第5期85-97,共13页Progress in Steel Building Structures

摘　　要：电热熔渣焊(Electro-slag Welding,ESW)为钢骨箱形柱制作柱内横隔板最有效率的焊接方法之一,因此台湾钢骨建筑结构的箱形柱构件广泛采用ESW作为柱内横隔板与柱板连接的焊接方法。由过去实尺寸梁柱接合试验研究成果发现,箱形柱内横隔板采ESW与柱板连接的梁柱接合抗震性能可靠度不佳,在未发展充分非弹性变形前发生破坏的几率较高。进一步针对ESW焊道制作与质量检测的相关研究也显示,传统ESW焊道的制作与检测质量仍有改善空间,并提出喇叭形扩大孔的ESW熔池改良细部。该研究共进行4组实尺寸梁翼盖板式增强型梁柱接合试验,研究参数包括梁翼板与箱形柱内横隔板的偏心、ESW焊接熔池细部与荷载历时。试验结果显示,若梁翼板未偏心且ESW焊道制作良好的试件,可提供5%rad层间位移角的变形容量。当梁翼板与柱内横隔板高程偏心1倍梁翼板厚度时,采用传统矩形ESW熔池细部的梁柱接合试件,其层间位移角约降至3%rad;箱形柱板与内横隔板连接的ESW采用改良喇叭形熔池细部的梁柱接合试件,具有5%rad以上层间位移角的抗震性能,甚至可高达8%rad而不会发生断裂。Electro-slag welding（ESW）is one of most efficient welding methods for fabricating a diaphragm of box column.Hence ESW is widely used to connect inner diaphragms to column plates for box columns in Taiwan steel structure industry.Many previous research on full scale beam-to-column connection test indicates that seismic performance of beam-to-column connections with ESW between box column plate and diaphragm does not have good reliability.A higher probability of damage prior to sufficient nonlinear deformation is found.Some previous research also shows that fabrications and inspections of the ESW joints still have large space of improvement,and a modified weld pool details of ESW is proposed.In this study,there are four full scale beamto-column connection tests to be carried out.Study parameters include eccentricity of beam flange and inner diaphragm in elevation,weld pool shape of ESW and protocol of loading history.The test results show the specimens with no eccentricity between beam flange and diaphragm and well ESW quality can provide 5% radian deformation capacity of inter-story drift angle.However,when an eccentricity of one beam flange thickness between beam flange and diaphragm is used,one specimenusing traditional rectangular-shape weld pool details of the ESW decreases deformation capacity to 3% radian,and the other specimens using modified flared-shape weld pool details of ESW have more than 5%radian capacity of inter-story drift angle,even up to 8% radian without fracture.

关 键 词：电热熔渣焊 抗震性能 高程差 梁柱接合 改良ESW焊道熔池细部 

分 类 号：TU352.1[建筑科学—结构工程]