BRS板部分自复位连接新型卷边PEC柱-钢梁组合框架边节点抗震机理试验
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摘要
为了研究BRS板部分自复位连接新型卷边PEC柱-钢梁组合框架边节点的抗震性能,对考虑PEC柱布置方式和柱顶竖向力的3个缩尺试件进行水平低周往复荷载下的抗震性能试验研究。基于试验结果,从试件的承载力、刚度衰减规律、自复位功效、耗能能力和节点传力机理等方面分析试件的抗震机理。研究结果显示:(a)BRS板部分自复位连接可通过BRS板屈服耗散地震能和预拉杆实现自复位功效,且整个加载过程中结构主要构件处在弹性状态。(b)PEC柱顶竖向力明显提高了其初始抗弯刚度,且其二阶效应加快了连接的耗能发展进程,而PEC柱的布置对初始抗弯刚度、刚度退化和耗能发展进程影响较小。(c)试件SYJ1加载至中震层间侧移限值1/50时其残余相对侧移角小于0.005 rad,而加载至大震层间侧移限值1/30时其残余相对侧移角仍小于0.01 rad,表明该试件具有极佳的自复位功效;试件SYJ3的自复位功效稍劣于试件SYJ1,前者在加载至中震层间侧移限值1/50之前时自复位功效尚好,但加载后期其自复位功效退化明显。
In order to investigate the seismic performance of the joint of a new PEC column-steel beam frame with a partial self-centering BRS energy-dissipation connection,the axial compression on the top of the PEC column and its layout were taken into consideration to design three reduced-scale specimens,and tests were conducted with lowcycle reversed lateral loading. Based on the experimental results,the seismic mechanisms of specimens were analyzed in terms of the load-carrying capacity,bending stiffness degradation,self-centering function,energydissipation capacity,and force-transfer mechanism of the joint. The results indicate that:( a) Partial self-centering BRS connectivity can provide self-centering functionality through dissipation of earthquake energy and reduction of structural response,and the main components are in the elastic state throughout the loading process.( b) The axial compression on the top of the PEC column significantly increases the initial bending stiffness,and accelerates the energy dissipation process,while the layout of the PEC column has little effect on the initial bending stiffness,stiffness degradation,and energy dissipation process.( c) The residual drift angle of specimen SYJ1 is less than 0. 005 rad when the loading drift reaches the interstory drift limit of 1/50 at the medium earthquake level and 0.01 rad when the loading drift reaches the interstory drift limit of 1/30 at the maximum earthquake level,indicating its sound self-centering functionality. The self-centering functionality of specimen SYJ3 is slightly inferior to that of SYJ1,and the self-centering functionality of specimen SYJ3 is strong before the loading drift reaches the interstory drift limit of 1/50,but degenerates significantly in the late stage of loading.
In order to investigate the seismic performance of the joint of a new PEC column-steel beam frame with a partial self-centering BRS energy-dissipation connection,the axial compression on the top of the PEC column and its layout were taken into consideration to design three reduced-scale specimens,and tests were conducted with lowcycle reversed lateral loading. Based on the experimental results,the seismic mechanisms of specimens were analyzed in terms of the load-carrying capacity,bending stiffness degradation,self-centering function,energydissipation capacity,and force-transfer mechanism of the joint. The results indicate that:( a) Partial self-centering BRS connectivity can provide self-centering functionality through dissipation of earthquake energy and reduction of structural response,and the main components are in the elastic state throughout the loading process.( b) The axial compression on the top of the PEC column significantly increases the initial bending stiffness,and accelerates the energy dissipation process,while the layout of the PEC column has little effect on the initial bending stiffness,stiffness degradation,and energy dissipation process.( c) The residual drift angle of specimen SYJ1 is less than 0. 005 rad when the loading drift reaches the interstory drift limit of 1/50 at the medium earthquake level and 0.01 rad when the loading drift reaches the interstory drift limit of 1/30 at the maximum earthquake level,indicating its sound self-centering functionality. The self-centering functionality of specimen SYJ3 is slightly inferior to that of SYJ1,and the self-centering functionality of specimen SYJ3 is strong before the loading drift reaches the interstory drift limit of 1/50,but degenerates significantly in the late stage of loading.
引文
[1]RICLES J,SAUSE R,PENG S W,et al.Experimental evaluation of earthquake resistant posttensioned steel connections[J].Journal of Structure Engineering,2002,128(7):850-859.
[2]RICLES J,SAUSE R.Earthquake resistant post-tensioned connections to concrete filled HSS columns[C]//JOHN W W.Proceedings of the ASCE 2007 Structures Congress.Long Beach(CA,USA):ASCE,2007.
[3]CHOU Chungche,CHEN Junhen,CHEN Y,et al.Evaluating performance of posttensioned steel connections with strands and reduced flange plates[J].Earthquake Engineering and Structure Dynamic,2006,35(9):1167-1185.
[4]IKENAGA M,NAGAE T,NAKASHIMA M,et al.Development of column bases having self-centering and damping capability[C]//MAZZOLANI F M,WADA A.Proceedings of the Fifth International Conference on Behavior of Steel Structures in Seismic Areas STESSA 2006.Yokohama,Japan:Taylor&Francis,2006.
[5]CHI H.Development of post-tensioned column base connection for self-centering seismic resistant steel frame[D].West Lafayette,USA:Purdue University,2009.
[6]方有珍,陆承铎,马吉,等.新型卷边钢板组合截面PEC柱(弱轴)滞回性能足尺试验研究[J].土木工程学报,2013,46(1):24-33.(FANG Youzhen,LU Chengduo,MA Ji,et al.Experimental study on hysteretic behavior of PEC columns(weak axis)fabricated with crimping thin-walled built-up section by full scale[J].Journal of Civil Engineering,2013,46(1):24-33.(in Chinese))
[7]方有珍,马吉,陆承铎,等.新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究[J].工程力学,2013,30(3):181-190.(FANG Youzhen,MA Ji,LU Chengduo,et al.Test study on hysteretic behavior of PEC columns(strong axis)fabricated with crimping thin-walled built-up section[J].Engineering Mechanics,2013,30(3):181-190.(in Chinese))
[8]夏腾云,方有珍,张怀卿,等.相关设计参数对新型卷边薄壁钢板组合PEC柱受力性能的影响[J],兰州理工大学学报,2013,39(6):118-123.(XIA Tengyun,FANG Youzhen,ZHANG Huaiqing,et al.Influence on mechanical performance of partial design parameters of PEC columns fabricated with crimping thin-walled built-up section[J].Journal of Lanzhou University of Technology,2013,39(6):118-123.(in Chinese))
[9]杨永龙,方有珍,赵凯.新型PEC柱(弱轴)-钢梁节点BRS耗能板部分自复位连接抗震性能研究[J].苏州科技学院学报(工程科学版),2014,27(4):47-53.(YANG Yonglong,FANG Youzhen,ZHAO Kai.Study on seismic performance of PEC column fabricated with crimping thin-walled built-up section-steel beam joint with BRS plate connection[J].Journal of Suzhou University of Science&Technology(Engineering and Technology),2014,27(4):47-53.(in Chinese))
[10]方有珍,杨永龙,陈赟,等.新型PEC柱-钢梁BRS耗能部分自复位节点的抗震性能[J].江苏大学学报(自然科学版),2015,36(5):598-603.(FANG Youzhen,YANG Yonglong,CHEN Bing,et al.Test study on seismic performance of new crimping PEC column-steel beam interior joint with partial post-tensioned BRS energy-dissipation connection[J].Journal of Jiangsu University(Natural Science Edition),2015,36(5):598-603.(in Chinese))
[11]MATHEW D S.Seismic testing and analytical studies for development of new seismic force resisting systems for metal buildings[D].San Diego(CA,USA):University of California,2013.
[12]方有珍,顾强,姚江峰,等.新型卷边钢板组合PEC柱-钢梁中节点抗震性能试验研究[J].土木工程学报,2014,47(7):53-62.(FANG Youzhen,GU Qiang,YAO Jiangfeng,et al.Experimental study on seismic performance of new PEC column fabricated with crimping thin-walled built-up section-steel beam interior connections[J].China Civil Engineering Journal,2014,47(7):53-62.(in Chinese))
[13]方有珍,顾强,陆森强,等.新型PEC柱-钢梁T形焊接加强型中节点抗震性能试验研究[J].实验力学,2016,31(1):103-112(FANG Youzhen,GU Qiang,LU Senqiang,et al.Experimental Investigation on node seismic performance of a new PEC column-steel beam with T-shape welding strengthened connection[J].Journal of Experimental Mechanics,2016,31(1):103-112.(in Chinese))
[14]Federal Emergency Management Agency.FEMA 273 NEHRP commentary on the guidelines for the rehabilitation of buildings[S].Washington:Federal Emergency Management Agency,1996.
[2]RICLES J,SAUSE R.Earthquake resistant post-tensioned connections to concrete filled HSS columns[C]//JOHN W W.Proceedings of the ASCE 2007 Structures Congress.Long Beach(CA,USA):ASCE,2007.
[3]CHOU Chungche,CHEN Junhen,CHEN Y,et al.Evaluating performance of posttensioned steel connections with strands and reduced flange plates[J].Earthquake Engineering and Structure Dynamic,2006,35(9):1167-1185.
[4]IKENAGA M,NAGAE T,NAKASHIMA M,et al.Development of column bases having self-centering and damping capability[C]//MAZZOLANI F M,WADA A.Proceedings of the Fifth International Conference on Behavior of Steel Structures in Seismic Areas STESSA 2006.Yokohama,Japan:Taylor&Francis,2006.
[5]CHI H.Development of post-tensioned column base connection for self-centering seismic resistant steel frame[D].West Lafayette,USA:Purdue University,2009.
[6]方有珍,陆承铎,马吉,等.新型卷边钢板组合截面PEC柱(弱轴)滞回性能足尺试验研究[J].土木工程学报,2013,46(1):24-33.(FANG Youzhen,LU Chengduo,MA Ji,et al.Experimental study on hysteretic behavior of PEC columns(weak axis)fabricated with crimping thin-walled built-up section by full scale[J].Journal of Civil Engineering,2013,46(1):24-33.(in Chinese))
[7]方有珍,马吉,陆承铎,等.新型卷边钢板组合截面PEC柱(强轴)滞回性能试验研究[J].工程力学,2013,30(3):181-190.(FANG Youzhen,MA Ji,LU Chengduo,et al.Test study on hysteretic behavior of PEC columns(strong axis)fabricated with crimping thin-walled built-up section[J].Engineering Mechanics,2013,30(3):181-190.(in Chinese))
[8]夏腾云,方有珍,张怀卿,等.相关设计参数对新型卷边薄壁钢板组合PEC柱受力性能的影响[J],兰州理工大学学报,2013,39(6):118-123.(XIA Tengyun,FANG Youzhen,ZHANG Huaiqing,et al.Influence on mechanical performance of partial design parameters of PEC columns fabricated with crimping thin-walled built-up section[J].Journal of Lanzhou University of Technology,2013,39(6):118-123.(in Chinese))
[9]杨永龙,方有珍,赵凯.新型PEC柱(弱轴)-钢梁节点BRS耗能板部分自复位连接抗震性能研究[J].苏州科技学院学报(工程科学版),2014,27(4):47-53.(YANG Yonglong,FANG Youzhen,ZHAO Kai.Study on seismic performance of PEC column fabricated with crimping thin-walled built-up section-steel beam joint with BRS plate connection[J].Journal of Suzhou University of Science&Technology(Engineering and Technology),2014,27(4):47-53.(in Chinese))
[10]方有珍,杨永龙,陈赟,等.新型PEC柱-钢梁BRS耗能部分自复位节点的抗震性能[J].江苏大学学报(自然科学版),2015,36(5):598-603.(FANG Youzhen,YANG Yonglong,CHEN Bing,et al.Test study on seismic performance of new crimping PEC column-steel beam interior joint with partial post-tensioned BRS energy-dissipation connection[J].Journal of Jiangsu University(Natural Science Edition),2015,36(5):598-603.(in Chinese))
[11]MATHEW D S.Seismic testing and analytical studies for development of new seismic force resisting systems for metal buildings[D].San Diego(CA,USA):University of California,2013.
[12]方有珍,顾强,姚江峰,等.新型卷边钢板组合PEC柱-钢梁中节点抗震性能试验研究[J].土木工程学报,2014,47(7):53-62.(FANG Youzhen,GU Qiang,YAO Jiangfeng,et al.Experimental study on seismic performance of new PEC column fabricated with crimping thin-walled built-up section-steel beam interior connections[J].China Civil Engineering Journal,2014,47(7):53-62.(in Chinese))
[13]方有珍,顾强,陆森强,等.新型PEC柱-钢梁T形焊接加强型中节点抗震性能试验研究[J].实验力学,2016,31(1):103-112(FANG Youzhen,GU Qiang,LU Senqiang,et al.Experimental Investigation on node seismic performance of a new PEC column-steel beam with T-shape welding strengthened connection[J].Journal of Experimental Mechanics,2016,31(1):103-112.(in Chinese))
[14]Federal Emergency Management Agency.FEMA 273 NEHRP commentary on the guidelines for the rehabilitation of buildings[S].Washington:Federal Emergency Management Agency,1996.
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