芯柱式构造柱约束墙体抗震性能拟静力试验研究
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摘要
芯柱式构造柱是一种施工简便,造价较低的新型构造柱。为考察芯柱式构造柱约束墙体的抗震性能,进行11个墙体试件(包括3片无约束墙,2片现浇构造柱约束墙和6片芯柱式构造柱约束墙)的低周往复荷载试验。对比分析芯柱式构造柱约束墙体、无约束墙体、现浇构造柱约束墙体的破坏特征,两种构造柱中的纵筋、箍筋及构造柱与墙体间的拉接筋的应变,并分组对比各种墙体的滞回耗能性能。试验结果表明,芯柱式构造柱可对开裂后的墙体起到有效约束,改善墙体的破坏形态;芯柱式构造柱纵筋、箍筋及其与墙体间的拉结筋在墙体严重破坏阶段可达到屈服;芯柱式构造柱约束墙体的滞回环形状多为梭形,耗能能力较强。芯柱式构造柱与传统现浇构造柱的功能相近,可较好地提高墙体的抗震性能。
Core-tie-column is a new style of tie-column with the advantage of making easier and costing cheaper. In order to study the seismic behavior of wall restrainted by core-tie-columns,pseudo-static testes of 11 specimens,which concluded 3 specimens without restraints,2 specimens restrainted by cast-in-place tie-column and 6 specimens restrainted by core-tie-columns,were carried out,and the failure characteristics,strain of longitudinal bar,grid bar in tie-columns,hysteretic curves and dissipative of the specimens were investigated and contrasted. It is shown that,the restraints of core-tie-columns on the wall is effective so that the failure mode of the wall has been improved,the strains of most longitudinal bars and grid bars of core-tie-columns and tie bars between wall and core-tie-columns intend to yield strain. The hysteretic curves of the walls restrainted by core-tie-column are more dissipative. Above all,as similar as cast-in-place tie-columns,the core-tie-columns can improve the seismic behavior of the masonry wall greatly.
Core-tie-column is a new style of tie-column with the advantage of making easier and costing cheaper. In order to study the seismic behavior of wall restrainted by core-tie-columns,pseudo-static testes of 11 specimens,which concluded 3 specimens without restraints,2 specimens restrainted by cast-in-place tie-column and 6 specimens restrainted by core-tie-columns,were carried out,and the failure characteristics,strain of longitudinal bar,grid bar in tie-columns,hysteretic curves and dissipative of the specimens were investigated and contrasted. It is shown that,the restraints of core-tie-columns on the wall is effective so that the failure mode of the wall has been improved,the strains of most longitudinal bars and grid bars of core-tie-columns and tie bars between wall and core-tie-columns intend to yield strain. The hysteretic curves of the walls restrainted by core-tie-column are more dissipative. Above all,as similar as cast-in-place tie-columns,the core-tie-columns can improve the seismic behavior of the masonry wall greatly.
引文
[1]李英民,刘立平.汶川地震建筑震害与思考[M].重庆:重庆大学出版社,2008:6(Li Yingmin,Liu Liping.Earthquake damages and analysis of buildings in Wenchuan Earthquake.[M].Chongqing:Chongqing University Press,2008:6(in Chinese))
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[3]刘晓峰,蔡贤辉,程耿东.砌体结构震害及农村房屋加固的锚固拉结方法[J].大连理工大学学报,2009,49(5):631-638(Liu Xiaofeng,Cai Xianhui,Cheng Gengdong.Earthquake damage of masonry buildings and anchorage-tie strengthening method for rural houses[J].Journal of Dalian University of Technology,2009,49(5):631-638(in Chinese))
[4]重庆大学.一种用于砌体结构的构造柱以及其专用预制块.中国,ZL200820100863.6[P].2009-09-16
[5]周炳章.用钢筋混凝土构造柱提高砖混结构抗震性能的试验研究及设计计算[C]//地震工程论文集.北京:科学出版社,1982:214-245(Zhou Bingzhang.Experimental study and design of seismic behavior of masonry structure constrained by tie-columns[C]//Proceedings of Earthquake Engineering.Beijing:Sciatic Press,1982:214-245(in Chinese))
[6]周锡元,李万举,闫维明,等.构造柱约束的混凝土小砌块墙体抗震性能的试验研究[J].土木工程学报,2006,39(8):45-50(Zhou Xiyuan,Li Wanju,Yan Weiming,et al.An experimental study on the seismic behavior of small concrete block walls confined by tie columns and beams[J].China Civil Engineering Journal,2006,39(8):45-50(in Chinese))
[7]李英民,郑妮娜,夏洪流,等.芯柱式构造柱约束墙体抗震变形性能试验研究[J].土木建筑与环境工程,2010,32(4):1-6(Li Yingmin,Zheng Nina,Xia Hongliu.Pseudo-static test study on seismic deformation behavior of masonry wall constrained by core-tie-columns[J].Journal of Civil Architectural&Environmental Engineering,2010,32(4):1-6(in Chinese))
[2]Dogangun A,Ural A,Livaoglu R.Seismic performance of masonry buildings during recent earthquakes in Turkey[C]//Proceedings of the 14th World Conference on Earthquake Engineering.Beijing,China,2008
[3]刘晓峰,蔡贤辉,程耿东.砌体结构震害及农村房屋加固的锚固拉结方法[J].大连理工大学学报,2009,49(5):631-638(Liu Xiaofeng,Cai Xianhui,Cheng Gengdong.Earthquake damage of masonry buildings and anchorage-tie strengthening method for rural houses[J].Journal of Dalian University of Technology,2009,49(5):631-638(in Chinese))
[4]重庆大学.一种用于砌体结构的构造柱以及其专用预制块.中国,ZL200820100863.6[P].2009-09-16
[5]周炳章.用钢筋混凝土构造柱提高砖混结构抗震性能的试验研究及设计计算[C]//地震工程论文集.北京:科学出版社,1982:214-245(Zhou Bingzhang.Experimental study and design of seismic behavior of masonry structure constrained by tie-columns[C]//Proceedings of Earthquake Engineering.Beijing:Sciatic Press,1982:214-245(in Chinese))
[6]周锡元,李万举,闫维明,等.构造柱约束的混凝土小砌块墙体抗震性能的试验研究[J].土木工程学报,2006,39(8):45-50(Zhou Xiyuan,Li Wanju,Yan Weiming,et al.An experimental study on the seismic behavior of small concrete block walls confined by tie columns and beams[J].China Civil Engineering Journal,2006,39(8):45-50(in Chinese))
[7]李英民,郑妮娜,夏洪流,等.芯柱式构造柱约束墙体抗震变形性能试验研究[J].土木建筑与环境工程,2010,32(4):1-6(Li Yingmin,Zheng Nina,Xia Hongliu.Pseudo-static test study on seismic deformation behavior of masonry wall constrained by core-tie-columns[J].Journal of Civil Architectural&Environmental Engineering,2010,32(4):1-6(in Chinese))
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