钢管混凝土边框内藏钢板剪力墙抗震试验与损伤加固
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摘要
提出了一种钢管混凝土边框内藏钢板深梁剪力墙。为研究其抗震性能及损伤后的加固性能,进行了两阶段试验。第I阶段低周反复荷载试验进行到位移角为1/50,试件明显屈服损伤,然后在墙体两侧钢管间贴焊薄钢板进行加固,进行第II阶段低周反复荷载试验,直至试件严重破坏。分析了各试件的承载力、刚度及退化过程、延性、耗能和破坏特征。研究表明:钢管混凝土边框和型钢中柱,有效约束了混凝土条带裂缝的开展,提高了剪力墙的延性;加设内藏钢板深梁,可明显提高剪力墙承载力和后期刚度;混凝土条带与钢管混凝土柱、型钢混凝土柱的连接界面区域,隐含形成了竖向耗能条带,往复变形过程中充分发挥了耗能性能;这种剪力墙明显屈服损伤经加固后,仍具有足够的抗震承载力和良好的耗能能力,便于震后修复。
A shear wall with CFST columns and embedded steel plate deep beams was proposed in this study.Two-stage experiments were carried out to investigate its seismic behavior and the reinforcement behavior after damage.Low cyclic loading test stage-I was applied until the displacement drift arrived at 1/50.The specimen was damaged obviously.After that,thinner steel plates were welded on both sides of the wall so as to strengthen the damaged specimen.Low cyclic loading test stage-II was then applied until the specimen failed.The load-bearing capacity,stiffness and its degradation process,ductility,energy dissipation and failure characteristics were discussed.Results show that,because the cracks on concrete strips are well controlled by the CFST boundary columns and the steel reinforced middle column,the ductility of the wall is improved;By setting the concealed steel plate deep beams,the load-bearing capacity and the later stiffness are improved greatly;the boundary areas between concrete strips and CFST columns as well as steel reinforced middle column formed the vertical energy dissipation strips and consume the energy during the back and forth movement;after damage and strengthening,the new wall still has enough seismic capacity and good energy dissipation capacity,and it is easy to be repaired after earthquake.
A shear wall with CFST columns and embedded steel plate deep beams was proposed in this study.Two-stage experiments were carried out to investigate its seismic behavior and the reinforcement behavior after damage.Low cyclic loading test stage-I was applied until the displacement drift arrived at 1/50.The specimen was damaged obviously.After that,thinner steel plates were welded on both sides of the wall so as to strengthen the damaged specimen.Low cyclic loading test stage-II was then applied until the specimen failed.The load-bearing capacity,stiffness and its degradation process,ductility,energy dissipation and failure characteristics were discussed.Results show that,because the cracks on concrete strips are well controlled by the CFST boundary columns and the steel reinforced middle column,the ductility of the wall is improved;By setting the concealed steel plate deep beams,the load-bearing capacity and the later stiffness are improved greatly;the boundary areas between concrete strips and CFST columns as well as steel reinforced middle column formed the vertical energy dissipation strips and consume the energy during the back and forth movement;after damage and strengthening,the new wall still has enough seismic capacity and good energy dissipation capacity,and it is easy to be repaired after earthquake.
引文
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[8]吕西林,干淳洁,王威.内置钢板钢筋混凝土剪力墙抗震性能研究[J].建筑结构学报,2009,30(5):89-96.LU Xilin,GAN Chunjie,WANG Wei.Study on seismic behavior of steel plate reinforced concrete shear walls[J].Journal of Building Structures,2009,30(5):89-96.(in Chinese)
[9]张建伟,曹万林,董宏英,等.不同构造措施的钢管混凝土边框钢板剪力墙抗震性能试验研究[J].防灾减灾工程学报,2011,31(4):450-456.ZHANG Jianwei,CAO Wanlin,DONG Hongying,et al.Experimental study on seismic performance of steel-plate shear walls with concrete filledsteel tube columns and different constructional measures[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(4):450-456.(in Chinese)
[10]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010Code for Seismic Design of Buildings[S].Beijing:Building Industry Press of China,2010.(in Chinese)
[2]钱稼茹,江枣,纪晓东.高轴压比钢管混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2010,31(7):40-48.QIAN Jiaru,JIANG Zao,JI Xiaodong.Experimental study on seismic behavior of steel tube-reinforced concrete composite shear walls with highaxial compressive load ratio[J].Journal of Building Structures,2010,31(7):40-48.(in Chinese)
[3]聂建国,樊健生,黄远,等.钢板剪力墙的试验研究[J].建筑结构学报,2010,31(9):1-8.NIE Jianguo,FAN Jiansheng,HUANG Yuan,et al.Experimental research on steel plate shear wall[J].Journal of Building Structures,2010,31(9):1-8.(in Chinese)
[4]廖飞宇,陶忠.带不同类型边框柱的剪力墙力学性能试验[J].工业建筑,2007,37(12):31-34,118.LIAO Yu,TAO Zhong.Experiments on behavior of RC shear walls framed with different kinds of columns[J].Industrial Construction,2007,37(12):31-34,118.(in Chinese)
[5]吕西林,董宇光,丁子文.截面中部配置型钢的混凝土剪力墙抗震性能研究[J].地震工程与工程振动,2006,26(6):101-107.LU Xilin,DONG Yuguang,DING Ziwen.Study on seismic behavior of steel reinforced concrete wall[J].Earthquake Engineering and EngineeringVibration,2006,26(6):101-107.(in Chinese)
[6]曹万林,王敏,王绍合,等.矩形钢管混凝土边框组合剪力墙及筒体结构抗震研究[J].工程力学,2008,25(增刊1):58-70.CAO Wanlin,WANG Min,WANG Shaohe,et al.Aseismic research of composite shear wall and core walls with rectangular concrete filled steeltube columns[J].Engineering Mechanics,2008,25(S1):58-70.(in Chinese)
[7]杨亚彬,张建伟,曹万林,等.圆钢管混凝土边框剪力墙抗震性能试验研究[J].世界地震工程,2011,27(1):78-82.YANG Yabin,ZHANG Jianwei,CAO Wanlin,et al.Study on seismic performance of shear wall with concrete filled round steel tube columns[J].World Earthquake Engineering,2011,27(1):78-82.(in Chinese)
[8]吕西林,干淳洁,王威.内置钢板钢筋混凝土剪力墙抗震性能研究[J].建筑结构学报,2009,30(5):89-96.LU Xilin,GAN Chunjie,WANG Wei.Study on seismic behavior of steel plate reinforced concrete shear walls[J].Journal of Building Structures,2009,30(5):89-96.(in Chinese)
[9]张建伟,曹万林,董宏英,等.不同构造措施的钢管混凝土边框钢板剪力墙抗震性能试验研究[J].防灾减灾工程学报,2011,31(4):450-456.ZHANG Jianwei,CAO Wanlin,DONG Hongying,et al.Experimental study on seismic performance of steel-plate shear walls with concrete filledsteel tube columns and different constructional measures[J].Journal of Disaster Prevention and Mitigation Engineering,2011,31(4):450-456.(in Chinese)
[10]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010Code for Seismic Design of Buildings[S].Beijing:Building Industry Press of China,2010.(in Chinese)
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