内置型钢桁架高强混凝土低剪力墙抗震性能研究
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摘要
通过对3个1/4缩尺、剪跨比为1.0的内置型钢桁架高强混凝土低剪力墙试件进行拟静力试验,研究其在低周反复荷载作用下的抗震性能。分析了不同暗柱型钢类型及暗支撑型钢配钢率对试件破坏形态、滞回曲线、骨架曲线、位移延性以及侧向刚度退化的影响。采用有限元软件ABAQUS对试件进行数值模拟。结果表明:内置型钢桁架高强混凝土低剪力墙试件具有弯曲破坏的特征,试件的位移延性与普通高强混凝土低剪力墙相比有明显提高、后期侧向刚度退化曲线更加平缓,说明内置型钢桁架提高其抗震性能的有效性;暗柱型钢及暗支撑型钢配钢率对试件的受剪承载力影响不明显,但对位移延性以及滞回耗能影响显著,当暗支撑相同时,暗柱型钢配钢率提高,试件的受剪承载力有所提高;暗柱型钢相同时,暗支撑型钢配钢率提高能显著提高试件的位移延性和滞回耗能能力。ABAQUS数值模拟结果与试验结果吻合较好。
Considering the effects of different steel ratio of concealed steel columns and diagonal braces,seismic behavior of three 1 /4 scaled low-rise high strength reinforced concrete walls with concealed steel truss, were investigated through quasi-static tests. Numerical analysis by the finite element software ABAQUS was conducted. By studying experiment phenomena, including the failure pattern, hysteresis loops, skeleton curves, displacement ductility and stiffness degradation process,it is indicated that the specimens mainly fail in flexure. The displacement ductility can be improved significantly,and the post-yield stiffness degradation is smoother compared with the normal high strength concrete low-rise shear wall without concealed steel truss,implying the effectiveness of the concealed truss. As the steel ratio of concealed braces is raised,the maximum horizontal bearing capacity is increased slightly,while the displacement ductility and hysteretic energy dissipation capacity can be improved significantly. Numerical simulation results of ABAQUS agreed well with experiment results.
Considering the effects of different steel ratio of concealed steel columns and diagonal braces,seismic behavior of three 1 /4 scaled low-rise high strength reinforced concrete walls with concealed steel truss, were investigated through quasi-static tests. Numerical analysis by the finite element software ABAQUS was conducted. By studying experiment phenomena, including the failure pattern, hysteresis loops, skeleton curves, displacement ductility and stiffness degradation process,it is indicated that the specimens mainly fail in flexure. The displacement ductility can be improved significantly,and the post-yield stiffness degradation is smoother compared with the normal high strength concrete low-rise shear wall without concealed steel truss,implying the effectiveness of the concealed truss. As the steel ratio of concealed braces is raised,the maximum horizontal bearing capacity is increased slightly,while the displacement ductility and hysteretic energy dissipation capacity can be improved significantly. Numerical simulation results of ABAQUS agreed well with experiment results.
引文
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[4]武藤清.结构物动力设计[M].藤家禄,译.北京:中国建筑工业出版社,1984:87-90.(Muto Kiyoshi.Structural dynamic design[M].Translated by Teng Jialu.Beijing:China Architecture&Building Press,1984:87-90.(in Chinese))
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[8]曹万林,张建伟,田宝发,刘春燕,宋文勇.带暗支撑低矮剪力墙抗震性能试验及承载力计算[J].土木工程学报,2004,37(3):44-51.(CAO Wanlin,ZHANG Jianwei,TIAN Baofa,LIU Chunyan,SONG Wenyong.Experimental study on aseismic property and calculation of load-carrying capacity for low-rise RC shear walls with concealed bracings[J].China Civil Engineering Journal,2004,37(3):44-51.(in Chinese))
[9]曹万林,杨兴民,黄选明,常广勋.钢筋混凝土带暗支撑一字形截面短肢剪力墙抗震性能试验研究[J].世界地震工程,2004,20(4):30-35.(CAO Wanlin,YANG Xingmin,HUANG Xuanming,CHANG Guangxun.Experimental study on seismic performance of I-shaped short pier RC shear wall with concealed bracing[J].World Earthquake Engineering,2004,20(4):30-35.(in Chinese))
[10]梁兴文,辛力,邓明科,方林,张兴虎.高强混凝土剪力墙抗震性能及其性能指标试验研究[J].土木工程学报,2010,43(11):37-45.(LIANG Xingwen,XIN Li,DENG Mingke,FANG Lin,ZHANG Xinghu.Experimental study on the seismic behavior of high performance steel-concrete shear walls[J].China Civil Engineering Journal,2010,43(11):37-45.(in Chinese))
[2]Charles R Farrar,John W Reed,Michael W Salmon.Failure modes of low-rise shear walls[J].Journal of Energy Engineering,1993,119(2):119-138.
[3]蒋欢军,王斌,吕西林.提高钢筋混凝土剪力墙抗震性能的思想与方法[J].同济大学学报(自然科学版,2014,42(2):167-174.(JIANG Huanjun,WANG Bin,LU Xilin.Concepts and measures for improving seismic performance of reinforced concrete shear walls[J].Journal of Tongji University(Natural Science),2014,42(2):167-174.(in Chinese))
[4]武藤清.结构物动力设计[M].藤家禄,译.北京:中国建筑工业出版社,1984:87-90.(Muto Kiyoshi.Structural dynamic design[M].Translated by Teng Jialu.Beijing:China Architecture&Building Press,1984:87-90.(in Chinese))
[5]Salonikios T N.Shear strength and deformation patterns of RC walls with aspect ratio 1.0 and 1.5 designed to Eurocode 8(EC8)[J].Engineering Structures,2002,24(1):39-49.
[6]戴航,丁大均,陆勤.带水平短缝低剪力墙与普通剪力墙模型的对比振动台试验研究[J].工程力学,1992,9(2):76-85.(DAI Hang,DING Dajun,LU Qin.Comparative experimental studies of models of shear walls with and without horizontal short keyways on shaking table[J].Engineering Mechanics,1992,9(2):76-85.(in Chinese))
[7]曹万林,崔立长,张建伟,等.暗支撑与其它抗震措施在剪力墙中的联合应用[J].世界地震工程,2001,17(4):67-70.(CAO Wanlin,CUI Lichang,ZHANG Jianwei,et al.Combined application of RC shear wall with concealed bracings and other aseismatic measures[J].World Earthquake Engineering,2001,17(4):67-70.(in Chinese))
[8]曹万林,张建伟,田宝发,刘春燕,宋文勇.带暗支撑低矮剪力墙抗震性能试验及承载力计算[J].土木工程学报,2004,37(3):44-51.(CAO Wanlin,ZHANG Jianwei,TIAN Baofa,LIU Chunyan,SONG Wenyong.Experimental study on aseismic property and calculation of load-carrying capacity for low-rise RC shear walls with concealed bracings[J].China Civil Engineering Journal,2004,37(3):44-51.(in Chinese))
[9]曹万林,杨兴民,黄选明,常广勋.钢筋混凝土带暗支撑一字形截面短肢剪力墙抗震性能试验研究[J].世界地震工程,2004,20(4):30-35.(CAO Wanlin,YANG Xingmin,HUANG Xuanming,CHANG Guangxun.Experimental study on seismic performance of I-shaped short pier RC shear wall with concealed bracing[J].World Earthquake Engineering,2004,20(4):30-35.(in Chinese))
[10]梁兴文,辛力,邓明科,方林,张兴虎.高强混凝土剪力墙抗震性能及其性能指标试验研究[J].土木工程学报,2010,43(11):37-45.(LIANG Xingwen,XIN Li,DENG Mingke,FANG Lin,ZHANG Xinghu.Experimental study on the seismic behavior of high performance steel-concrete shear walls[J].China Civil Engineering Journal,2010,43(11):37-45.(in Chinese))
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