工字形截面RC剪力墙变形指标限值研究
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摘要
为了研究工字形截面RC剪力墙在地震作用下的变形能力,采用ABAQUS分析了324个工字形RC剪力墙有限元模型,以剪跨比和弯剪比为参数确定了构件破坏形态的判断标准。结合我国规范提出了7个性能水准和6个性能水准限值,根据材料应变和荷载-位移曲线定义了6个性能水准限值的判断准则,并可得到所有模型的位移角。根据破坏形态、轴压比和弯剪比进行统计,得到工字形RC剪力墙的变形指标限值并与构件试验及ASCE41指标进行对比,分析结果表明:提出的破坏形态划分方法预测正确率达85%,能够满足工程需求;利用本文变形限值对试验构件破坏形态的判断结果与ASCE 41基本一致;试验得到的"比较严重破坏"位移角约为本文变形限值的3倍,指标限值具有足够的安全储备。
A total of 324 I-section RC shear wall specimens are designed and numerically simulated by ABAQUS to study the seismic deformation ability of I-section RC shear walls and establish the classification criteria of failure modes based on parameters of shear-span-to-depth ratio and moment-shear ratio. According to Chinese codes,seven performance states and six performance limits are proposed. The method to define these limits is provided on the basis of strain of concrete and reinforcement and the force displacement curve through which the displacement angles of all models can be determined. Then,deformation limits of the I-section RC shear walls are obtained and compared with the ASCE41 index by considering parameters such as failure mode,axial load ratio,and moment-shear ratio. Analysis results show that the accuracy of the proposed criteria of failure modes is 85%,which meets engineering requirements. The result of the test members based on the proposed deformation limits is basically the same as that of ASCE 41. The displacement angle of the "serious damage"determined by the experiment is approximately three times more than the result obtained through the proposed deformation limits,and the proposed limits have sufficient safety reserve.
A total of 324 I-section RC shear wall specimens are designed and numerically simulated by ABAQUS to study the seismic deformation ability of I-section RC shear walls and establish the classification criteria of failure modes based on parameters of shear-span-to-depth ratio and moment-shear ratio. According to Chinese codes,seven performance states and six performance limits are proposed. The method to define these limits is provided on the basis of strain of concrete and reinforcement and the force displacement curve through which the displacement angles of all models can be determined. Then,deformation limits of the I-section RC shear walls are obtained and compared with the ASCE41 index by considering parameters such as failure mode,axial load ratio,and moment-shear ratio. Analysis results show that the accuracy of the proposed criteria of failure modes is 85%,which meets engineering requirements. The result of the test members based on the proposed deformation limits is basically the same as that of ASCE 41. The displacement angle of the "serious damage"determined by the experiment is approximately three times more than the result obtained through the proposed deformation limits,and the proposed limits have sufficient safety reserve.
引文
[1]ASCE. ASCE/SEI 41-13,Seismic evaluation and retrofit of existing buildings[S]. Reston,Virginia:ASCE,2014.
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[10]方小丹,李照林,韦宏,等.高配筋率边缘约束构件高强混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2011,32(12):145-153.FANG Xiaodan,LI Zhaolin,WEI Hong,et al. Experimental study on seismic behavior of high performance concrete shear wall with high reinforcement ratio boundary elements[J]. Journal of building structures, 2011,32(12):145-153.
[11]ADEBAE P,IBRAHIM A M M,BRYSON M. Test of high-rise core wall:effective stiffness for seismic analysis[J]. ACI structural journal,2007,104(5):549-559.
[12]HASSAN M,EL-TAWIL S. Tension flange effective width in reinforced concrete shear walls[J]. ACI structural journal,2013,100(3):349-356.
[13]汪锦林.钢筋混凝土带翼缘剪力墙抗震抗剪性能试验研究[D].重庆:重庆大学,2007.WANG Jinlin. Research on seismic shear capacity of reinforced concrete structural walls with flanges[D].Chongqing:Chongqing University,2007.
[14]吴雁江.工字型截面钢筋混凝土剪力墙抗震抗剪性能试验研究[D].重庆:重庆大学,2004.WU Yanjiang. Research on seismic shear capacity of ishape reinforced concrete structural walls[D].Chongqing:Chongqing University,2004.
[15]韦艳丽.工字形RC剪力墙抗震性能及其性能指标试验研究[D].广州:华南理工大学,2016.WEI Yanli. Experimental research on the seismic performance and performance index limits of I-Section RC shear wall[D]. Guangzhou:South China University of Technology,2016.
[2]OESTERLE R G,FIORATO A E. Earthquake resistant structural walls-tests of isolated walls[R]. Skokie,Construction Technology Laboratories,Portland Cement Association,Illinois,1976.
[3]OESTERLE R G,FIORATO A E. Earthquake resistant structural walls-tests of isolated walls-phase II[R]. Skokie,Construction Technology Laboratories,Portland Cement Association,Illinois,1979.
[4]季静,肖启艳,黄超,等.基于性能的钢筋混凝土剪力墙受弯破坏变形限值的研究[J].建筑结构学报,2010,31(9):35-41.JI Jing,XIAO Qiyan,HUANG Chao,et al. Research on deformation limits of performance-based RC shear walls controlled by flexure[J]. Journal of building structures,2010,31(9):35-41.
[5]戚永乐.基于材料应变的RC梁、柱及剪力墙构件抗震性能指标限值研究[D].广州:华南理工大学,2012.QI Yongle. Research on deformation limits of RC beams,columns and shear walls based on material strain[D].Guangzhou:South China University of Technology,2012.
[6]JANKOWIAK T,LODYGOWSKI T. Identification of parameters of concrete damage plasticity constitutive mode[J]. Foundations of civil and environmental engineering,2005(6):53-69.
[7]梁兴文,杨鹏辉,崔晓玲,等.带端柱高强混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2010,31(1):24-32.LIANG Xingwen,YANG Penghui,CUI Xiaoling,et al.Experimental studies on seismic behavior of high strength concrete shear wall with boundary columns[J]. Journal of building structures,2010,31(1):24-32.
[8]BURGUEO R,LIU Xuejian,HINES E M. Web crushing capacity of high-strength-concrete structural walls:experimental study[J]. ACI structural journal,2014,111(1):235-246.
[9]FARVASHANY F E, FOSTER S J, RANGAN B V.Strength and deformation of high-strength concrete shearwalls[J]. ACI structural journal,2008,105(1):21-29.
[10]方小丹,李照林,韦宏,等.高配筋率边缘约束构件高强混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2011,32(12):145-153.FANG Xiaodan,LI Zhaolin,WEI Hong,et al. Experimental study on seismic behavior of high performance concrete shear wall with high reinforcement ratio boundary elements[J]. Journal of building structures, 2011,32(12):145-153.
[11]ADEBAE P,IBRAHIM A M M,BRYSON M. Test of high-rise core wall:effective stiffness for seismic analysis[J]. ACI structural journal,2007,104(5):549-559.
[12]HASSAN M,EL-TAWIL S. Tension flange effective width in reinforced concrete shear walls[J]. ACI structural journal,2013,100(3):349-356.
[13]汪锦林.钢筋混凝土带翼缘剪力墙抗震抗剪性能试验研究[D].重庆:重庆大学,2007.WANG Jinlin. Research on seismic shear capacity of reinforced concrete structural walls with flanges[D].Chongqing:Chongqing University,2007.
[14]吴雁江.工字型截面钢筋混凝土剪力墙抗震抗剪性能试验研究[D].重庆:重庆大学,2004.WU Yanjiang. Research on seismic shear capacity of ishape reinforced concrete structural walls[D].Chongqing:Chongqing University,2004.
[15]韦艳丽.工字形RC剪力墙抗震性能及其性能指标试验研究[D].广州:华南理工大学,2016.WEI Yanli. Experimental research on the seismic performance and performance index limits of I-Section RC shear wall[D]. Guangzhou:South China University of Technology,2016.