扇形铅粘弹性阻尼减震混凝土框架结构节点抗震性能试验对比研究
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摘要
为研究扇形铅粘弹性阻尼器对混凝土框架结构节点抗震性能的影响,对扇形铅粘弹性阻尼减震混凝土框架节点和混凝土普通框架节点进行了低周反复加载试验,对比研究了两者的破坏模式、滞回耗能性能、承载能力、位移延性、强度退化和梁端受力筋应变等变化。结果表明:扇形铅粘弹性阻尼减震框架节点中由于阻尼器的影响,使其梁端塑性铰外移,减缓和控制了节点核心区裂缝开展,保护了节点。扇形铅粘弹性阻尼减震试件,其滞回曲线相对普通试件饱满,呈"弓形",节点塑性变形能力强,能够吸收大量地震能量。扇形铅粘弹性阻尼器对框架节点的开裂荷载、屈服点位移延性能力、极限承载力及总体滞回耗能能力的提高较为明显,刚度和强度退化曲线也较为平缓。
Aimed at studying the impact of sector lead viscoelastic damper(SLVD) on earthquake resistance performance of joints in concrete structure,both amortization concrete frame with SLVD and conventional concrete frame are tested by low-cycle reversed loading experiment. Additionally,both of the failure mechanism,performance of hysteretic energy dissipation,bearing capacity,displacement ductility,strength degradation and the changes about the strain of stressed rebar at beam end are studied comparatively. It reveals that because amortization concrete frame with SLVD is influeced by damper,its plastic hinge in beam end is relocated,which mitigates and controls cracks development of the core joints,as well as protecting the joints. The hysteretic curve of SLVD specimen,whose shape is like "bow",is plumper than the conventional specimen's. Also,the joint plastic deformation ability is strong,which is enable to absorb great amout of energy of earthquake. Futhermore,SLVD obviously improves the cracking load,yield displacement ductility capacity,ultimate bearing capacity and overall hysteretic energy dissipation ability. The stiffness and stength degradation curve of SLVD is gentle.
Aimed at studying the impact of sector lead viscoelastic damper(SLVD) on earthquake resistance performance of joints in concrete structure,both amortization concrete frame with SLVD and conventional concrete frame are tested by low-cycle reversed loading experiment. Additionally,both of the failure mechanism,performance of hysteretic energy dissipation,bearing capacity,displacement ductility,strength degradation and the changes about the strain of stressed rebar at beam end are studied comparatively. It reveals that because amortization concrete frame with SLVD is influeced by damper,its plastic hinge in beam end is relocated,which mitigates and controls cracks development of the core joints,as well as protecting the joints. The hysteretic curve of SLVD specimen,whose shape is like "bow",is plumper than the conventional specimen's. Also,the joint plastic deformation ability is strong,which is enable to absorb great amout of energy of earthquake. Futhermore,SLVD obviously improves the cracking load,yield displacement ductility capacity,ultimate bearing capacity and overall hysteretic energy dissipation ability. The stiffness and stength degradation curve of SLVD is gentle.
引文
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[9]朱琰洁,周云,邓雪松,吴从晓.装有扇形铅黏弹性阻尼器框架结构的设计与分析[J].工程抗震与加固改造,2014,36(01):70~75Zhu Yan-jie,Zhou Yun,Deng Xue-song,et al.Analysis and Design of Frame Structure with Sector Lead Viscoelastic Dampers[J].Earthquake Resistant Engineering and Retrofitting,2014,36(01):70~75(in Chinese)
[10]邹爽,霍林生,李宏男.用于村镇木结构建筑的新型角位移阻尼器的性能实验研究[J].工程力学,2011,28(3):62~68Zou Shuang,Huo Lin-sheng,Li Hong-nan.Fundation Experiments Research of New Angle Displacement Damper for Wood Frame Structures in Rural Areas[J].Engineering Mechanics,2011,28(3):62~68(in Chinese)
[11]Sang-Hoon Oha,Young-Ju Kimb,Hong-Sik Ryu.Seismic Performance of Steel Structures with Slit Dampers[J].Engineering Structures,2009,31(9):1997~2008
[12]徐昕.新型扇形铅粘弹性阻尼器性能及应用研究[D].广州:广州大学硕士学位论文,2012Xu Xin.Performance and Application Research on Sector Lead Viscoelastic Dampers[D].Guangzhou:Master Disscrtation of Guangzhou University,2012
[13]JGJ101-96,建筑抗震试验方法规程[S]JGJ101-96,Specification of Testing Methods for Earthquake Resistant Building[J](in Chinese)
[2]周云,徐昕,邹征敏,等.扇形铅粘弹性阻尼器的设计及数值仿真分析[J].土木工程与管理学报,2011,28(2):1~6Zhou Yun,Xu Xin,Zou Zhen-min,et al.Design and Numerical Simulation Analysis of Sector Lead Viscoelastic Damper[J].Journal of Civil Engineering and Management,2011,28(2):1-6(in Chinese)
[3]徐昕,周云,吴从晓.扇形铅粘弹性阻尼器的有限元分析研究[J].防灾减灾工程学报,2012,32(4):444~451Xu Xin,Zhou Yun,Wu Cong-xiao.Finite Element Analysis and Study on Performance of Sector Lead Viscoelastic Dampe[J].Journal of Disaster Prevention and Mitigation Engineering,2012,32(4):444~451(in Chinese)
[4]吴从晓,周云,徐昕,等.扇形铅黏弹性阻尼器滞回性能试验研究[J].建筑结构学报,2014,35(4):7~16Wu Cong-xiao,Zhou Yun,Xu Xin,et al.Performance Experimental Investigations of Sector Lead Viscoelastic Damper[J].Journal of Building Structures,2014,35(4):7~16(in Chinese)
[5]吴轶,何铭基,郑俊光,等.耗能腋撑对钢筋混凝土框架抗震加固性能分析[J].广西大学学报(自然科学版),2009,34(6):725~730Wu Yi,He Ming-ji,Zheng Jun-guang,et al.Analyses of Seismic Retrofitting Performances of Reinforced Concrete Frame with Energy Dissipation Haunch Braces[J].Journal of Guangxi University:Natural Science Edition,2009,34(6):725~730(in Chinese)
[6]尹庆利,张东海,周云.耗能腋撑钢筋混凝土框架结构减震分析[J].土木工程学报,2010,43(增):235~242Yin Qing-li,Zhang Dong-hai,Zhou Yun.Vibration Reduction Analysis of the New System of Reinforced Concrete Frame with Energy Dissipation Haunch Braces[J].China Civil Engineering Journal,2010,43(S):235~242(in Chinese)
[7]周云,尹庆利,林绍明,等.带防屈曲耗能腋撑钢筋混凝土框架结构抗震性能研究[J].土木工程学报,2012,45(11):29~38Zhou Yun,Yin Qing-li,Lin Shao-ming,et al.eismic Performance Investigations of RC Frame Structures with Buckling-Restrained Haunch Braces[J].China Civil Engineering Journal.2012,45(11):29~38(in Chinese)
[8]周云,尹庆利,林绍明.带黏滞阻尼器腋撑钢筋混凝土框架结构抗震性能试验研究[J]建筑结构学报,2011,32(11):64~73Zhou Yun,Yin Qing-li,Lin Shao-ming.Experimental Investigation on Seismic Performance of Rc Frame Structures with Viscous Damper Energy Dissipation Haunch Braces[J].Journal of Building Structures,2011,32(4):7~16(in Chinese)
[9]朱琰洁,周云,邓雪松,吴从晓.装有扇形铅黏弹性阻尼器框架结构的设计与分析[J].工程抗震与加固改造,2014,36(01):70~75Zhu Yan-jie,Zhou Yun,Deng Xue-song,et al.Analysis and Design of Frame Structure with Sector Lead Viscoelastic Dampers[J].Earthquake Resistant Engineering and Retrofitting,2014,36(01):70~75(in Chinese)
[10]邹爽,霍林生,李宏男.用于村镇木结构建筑的新型角位移阻尼器的性能实验研究[J].工程力学,2011,28(3):62~68Zou Shuang,Huo Lin-sheng,Li Hong-nan.Fundation Experiments Research of New Angle Displacement Damper for Wood Frame Structures in Rural Areas[J].Engineering Mechanics,2011,28(3):62~68(in Chinese)
[11]Sang-Hoon Oha,Young-Ju Kimb,Hong-Sik Ryu.Seismic Performance of Steel Structures with Slit Dampers[J].Engineering Structures,2009,31(9):1997~2008
[12]徐昕.新型扇形铅粘弹性阻尼器性能及应用研究[D].广州:广州大学硕士学位论文,2012Xu Xin.Performance and Application Research on Sector Lead Viscoelastic Dampers[D].Guangzhou:Master Disscrtation of Guangzhou University,2012
[13]JGJ101-96,建筑抗震试验方法规程[S]JGJ101-96,Specification of Testing Methods for Earthquake Resistant Building[J](in Chinese)