扇形铅黏弹性消能器设计参数对加固框架抗震性能影响分析
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摘要
为研究扇形铅黏弹性消能器设计参数对加固框架抗震性能的影响,使用ABAQUS软件建立加固框架试件的精细化有限元模型,并基于试验结果验证其合理性,在此基础上,研究了扇形有效半径、黏弹性层宽度、铅芯直径3个关键设计参数对扇形铅黏弹性消能器加固框架结构抗震性能的影响及规律。分析结果表明,增加扇形铅黏弹性消能器的扇形有效半径、黏弹性层宽度、铅芯直径均可以提高加固框架的初始刚度、屈服荷载和峰值荷载;增加消能器的扇形有效半径可以显著提高加固框架的抗震性能;为避免消能器扇形有效半径过大导致梁柱局部应力集中,在既有结构加固中,扇形铅黏弹性消能器应避免选取过大的扇形有效半径;消能器的铅芯大小对加固框架的后期承载力影响不大。
To study the influence of the design parameters of sector lead viscoelastic damper on seismic performance of the reinforced frames, precise finite element model corresponding to the experimental retrofitted frame specimens was built based on ABAQUS and validated by test results. Three key parameters of sector lead viscoelastic damper influencing the seismic performance of retrofitted frames were studied: sector effective radius, viscoelastic layer width and lead core diameter. Analysis results indicate that increases of sector effective radius, viscoelastic layer width and lead core diameter of sector lead viscoelastic damper can significantly enhance the initial stiffness, yielding force and lateral bearing capacity of the retrofitted frames. In particular, augment of sector effective radius reveals an obvious raise on seismic performance of the retrofitted frames. However, to avoid local stress concentration of columns and beams, an exaggerated sector effective radius shall be avoided when strengthening existing structures. Furthermore, the size of lead core diameter of sector lead viscoelastic damper has little contribution on the later bearing capacity of the reinforced frames.
To study the influence of the design parameters of sector lead viscoelastic damper on seismic performance of the reinforced frames, precise finite element model corresponding to the experimental retrofitted frame specimens was built based on ABAQUS and validated by test results. Three key parameters of sector lead viscoelastic damper influencing the seismic performance of retrofitted frames were studied: sector effective radius, viscoelastic layer width and lead core diameter. Analysis results indicate that increases of sector effective radius, viscoelastic layer width and lead core diameter of sector lead viscoelastic damper can significantly enhance the initial stiffness, yielding force and lateral bearing capacity of the retrofitted frames. In particular, augment of sector effective radius reveals an obvious raise on seismic performance of the retrofitted frames. However, to avoid local stress concentration of columns and beams, an exaggerated sector effective radius shall be avoided when strengthening existing structures. Furthermore, the size of lead core diameter of sector lead viscoelastic damper has little contribution on the later bearing capacity of the reinforced frames.
引文
[1]张超,翁大根,彭林海.震损钢筋混凝土结构减震加固研究进展[J].工程抗震与加固改造,2012,34(3):112-120,107.ZHANG Chao,WENG Dagen,PENG Linhai.Research Review on Seismic Retrofit of Earthquake-damage RC Structure by Using Energy Dissipation Technology[J].Earthquake Resistant Engineering and Retrofitting,2012,34(3):112-120,107.
[2]SARNO L D,MANFREDI G.Seismic Retrofitting of Existing RC Frames with Buckling Restrained Braces[C]//Proceedings of ATC&SEI 2009Conference on Improving the Seismic Performance of Existing Buildings and Other Structures.2009:741-752.
[3]曹炳政,朱春明,郑昊,等.基于性能的防屈曲支撑在既有建筑抗震加固中的应用研究[J].四川建筑科学研究,2013,39(3):156-160.CAO Bingzheng,ZHU Chunming,ZHENG Hao,et al.Research on the Application of Seismic Strengthening Technology with Buckling-restrained Braces Based on Performance in the Existing Building[J].Sichuan Building Science,2013,39(3):156-160.
[4]GILANI A S J,MIYAMOTO H K,MAHIN S A,et al.Seismic Retrofit of the Lax Theme Building with Mass Damper:Analysis and Experimentation[C]//Proceedings of the 15th World Conference on Earthquake Engineering.2012.
[5]王艮平,张超,邓雪松,等.扇形铅黏弹性阻尼器加固RC框架的抗震性能试验研究[J].土木工程学报,2016,49(10):41-48.WANG Genping,ZHANG Chao,DENG Xuesong,et al.Experimental Study on Seismic Performance of RC Frame Retrofitted with Sector Lead Viscoelastic Dampers[J].China Civil Engineering Journal,2016,49(10):41-48.
[6]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,2012.XU Xin.Performance and Application Research on Sector Lead Viscoelastic Dampers[D].Guangzhou:Guangzhou University,2012.
[7]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):1-6.ZHOU Yun,XU Xin,ZOU Zhengmin,et al.Design and Numerical Simulation Analysis of Sector Lead Viscoelastic Damper[J].Journal of Civil Engineering and Management,2011,28(2):1-6.
[8]徐昕,周云,吴从晓.扇形铅粘弹性阻尼器性能的有限元分析研究[J].防灾减灾工程学报,2012,32(4):444-451.XU Xin,ZHOU Yun,WU Congxiao.Finite Element Analysis and Study on Performance of Sector Lead Viscoelastic Damper[J].Journal of Disaster Prevention and Mitigation Engineering,2012,32(4):444-451.
[2]SARNO L D,MANFREDI G.Seismic Retrofitting of Existing RC Frames with Buckling Restrained Braces[C]//Proceedings of ATC&SEI 2009Conference on Improving the Seismic Performance of Existing Buildings and Other Structures.2009:741-752.
[3]曹炳政,朱春明,郑昊,等.基于性能的防屈曲支撑在既有建筑抗震加固中的应用研究[J].四川建筑科学研究,2013,39(3):156-160.CAO Bingzheng,ZHU Chunming,ZHENG Hao,et al.Research on the Application of Seismic Strengthening Technology with Buckling-restrained Braces Based on Performance in the Existing Building[J].Sichuan Building Science,2013,39(3):156-160.
[4]GILANI A S J,MIYAMOTO H K,MAHIN S A,et al.Seismic Retrofit of the Lax Theme Building with Mass Damper:Analysis and Experimentation[C]//Proceedings of the 15th World Conference on Earthquake Engineering.2012.
[5]王艮平,张超,邓雪松,等.扇形铅黏弹性阻尼器加固RC框架的抗震性能试验研究[J].土木工程学报,2016,49(10):41-48.WANG Genping,ZHANG Chao,DENG Xuesong,et al.Experimental Study on Seismic Performance of RC Frame Retrofitted with Sector Lead Viscoelastic Dampers[J].China Civil Engineering Journal,2016,49(10):41-48.
[6]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,2012.XU Xin.Performance and Application Research on Sector Lead Viscoelastic Dampers[D].Guangzhou:Guangzhou University,2012.
[7]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):1-6.ZHOU Yun,XU Xin,ZOU Zhengmin,et al.Design and Numerical Simulation Analysis of Sector Lead Viscoelastic Damper[J].Journal of Civil Engineering and Management,2011,28(2):1-6.
[8]徐昕,周云,吴从晓.扇形铅粘弹性阻尼器性能的有限元分析研究[J].防灾减灾工程学报,2012,32(4):444-451.XU Xin,ZHOU Yun,WU Congxiao.Finite Element Analysis and Study on Performance of Sector Lead Viscoelastic Damper[J].Journal of Disaster Prevention and Mitigation Engineering,2012,32(4):444-451.