缓冲型拉索减震支座脉冲地震下减震性能
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摘要
为了解决脉冲型地震作用下桥梁结构地震响应较大的问题,通过拉索差异化布置、增设弹簧缓冲装置等方法对现有拉索减震支座进行改进,提出缓冲型拉索减震支座装置。本文阐述了缓冲型拉索减震支座的设计思想和工作原理,以实际工程为背景,应用SAP2000有限元分析软件建立连续梁桥模型,对比缓冲型拉索减震支座和拉索减震支座在脉冲型地震作用下抗震性能的异同,研究了缓冲型拉索减震支座设计参数对脉冲型地震作用下桥梁减隔震性能的影响规律。分析结果表明:缓冲型拉索减震支座在脉冲型地震作用下能够实现力和位移的合理调节,可以起到较好的减隔震效果。
To reduce the response of bridges under the action of pulse-type earthquakes,the present cable sliding friction aseismic bearing is improved using methods such as differentiated arrangement of the inhaul cable and increasing the spring buffering unit to obtain a new type of aseismic bearing called the buffer cable sliding friction aseismic bearing(BCSFAB). This paper describes the design philosophy and working mechanism of the BCSFAB,referencing actual works as a background,and applies SAP2000 FE analysis software to establish a continuous girder bridge model. By comparing the seismic responses of the BCSFAB and a cable sliding friction aseismic bearing under the action of a pulse-type earthquake,the effects of the design parameters of the proposed bearing on the seismic reduction and isolation were determined. The analytical results showed that that the BCSFAB can achieve reasonable regulation of force and displacement in pulse-type earthquakes; it also demonstrated excellent seismic reduction and isolation effects.
To reduce the response of bridges under the action of pulse-type earthquakes,the present cable sliding friction aseismic bearing is improved using methods such as differentiated arrangement of the inhaul cable and increasing the spring buffering unit to obtain a new type of aseismic bearing called the buffer cable sliding friction aseismic bearing(BCSFAB). This paper describes the design philosophy and working mechanism of the BCSFAB,referencing actual works as a background,and applies SAP2000 FE analysis software to establish a continuous girder bridge model. By comparing the seismic responses of the BCSFAB and a cable sliding friction aseismic bearing under the action of a pulse-type earthquake,the effects of the design parameters of the proposed bearing on the seismic reduction and isolation were determined. The analytical results showed that that the BCSFAB can achieve reasonable regulation of force and displacement in pulse-type earthquakes; it also demonstrated excellent seismic reduction and isolation effects.
引文
[1]逯宗典.近场地震作用下减隔震桥梁的地震响应分析研究[D].上海:同济大学,2009:1-19.LU Zongdian.Response control of isolated bridge under near-field ground motion[D].Shanghai:Tongji University,2009:1-19.
[2]严鑫,车伟,林钰琪,等.近场脉冲型地震作用下框架结构特殊反应研究[J].四川建筑科学研究,2015,41(2):188-191.YAN Xin,CHE Wei,LIN Yuqi,et al.The special seismic response of frame structure subjected to near-field pulselike ground motions[J].Sichuan building science,2015,41(2):188-191.
[3]王江波,贺金海,袁万城.近场地震作用下采用拉索减震支座桥梁纵向地震响应特性[J].结构工程师,2012,28(5):82-88.WANG Jiangbo,HE Jinhai,YUAN Wancheng.Influence of near-fault ground motion characteristics on seismic responses of continuous beam bridges using cable-sliding friction aseismic bearing(CSFAB)[J].Structural engineers,2012,28(5):82-88.
[4]RAY T,SARLIS A A,REINHORN A M,et al.Hysteretic models for sliding bearings with varying frictional force[J].Earthquake engineering and structural dynamics,2013,42(15):2341-2360.
[5]TSAI C S,LIN Y C,SU H C.Characterization and modeling of multiple friction pendulum isolation system with numerous sliding interfaces[J].Earthquake engineering and structural dynamics,2010,39(13):1463-1491.
[6]袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal of Harbin Engineering University,2010,39(13):1463-1491.
[7]袁万城,韦正华,曹新建,等.拉索减震支座及桥梁抗震设计应用研究[J].工程力学,2011(S2):204-209.YUAN Wancheng,WEI Zhenghua,CAO Xinjian,et al.Cable-sliding friction aseismic bearing and its application in bridge seismic design[J].Engineering mechanics,2011(S2):204-209.
[8]党新志,袁万城,庞于涛,等.自复位拉索减震装置研究[J].哈尔滨工程大学学报,2013(12):1537-1543.DANG Xinzhi,YUAN Wancheng,PANG Yutao,et al.Development and application of the self-centering cablesliding friction aseismic device[J].Journal of Harbin Engineering university,2013(12):1537-1543.
[9]王江波.近场地震作用下采用拉索减震支座桥梁抗震性能分析[D].上海:同济大学,2013:6-11.WANG Jiangbo.Seismic performance analysis of bridge using cable-sliding friction aseismic bearing under near-field ground motion[D].Shanghai:Tongji University,2013:6-11.
[10]袁万城,王斌斌.拉索减震支座的抗震性能分析[J].同济大学学报(自然科学版),2011,39(8):1126-1131.YUAN Wancheng,WANG Binbin.Numerical model and seismic performance of cable-sliding friction aseismic bearing[J].Journal of Tongji University(natural science),2011,39(8):1126-1131.
[11]韦正华.拉索减震支座开发及在桥梁抗震中的应用研究[D].上海:同济大学,2011:15-22.WEI Zhenghua.Development of cable-sliding friction aseismic bearing and its application in bridge seismic design[D].Shanghai:Tongji University,2011:15-22.
[12]刘世佳.拉索减震支座的标准化设计研究[D].上海:同济大学,2015:29-58.LIU Shijia.Research on standardized design of cablesliding friction aseismic bearing[D].Shanghai:Tongji University,2015:29-58.
[2]严鑫,车伟,林钰琪,等.近场脉冲型地震作用下框架结构特殊反应研究[J].四川建筑科学研究,2015,41(2):188-191.YAN Xin,CHE Wei,LIN Yuqi,et al.The special seismic response of frame structure subjected to near-field pulselike ground motions[J].Sichuan building science,2015,41(2):188-191.
[3]王江波,贺金海,袁万城.近场地震作用下采用拉索减震支座桥梁纵向地震响应特性[J].结构工程师,2012,28(5):82-88.WANG Jiangbo,HE Jinhai,YUAN Wancheng.Influence of near-fault ground motion characteristics on seismic responses of continuous beam bridges using cable-sliding friction aseismic bearing(CSFAB)[J].Structural engineers,2012,28(5):82-88.
[4]RAY T,SARLIS A A,REINHORN A M,et al.Hysteretic models for sliding bearings with varying frictional force[J].Earthquake engineering and structural dynamics,2013,42(15):2341-2360.
[5]TSAI C S,LIN Y C,SU H C.Characterization and modeling of multiple friction pendulum isolation system with numerous sliding interfaces[J].Earthquake engineering and structural dynamics,2010,39(13):1463-1491.
[6]袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental study on cable-sliding friction aseismic bearing[J].Journal of Harbin Engineering University,2010,39(13):1463-1491.
[7]袁万城,韦正华,曹新建,等.拉索减震支座及桥梁抗震设计应用研究[J].工程力学,2011(S2):204-209.YUAN Wancheng,WEI Zhenghua,CAO Xinjian,et al.Cable-sliding friction aseismic bearing and its application in bridge seismic design[J].Engineering mechanics,2011(S2):204-209.
[8]党新志,袁万城,庞于涛,等.自复位拉索减震装置研究[J].哈尔滨工程大学学报,2013(12):1537-1543.DANG Xinzhi,YUAN Wancheng,PANG Yutao,et al.Development and application of the self-centering cablesliding friction aseismic device[J].Journal of Harbin Engineering university,2013(12):1537-1543.
[9]王江波.近场地震作用下采用拉索减震支座桥梁抗震性能分析[D].上海:同济大学,2013:6-11.WANG Jiangbo.Seismic performance analysis of bridge using cable-sliding friction aseismic bearing under near-field ground motion[D].Shanghai:Tongji University,2013:6-11.
[10]袁万城,王斌斌.拉索减震支座的抗震性能分析[J].同济大学学报(自然科学版),2011,39(8):1126-1131.YUAN Wancheng,WANG Binbin.Numerical model and seismic performance of cable-sliding friction aseismic bearing[J].Journal of Tongji University(natural science),2011,39(8):1126-1131.
[11]韦正华.拉索减震支座开发及在桥梁抗震中的应用研究[D].上海:同济大学,2011:15-22.WEI Zhenghua.Development of cable-sliding friction aseismic bearing and its application in bridge seismic design[D].Shanghai:Tongji University,2011:15-22.
[12]刘世佳.拉索减震支座的标准化设计研究[D].上海:同济大学,2015:29-58.LIU Shijia.Research on standardized design of cablesliding friction aseismic bearing[D].Shanghai:Tongji University,2015:29-58.
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