考虑支座及挡块力学性能退化的桥梁横向地震响应分析
|
摘要
板式橡胶支座的摩擦滑移特性及横向挡块力学性能是影响中小跨径梁桥横向抗震性能评价的重要因素。通过循环水平加载试验,考虑橡胶材料、竖向压应力及加载速率等参数,探讨了板式橡胶支座摩擦滑移特性及滑移后力学性能;在此基础上,对一座三跨预应力混凝土连续梁桥模型进行动力增量分析,分析了板式橡胶支座的滑移损伤及挡块力学性能退化对横桥向地震响应的影响。结果表明:循环水平荷载作用下的板式橡胶支座会因摩擦滑移而发生一定损伤,不同影响因素下损伤情况不同,但其摩擦滑移特性均会逐渐趋于稳定;板式橡胶支座摩擦滑移损伤及挡块的力学性能退化对横桥向地震响应影响较大,且其相互影响,在中小跨径梁桥抗震分析中应同时考虑。
The friction sliding feature of laminated rubber bearings and the mechanical performance of stoppers have significant influences on the transverse aseismic ability evaluation of medium-small span bridges. A cyclic loading test was conducted to investigate the friction sliding feature and the mechanical performance of laminated rubber bearings after sliding,the effects of relevant parameters,such as,vertical compressive stress,loading rate and rubber material were considered. The FE model of a three-span prestressed concrete continuous beambridge was built and its transverse seismic responses were studied with the incremental dynamic analysis method considering performance degradation of bearings and stoppers. The results showed that laminated rubber bearings have a certain damage due to friction and sliding under the action of horizontal cyclic loads; their damage levels are different under different affecting factors,but their friction sliding feature can tend to a stable state gradually; friction sliding damage of bearings and stoppers' performance degradation have significant influences on the transverse seismic responses of bridges, they interact each other,so the performance degradation of bearings and stoppers should be considered in aseismic analysis of medium-small span bridges.
The friction sliding feature of laminated rubber bearings and the mechanical performance of stoppers have significant influences on the transverse aseismic ability evaluation of medium-small span bridges. A cyclic loading test was conducted to investigate the friction sliding feature and the mechanical performance of laminated rubber bearings after sliding,the effects of relevant parameters,such as,vertical compressive stress,loading rate and rubber material were considered. The FE model of a three-span prestressed concrete continuous beambridge was built and its transverse seismic responses were studied with the incremental dynamic analysis method considering performance degradation of bearings and stoppers. The results showed that laminated rubber bearings have a certain damage due to friction and sliding under the action of horizontal cyclic loads; their damage levels are different under different affecting factors,but their friction sliding feature can tend to a stable state gradually; friction sliding damage of bearings and stoppers' performance degradation have significant influences on the transverse seismic responses of bridges, they interact each other,so the performance degradation of bearings and stoppers should be considered in aseismic analysis of medium-small span bridges.
引文
[1]庄卫林,陈乐生,等.汶川地震公路震害分析-桥梁与隧道[M].北京:人民交通出版社,2013.
[2]王克海.桥梁抗震研究[M].2版.北京:中国铁道出版社,2014.
[3]王克海,韦韩,李茜,等.中小跨径公路桥梁抗震设计理念[J].土木工程学报,2012,45(9):115-121.WANG Kehai,WEI Han,LI Qian,et al.Philosophies on seismic design of highway bridges of small or medium spans[J].China Civil Engineering Journal,2012,45(9):115-121.
[4]TOBIAS D H,ANDERSON R E,HODEL C E,et al.Overview of earthquake resisting system design and retrofit strategy for bridges in illinois[J].Practice Periodical on Structural Design and Construction,2008,13(3):47-158.
[5]聂利英,李建中,范立础.滑动支座竖向动反力对桥梁结构动力性能的影响[J].同济大学学报,2002,30(11):1290-1294.NIE Liying,LI Jianzhong,FAN Lichu.Effects of dynamic vertical resistance force of sliding bearing of bridges[J].Journal of Tongji University,2002,30(11):1290-1294.
[6]聂利英,李建中,胡世德,等.地震作用下板式橡胶支座滑动引起的城市立交中的动力耦合作用[J].工程力学,2006,23(11):14-20.NIE Liying,LI Jianzhong,HU Shide,et al.Dynamic response coupled by rubber bearing sliding in interchange bridge under earthquake[J].Engineering Mechanics,2006,23(11):14-20.
[7]王常峰,陈兴冲.竖向地震动对桥梁结构地震反应的影响[J].振动与冲击,2007,26(6):31-35.WANG Changfeng,CHEN Xingchong.Effect of vertical excitation on seismic performance of continuous bridge[J].Journal of Vibration and Shock,2007,26(6):31-35.
[8]LIU K Y,CHANG K C,CHENG W C.Seismic performance of skewed bridge with friction type rubber bearings[C]∥.In Proc.The 14th World Conference on Earthquake Engineering,Beijing,China,2008:1-4.
[9]李冲,王克海,李悦,等.板式橡胶支座摩擦滑移抗震性能实验研究[J].东南大学学报(自然科学版),2014,44(1):162-167.LI Chong,WANG Kehai,LI Yue.Experimental study on seismic performance of laminated rubber bearings with friction slipping[J].Journal of Southeast University(Natural Science Edition),2014,44(1):162-167.
[10]STEELMAN J S,FAHNESTOCK L A,FILIPOV E T,et al.Shear and friction response of nonseismic laminated elastomeric bridge bearings subject to seismic demands[J].Journal of Bridge Engineering,2013,18(7):612-623.
[11]聂利英,李建中,范立础.地震作用下结构碰撞的模型参数及其影响分析[J].工程力学,2005,22(5):142-146.NIE Liying,LI Jianzhong,FAN Lichu.Selection of pounding analysis parameters and its effects on structure under earthquake[J].Engineering Mechanics,2005,22(5):142-146.
[12]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J].振动与冲击,2007,26(9):104-107.DENG Yulin,PENG Tianbo,LI Jianzhong.Pounding model of bridge structures and parameters analysis under transverse earthquakes[J].Journal of Vibration and Shock,2007,26(9):104-107.
[13]MALEKI S.Effect of side retainers on seismic response of bridges with elastomeric bearings[J].Journal of Bridge Engineering,2004,9(1):95-100.
[14]沈贤,王军文,李建中,等.地震作用下斜交简支梁桥桥面旋转反应的参数分析[J].振动与冲击,2015,34(5):61-72.SHEN Xian,WANG Junwen,LI Jianzhong,et al,Parametric analysis for deck’s inplane rotation responses of simplysupported skewed girder bridges under ground motions[J].Journal of Vibration and Shock,2015,34(5):61-72.
[15]MEGALLY S H,SILVA P F,SEIBLE F.Seismic response of sacrificial shear keys in bridge abutments[R].Structural Systems Research Project,Rep.No.SSRP-2001/23,San Diego:University of California,2001:177-188.
[16]徐略勤,李建中.新型滑移挡块的设计、试验及防震效果研究[J].工程力学,2016,33(2):111-118.XU Lueqin,LI Jianzhong.Design and experimental investigation of a new type sliding retainer and its efficacy in seismic fortification[J].Engineering Mechanics,2016,33(2):111-118.
[17]GOEL R K,CHOPRA A K.Role of shear keys in seismic behavior of bridges crossing fault-rupture zones[J].Journal of Bridge Engineering,2008,13(4):398-408.
[18]ABDEL-MOHTI A,PEKCAN G.Assessment of seismic performance of skew reinforced concrete box girder bridges[J].International Journal of Advanced Structure Engineering,2013(5):1-18.
[19]汤虎,李建中,邵长宇.中小跨径板式橡胶支座梁桥横向抗震性能[J].中国公路学报,2016,29(3):55-65.TANG Hu,LI Jianzhong,SHAO Changyu.Seismic performance of small and medium span girder bridges with plate type elastomeric pad bearings in the transverse direction[J].China Journal of Highway and Transport,2016,29(3):55-65.
[20]FILIPOV E T,FAHNESTOCK L A,STEELMAN J S,et al.Evaluation of quasi-isolated seismic bridge behavior using nonlinear bearing models[J].Engineering Structure,2013,49(4):168-181.
[21]RUSSO G,PAULETTA M.Sliding instability of fiberreinforced elastomeric isolators in unbonded application[J].Engineering Structures,2013,48(3):70-80.
[22]AVIRAN A,MACKIE K R,STOJADINOVIC B.Guidelines for nonlinear analysis of bridge structures in california[R].PEER Report 2008/03,California:Pacific Earthquake Engineering Research Center,2008:18-38.
[2]王克海.桥梁抗震研究[M].2版.北京:中国铁道出版社,2014.
[3]王克海,韦韩,李茜,等.中小跨径公路桥梁抗震设计理念[J].土木工程学报,2012,45(9):115-121.WANG Kehai,WEI Han,LI Qian,et al.Philosophies on seismic design of highway bridges of small or medium spans[J].China Civil Engineering Journal,2012,45(9):115-121.
[4]TOBIAS D H,ANDERSON R E,HODEL C E,et al.Overview of earthquake resisting system design and retrofit strategy for bridges in illinois[J].Practice Periodical on Structural Design and Construction,2008,13(3):47-158.
[5]聂利英,李建中,范立础.滑动支座竖向动反力对桥梁结构动力性能的影响[J].同济大学学报,2002,30(11):1290-1294.NIE Liying,LI Jianzhong,FAN Lichu.Effects of dynamic vertical resistance force of sliding bearing of bridges[J].Journal of Tongji University,2002,30(11):1290-1294.
[6]聂利英,李建中,胡世德,等.地震作用下板式橡胶支座滑动引起的城市立交中的动力耦合作用[J].工程力学,2006,23(11):14-20.NIE Liying,LI Jianzhong,HU Shide,et al.Dynamic response coupled by rubber bearing sliding in interchange bridge under earthquake[J].Engineering Mechanics,2006,23(11):14-20.
[7]王常峰,陈兴冲.竖向地震动对桥梁结构地震反应的影响[J].振动与冲击,2007,26(6):31-35.WANG Changfeng,CHEN Xingchong.Effect of vertical excitation on seismic performance of continuous bridge[J].Journal of Vibration and Shock,2007,26(6):31-35.
[8]LIU K Y,CHANG K C,CHENG W C.Seismic performance of skewed bridge with friction type rubber bearings[C]∥.In Proc.The 14th World Conference on Earthquake Engineering,Beijing,China,2008:1-4.
[9]李冲,王克海,李悦,等.板式橡胶支座摩擦滑移抗震性能实验研究[J].东南大学学报(自然科学版),2014,44(1):162-167.LI Chong,WANG Kehai,LI Yue.Experimental study on seismic performance of laminated rubber bearings with friction slipping[J].Journal of Southeast University(Natural Science Edition),2014,44(1):162-167.
[10]STEELMAN J S,FAHNESTOCK L A,FILIPOV E T,et al.Shear and friction response of nonseismic laminated elastomeric bridge bearings subject to seismic demands[J].Journal of Bridge Engineering,2013,18(7):612-623.
[11]聂利英,李建中,范立础.地震作用下结构碰撞的模型参数及其影响分析[J].工程力学,2005,22(5):142-146.NIE Liying,LI Jianzhong,FAN Lichu.Selection of pounding analysis parameters and its effects on structure under earthquake[J].Engineering Mechanics,2005,22(5):142-146.
[12]邓育林,彭天波,李建中.地震作用下桥梁结构横向碰撞模型及参数分析[J].振动与冲击,2007,26(9):104-107.DENG Yulin,PENG Tianbo,LI Jianzhong.Pounding model of bridge structures and parameters analysis under transverse earthquakes[J].Journal of Vibration and Shock,2007,26(9):104-107.
[13]MALEKI S.Effect of side retainers on seismic response of bridges with elastomeric bearings[J].Journal of Bridge Engineering,2004,9(1):95-100.
[14]沈贤,王军文,李建中,等.地震作用下斜交简支梁桥桥面旋转反应的参数分析[J].振动与冲击,2015,34(5):61-72.SHEN Xian,WANG Junwen,LI Jianzhong,et al,Parametric analysis for deck’s inplane rotation responses of simplysupported skewed girder bridges under ground motions[J].Journal of Vibration and Shock,2015,34(5):61-72.
[15]MEGALLY S H,SILVA P F,SEIBLE F.Seismic response of sacrificial shear keys in bridge abutments[R].Structural Systems Research Project,Rep.No.SSRP-2001/23,San Diego:University of California,2001:177-188.
[16]徐略勤,李建中.新型滑移挡块的设计、试验及防震效果研究[J].工程力学,2016,33(2):111-118.XU Lueqin,LI Jianzhong.Design and experimental investigation of a new type sliding retainer and its efficacy in seismic fortification[J].Engineering Mechanics,2016,33(2):111-118.
[17]GOEL R K,CHOPRA A K.Role of shear keys in seismic behavior of bridges crossing fault-rupture zones[J].Journal of Bridge Engineering,2008,13(4):398-408.
[18]ABDEL-MOHTI A,PEKCAN G.Assessment of seismic performance of skew reinforced concrete box girder bridges[J].International Journal of Advanced Structure Engineering,2013(5):1-18.
[19]汤虎,李建中,邵长宇.中小跨径板式橡胶支座梁桥横向抗震性能[J].中国公路学报,2016,29(3):55-65.TANG Hu,LI Jianzhong,SHAO Changyu.Seismic performance of small and medium span girder bridges with plate type elastomeric pad bearings in the transverse direction[J].China Journal of Highway and Transport,2016,29(3):55-65.
[20]FILIPOV E T,FAHNESTOCK L A,STEELMAN J S,et al.Evaluation of quasi-isolated seismic bridge behavior using nonlinear bearing models[J].Engineering Structure,2013,49(4):168-181.
[21]RUSSO G,PAULETTA M.Sliding instability of fiberreinforced elastomeric isolators in unbonded application[J].Engineering Structures,2013,48(3):70-80.
[22]AVIRAN A,MACKIE K R,STOJADINOVIC B.Guidelines for nonlinear analysis of bridge structures in california[R].PEER Report 2008/03,California:Pacific Earthquake Engineering Research Center,2008:18-38.