考虑限位器影响的山区连续梁桥地震响应分析
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摘要
为研究限位器对桥梁结构抗震性能的影响,以一座山区典型连续梁桥为对象,采用非线性时程分析法对桥梁有限位器和无限位器时的地震响应进行对比分析,在此基础上进一步分析了梁端碰撞刚度、限位器刚度和限位器松弛长度3个参数对结构地震反应的影响。分析结果表明:伸缩缝处安装墩梁连接式限位器后,会显著增大过渡墩的地震需求;碰撞刚度、限位器刚度和限位器松弛长度的取值对结构的地震反应有重要影响,选取合理的参数可以有效提升桥梁结构的整体抗震性能。
To study the influences of restrainers on seismic behavior of bridge structures,a typical continuous girder bridge in mountain area was studied.The seismic performances of the bridge with and without restrainers were compared and analyzed by the method of nonlinear time-history analysis.The seismic responses of the bridge affected by restrainer parameters,such as impact stiffness,restrainer stiffness and restrainer slack were investigated.Results indicated that the seismic demand of piers at the expansion joints was increased when the effect of the restrainers between girder and pier was considered.Above parameters had an important effect on longitudinal seismic response of continuous girder bridge,and reasonable parameters could improve the seismic performances of the bridge structure.
To study the influences of restrainers on seismic behavior of bridge structures,a typical continuous girder bridge in mountain area was studied.The seismic performances of the bridge with and without restrainers were compared and analyzed by the method of nonlinear time-history analysis.The seismic responses of the bridge affected by restrainer parameters,such as impact stiffness,restrainer stiffness and restrainer slack were investigated.Results indicated that the seismic demand of piers at the expansion joints was increased when the effect of the restrainers between girder and pier was considered.Above parameters had an important effect on longitudinal seismic response of continuous girder bridge,and reasonable parameters could improve the seismic performances of the bridge structure.
引文
[1]范立础,李建中.汶川桥梁震害分析与抗震设计对策[J].公路,2009,54(5):122-128.
[2]李鸿晶,陆鸣,温增平,等.汶川地震桥梁震害的特征[J].南京工业大学学报:自然科学版,2009,31(1):24-29.
[3]des Roches R,Fenves G L.Design of seismic cable hinge restrain-ers for bridge[J].Journal of Structural Engineering,2000,126(4):500-509.
[4]Trochalakis P,Eberhard M O,Stanton J F.Design of seismic re-strainers for in-span hinges[J].Journal of Structural Engineer-ing,1997,123(4):469-478.
[5]Saiidi M,Randall M,Maragakis E,et al.Seismic restrainers de-sign methods for simply supported bridges[J].Journal of BridgeEngineering,2001,6(5):307-315.
[6]王军文,李建中,范立础.限位器对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71-77.
[7]黄小国,李建中,张哲.连续梁桥纵桥向防落梁装置结构模式对比研究[J].同济大学学报:自然科学版,2009,37(9):1146-1158.
[8]谢旭,吴善幸.考虑支座破坏影响的防止落梁装置地震响应[J].浙江大学学报:工学版,2006,40(12):2180-2185.
[9]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008:37-38.
[10]王东升,王国新,冯启民.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(4):81-85.
[11]王东升,冯启民,王国新.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,2004,21(2):157-166.
[12]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):42-47.
[2]李鸿晶,陆鸣,温增平,等.汶川地震桥梁震害的特征[J].南京工业大学学报:自然科学版,2009,31(1):24-29.
[3]des Roches R,Fenves G L.Design of seismic cable hinge restrain-ers for bridge[J].Journal of Structural Engineering,2000,126(4):500-509.
[4]Trochalakis P,Eberhard M O,Stanton J F.Design of seismic re-strainers for in-span hinges[J].Journal of Structural Engineer-ing,1997,123(4):469-478.
[5]Saiidi M,Randall M,Maragakis E,et al.Seismic restrainers de-sign methods for simply supported bridges[J].Journal of BridgeEngineering,2001,6(5):307-315.
[6]王军文,李建中,范立础.限位器对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71-77.
[7]黄小国,李建中,张哲.连续梁桥纵桥向防落梁装置结构模式对比研究[J].同济大学学报:自然科学版,2009,37(9):1146-1158.
[8]谢旭,吴善幸.考虑支座破坏影响的防止落梁装置地震响应[J].浙江大学学报:工学版,2006,40(12):2180-2185.
[9]重庆交通科研设计院.JTG/T B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008:37-38.
[10]王东升,王国新,冯启民.桥梁结构地震反应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(4):81-85.
[11]王东升,冯启民,王国新.基于直杆共轴碰撞理论的桥梁地震反应邻梁碰撞分析模型[J].工程力学,2004,21(2):157-166.
[12]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):42-47.
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