城市高架桥合理抗震体系选择与经济性对比
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摘要
探讨了基于两水准设防的城市高架桥的合理抗震设防标准与相应的结构性能目标。选取两座典型的城市高架桥结构,包括一座正线桥和一座匝道桥,分别采用延性抗震体系和减、隔震体系进行结构抗震设计。对比了不同结构抗震体系所对应的结构在各水准地震作用下具体抗震性能表现,结果表明减、隔震体系具有更优的抗震性能。在此基础上,进一步从经济性的角度上对两种抗震体系进行了比较,结果表明减、隔震体系能有效地减小桥梁下部结构尤其是基础部分的地震反应,进而控制该部分的工程用量,在抵消减、隔震装置的成本增幅后,对总的工程造价还可以实现可观的节约。
The rational multilevel seismic fortification criterion and the corresponding performance objectives were discussed for urban expressway viaducts.Two typical continuous girder viaducts,a mainline bridge and a ramp bridge,were analyzed in this study.For each bridge,a traditional ductile earthquake resisting system and an isolation earthquake resisting system were considered.The detail structural seismic performances corresponding to the two different earthquake resisting systems were compared at each design level of earthquake actions for the two typical bridges.It showed that although both the earthquake resisting systems can satisfy the requirements of the performance objectives,the isolation earthquake resisting system exhibited more perfect seismic performance for both the typical bridges.Furthermore,the added costs corresponding to the two different earthquake resisting systems were also compared for the two typical bridges.It indicated that the isolation system would also achieve a considerable saving in construction cost.This may be attributed to the avoidance of a volume increase in foundations due to seismic actions since they were effectively controlled by the isolation system.
The rational multilevel seismic fortification criterion and the corresponding performance objectives were discussed for urban expressway viaducts.Two typical continuous girder viaducts,a mainline bridge and a ramp bridge,were analyzed in this study.For each bridge,a traditional ductile earthquake resisting system and an isolation earthquake resisting system were considered.The detail structural seismic performances corresponding to the two different earthquake resisting systems were compared at each design level of earthquake actions for the two typical bridges.It showed that although both the earthquake resisting systems can satisfy the requirements of the performance objectives,the isolation earthquake resisting system exhibited more perfect seismic performance for both the typical bridges.Furthermore,the added costs corresponding to the two different earthquake resisting systems were also compared for the two typical bridges.It indicated that the isolation system would also achieve a considerable saving in construction cost.This may be attributed to the avoidance of a volume increase in foundations due to seismic actions since they were effectively controlled by the isolation system.
引文
[1]JTG/TB02-01—2008公路桥梁抗震设计细则[S].
[2]JTJ004-89公路工程抗震设计规范[S].
[3]冯凌云,叶爱君.多跨连续梁桥的减隔震应用研究[J].桥梁建设,2005(6):5-7.
[4]刘健新,赵国辉,李加武.汶川地震及中国公路桥梁抗震设计规范的变迁[J].交通科学与工程,2009,25(1):21-25.
[5]艾庆华,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(Ⅱ):振动台试验[J].地震工程与工程振动,2008,28(3):39-46.
[6]Jangid R S.Stochastic response of bridges seismically isolated by friction pendulum system[J].Journal of Bridge Engineering,2008,13(4):319-330.
[7]Kunde MC,Jangid R S.Seismic behavior of isolated bridges:A-state-of-the-art review[J].Electronic Journal of Structural Engineering,2003,3:140-170.
[8]GB 50413-2007城市抗震防灾规划标准[S].
[9]城市桥梁抗震设计规范(送审稿).
[10]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.
[11]葛继平,管仲国,李建中.群桩基础桥梁抗震分析简化模型[J].结构工程师,2006,22(6):64-67.
[12]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[13]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[14]Mokha A,Constantinou MC,Reinhorn A M,et al.Experimental study of friction-pendulum isolation system[J].J.Struct.Eng.,1991,117(4):1201-1217.
[15]Najm H,Patel R,Nassif H.Evaluation of laminated circular elastomeric bearings[J].Journal of Bridge Engineering,2007,12(1):89-97.
[2]JTJ004-89公路工程抗震设计规范[S].
[3]冯凌云,叶爱君.多跨连续梁桥的减隔震应用研究[J].桥梁建设,2005(6):5-7.
[4]刘健新,赵国辉,李加武.汶川地震及中国公路桥梁抗震设计规范的变迁[J].交通科学与工程,2009,25(1):21-25.
[5]艾庆华,李宏男,王东升,等.基于位移设计的钢筋混凝土桥墩抗震性能试验研究(Ⅱ):振动台试验[J].地震工程与工程振动,2008,28(3):39-46.
[6]Jangid R S.Stochastic response of bridges seismically isolated by friction pendulum system[J].Journal of Bridge Engineering,2008,13(4):319-330.
[7]Kunde MC,Jangid R S.Seismic behavior of isolated bridges:A-state-of-the-art review[J].Electronic Journal of Structural Engineering,2003,3:140-170.
[8]GB 50413-2007城市抗震防灾规划标准[S].
[9]城市桥梁抗震设计规范(送审稿).
[10]张菊辉.基于数值模拟的规则梁桥墩柱的地震易损性分析[D].上海:同济大学,2006.
[11]葛继平,管仲国,李建中.群桩基础桥梁抗震分析简化模型[J].结构工程师,2006,22(6):64-67.
[12]范立础,卓卫东.桥梁延性抗震设计[M].北京:人民交通出版社,2001.
[13]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[14]Mokha A,Constantinou MC,Reinhorn A M,et al.Experimental study of friction-pendulum isolation system[J].J.Struct.Eng.,1991,117(4):1201-1217.
[15]Najm H,Patel R,Nassif H.Evaluation of laminated circular elastomeric bearings[J].Journal of Bridge Engineering,2007,12(1):89-97.
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