底板水平布置的连续刚构桥地震反应分析
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摘要
云南省龙陵至腾冲二级公路上的龙腾大桥,采用变连续刚构桥方案,桥跨布置为58m+102.25m+63m,其桥址位于八度地震区,需要进行抗震设计;依据抗震准则的设计目标,进行了地震作用下的抗震分析,包括自振特性分析,反应谱分析和动态时程分析;并以此为合理的结构抗震设计提供明确的依据。
The construction of Longteng Bridge on the second-rank road between Longling and Tengchong in Yunnan Province used pre-stress concrete continuous box girder layout,the span of this bridge is 58m+102.25m+63m,the bridge construction site is located in eight degree seismic area,as a result,the design of the bridge should consider earthquake-resistance.Based on design objective of earthquake-resistance principle,earthquake-resistance analysis under the action of earthquake is conducted including natural vibration characteristics analysis,response spectrum analysis and dynamic time-history analysis,which provides the clear basis for reasonable structure earthquake-resistance design.
The construction of Longteng Bridge on the second-rank road between Longling and Tengchong in Yunnan Province used pre-stress concrete continuous box girder layout,the span of this bridge is 58m+102.25m+63m,the bridge construction site is located in eight degree seismic area,as a result,the design of the bridge should consider earthquake-resistance.Based on design objective of earthquake-resistance principle,earthquake-resistance analysis under the action of earthquake is conducted including natural vibration characteristics analysis,response spectrum analysis and dynamic time-history analysis,which provides the clear basis for reasonable structure earthquake-resistance design.
引文
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[2]PODOL N.The Cause of Cracking in Post Tensioned Concrete Box Girder Bridges and Retrofit Procedures[J].PCI Journal,1985,30(2):82-139
[3]CHATELA J,GODART B,DUCHENE J.Detection,Diagnosis and Monitoring of Cracked Prestressed Concrete Bridges[C].NOWAD A S.Proceedings of the NATO Advanced Research Workshop on Bridge Evaluation,Repair and Rehabilitation.Dordrecht:Kluwer Academic Publishers,1990:145-159
[4]夏修身.桥墩的弹塑性地震反应分析[D].兰州:兰州交通大学,2004
[5]张江,彭阳.底板索水平布置的连续刚构桥自振特性分析[J].黑龙江科技信息,2011(8):101-103
[6]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
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