减震体系梁桥在地震与爆炸组合作用下的性能研究
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摘要
以某减震体系梁桥为研究对象,通过比较分析地震荷载单独作用和地震与爆炸组合作用下墩底的弯矩和支座的最大位移及残余位移,研究爆炸冲击对地震中受损的桥梁构件的影响。结果表明,地震后的爆炸冲击会瞬时增大桥墩的弯矩甚至使其屈服,导致屈服墩墩顶的支座残余位移增大50%以上。
Taken an girder bridge with seismic isolation system as the research object,through analyzing the bending moment at the bottom of piers,the maximum displacement and residual displacement under earthquake compared to the combination of earthquake and explosion,the effect of blast to the damaged bridge structures in the earthquake is studied. The result shows that the blast could magnify the bending moment of piers instantly and even make them yield,which leads to an over 50% increase in the displacement of bearings at the top of the yielded piers.
Taken an girder bridge with seismic isolation system as the research object,through analyzing the bending moment at the bottom of piers,the maximum displacement and residual displacement under earthquake compared to the combination of earthquake and explosion,the effect of blast to the damaged bridge structures in the earthquake is studied. The result shows that the blast could magnify the bending moment of piers instantly and even make them yield,which leads to an over 50% increase in the displacement of bearings at the top of the yielded piers.
引文
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[15]赵德芳,李昶,刘忾.FRP格栅加筋混凝土梁试验研究[J].山东交通学院学报,2012,20(2):41-45.
[2]赵鹍鹏,虞建成.桥梁全寿命设计方法的现状及前景[J].山东交通学院学报,2009,17(4):53-57.
[3]GEORGE C L,ZACH L.A Frame Work for Development of Muti-hazard Load and Resistance Factor Design[R].Buffalo,New York,US:MCEER Technical Report,MCEER-11-0007,2011.
[4]孙得璋,孙柏涛,GEORGE C Lee.基于Ferry Borges理论的地震与重卡车作用下桥梁内力的组合问题[J].地震工程与工程振动,2011,31(6):18-23.
[5]孙得璋,孙柏涛,GEORGE C Lee.桥梁多灾害设计荷载系数确定方法探讨[J].土木工程学报,2012,45(S2):76-79.
[6]ALIPOUR A,SHAFEI B,SHINOZUKA M.Reliability-Based Calibration of Load and Resistance Factors for Design of RC Bridges under Multiple Extreme Events:Scour and Earthquake[J].Journal of Bridge Engineering,2012,18(5):362-371.
[7]张帆.为花炮运输安全加码"探班"世界首台防爆型烟花爆竹专用运输车[J].湖南安全与防灾,2013(4):34-35.
[8]ZHAI Changhai,WEN Weiping,CHEN Zhiqiang,et al.Damage Spectra for the Mainshock-Aftershock Sequence-Type Ground Motions[J].Soil Dynamics and Earthquake Engineering,2013(45):1-12.
[9]ANIL K Chopra,RAKESH K Goel.A Modal Pushover Analysis Procedure to Estimate Seismic Demands for Buildings:Theory and Preliminary Evaluation[R].California Berkeley:Pacific Earthquake Engineering Research Report,2001.
[10]叶爱君,管仲国.桥梁抗震[M].2版.北京:人民交通出版社,2002.
[11]中华人民共和国建设部.GB 50038—2005人民防空地下室设计规范[S].北京:中国建筑标准设计研究院,2005.
[12]龚顺风,朱升波,张爱晖,等.爆炸荷载的数值模拟及近爆作用钢筋混凝土板的动力响应[J].北京工业大学学报,2011,37(2):199-205.
[13]李立勇.防止工程结构连续倒塌的概念控制[J].山东交通学院学报,2012,20(4):47-51.
[14]刘晓鹏,蒋峰.碳纤维在旧桥加固中的应用[J].山东交通学院学报,2007,15(2):66-68.
[15]赵德芳,李昶,刘忾.FRP格栅加筋混凝土梁试验研究[J].山东交通学院学报,2012,20(2):41-45.
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