公路桥梁连梁装置研究
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摘要
连梁装置是在超出预期强度的大地震发生时,防止落梁发生的最终安全装置。结合我国公路桥梁设计和地震区划分布的特点,提出适合我国抗震设计思想的连梁装置设计方法。首先根据连梁装置的设计目的和我国新的公路桥梁抗震设计规范思想,引入桥梁重要性分类、地震动参数和桥梁地震荷载重要性系数等。根据地震荷载的冲击特性,考虑矩形脉冲的反应谱特性,最大动力放大系数取为2.0,提出了连梁装置的设计方法和设计荷载系数。最后对连梁装置的构造和设计过程进行了介绍。该设计思想和方法适合我国地震分布差异较大的特点,与我国现行公路桥梁抗震设计规范的思想一致。
Unseating prevention device(UPD) is the final safety device of the collapse prevention system for highway bridges in devastating earthquakes.The suitable design method of UPD adapting to the earthquake-resistant design thoughts of China was proposed according to the design characteristic of highway bridges and earthquake regionalization.First,based on the design aims of UPD and the thoughts of the new specifications of earthquake resistant design for highway bridges of China,importance classification of bridges,seismic parameters and seismic load importance coefficients of bridges were introduced.According to the impact characteristic of seismic load and the response spectra of rectangular impulse,the design method and the load coefficients of the devices were put forward,in which the maximum response ratio has the value of 2.0.Finally the structures and design process of the devices were introduced.The design idea and method of UPD are suitable to the seismic distribution characteristics of China and identical to the thoughts of the current specifications of earthquake resistant design for highway bridges of China.
Unseating prevention device(UPD) is the final safety device of the collapse prevention system for highway bridges in devastating earthquakes.The suitable design method of UPD adapting to the earthquake-resistant design thoughts of China was proposed according to the design characteristic of highway bridges and earthquake regionalization.First,based on the design aims of UPD and the thoughts of the new specifications of earthquake resistant design for highway bridges of China,importance classification of bridges,seismic parameters and seismic load importance coefficients of bridges were introduced.According to the impact characteristic of seismic load and the response spectra of rectangular impulse,the design method and the load coefficients of the devices were put forward,in which the maximum response ratio has the value of 2.0.Finally the structures and design process of the devices were introduced.The design idea and method of UPD are suitable to the seismic distribution characteristics of China and identical to the thoughts of the current specifications of earthquake resistant design for highway bridges of China.
引文
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[10]朱文正,刘健新,陈淮.梁桥搁置长度计算方法研究[J].世界地震工程,2004,20(3):152-155.ZHU Wenzheng,LIU Jianxin,CHEN Huai.Comparison of Cal-culation Methods for Adequate Seated Length of Beam Bridge[J].World Earthquake Engineering,2004,20(3):152-155.
[2]朱文正.公路桥梁减、抗震防落梁系统研究[D].西安:长安大学,2004.ZHU Wenzheng.Study on the Collapse-proof Systems for Bridge[D].Xi’an:Chang’an University,2004.
[3]中华人民共和国交通部.JTG D62-2004公路钢筋混凝土及预应力混凝土桥涵设计规范[S].北京:人民交通出版社,2004.P.R.China.Ministry of Communications.JTG D62-2004 Codefor Design of Highway Reinforced Concrete and PrestressedConcrete Bridges and Culverts[S].Beijing:China Commu-nications Press,2004.
[4]中华人民共和国交通部.JTJ 004-89公路工程抗震设计规范[S].北京:人民交通出版社,1989.P.R.China.Ministry of Communications.JTJ 004-89 Specifica-tions of Earthquake Resistant Design for Highway Engineering[S].Beijing:China Communications Press,1989.
[5]高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):21-25.GAO Xiaowang,BAO Aibin.The Probability Model of Earth-quake and the Statistical Parameter of It Earthquake[J].Earthquake Engineering and Engineering Vibration,1985,5(1):21-25.
[6]CLOUGH R W,PENZIEN J.Dynamics of Structures[M].3rd ed.Berkeley:Computers&Structures Inc.,1995.
[7]日本桥梁建设协会.落桥防止ミステム设计の手引き[R].东京:东京官书书普及株式会社,平成14年8月.Japan Bridge Association.Guidance for Design of Unseating Pre-vention Devices[R].Tokyo:Tokyo Publication Co,.ltd.,2002.
[8]KAWASHIMA K,PENZIEN J.Correlative Investigation on Theo-retical and Experimental Dynamic Behavior of a Model BridgeStructure[R].Report No.EERC 76-26.Berkeley:EarthquakeEngineering Research Center,University of California,1976.
[9]刘健新,胡兆同,李子青.公路桥梁减震装置及设计方法研究[R].西安:长安大学,2000.LIU Jianxin,HU Zhaotong,LI Ziqing.Research on DesignMethod and Damping Device for Bridge[R].Xi’an:Chang’an University,2000.
[10]朱文正,刘健新,陈淮.梁桥搁置长度计算方法研究[J].世界地震工程,2004,20(3):152-155.ZHU Wenzheng,LIU Jianxin,CHEN Huai.Comparison of Cal-culation Methods for Adequate Seated Length of Beam Bridge[J].World Earthquake Engineering,2004,20(3):152-155.
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