单跨混凝土曲线梁桥地震反应简化计算方法
|
摘要
曲线梁桥兼具建筑美学以及能很好地适应地形、地物限制条件的优点,在国内外城市高架桥梁、立交工程及高等级公路中得到了广泛应用。然而,历次破坏性地震中,曲线梁桥屡有出现严重震害甚至垮塌的现象,表明其抗震设计问题迄今未得到很好的解决。本文以公路单跨混凝土曲线梁桥为研究对象,建立基准有限元模型,通过参数分析,系统研究了曲率半径、跨宽比、跨高比和跨径等主要设计参数对单跨曲线梁桥地震反应的影响规律,进而给出单跨曲线梁桥可采用"以直代曲"方法进行地震反应简化计算的条件,并提出适用于不规则单跨曲线梁桥地震反应的简化计算方法。
The curved girder bridges are used widely in city viaducts,interchanges and hig h-grade highway in China and abroad for its structural advantages and architect ural aesthetics.However,severe damage even collapses of curved girder bridges were often occurred during the past damage earthquakes.This implies that the pr oblem of seismic design of curved girder bridges has not been solved perfectly. In this paper,the finite element model of a typical single-span concrete curve d girder bridge is built for numerical analysis.The parameter analysis method i s employed in the numerical analysis to study the effects of main design paramet ers,such as curvature radius,span-width ratio,span-depth ratio and span,on the seismic response of single-span curved girder bridges.The center angle li mits of a single-span curved girder bridge which can be seen as a regular bridg e are given.A simplified method for calculation the seismic response of a irreg ular single-span curved girder bridge is also proposed.
The curved girder bridges are used widely in city viaducts,interchanges and hig h-grade highway in China and abroad for its structural advantages and architect ural aesthetics.However,severe damage even collapses of curved girder bridges were often occurred during the past damage earthquakes.This implies that the pr oblem of seismic design of curved girder bridges has not been solved perfectly. In this paper,the finite element model of a typical single-span concrete curve d girder bridge is built for numerical analysis.The parameter analysis method i s employed in the numerical analysis to study the effects of main design paramet ers,such as curvature radius,span-width ratio,span-depth ratio and span,on the seismic response of single-span curved girder bridges.The center angle li mits of a single-span curved girder bridge which can be seen as a regular bridg e are given.A simplified method for calculation the seismic response of a irreg ular single-span curved girder bridge is also proposed.
引文
[1]孙建鹏,李青宁.曲线箱梁桥地震反应的频域精细传递矩阵法[J].地震工程与工程振动,2009,29(4):139-146.
[2]王丽,周锡元,闫维明.曲线梁桥地震响应的简化分析方法[J].工程力学,2006,23(6):77-83.
[3]刘保纲,郭咏辉.曲线箱梁桥的地震反应分析[J].土木工程学报,2003,23(10):56-59.
[4]Nicholas J Burdette,Amr S Elnashai,Alessio Lupoi,et al.Effect of asynchronous earthquake motion oncomplex bridges.Ⅰ:methodology and input motion[J].Journal of Bridge Engineering,2008,13(2):158-165.
[5]朱东生,刘世忠,虞庐松.曲线桥地震反应研究[J].中国公路学报,2002,15(3):42-48.
[6]Desroches R,Fenves G L.Evaluation of recordedearthquake response of a curved highway bridge[J].Earthquake Spectra,1997,3(3):363-386.
[7]安瑞晶.设计参数对大跨径预应力混凝土连续梁桥地震响应影响分析[D].西安:长安大学,2005.
[8]Abdel-Salam M N,Heins C P.Seismic response ofcurved steel box girder bridges[J].Journal of Struc-tural Engineering,1988,114(12):2790-2800.
[9]Standard Specifications for Highway Bridges-16th Edi-tion[S].
[10]Caltrans Seismic Design Criteria.Memo to Designers20-1[S].
[11]Transit New Zealand,Opus International Consultants.Bridge Manual[M].Wellington:Transit New Zealand,2003.
[12]JTG/T B02-012008,公路桥梁抗震设计细则[S].
[13]魏双科.曲线梁桥的固有振动特性及地震反应分析[D].南京:南京工业大学,2006.
[14]金菊,王淑涛.中小跨径曲线梁桥半径变化对结构变形的影响分析[J].河北工业大学学报,2007,36(4):110-113.
[15]孙颖.混凝土曲线梁桥简化抗震设计方法研究[D].福州:福州大学,2010.
[2]王丽,周锡元,闫维明.曲线梁桥地震响应的简化分析方法[J].工程力学,2006,23(6):77-83.
[3]刘保纲,郭咏辉.曲线箱梁桥的地震反应分析[J].土木工程学报,2003,23(10):56-59.
[4]Nicholas J Burdette,Amr S Elnashai,Alessio Lupoi,et al.Effect of asynchronous earthquake motion oncomplex bridges.Ⅰ:methodology and input motion[J].Journal of Bridge Engineering,2008,13(2):158-165.
[5]朱东生,刘世忠,虞庐松.曲线桥地震反应研究[J].中国公路学报,2002,15(3):42-48.
[6]Desroches R,Fenves G L.Evaluation of recordedearthquake response of a curved highway bridge[J].Earthquake Spectra,1997,3(3):363-386.
[7]安瑞晶.设计参数对大跨径预应力混凝土连续梁桥地震响应影响分析[D].西安:长安大学,2005.
[8]Abdel-Salam M N,Heins C P.Seismic response ofcurved steel box girder bridges[J].Journal of Struc-tural Engineering,1988,114(12):2790-2800.
[9]Standard Specifications for Highway Bridges-16th Edi-tion[S].
[10]Caltrans Seismic Design Criteria.Memo to Designers20-1[S].
[11]Transit New Zealand,Opus International Consultants.Bridge Manual[M].Wellington:Transit New Zealand,2003.
[12]JTG/T B02-012008,公路桥梁抗震设计细则[S].
[13]魏双科.曲线梁桥的固有振动特性及地震反应分析[D].南京:南京工业大学,2006.
[14]金菊,王淑涛.中小跨径曲线梁桥半径变化对结构变形的影响分析[J].河北工业大学学报,2007,36(4):110-113.
[15]孙颖.混凝土曲线梁桥简化抗震设计方法研究[D].福州:福州大学,2010.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心