连续梁桥纵桥向位移需求的计算方法研究
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摘要
该文在考虑连续梁桥滑动支座墩滑动摩擦效应的基础上,求出了全桥纵桥向的等效周期和等效阻尼比,将连续梁桥在纵桥向等效为单自由度体系。根据单自由度体系在地震作用下位移需求的计算方法,提出了连续梁桥在地震作用下位移需求的简化方法。最后给出了该方法的算例,并采用非线性时程分析进行了检验,结果表明简化方法有效。
On the basis of considering the gliding friction effect of continuous beam bridge gliding abutment pier,the article seeks the longitudinally equivalent cycle and equivalent damp ratio of the whole bridge,and makes the continuous beam bridge being the one degree of freedom system at the longitudinal effect of bridge.Based on the calculation method of displacement demand for one degree of freedom system under the earthquake action,the article puts forward the simplifying method of displacement demand for the continuous beam bridge under earthquake action,and finally gives the example of this method,and uses the non-linear time-history analysis to carry out the inspection. The result makes clear that the simplifying method is effective.
On the basis of considering the gliding friction effect of continuous beam bridge gliding abutment pier,the article seeks the longitudinally equivalent cycle and equivalent damp ratio of the whole bridge,and makes the continuous beam bridge being the one degree of freedom system at the longitudinal effect of bridge.Based on the calculation method of displacement demand for one degree of freedom system under the earthquake action,the article puts forward the simplifying method of displacement demand for the continuous beam bridge under earthquake action,and finally gives the example of this method,and uses the non-linear time-history analysis to carry out the inspection. The result makes clear that the simplifying method is effective.
引文
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[4]郭磊,桥梁结构基于位移的抗震设计方法研究[D].上海:同济大学,2006.
[5]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].
[6]Takeda.T,Sozen.M.and Nielsen.N.Reinforced Concrete Response to Simulated Earthquakes[J].Journal of the Structural Division,ASCE 1970,96(12):2557-2573.
[2]Fajfar P.and Krawinkler H..Seismic design methodologies for the next generation of codes[M].Seismic Design Practice into the Next Century,Balkema:Booth,1998.
[3]Sozen M A.Review of earthquake response of R C buildings with a view to drift control[A].State of the Art in Earthquake Engineering [C],1981,Ankara:383-418.
[4]郭磊,桥梁结构基于位移的抗震设计方法研究[D].上海:同济大学,2006.
[5]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].
[6]Takeda.T,Sozen.M.and Nielsen.N.Reinforced Concrete Response to Simulated Earthquakes[J].Journal of the Structural Division,ASCE 1970,96(12):2557-2573.
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