离差最大化在连续刚构桥抗震性能设计参数的应用
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摘要
连续刚构桥具有刚度大、抗震性能好、造型美观、行车舒适等优点,因此,连续刚构桥越来越受到广大设计者青睐。然而在实际桥梁工程设计时,往往出现某些关键截面的性能不能满足抗震要求,需要调整设计参数以达到其抗震性能要求。运用离差最大化法的原理,以拟建的可克达拉大桥为例,计算各关键设计参数的权重及抗震性能方案评价值。结果表明:梁跨中高跨比、高低墩及桥墩截面形式权重极差最大,对抗震性能影响最为显著,为大跨度连续刚构桥优化设计提供参考。
Continuous rigid frame bridge has good more stiffness good more antseismis capacity,beautiful modeling,comfortable driving and so on.As a result of this,continuous rigid frame has got a really nice reception at bridge designers.But in the actual of bridge designering,it is usually occurred that the key section isn't subject to the request of antseismis capacity,which needs to adjust the design parameters.The objective of this study is to use maximizing difference principle to give a evaluation to the main design parameters of continuous ridge frame.It is found that the beam across different high ratio,high and low piers and bridge pier cross-section form are the largest weight,Pier top girder shear and pier bottom section shear should be a priority to meet the requirements of seismic performance;It is reduced the ambiguity of the adjust to change design parameters.This matter helps designers to create continuous rigid frame bridge fastly and efficiently.
Continuous rigid frame bridge has good more stiffness good more antseismis capacity,beautiful modeling,comfortable driving and so on.As a result of this,continuous rigid frame has got a really nice reception at bridge designers.But in the actual of bridge designering,it is usually occurred that the key section isn't subject to the request of antseismis capacity,which needs to adjust the design parameters.The objective of this study is to use maximizing difference principle to give a evaluation to the main design parameters of continuous ridge frame.It is found that the beam across different high ratio,high and low piers and bridge pier cross-section form are the largest weight,Pier top girder shear and pier bottom section shear should be a priority to meet the requirements of seismic performance;It is reduced the ambiguity of the adjust to change design parameters.This matter helps designers to create continuous rigid frame bridge fastly and efficiently.
引文
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[7]牛俊武.桥跨结构设计参数对高墩连续刚构桥抗震性能影响的分析[D].西安:长安大学,2004.
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[10]张会玲,秦建国.预应力混凝土连续梁桥设计参数抗震性能研究[J].公路,2013,2(2):113-117.
[11]王应明.运用离差最大化方法进行多指标决策与排序[J].系统工程与电子技术,1998,20(7):24-26.
[2]JTG/TB02-01-2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[3]马宝林.高墩大跨连续刚构桥[M].北京:人民交通出版社.
[4]邬晓光,等.刚架桥[M].北京:人民交通出版社.
[5]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社.
[6]周勇军.高墩大跨曲线连续刚构桥地震响应的设计参数研究[D].西安:长安大学,2006.
[7]牛俊武.桥跨结构设计参数对高墩连续刚构桥抗震性能影响的分析[D].西安:长安大学,2004.
[8]Li Y L,Chen N,Zhao K,et al.Seismic response analysis of vehicle-bridge system for continous rigid frame bridge with high piers[J].Earthquake Engineering and Engineering Vibration,2012,11(4):593-602.
[9]靳启文.连续刚构桥抗震性能关键参数研究[D].西安:长安大学,2012.
[10]张会玲,秦建国.预应力混凝土连续梁桥设计参数抗震性能研究[J].公路,2013,2(2):113-117.
[11]王应明.运用离差最大化方法进行多指标决策与排序[J].系统工程与电子技术,1998,20(7):24-26.
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