小半径城市高架曲线梁桥地震动响应研究

戴公连;刘文硕;曾敏

振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 155-160.

PDF(2276 KB)
PDF(2276 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 155-160.
论文

小半径城市高架曲线梁桥地震动响应研究

  • 戴公连1;刘文硕1;曾敏2
作者信息 +

Parametric analysis on seismic response of small-radius curved bridge under earthquake

  • Dai Gong-lian1;LIU Wen-shuo1;ZENG Min2
Author information +
文章历史 +

摘要

针对城市高架小半径曲线梁桥弯扭耦合严重、地震危害明显的特点,对武汉新站小半径曲线梁桥的有效的动力计算模型进行了探讨,比较了单根梁模型、板壳模型和脊梁模型在模拟小半径曲线桥时的准确性和精度。在脊梁模型的基础上,基于时程分析方法,采用三向地震波同时输入的方式,分析了小半径曲线桥的动力特性及其地震响应的主要影响因素。分析结果表明:脊梁模型是对小半径曲线桥进行动力分析的有效实用方法;后续结构、桩-土-桥的相互作用、桥墩刚度及支座偏心等敏感因素对小半径曲线桥的地震响应有较大的影响,计算分析时应给予足够重视

Abstract

In facing of the severe bending-torsion coupling and noticeable earthquake damage of the small-radius curved bridge in urban viaducts, the reasonable and effective dynamic FE models of this kind of bridge were discussed, and the accuracy as well as validity of three models (shell element model, single beam model and the spine-like beam model) have been compared. On the basis of spine-like beam model, the time-history analysis method and multiple earthquake excitations are adopted, by which the dynamic properties and the dominating seismic influencing factors of the small-radius curved bridge are analyzed. The analysis results indicate that the spine-like beam model can be regarded as an effective and practical method when carrying out dynamic analysis on the small-radius curved bridge. Besides, it is proved that the adjacent structure, pile-soil-structure interaction, pier rigidity as well as bearing eccentricity have a huge influence on the small-radius curved bridge, to which should be paid enough attention during design and analysis.

关键词

动力特性 / 地震响应 / 时程分析方法 / 小半径曲线弯梁 / 有效模型

Key words

dynamic features / seismic response / time-history method / small-radius curved bridge / effective model

引用本文

导出引用
戴公连;刘文硕;曾敏. 小半径城市高架曲线梁桥地震动响应研究[J]. 振动与冲击, 2012, 31(2): 155-160
Dai Gong-lian;LIU Wen-shuo;ZENG Min. Parametric analysis on seismic response of small-radius curved bridge under earthquake[J]. Journal of Vibration and Shock, 2012, 31(2): 155-160

PDF(2276 KB)

Accesses

Citation

Detail

段落导航
相关文章

/