小半径匝道曲线梁桥地震响应分析

发布时间：2018-01-17 22:16

本文关键词：小半径匝道曲线梁桥地震响应分析　出处：《世界地震工程》2014年01期 　论文类型：期刊论文

【摘要】：针对小半径匝道曲线梁桥的桥窄、墩矮、弯扭耦合严重、地震危害明显等特点,结合某城市一座3跨连续小半径匝道曲线梁桥的工程实例,比较了单梁模型、梁格模型和实体模型在模拟小半径曲线梁桥时的精度。基于线性时程分析方法,分析了地震波输入方式、墩梁约束形式、宽度和跨径的改变对小半径匝道曲线梁桥地震响应的影响。结果表明:梁格模型较为适合于模拟小半径匝道曲线梁桥;地震波输入方式、约束形式以及宽跨的改变对小半径匝道曲线梁桥的地震响应有较大影响。
[Abstract]:Aiming at the characteristics of small radius ramp curved girder bridge, such as narrow bridge, short pier, severe coupling between bending and torsion, and obvious seismic hazard, the single beam model is compared with an engineering example of a 3-span continuous small radius ramp curved girder bridge in a certain city. The accuracy of beam model and solid model in simulating small radius curved beam bridge is analyzed. Based on linear time-history analysis, the input mode of seismic wave and the constraint form of pier and beam are analyzed. The effect of width and span on the seismic response of curved beam bridge with small radius ramp is studied. The results show that the beam lattice model is more suitable for simulating the curve beam bridge with small radius ramp. The seismic response of curved girder bridge with small radius ramp is greatly affected by the input mode of seismic wave, the constraint form and the change of wide span.
【作者单位】：南京工业大学土木工程学院;
【基金】：江苏省自然科学基金资助项目(BK2011803)
【分类号】：U442.55
【正文快照】： 引言随着现代交通网的发展,曲线桥特别是小半径曲线梁桥以其灵活的线型、美观的外型、较短的展线长度及良好的行车条件等优点,被越来越多地应用于城市道路建设,其中,在城市立交桥的匝道设计中,曲线桥的应用尤为广泛。对于曲线桥的静力特性,国内外学者做了大量的分析,形成了有

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