高速铁路圆端形空心桥墩抗震性能试验研究

发布时间：2018-03-22 10:10

本文选题：高速铁路　切入点：空心桥墩　出处：《工程力学》2014年03期 　论文类型：期刊论文

【摘要】：以高速铁路中采用的圆端形空心桥墩为原型,设计了10根大比例模型。考虑恒定轴向力的作用,进行低周反复荷载试验,得到不同桥墩模型的破坏特性、滞回曲线,依此分析各参数下桥墩的延性及耗能性能,并利用两种典型的抗剪公式对模型的抗剪承载力进行评估。试验结果表明,该类桥墩均为弯曲型破坏,墩底普遍有弯剪斜裂缝。滞回曲线捏缩效应明显并且骨架曲线从开裂到屈服上升缓慢。随着轴压比的提高,模型的弯曲强度有所增大,延性下降。由于模型的体积配箍率均较低,其对延性的影响不明显。纵筋率对滞回曲线形状影响较大,增加纵筋率耗能能力随之增大。
[Abstract]:Round end by high-speed railway in the hollow pier as the prototype, designed 10 large scale model. Considering the constant axial force and cyclic loading test, failure characteristics of different pier models, hysteretic curve, ductility and energy dissipation performance based on the analysis results of the parameters under the pier, and used two the typical model of the shear formula of shear bearing capacity is evaluated. The experimental results show that this kind of pier is flexural failure, the bottom of the pier are flexural shear crack. The hysteretic curves and skeleton curves of obvious rheostriction from cracking to yield increased slowly. With the increase of axial compression ratio, bending strength the model increases, the ductility decreases. The volume ratio of hoop model are relatively low, the effect is not obvious. On the ductility of longitudinal reinforcement ratio on the hysteretic curve shape influence, the increase in longitudinal reinforcement increases rate of energy dissipation.

【作者单位】：中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：铁道部重大科技攻关项目(2009G-024) 国家留学基金项目(CSC)
【分类号】：U442.55

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