铁路空心墩抗震性能的拟静力试验研究

发布时间：2018-06-04 20:29

本文选题：铁路 + 空心墩　；参考：《地震工程学报》2014年01期

【摘要】：铁路桥梁空心墩在铁路建设中普遍使用,空心墩与实体墩有较大差异,空心墩塑性铰区域的长度能否直接采用实体墩的研究结果尚不明确,采用缩尺模型进行模拟试验是一种比较理想的手段。本文以大瑞铁路的空心桥墩为原型,制作了3个大比例尺的缩尺模型,采用拟静力试验方法进行了截面合理配筋、地震破坏模式及塑性铰区域长度研究,得到了空心高墩在水平反复荷载作用下的骨架曲线、滞回曲线、塑性铰区长度及破坏特征。试验结果表明,现有设计配筋率下模型桥墩呈现延性破坏,破坏特征体现为混凝土的压碎,有明显的塑性铰区域;模型桥墩的塑性铰区域长度与墩底截面受力方向尺寸相近。采用数值模拟得到单调加载骨架曲线和试验骨架曲线,与试验得到曲线能较好地吻合。
[Abstract]:Hollow piers of railway bridges are widely used in railway construction, and there are great differences between hollow piers and solid piers. The results of research on whether the length of plastic hinge region of hollow piers can be directly used as solid piers are not clear. It is an ideal method to use scale model for simulation test. In this paper, the hollow piers of Da-Rui Railway are taken as the prototype, three large scale models are made, and the reasonable section reinforcement, earthquake failure mode and plastic hinge region length are studied by quasi-static test method. The skeleton curve hysteretic curve plastic hinge region length and failure characteristics of hollow high pier under horizontal repeated load are obtained. The test results show that the ductile failure of the model pier is shown under the existing reinforcement ratio, and the failure characteristic is the crushing of concrete with obvious plastic hinge region, and the length of the plastic hinge region of the model pier is similar to the dimension of the bearing direction of the section at the bottom of the pier. The monotone loading skeleton curve and the experimental skeleton curve are obtained by numerical simulation, which are in good agreement with the experimental results.
【作者单位】：中铁二院工程集团有限责任公司;
【分类号】：U443.22;U442.55

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