多维地震作用下的桥墩结构抗震性能响应分析

发布时间：2018-01-20 04:21

本文关键词： OpenSees 空心桥墩动力分析推倒分析　出处：《河北工程大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文中，对钢筋混凝土空心桥墩模型进行静力Pushover分析和动力时程分析，采用的软件是有限元分析软件OpenSees。模型的建模是根据已做过的试验中所采用模型来进行的，然后对模型进行静力Pushover分析来比较模型的承载能力和延性的大小，再对模型进行动力时程分析，比较不同模型的时程曲线，对比不同模型在多维地震动作用下的抗震性能表现，找出不同结构参数对结构模型在多维地震动作用下抗震性能的影响。地震发生时的地面运动是的三维的，关于多维地震动的研究也越来越多，，越来越必要。通过地面运动的地震波是非常复杂的，每个点的振动速度，振动周期与振动相位是不同的。由于地面上的各个质点间运动的差别，可使地面不但产生三个平动分量，而且还产生三个转动分量。本文进行的动力分析是对空心桥墩模型同时施加三个方向的地震动，即一个竖向和两个水平正交方向同时对空心桥墩进行地震动响应分析。因此，本文采用了OpenSees软件，用于空心桥墩模型的抗震性能在多维地震反应分析，分析结果具有一定的研究意义。本文进行了如下几个方面的工作： 1.通过空心桥墩的破坏形式分析，了解可能会影响桥墩抗震性能的一些因素。 2.以实验实例为模型建立相应的OpenSees数值模型，并与实验结果对比，验证OPENSEES模拟计算的精确性。 3.采用OpenSees软件，对模型进行静力分析和动力时程分析，研究在不同的轴压比，配筋率，高宽比，体积配箍率对桥墩的抗震性能的影响。
[Abstract]:In this paper, static Pushover analysis and dynamic time history analysis of reinforced concrete hollow pier model are carried out. The software used is the finite element analysis software OpenSees. the modeling of the model is based on the model used in the experiments. Then the static Pushover analysis is carried out to compare the bearing capacity and ductility of the model, and then the dynamic time history of the model is analyzed to compare the time history curves of different models. By comparing the seismic behavior of different models under the action of multi-dimensional ground motion, the influence of different structural parameters on the seismic performance of the structural model under the action of multi-dimensional ground motion is found out. The ground motion is three-dimensional when the earthquake occurs, and the research on multi-dimensional ground motion is more and more necessary. The seismic wave passing through the ground motion is very complicated, and the vibration velocity of each point is very complex. The period of vibration is different from the phase of vibration. Due to the difference of motion between different particles on the ground, not only three moving components can be produced on the ground. In addition, three rotational components are produced. The dynamic analysis in this paper is to apply three directions of ground motion to the model of hollow bridge pier at the same time. One vertical and two horizontal orthogonal directions are used to analyze the ground motion response of hollow piers at the same time. Therefore, OpenSees software is used to analyze the seismic behavior of hollow pier model in multi-dimensional seismic response analysis. The results of the analysis are of certain significance. In this paper, the following aspects of work are carried out: 1. Through the analysis of the failure form of hollow piers, some factors which may affect the seismic performance of piers are understood. 2. Taking the experimental example as the model, the corresponding OpenSees numerical model is established, and compared with the experimental results, the accuracy of the OPENSEES simulation calculation is verified. 3. The influence of axial compression ratio, reinforcement ratio, aspect ratio and volume hoop ratio on the seismic performance of pier is studied by using OpenSees software.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55;U443.22

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