三跨连续曲线宽箱梁力学特性有限元分析与模型试验

发布时间：2018-05-06 18:07

本文选题：连续曲线宽箱梁 + 不均匀受力　；参考：《建筑科学与工程学报》2015年06期

【摘要】：基于梁格法、有限单元法以及比拟正交异性板法的基本原理,针对曲线宽箱梁特殊的截面特点,建立了一种简单实用又具有足够精度的改进梁格法,即比拟板-梁格法,并提出该方法用于梁格划分以及截面特性计算的一般方法;同时,模拟实际工程,建立曲线宽箱梁桥的传统梁格模型、比拟板-梁格模型以及精细的三维实体有限元模型,研究曲线宽箱梁在不同荷载作用下的空间受力情况及内力横向传递机制;制作三跨连续曲线宽箱梁桥的有机玻璃模型,采用静力加载的方式来测得曲梁控制截面上的应变和挠度,并提出用不均匀系数来表达曲线桥的不均匀受力;将试验结果与有限元模型的计算结果进行比较分析,验算比拟板-梁格模型的计算精度及实用性,同时得到了连续曲线宽箱梁的应力与挠度横向分布规律。结果表明:比拟板-梁格模型的计算精度高于传统梁格模型,同实体单元法相比,比拟板-梁格法的模型简单且计算方便,便于工程设计应用。
[Abstract]:Based on the basic principles of beam lattice method, finite element method and orthotropic plate method, a simple, practical and accurate improved beam method, I. e., analogy plate beam lattice method, is established according to the special section characteristics of curved wide box girder. At the same time, the traditional girder and lattice model of curved wide box girder bridge, the slab-girder model and the fine three-dimensional solid finite element model are established by simulating the practical engineering. The space force and lateral transfer mechanism of curved wide box girder under different loads are studied, and the organic glass model of three span continuous curved wide box girder bridge is made. The strain and deflection on the control section of the curved beam are measured by static loading, and the non-uniform coefficient is proposed to express the non-uniform force of the curved bridge, and the experimental results are compared with the calculated results of the finite element model. The accuracy and practicability of the plate-girder model are compared and the transverse distribution of stress and deflection of continuous curved wide box girder is obtained. The results show that the precision of the model is higher than that of the traditional one. Compared with the solid element method, the model is simple and convenient for engineering design.
【作者单位】：中南林业科技大学土木工程与力学学院;
【基金】：湖南省交通科技计划项目(201222) 中南林业科技大学研究生科技创新基金项目(CX2013Z36)
【分类号】：U448.213;U441

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