地震作用下曲线箱梁剪力滞效应数值分析

发布时间：2018-05-27 08:35

本文选题：曲线梁桥 + 箱形截面　；参考：《武汉工程大学》2015年硕士论文

【摘要】：曲线箱梁是在桥梁工程中广泛应用的一种桥梁形式。由于曲线箱梁上曲率的存在而带来的弯扭耦合效应会使得桥梁上的剪力滞效应十分明显,这会对桥梁安全带来一定的影响。目前,国内外学者对于曲线箱梁在静荷载作用下的剪力滞效应做了大量理论研究及模型试验,但对于地震作用下的曲线箱梁上的剪力滞效应研究鲜有涉及。而在实际工程中,地震作用会对桥梁的剪力滞效应产生重要影响。因此,本文做了如下工作:1.利用有限元分析软件ANSYS,选取了合适的有限元计算单元,分别建立了单箱单室和单箱双室的曲线箱梁有限元模型。2.选择了三条强震记录的地震波,分别沿顺向、横向以及竖向三个方向输入到所建立的两个有限元模型中,计算、分析对比并得到了地震作用下曲线箱梁顶板、底板横向剪力滞系数分布规律以及顶板、底板纵向应力分布状况。
[Abstract]:Curved box girder is widely used in bridge engineering. The coupling effect of bending and torsion caused by the curvature of curved box girder will make the shear lag effect on the bridge very obvious, which will have a certain impact on the safety of the bridge. At present, scholars at home and abroad have done a lot of theoretical research and model tests on shear lag effect of curved box girder under static load, but the research on shear lag effect on curved box girder subjected to earthquake is rarely involved. In practical engineering, seismic action will have an important impact on the shear lag effect of bridges. Therefore, this paper does the following work: 1. By using finite element analysis software ANSYS, the finite element model of curved box girder with single box, single chamber and single box with two chambers is established by selecting the appropriate finite element. Three seismic waves recorded by strong earthquakes are selected and inputted into the two finite element models along the forward, transverse and vertical directions respectively. The calculation, analysis and comparison of the roof of the curved box girder under earthquake action are made. The distribution law of transverse shear lag coefficient and the longitudinal stress distribution of roof and floor.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55

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