拱肋的不同宽跨比对拱桥屈曲分析的影响  

The Effect on Analysis of Buckling of Arch Rib with Different width Span Ratio

作　　者：林煌[1] 邓通发[1] 廖睿[1] 汤红华[1] Lin Huang;Deng Tongfa;Liao Rui;Tang Honghua(School of Archietctures and Surveying & Maping Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China)

机构地区：[1]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《科技通报》2016年第12期205-208,共4页Bulletin of Science and Technology

基　　金：江西省交通运输厅科技项目(2014Y0010)

摘　　要：先从拱桥屈曲的相关理论出发,分析拱桥屈曲模态的相关受力特点和失稳特征,以及影响稳定系数的相关因素。再以一座已经建成的上承式拱桥的数据出发,通过有限元分析软件Midas Civil建立有限元分析模型,分析这座桥的屈曲模态以及失稳特征。再改变拱肋的宽度,达到拱肋不同宽跨比的目的。分别建立有限元分析模型,研究不同宽跨比下的拱桥屈曲模态有何特征。在设计拱桥时该如何考虑合理的拱肋宽跨比,从最后屈曲分析的结果表明,拱肋的宽跨比对拱桥的稳定系数的影响不是线性的,而是一种非线性的影响。也就是拱桥的宽跨比存在一个合理的选择范围,这与所设计的桥的相关参数有关。此文旨在做一个基础性的研究,为日后设计拱桥时考虑合理宽跨比时提供一些理论基础。Starting from the related factors by buckling of arch bridge,and analysis buckling mode of arch bridge,its related characteristics and related factors affecting the stability.Then based on the data of the built up of a deck arch bridge, the finite element analysis model is established by the finite element analysis software Midas Civil, the buckling mode and buckling characteristics of the bridge are analyzed.And then change the width of the arch rib to achieve the purpose of different width and ratio of arch rib.The finite element analysis model is established to study the buckling mode of arch bridge with different width span ratio. In the design of arch bridge, how to consider the reasonable ratio of arch rib width to span ratio, from the final buckling analysis, the results show that the stability of arch rib is not linear, but a nonlinear effect. It is a reasonable choice of the width span ratio of arch bridge, which is related to the parameters of the bridge. This paper is intended to make a basic research to provide some theoretical basis for the design of arch bridge in the future.

关 键 词：宽跨比 桥梁稳定性 屈曲分析 失稳模态 上承式拱桥 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] TU528.59[交通运输工程—道路与铁道工程]