%0 Journal Article
%T 设计参数对刚性索自锚式悬索桥受力性能的影响分析<br>Impact analysis on mechanical behavior design parameters of self-anchored suspension bridge with rigid cable
%A 陈淮
%A 王艳
%A 朱倩&lt
%A br&gt
%A CHEN Huai
%A WANG Yan
%A ZHU Qian
%J 铁道科学与工程学报
%D 2016
%X 以平顶山市建设东路立交桥——刚性索自锚式悬索桥为实例,研究地锚式与自锚式悬索桥受力差异,探讨混凝土收缩、徐变对结构力学性能的影响,分析主缆矢跨比、主梁拱度、主梁抗弯刚度、主缆与吊杆的弹性模量等结构设计参数的变化对桥梁力学性能的影响规律。计算结果表明:中、小跨径刚性索自锚式悬索桥主梁轴力较地锚式悬索桥大很多,主梁的变形和其他内力差别不大;混凝土的收缩、徐变使主梁的变形和受力有较大程度的增加;设置主梁拱度和增大主缆弹性模量能有效降低主梁的内力和变形,结构刚度显著提高;增大主梁竖向抗弯刚度能有效控制桥梁变形但内力略有增加;增加吊杆弹性模量对桥梁的受力影响较小;增加矢跨比可加大桥梁竖向刚度但同时主梁轴向压力却相应减小,应综合选用。所得结论可为该类桥型设计提供参考。<br>Taking the overpass of Pingdingshan Jianshe road, which is a self-anchored suspension bridge with rigid cable, as an example, this paper investigated the effect of mechanical behavior of concrete shrinkage creep on the structural mechanics performance. Meanwhile, the influences of span ratio of the main cable, camber, flexural rigidity of main girder and the modulus of elasticity of cable and suspender were discussed. The results show: the main girder’s axial force of medium and small span self-anchored suspension bridge with rigid cable is greater than that of earth-anchored suspension. There are little differences between the main girder’s displacement and internal force. The theory of elasticity may be adopted to analyze self-anchored suspension bridge with rigid cable. Main girder’s displacement and internal force can be enhanced because of the concrete shrinkage creep. Setting up the main girder’s camber and amplifying the cable’s modulus of elasticity can availably reduce the main girder’s displacement and internal force, the structural stiffness can be obviously improved as well. The bridge’s displacement can be availably controlled by increasing the vertical deflection resistance stiffness, but the internal force can be slightly enlarged. The increase of the suspender''''s modulus has a little effect on bridge''''s force. The increase of cable''''s ratio of rise to span may improve bridge’s vertical deflection resistance stiffness and at same time reduce main girder’s axial force, thus it should be synthetically utilized. The conclusions can be consulted for similar bridges
%K 刚性索自锚式悬索桥
%K 设计参数
%K 力学性能
%K 有限元法&lt
%K br&gt
%K self-anchored suspension bridge with rigid cable
%K design parameters
%K mechanical property
%K finite element method
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311963