混凝土箱梁独塔斜拉桥分析和索塔锚固结构详细分析

发布时间：2019-05-13 08:01

【摘要】：论文以130m+130m跨径独塔斜拉桥为工程背景,进行混凝土箱梁独塔斜拉桥方案设计,计算分析了该桥在运营阶段的静动力效应,详细计算了索塔锚固结构的局部应力分布。论文首先介绍了国内几座典型混凝土独塔斜拉桥,概述索塔锚固典型结构。其次,运用桥梁专业计算软件MIDAS/CIVIL2012建立基于梁单元的全桥空间有限元模型,计算了桥梁在运营阶段恒载以及恒载与活载、横向风荷载和温度变化等组合作用下的变形和应力。对成桥状态进行自振特性分析,并分别采用反应谱方法和时程方法计算分析该桥梁的地震响应。最后,利用有限元软件ALGOR建立基于组合单元的全桥空间详细模型,其中对索塔锚固结构进行单元细化；运用该模型,计算分析了恒载作用和恒载与活载共同作用下索塔锚固结构的详细应力,并提出索塔锚固结构优化设计意见。
[Abstract]:In this paper, based on 130m 130m span single tower cable-stayed bridge, the scheme design of concrete box girder single tower cable-stayed bridge is carried out, the static and dynamic effects of the bridge in operation stage are calculated and analyzed, and the local stress distribution of cable tower anchoring structure is calculated in detail. Firstly, several typical concrete single-tower cable-stayed bridges in China are introduced, and the typical anchoring structures of cable-tower are summarized. Secondly, the spatial finite element model of the whole bridge based on beam element is established by using the bridge professional calculation software MIDAS/CIVIL2012, and the deformation and stress of the bridge under the action of dead load, dead load and live load, transverse wind load and temperature change are calculated. The natural vibration characteristics of the bridge are analyzed, and the seismic response of the bridge is calculated and analyzed by the response spectrum method and the time history method, respectively. Finally, the finite element software ALGOR is used to establish the detailed model of the whole bridge space based on the combined element, in which the anchor structure of the cable tower is refined. By using this model, the detailed stress of cable tower anchoring structure under the action of dead load and live load is calculated and analyzed, and the optimization design suggestion of cable tower anchoring structure is put forward.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27

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