【作者】 张威威；

【导师】 黄才良；

【作者基本信息】 大连理工大学 ， 桥梁与隧道工程， 2012， 硕士

【摘要】 自锚式悬索桥在中小跨径桥梁中是很有竞争力的桥型。庄河市建设大街东桥是一座中跨跨径为200米的混凝土自锚式悬索桥。本文以此桥为工程背景,利用专业有限元软件MIDAS CIVIL建立了全桥空间有限元模型,对全桥进行了分析和设计研究。本文的主要内容如下：(1)以工程为背景,建立了全桥空间有限元模型。分析了三种主缆线形计算方法,在此基础上计算了初步成桥主缆线形并且对结果进行了分析和对比,通过对比三种方法选择了合适的方法对成桥主缆线形进行了精确分析。(2)利用MIDAS CIVIL建立了全桥空间有限元模型,分析了结构在恒载作用下的主缆、吊杆、主梁、桥塔受力情况；同时分析了结构在包括车载和温度作用下对桥梁主要构件的影响；考虑混凝土材料的收缩和徐变的非线性影响作用,分析了结构在时间影响下的非线性影响。(3)通过建立结构动力分析的有限元模型,计算得到了自锚式悬索桥的自振频率和振型,同时分析了恒载、桥塔和加劲梁刚度等参数变化对自振特性的影响作用。更多还原

【Abstract】 Self-anchored suspension bridge type is very competitive in the Small and Medium Bridges. Zhuanghe City, the construction of Main Street East Bridge is the one in the span of200meters of concrete self-anchored suspension. This article in order to bridge engineering background, the use of specialized finite element software of MIDAS CIVIL finite element model of the space of the full-bridge, full bridge analysis and design. The main content is as follows:(1) Taking the project as the background, has established the entire bridge spatial finite element model. Analyzes the three main cable form calculation method, on the basis of preliminary calculation bridge cable to form and the results are analyzed and compared, by comparing the three methods to choose the suitable method to the cable bridge form accurately the analysis.(2) Through the MIDAS CIVIL has established the entire bridge space finite element model, analyses the structure in the constant load of the main cables, the boom, girders, tower bridge force; The analysis on the structure including the on-board and temperature effect in under the influence of the main components of bridge; Consider of concrete material shrinkage and creep of the nonlinear effect function, analyzed the structure in the time of the nonlinear effect under the influence.(3) Through the establishment of the structural dynamic analysis of finite element model, calculated by the self-anchored suspension bridge natural frequencies and mode shapes, and dead loads, the bridge towers and stiffening girder stiffness parameters on the vibration characteristics更多还原