矮塔斜拉桥设计技术研究

发布时间：2018-01-12 05:26

本文关键词：矮塔斜拉桥设计技术研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：矮塔斜拉桥是一种新兴结构型式，其受力兼具连续梁桥和斜拉桥的特点，而又不同于二者。本文希望从如下几个方面进行研究，，充分了解该桥型结构受力性能和技术特点，对要点、设计方法和成果应用进行总结，为该类型桥梁的设计技术总结经验，推动该桥型结构的发展，为跨度在100～200米的桥梁提供一种经济、美观、受力合理、安全的桥型选择。针对其较大刚度的主梁、低矮主塔、较长的无索区段、斜拉索集中在塔顶通过，塔、梁、索之间的相关关系，索塔鞍座区的受力特点方面进行了分析，主要成果有以下几个方面： 1.通过研究矮塔斜拉桥的受力原理和计算理论，计算出结构的内力和变形。同时通过对斜拉桥存在材料非线性影响和结构几何非线性影响的研究，得出对非线性问题的处理方法。 2.通过有限元程序，对不同主梁刚度、索塔高度、拉索截面积、无索区分布进行了计算分析，得出这些参数对结构整体刚度和内力的影响。 3.通过对矮塔斜拉桥孔径的布置、结构体系和主梁截面的选择、索塔的设计以及斜拉索的设计方法的研究，给出了具体的取值范围。 4.采用ANSYS大型分析软件对该桥索鞍节段进行三维有限元分析，得知了应力的变化特点。 5.采用多种结构分析程序对PC矮塔斜拉桥结构受力、动力性能进行理论分析计算，结合实体工程设计分析得出了其刚度匹配、高跨比选择、斜索区段长度的合理状态；本文的研究内容，对完善矮塔斜拉桥的设计理论、分析方法以及对桥梁技术的发展都有着非常重要的意义。
[Abstract]:The short tower cable - stayed bridge is a kind of emerging structure type , which has the characteristics of continuous beam bridge and cable - stayed bridge , and is different from the two . In this paper , we hope to study from the following aspects to fully understand the mechanical performance and technical characteristics of the bridge type structure , summarize the key points , design methods and achievements application , and provide a bridge type selection with economic , aesthetic , stress and safety for the bridge with the span of 100 - 200 meters for the bridge with the span of 100 - 200 meters . Aiming at the main beam , low main tower and long cable - free section with large rigidity , the relation between the tower top , tower , beam and cable and the stress characteristics of cable tower saddle area are analyzed . The main results are as follows : 1 . The internal force and deformation of the structure are calculated by studying the force principle and the calculation theory of the short tower cable - stayed bridge , and the method of dealing with the nonlinear problem is obtained by studying the nonlinear influence of the material nonlinearity on the cable - stayed bridge and the nonlinear influence of the structure . 2 . Through the finite element program , the stiffness , the height of the cable tower , the cross - sectional area of the cable and the distribution of the cable - free zone are calculated and analyzed , and the influence of these parameters on the overall stiffness and internal force of the structure is obtained . 3 . The design of the cable tower and the design method of the stayed cable are studied by the arrangement of the aperture of the short tower cable - stayed bridge , the selection of the structure system and the section of the main beam , the design of the cable tower and the design method of the stayed cable . 4 . Three - dimensional finite element analysis of the saddle section of the bridge is carried out by using ANSYS large - scale analysis software , and the change characteristics of stress are known . 5 . Theoretical analysis and calculation of the force and dynamic performance of PC short tower cable - stayed bridge are analyzed by various structural analysis programs . The reasonable state of rigidity matching , high - span ratio selection and length of the inclined cable section is obtained by combining the engineering design analysis . The research content of this paper is very important to perfect the design theory , the analysis method and the development of the bridge technology .

【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27

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