板式无砟轨道毕业论文设计

摘要

无砟轨道可以分为预制混凝土板式和现浇混凝土式两种。在我国，形成技术体系并且纳入技术要求规范的是预制混凝土板式，主要包括单元板式（CRTS I型）和纵连板式（CRTS II型）两种类型。跟随国际步伐结合我国的基本国情，无砟轨道现已大量投入建设。为保证轨道结构在运营中的安全性和使用性，有必要对无砟轨道结构进行合理设计。

本文以CRTS I型无砟轨道作为研究对象，进行加载作用下的力学数值进行分析和结构设计。设计程序如下：CRTS I型无砟轨道的结构形式和几何尺寸确定；运用ANSYS 软件和掌握的结构形式和几何尺寸进行有限元模型的创建，并且对所建模型进行加载求解；在加载下对力学数值分析，根据数值对横截面进行配筋计算，使其的强度和刚度达到模型要求，达到对模型的设计以及检算的任务；对不同地基系数下的轨道结构进行力学分析；最后对CRTS I型板式无砟轨道的施工技术进行陈述。

分析结果表明无砟轨道高平顺性、高稳定必须依赖基础的刚度、砂浆的特性以及轨道板和底座的结构尺寸和配筋，不同的地基系数和支撑层刚度下轨道形变和受力表现出极大的不同。无砟轨道建设必须加强这些重要环节的质量控制。

关键词：CRTS I型板式无砟轨道；有限元；结构设计；施工技术

Abstract

Non-ballasted track can be divided into pre-cast concrete slab and in-situ concrete. In China, the formation of technical systems and technical requirements specification is included in the precast concrete slab, including cell plate (CRTS I type) and the vertical connecting plate (CRTS II type). Combined with the international pace of China's basic national conditions, non-ballasted track has a lot to invest in construction. Track structure in order to ensure operational safety and usability, it is necessary to carry out reasonable non-ballasted track structure design reasonable.

In this paper, it take CRTS I plate-type non-ballasted track as an object of study, carried out under the action of mechanical loading numerical analysis and reinforcement design calculations, the main research work as flowing: According to CRTS I -type non-ballasted track of development, formed technologies as well as incorporating the requirements of standards to understand the tie track structure and geometry of CRTS I –type. Using ANSYS software and master of the structure and geometry of the finite element model creation, and loaded on the model solution. Under mechanical loading numerical analysis, based on the numerical calculations for the cross section of reinforcement to achieve the strength and stiffness of the model requires. Numerical analysis based on different foundation coefficient. Finally, give a statement of standardized construction methods, construction techniques and other safety matters enumerated in detail.

The results show that non-ballasted track high smoothness, high stability must rely on foundation stiffness characteristics of mortar and track the production process and the base plate. Non-ballasted track construction must strengthen the quality control of these important aspects.

Keywords: CRTS I type of slab track, finite element modeling, design reinforcement calculation, construction technology

目录

摘要 .................................................................... I ABSTRACT ................................................................ II 第一章绪论 (1)

第一节引言 (1)

第二节无砟轨道介绍 (1)

一、无砟轨道结构特点 (1)

二、无砟轨道分类 (2)

三、无砟轨道功能要求 (3)

四、板式无砟轨道国内外现况 (4)

第三节 CRTSⅠ型板式无砟轨道结构组成及特点 (5)

一、CRTSⅠ型板式无砟轨道结构 (5)

二、CRTSⅠ型板式轨道结构特点 (6)

三、CRTSⅠ型板式无砟轨道的技术特点 (6)

第二章有限元法简介以及ANSYS软件 (7)

第一节有限元法简介 (7)

一、有限元法概述 (7)

二、有限元法分析过程 (7)

第二节 ANSYS (10)

一、ANSYS发展历程 (10)

二、ANSYS有限元法常用术语 (10)

三、ANSYS软件的功能 (11)

第三章 CRTSⅠ型板式无砟轨道设计 (14)

第一节无砟轨道设计方法概述 (14)

一、引言 (14)

二、国内外无砟轨道设计方法 (14)

第二节 CRTSⅠ型板式无砟轨道设计 (15)

一、基本假设 (15)

二、CRTSⅠ型板式无砟轨道设计参数合理取值的分析 (15)

三、CRTS I型无砟轨道设计参数 (16)