大跨度悬索桥施工控制有限元程序设计

发布时间：2018-01-16 08:19

本文关键词：大跨度悬索桥施工控制有限元程序设计　出处：《长沙理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：大跨度悬索桥的施工需要详细的计算数据提供理论支持,这就需要一套能够计算悬索桥施工过程中的各项必要参数的软件代替人工进行数据计算。本文针对大跨度悬索桥属于典型的柔性结构体系,以及在受力表现出来的几何非线性的特性,在学习了一些比较先进的悬索桥计算理论以及计算程序的编制原理的基础上,设计了使用有非线性限元方法计算分析大跨度悬索桥的程序。本程序中将悬索桥离散成梁单元、杆单元、索单元,通过非线性有限元法进行计算,从而为桥梁施工提供监控数据支持。本文主要工作内容如下：(1)本文介绍了有关悬索桥的发展情况、分类方式、适用范围以及计算理论的发展过程；介绍了有限元分析的基本思路以及其在计算方面的优势；介绍了悬索桥表现出几何非线性的原因及其影响因素；进行了三种形式的单元刚度矩阵的推导,以及悬索桥刚度方程计算理论的发展过程和各种计算方式的优劣势对比,还有收敛标准的确立方式等。(2)简述悬索桥的施工过程；基于有限元的分析方式,探讨了如何对悬索桥主要结构进行模拟及计算；对悬索桥在恒载作用下的几何线性及内力如何求解进行了阐述；对悬索桥加劲梁吊装过程进行了非线性分析；对悬索桥结构的形成过程进行了模拟分析。(3)根据有限元分析理论,介绍了使用fortran语言进行悬索桥施工控制计算程序的设计形式和设计过程；阐述了本大跨度悬索桥施工控制有限元程序的具体设计思路和设计过程；编制出悬索桥加劲梁架设过程计算程序的诸多子程序模块并进行了调试和验证；最后使用已有计算软件midas对悬索桥工程实例进行计算分析,将计算结果和参考文献中的已有数据进行对比,从侧面对本程序的计算结果的形式进行佐证。通过本文的工作得出了一些进行桥梁有限元计算程序的编制思路和方法,从而为施工控制中各种线性、内力等参数的计算带来便利。
[Abstract]:The construction of long-span suspension bridge needs detailed calculation data to provide theoretical support. This requires a set of software to calculate the necessary parameters of the suspension bridge in the construction process instead of manual data calculation. The long-span suspension bridge is a typical flexible structure system. And on the basis of studying some advanced theories of suspension bridge calculation and the programming principle of calculation program, the geometrical nonlinear characteristics of the force are shown. A program for calculating and analyzing long-span suspension bridge with nonlinear finite element method is designed. In this program, the suspension bridge is discretized into beam element, bar element and cable element, and calculated by nonlinear finite element method. The main contents of this paper are as follows: 1) this paper introduces the development of suspension bridges, classification methods, applicable range and the development process of calculation theory. The basic idea of finite element analysis and its advantages in calculation are introduced. The causes and influencing factors of geometric nonlinearity of suspension bridges are introduced. Three forms of element stiffness matrix are derived, and the development process of stiffness equation calculation theory of suspension bridge and the advantages and disadvantages of various calculation methods are compared. The construction process of suspension bridge is briefly described. Based on the finite element analysis method, how to simulate and calculate the main structure of suspension bridge is discussed. How to solve the geometric linearity and internal force of suspension bridge under dead load is expounded. Nonlinear analysis of hoisting process of stiffened beam of suspension bridge is carried out. Based on the theory of finite element analysis, this paper introduces the design form and design process of the calculation program of suspension bridge construction control using fortran language. The concrete design idea and design process of the finite element program for the construction control of the long-span suspension bridge are expounded. Many subroutine modules of the calculation program for the erection process of the stiffened beam of suspension bridge are worked out and debugged and verified. Finally, the existing calculation software midas is used to calculate and analyze the suspension bridge engineering case, and the calculation results are compared with the existing data in the references. The form of calculation results of this program is verified from the side. Through the work of this paper, some programming ideas and methods for the bridge finite element calculation program are obtained, thus various kinds of linearity in construction control are obtained. The calculation of internal force and other parameters brings convenience.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.25

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