优秀研究生学位论文题录展示

膜结构设计中的理论问题及其工程实践

专 业: 桥梁与隧道工程  英文
关键词: 薄膜结构 几何非线性 初始形态 静力分析 风振响应 裁剪分析
分类号: U41  U44  U45
形 态: 共 137 页 约 89,735 个字 约 4.292 M内容
阅 读: 全文阅读说明

内容摘要


膜结构是近三十多年来发展起来的一种空间结构形式。

由于它具有自重轻,建筑造型美观,适合修建大跨结构等优点,因而受到广大建筑师的青睐。

国内外已有很多成功的工程出现,但膜结构在中国的研究现状和世界先进水平相比还存在一定的差距,该文旨在通过对该课题的研究,对薄膜结构在中国的推广应用做一些工作。

该文在理论上建立了膜结构找形分析的有限元方程,提出了基于几何非线性位移法的找形分析方法。

通过采用小杨氏模量技术,有效的将找形的数学过程转化为一力学过程,并成功的通过力学过程实现了膜结构的找形。

提出了在第一次找形后输入真实的弹性模量进行第二次找形的概念。

指出第二次找形结束后得到的膜曲面才是在实际施工中能够真正实现的形状。

通过几个工程实例证明了此方法的有效性和广泛适用性。

找形的实现为准确的进行下一步的静、动力性能分析和裁剪分析成为可能。

该文编制了较为完整的薄膜结构的设计软件及相关的计算分析程序……

全文目录


文摘
英文文摘
1. Introduction
1.1 Introduction of Membrane Structure
1.1.1 Definition of Membrane Structure
1.1.2 Types of Membrane Structure
1.1.3 Advantages of Membrane Structure and Existing Problems
1.1.4 Research and Development of Membrane Structure at Home and Aboard
1.1.5 Characteristics and Key Problems of Membrane Structure
1.1.6 The Existing Problems in Research、 Design and Construction of Membrane Structures in China
1.2 Main Work of This Thesis
2. Geometrically Nonlinear Finite Element Analysis of Structural Membrane
2.1 Incremental Equilibrium Equation for Geometrically Nonlinear Problems
2.1.1 The Deformation and Movement of an Object
2.1.2 Geometrically Nonlinear Equation and Constitutive Equation under Large Deflection Condition
2.1.3 The Establishment of Incremental Equilibrium Equation for Geometrically Nonlinear Problems
2.2 Nonlinear Finite Element Formula for Structural Membrane
2.2.1 Basic Assumption
2.2.2 The Establishment of Finite Element Equation for Structural Membrane
2.2.3 The Equivalent Nodal Force
2.3 Solution of Nonlinear Equation Group
2.3.1 Newton-Raphson Iteration Method and Updated Newton-Raphson Iteration Method
2.3.2 Load Increment Method
2.3.3 Iterative Convergent Criteria
3. The Shape Finding Analysis of Structural Membrane
3.1 The Introduction of Commonly Used Shape Finding Methods at Home and Abroad
3.1.1 Minimal Surface Method
3.1.2 Physical Model Method
3.1.3 Force Density Method
3.1.4 Dynamic Relaxation Method
3.2 The Shape Finding Method Based on Nonlinear Finite Element
3.2.1 Basic Theory
3.2.2 Solution Method
3.2.3 Problems Need Attention
3.3 The Real Shape Finding Projects Based on Nonlinear Finite Element
3.3.1 Validity Verification of the Shape Finding Method
3.3.2 Practicality Verification of the Shape Finding Method
3.3.3 Some Useful Conclusions
4. The Static Analysis of Structural Membrane
4.1 The Whole Process Static Analysis of Membrane Structure
4.1.1 Loads Calculation
4.1.2 Basic Principle
4.1.3 Influence of Structural and Mechanical Parameters to Structure Property.
4.2 Static Analysis for Some Practical Projects Based on Geometrically Nonlinear
5. The Cutting Pattern Analysis of Structural Membrane
5.1 The General Introduction of Current Cutting Methods
5.1.1 Triangular Development Method
5.1.2 Geodesic Median Method
5.1.3 Extremum Method
5.1.4 Increment Finite Elements Method of Bar Element Plane Element
5.2 The Practical Cutting Method Based on the Element Division of Shape Finding
5.2.1 Introduction of This Method
5.2.2 The Post-Process of Cutting Drawings
5.3 Application of the Practical Cutting Method in Real Projects
5.4 Brief Summary of This Section
6. Wind Induced Dynamic Response of Structural Membrane
6.1 Introduction
6.2 The Solution of Geometrically Nonlinear Dynamic Response Problem
6.2.1 General Introduction of the Theory
6.2.2 Newmark- β Method and Wilson- θ Method
6.3 Computer Simulation of Wind Histories with Spatial Correlativity
6.3.1 Mean Wind and Fluctuating Wind
6.3.2 Power Spectrum of Fluctuating Wind
6.3.3 Power Spectrum Density Function of Fluctuating Wind
6.3.4 The Simulation of Wind Load
6.4 The Wind Induced Response Analysis for Some Practical Membrane Structure
6.4.1 Characteristics of Free Vibration of Membrane Structure
6.4.2 Wind Induced Vibration Analysis for Some Practical Projects
6.5 The Existing Problems of Wind-Induced Vibration of Membrane Structure
7. The Problems Demanding Attention in Design and Construction of Structural Membrane
7.1 The Integration of Membrane Structure Design and Construction
7.2 The Problems Demanding Attention in Practical Membrane Engineering
7.2.1 Architectural Shape Design
7.2.2 Structure Design
7.2.3 The Construction of Membrane Structure
8. Conclusions and Vista
8.1 Main Contents of This Thesis
8.2 Conclusions of This Thesis
8.3 Vista of This Thesis
Reference
Main Achievements
Acknowledgements

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中图分类: > U41 > 交通运输 > 公路运输 > 道路工程
其他分类: > U44 > 交通运输 > 公路运输 > 桥涵工程
其他分类: > U45 > 交通运输 > 公路运输 > 隧道工程

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