竖向静荷载作用下钢筋混凝土方柱——T形薄壁柱局部转换节点ANSYS非线性研究

摘要

高层建筑转换结构体系在三维复杂几何性和荷载条件包括混凝土的三维非线性问题难用一般的技术为了精确地估计破坏特点和特征.由于一些高层建筑在地震区可能首到地震力所以对T-型薄臂柱转换结点的三维非线性分析是必要.这能帮助精确的模拟在不同荷载的反应性能.而为了得到这个目标需要做到很多可靠的分析研究.本文通过有限元ANSYS软件作了高层建筑加腋梁和T-型薄臂柱转换结点在竖向荷载作用下的三维非线性分析.本文主要工作是通过存在的弹性实验数据作参考来研究T-型薄壁柱转换结点的三维非线性分析.高层建筑转换结构体系在三维复杂几何性和荷载条件包括混凝土的三维非线性问题难用一般的技术为了精确地估计破坏形态特点和特征.在有限元三维非线性和实验数据弹性分析的基础上,本文做了比较而提出了这种类型节点的的破坏形态和顺序.

目录

文摘

英文文摘

1 Introduction

1.1 Background

1.2 Current Research Status of Transfer-Story

1.2.1 Different Transfer-Story Systems

1.2.2 The effect of Transfer Story Location and Height Stipulatious

1.2.3 Transfer Story Stipulations

1.2.4 Upper-Under (U-U) Transfer Story Stiffness Change Control

1.2.5 Transfer Story Structure Arrangement in Tall Buildings

1.3 Development and Current Research Status of Transfer Story

1.3.1 Composite R-C-S Transfer Story Application

1.3.2 Pre-stressed Concrete Transfer Story Application

1.3.3 Transfer Story Beam Internal Forces Performance Upgrading

1.4 Current Research Status of Thin-Walled Column

1.5 RC Structural Finite Element Method Analysis (SFEMA)

1.5.1 A Brief History of Finite Element Method in RC structures.

1.5.2 Current Engineering Research Status of Finite Element Method Analysis

1.5.3 Fundamentals of FEM Practice

1.5.4 Rules for Finite Elements method

1.5.5 Basic Steps in the FEM

1.5.6 Summary

1.6 Finite Element Engineering Programs

1.6.1 Introduction

1.6.2 Automated Dynamic Incremental Nonlinear Analysis (ADINA)

1.6.3 The General Purpose Finite Element System (ABAQUS)

1.6.4 The Swanson Analysis Systems (ANSYS)

1.6.5 MARC Analysis Research Corporation-Europe,Netherlands

1.6.6 SAMCEF (L.T.A.S-Belgium)

1.6.7 A Nonlinear Finite Elements Program-SAP

1.6.8 The Finite Element System (CASTEM-France)

1.6.9 BERSAFE System

1.6.10 Summary

1.7 Thesis Global Contents and Objectives

2 Application of Finite Element Method within Reinforced Concrete Structures

2.1 Introduction

2.2 Structural System Modeling

2.2.1 Load Modeling

2.2.2 System Modeling

2.2.3 Resistance Modeling

2.2.4 Material Modeling

3 Concrete Elasticity and Failure Criteria

3.1 Introduction

3.2 Mechanical Behavior of Concrete

3.2.1 General Considerations

3.2.2 Uniaxial Behavior

3.2.3 Biaxial Behavior

3.2.4 Triaxial Behavior

3.3 Failure Criteria

3.3.1 Stress Invariants

3.3.2 Strain Invariants

3.3.3 Characteristic of Failure Surface

3.3.4 Failure Models Proposed for Concrete

4 Reinforced Concrete Constitutive Relations Models

4.1 Concrete Cracking and Cracking Modeling

4.1.1 Concrete Cracking

4.1.2 Crack Modeling

4.2 Reinforced Concrete Constitutive Relations Model

4.2.1 Linear Elastic Constitutive Relations Model

4.2.2 Nonlinear Elasticity (NLE) Constitutive Relations Modeling

4.3Summary

5 Application of ANSYS to NLA of RC Transfer Story Joint

5.1 The Swanson Analysis Systems (ANSYS)

5.2 Performing ANSYS Linear and Nonlinear Analysis

5.2.1 Introduction

5.2.2 Nonlinear Nonlinearities

5.3 SOLID65-3-d Reinforced Concrete Solid

5.3.1 SOLID65 Element Description

5.3.2 Assumptions and Restrictions with SOILD65

5.3.3 Modeling of a Crack

5.3.4 Modeling of Crushing

5.4 Case Study:NLA of an RC T-shaped Thin-walled Column joint analysis

5.4.1 Test Specimen description

5.4.2 Process of Sepcimen FE Modeling

5.4.3 1

5.4.3 2

5.5 Summary

6 Comparison of ANSYS nonlinear numerical analysis and experimental results

7 Conclusionsand suggestions

Acknowledgments

References

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