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研究生： 郭約翰
Suryanto, Yohanes
論文名稱： 含阻尼外伸臂桁架中層結構之耐震設計和評估
Seismic Design and Assessment for Mid-rise Building Equipped with Damped-outrigger System
指導教授： 劉光晏
Liu, Kuang-Yen
共同指導教授: 林保均
Lin, Pao-Chun
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2022
畢業學年度： 110
語文別： 英文
論文頁數： 162
外文關鍵詞： damped-outrigger system, buckling-restrained brace, viscous damper, energy dissipation, seismic assessment
相關次數： 點閱：343  下載：59 
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    • The outrigger system has been widely used worldwide to improve structural seismic performance. The outrigger system reduces inter-story drift by increasing particular story stiffness and reducing the core structure's overturning moments. A damped-outrigger system has been proposed to improve the structure's seismic performance by increasing the damping instead of increasing the structure's stiffness. Engineers need a fair comparison between a damped-outrigger and conventional systems in proposing the most suitable structural system. The motivation of this study is to help engineers get a better picture in comparing the seismic response of the structures with a damped-outrigger system and conventional structural systems such as moment-resisting and buckling-restrained brace frames. Buckling restrained-brace and viscous damper as energy dissipation devices in the single and dual-layer damped-outrigger system are discussed in this study. Forty-eight mid-rise numerical models with various building heights, outrigger/side spans, and structural systems, are analyzed using elastic response spectrum, multi-mode pushover, nonlinear response history, and incremental dynamic analyses. Seismic design is performed using ETABS, while seismic assessment is performed using PISA3D under the Taiwanese seismic design and assessment codes applied in Taiwan. The study shows that the mid-rise building equipped with a damped-outrigger system is better in reducing the structural response. Damped-outrigger systems can improve structural effectiveness and efficiency if compared to conventional systems. In addition, the determining viscous damper size method that can give a fairly similar amount of damping with the designed buckling-restrained brace proposed in this study is also proven very reliable.

    ABSTRACT I ACKNOWLEDGEMENT I TABLE OF CONTENTS III LIST OF TABLES V LIST OF FIGURES VII LIST OF SYMBOLS AND DEFINITIONS XI CHAPTER 1 INTRODUCTION 1-1 1.1. Research Background 1-1 1.2. Objectives 1-2 1.3. Scope of Project 1-3 CHAPTER 2 LITERATURE REVIEW 2-1 2.1. Damped-outrigger System 2-1 2.1.1. Optimal Elevations of the 1-layer Damped-outrigger System 2-3 2.1.2. Optimal Elevations of the 2-layer Damped-outrigger System 2-4 2.2. Platform of Inelastic Structural Analysis for 3D Systems (PISA3D) 2-5 2.2.1. Application of PISA3D for Buckling-restrained Braces 2-5 2.2.2. Additional PISA3D Studies 2-6 2.3. Fitted Fragility Construction 2-6 CHAPTER 3 NUMERICAL MODEL 3-1 3.1. General Information 3-1 3.2. Gravity Load 3-2 3.3. Elastic Response Spectrum Analysis for Design Purpose 3-2 3.4. Structural Systems and Element's Properties 3-5 3.5. Numerical Modeling using ETABS and PISA3D 3-7 3.5.1. Assumptions for Seismic Design Purpose 3-7 3.5.2. Specific Requirement for Numerical Models with Viscous Damper 3-8 CHAPTER 4 ANALYSIS METHOD 4-1 4.1. Seismic Design Method 4-1 4.1.1. Multi-mode Pushover Analysis (Semi-performance Based Design) 4-2 4.1.2. Modal Analysis for Elastic Inter-story Drift Calculation 4-3 4.2. Seismic Assessment Method 4-4 4.2.1. Performance Point and Equivalent Damping Ratio 4-4 4.2.2. Nonlinear Response History Analysis 4-6 4.2.3. Incremental Dynamic Analysis for Fragility Curve Construction 4-7 CHAPTER 5 RESULT AND DISCUSSION 5-1 5.1. Elastic Response 5-1 5.1.1. Elastic Inter-story Drift 5-2 5.1.2. Demand/Capacity Base Shear 5-4 5.2. Inelastic Response 5-5 5.2.1. Equivalent Damping Ratio 5-5 5.2.2. Nonlinear Response History Analysis 5-6 5.2.3. Fragility Curves 5-12 CHAPTER 6 CONCLUSION 6-1 6.1. Conclusions 6-1 6.2. Suggestions for Future Study 6-4 REFERENCES R1 APPENDIX 1 STRUCTURAL MEMBER SIZE OF NUMERICAL MODELS A1-1 APPENDIX 2 INCREMENTAL DYNAMIC ANALYSIS RESULTS A2-1

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