具變形放大消能器之斜撐構架耐震行為研究

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姓名

林光耀(Hendra Halim) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

具變形放大消能器之斜撐構架耐震行為研究
(Seismic Performance of A-Braced Frames with Amplified Deformation Steel Curved Dampers)

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摘要(中)

本研究針對配置變形放大曲線消能器之鋼結構耐震性能進行評估，研究中使用不同尺度之曲線阻尼器製作斜撐(A-Brace)，並將之應用於結構設計。此設計中，藉由變形放大機制，在結構承受較小樓層位移比時，即可在阻尼器上造成倍數之變形，藉以在結構早期變形時有效消能。為驗證此設計之有效性，研究中首先針對配置不同尺度A-Brace之鋼構架進行一系列週期載重試驗，實驗結果顯示，此設計在位移放大機制作用下，結構在早期變形階段有效消散能量，結構之強度及勁度亦可因此設計而獲有效提升。另為進一步確認此新型設計在結構耐震設計之應用性，研究中亦選擇12個地震紀錄，進行結構動力分析，研究結果顯示，配置此變形放大曲線消能器之鋼構架在不同地震作用下之破壞，均可獲有效減低。上述研究結果顯示，變形放大曲線消能器可有效提升結構之強度、變形能力及能量消散能力，因此應為一有效之結構耐震效能提升設計。

摘要(英)

This study focused on the performance evaluation of new A-Brace designs that adopted steel curved dampers (SCD) with amplified deformation mechanisms. The A-Brace was implemented in the strengthening scheme. The purpose of adopting A-Brace to the existing structure is to possess an allowable story drift and reduce the number of formation plastic hinges which might be occurred during major earthquake. The brace enhanced the lateral force resisting capacity and frame stiffness. The application was verified through experimental and numerical studies of the test frames. A series of cyclic load tests with various damper dimensions, subjected to cyclic increasing displacement histories, were conducted. It was confirmed experimentally that A-Brace started to dissipate energy in early deformation stage by amplifier mechanism and have large energy dissipation capacity. In the seismic evaluation, twelve earthquake ground motions were selected for time history analyses. A-Brace was modeled as kinematic link element based on multilinear force-displacement relationship obtained from finite element analysis. The results showed that significant improvement could be achieved by adding A-Brace to the existing steel moment frame. Therefore, the structural damages can be minimized. Simultaneous accomplishments in high strength, large deformation capability, and significant energy dissipation validated the applicability of the proposed A-Brace design to earthquake-resistant structural designs.

關鍵字(中)

★ 曲線消能器
★ 變形放大
★ 耐震性能
★ 能量消散
★ 斜撐設計

關鍵字(英)

★ Steel Curved Damper
★ A-Brace
★ Amplified Deformation
★ Seismic Performance
★ Energy Dissipation
★ Brace Design

論文目次

TABLE OF CONTENTS
摘要 i
ABSTRACT ii
TABLE OF CONTENTS iii
LIST OF TABLES vi
LIST OF FIGURES vii
NOMENCLATURE xii
CHAPTER 1 INTRODUCTION 1
1.1 Background 1
1.2 Motivations 4
1.3 Objectives 5
1.4 Outlines 5
CHAPTER 2 LITERATURE REVIEW 6
2.1 Special Moment Resisting Frame Response 6
2.2 Braced Frame Response 8
2.3 Passive energy dissipation 9
2.4 Seismic Improvement Remedy 12
2.5 Steel Curved Damper 14
CHAPTER 3 INVESTIGATION ON PERFORMANCE OF STEEL CURVED DAMPERS AND A-BRACES 17
3.1 Introduction 17
3.2 Methodology 18
3.2.1 Deformation Amplification 18
3.2.2 A-Brace Strength 20
3.3 Testing Procedure 21
3.3.1 Experimental Description 21
3.3.2 Material Properties 22
3.3.3 Specimen Label 24
3.3.4 Instrumentations 25
3.3.5 Experimental Set-up 27
3.3.6 Loading Protocol 28
3.4 The response of Test Specimens 29
3.4.1 Inter-related Deformation Ratio 29
3.4.2 Steel Curved Damper Component Test 30
3.4.3 A-Brace Component Test 31
3.5 Finite Element Analysis and Verification 31
CHAPTER 4 INVESTIGATION ON PERFORMANCE OF A-BRACED FRAMES 34
4.1 Introduction 34
4.2 Methodology 36
4.2.1 Strong Column Weak Beam Principles 36
4.2.2 Frame Strength 37
4.3 Testing Procedure 39
4.3.1 Experimental Description 39
4.3.2 Material Properties 39
4.3.3 Specimen Label 40
4.3.4 Instrumentations 40
4.3.5 Experimental Set-up 42
4.3.6 Loading Protocol 43
4.4 The response of Test Specimens 43
4.4.1 Inter-related Deformation Ratio 43
4.4.2 Frame response 44
4.5 Finite Element Analysis and Verification 45
CHAPTER 5 COMPARISONS AND DISCUSSIONS 47
5.1 Steel Curved Damper and A-Brace Component Tests 47
5.1.1 Strength 47
5.1.2 Stiffness 48
5.1.3 Energy Dissipation 48
5.1.4 Equivalent Viscous Damping 49
5.1.5 Performance Evaluation 50
5.2 Frame Tests 50
5.2.1 Strength 50
5.2.2 Stiffness 51
5.2.3 Energy Dissipation 51
5.2.4 Equivalent Viscous Damping 52
5.2.5 Performance Evaluation 52
5.3 Design Recommendations 53
CHAPTER 6 SEISMIC ANALYSES OF A-BRACED FRAMES 54
6.1 Structural Model 54
6.2 Ground Motions 56
6.3 Numerical Results and Discussions 57
6.4 Conclusions 58
CHAPTER 7 CONCLUSIONS 60
7.1 Conclusions 60
7.2 Suggestions 61
REFERENCES 62
TABLES 69
FIGURES 83

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指導教授

許協隆(Hsieh-Lung Hsu)

審核日期

2019-1-24

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