Seismic Performance of Braced Frames with Buckling Restrained Slit Pipe Dampers

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姓名

英德拉(Indra Rio Saputro) 查詢紙本館藏

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土木工程學系

論文名稱

Seismic Performance of Braced Frames with Buckling Restrained Slit Pipe Dampers
(Seismic Performance of Braced Frames with Buckling Restrained Slit Pipe Dampers)

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摘要(中)

本研究中提出一種新型阻尼器，並將其命名為「切縫鋼管挫屈束制阻尼器」。此阻尼器同時結合了鋼管與挫屈束制斜撐的特性，在結構物受側向力時，有效展現良好的消能能力。在此消能器中，以最外層鋼管提供束制作用，並利用填充之混凝土控制內層切縫鋼管之後挫屈行為。內層鋼管的切縫設計，可提供不同的結構消能能力，此切縫鋼管的塑性行為可對整體結構提供穩定的消能表現。
研究中針對一系列切縫鋼管挫屈束制阻尼器及配置此阻尼器之半剛接構架進行反覆載重試驗。試驗結果發現，若在阻尼器內層鋼管內做適當的切縫，斜撐構架可在位移比2.5%內展現良好的強度表現和消能能力。由試驗結果比較中得知，加裝切縫鋼管挫屈束制阻尼器的斜撐構架，能有效地提升整體構架在強度、勁度、變形及能量消散上的能力，因此，此阻尼器應為有效之結構耐震性能提升設計。

摘要(英)

A new energy dissipation device that combined the BRB and pipe damper systems to form the buckling restrained slit pipe dampers (BRSPD) is proposed. This device incorporates a slit pipe damper that is limited by the inner tube. The outer tube was used as a restraining mechanism. Slit in the pipe is used to control energy dissipation and deformation capacity. This damper is designed to provide adequate hysteretic performance through core yielding under both tension and compression.
A series of cyclic loading tests were conducted on the BRSPD and semi-rigid frames with the proposed devices. It was found that the BRSPD sustained significant strength and energy dissipation capability before reaching 2.5% drift ratio, if adequate number of slits in the core pipe was used. Comparisons of the test results showed that the frame strength was increased when the buckling restrained slit pipe dampers were adopted. Significant gains in strength, stiffness, deformation capacity and energy dissipation for framed structures with BRSPD justified the effectiveness of the proposed design.

關鍵字(中)

★ 切縫鋼管挫屈束制阻尼器
★ 耐震行為
★ 消散能量
★ 斜撐構架

關鍵字(英)

★ Buckling restrained slit pipe dampers
★ Seismic performance
★ Energy dissipation
★ Braced frames

論文目次

ABSTRACT i
摘要 ii
ACKNOWLEDGEMENTS iii
TABLE OF CONTENTS iv
LIST OF TABLES viii
LIST OF FIGURES ix
CHAPTER 1 1
INTRODUCTION 1
A. Introduction 1
B. Motivations 2
C. Objectives 3
D. Outlines 3
CHAPTER 2 4
LITERATURE REVIEW 4
A. Inelastic Postbuckling and Cyclic Behavior of Tubular Braces 4
B. Pipe Dampers 5
C. Concentrically Braced Frame 6
D. Steel Frames with Semi-Rigid Connection 6
E. Top and Seat Angle 7
F. Theoretical study on design methods of BRB 8
CHAPTER 3 METHODOLOGY 9
A. Theory 9
1. Strong Column Weak Beam Philosophy 9
2. Bolted Top and Seat Angle Connection 11
3. Double web angle with slot connection 11
4. Buckling restrained slit pipe dampers 11
5. Braced frame with buckling restrained slit pipe dampers 11
6. Bending Capacity of Beam 12
7. Hinge Gussets and High Strength Bolt 13
8. Strength of buckling restrained slit pipe dampers 13
B. Finite Element Analysis 15
1. Analytical model for buckling restrained slit pipe damper simulation ……………………………………………………………………………15
2. Analytical model for frames with buckling restrained slit pipe dampers ……………………………………………………………………………16
3. Chaboche kinematic hardening for cyclic analysis 18
4. Concrete for restrainer analysis 18
C. Mechanism of damper 19
CHAPTER 4 EXPERIMENTAL PROGRAM 20
A. General 20
B. Specimen Design 20
1. Set-Up for Component Tests 22
2. Set-up for Braced Frame Tests 22
C. Details Of Specimens 22
1. Brace member 22
2. Component Test 23
3. Semi Rigid Moment Frame 23
4. Braced Frame 24
D. Materials 24
1. Steel structures 24
2. Concrete 25
E. Specimen Construction 25
F. Instrumentation 25
1. Strain Gauges 25
2. Transducers 26
3. Data Acquisition System 26
G. Lateral Support 26
F. Loading Protocol 26
CHAP TER V RESULT AND OBSERVATION 27
A. General 27
B. Experimental Observations 27
C. Component Tests 27
1. Specimen SL 8-4 27
2. Specimen SL 8-2 28
3. Specimen SL 6-4 29
4. Specimen SL 6-2 30
5. Specimen SL 4-4 31
6. Specimen SL 4-2 32
D. Frame Tests 33
1. Specimen MRF 12 33
2. Specimen BRF 6-4 34
3. Specimen BRF 6-2 34
4. Specimen BRF 4-4 35
5. Specimen BRF 4-2 36
CHAP TER VI 37
COMPARISONS AND DISCUSSIONS 37
A. General 37
B. Comparisons of Strength between Experimental and Analytical Results 37
1. Finite Element Simulation 37
2. Stiffness 37
3. Strength 38
4. Deformation Capacity 39
5. Energy Dissipation 40
6. Performance Evaluation 40
7. Design Recommendations 41
CHAP TER VII 42
CONCLUSIONS 43
A. General 43
B. Suggestions 44
REFERENCES 45
TABLES 48
FIGURES 57

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指導教授

許協隆

審核日期

2018-8-13

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