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研究生： Harun Alrasyid
Harun - Alrasyid
論文名稱： Seismic Shear Behavior of High Strength Reinforced Concrete Columns
Seismic Shear Behavior of High Strength Reinforced Concrete Columns
指導教授： 歐昱辰
Yu-Chen Ou
口試委員: 李宏仁
Hung-Jen Lee
王勇智
Yung-Chih Wan
周中哲
Chung-Che Chou
廖文正
Wen-Cheng Liao
學位類別： 博士
Doctor
系所名稱： 工程學院 - 營建工程系
Department of Civil and Construction Engineering
論文出版年： 2015
畢業學年度： 103
語文別： 英文
論文頁數： 259
中文關鍵詞： Reinforced concrete columns 、High-strength Concrete 、High-strength steel reinforcement 、Shear Strength 、Shear reinforcement
外文關鍵詞： Reinforced concrete columns, High-strength Concrete, High-strength steel reinforcement, Shear Strength, Shear reinforcement
相關次數： 點閱：266  下載：11 
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    • Advancement in material technology has led to the development of high-strength materials. Using high-strength concrete and steel in reinforced concrete column could give significant benefit by reducing dimension and steel congestion. However, when high-strength materials used in column for shear design, ACI 318 is not allowed to use their full strength. The current shear design provisions of ACI 318-14 limit the concrete compressive strength to 70 MPa and yield strength of shear reinforcement to 420 MPa. The major objective of this research was to identify the level of effectiveness of the use of high-strength materials in reinforced concrete column in resisting shear. The ability of current shear design provision to predict shear behavior of high-strength columns also was evaluated.
    Nine half-scale double curvature high-strength reinforced columns were constructed and tested under the combination of cyclic and constant axial compression load. The specified concrete compressive strength was 70 MPa. High strength longitudinal (SD685) and transverse (SD785) having specified yield strength 685 MPa and 785 MP were used. The key parameters considered in the experimental program were variant of axial compression and amount of shear reinforcement. All columns showed shear failure before longitudinal yielding. Not all columns reached yielding stress of shear reinforcement at ultimate condition. Based on strain measurement in shear reinforcement at ultimate condition, the yield stress limit in ACI shear design provision can be increased up to 600 MPa. The measured concrete shear strength and displacement distribution from flexure, shear and slip were reported.
    A set of database of 86 high-strength columns are built to evaluate the ACI shear design requirement for high strength reinforced concrete columns. Alternate of shear strength model and minimum amount of shear reinforcement of equations are proposed and evaluated with the test database. In the evaluation, the actual concrete compressive strength and the propose yield stress limit of shear reinforcement are used. Based on these assessments a set of shear design provision is proposed with intended to modify ACI shear design requirements for high-strength reinforced concrete columns

    Advancement in material technology has led to the development of high-strength materials. Using high-strength concrete and steel in reinforced concrete column could give significant benefit by reducing dimension and steel congestion. However, when high-strength materials used in column for shear design, ACI 318 is not allowed to use their full strength. The current shear design provisions of ACI 318-14 limit the concrete compressive strength to 70 MPa and yield strength of shear reinforcement to 420 MPa. The major objective of this research was to identify the level of effectiveness of the use of high-strength materials in reinforced concrete column in resisting shear. The ability of current shear design provision to predict shear behavior of high-strength columns also was evaluated.
    Nine half-scale double curvature high-strength reinforced columns were constructed and tested under the combination of cyclic and constant axial compression load. The specified concrete compressive strength was 70 MPa. High strength longitudinal (SD685) and transverse (SD785) having specified yield strength 685 MPa and 785 MP were used. The key parameters considered in the experimental program were variant of axial compression and amount of shear reinforcement. All columns showed shear failure before longitudinal yielding. Not all columns reached yielding stress of shear reinforcement at ultimate condition. Based on strain measurement in shear reinforcement at ultimate condition, the yield stress limit in ACI shear design provision can be increased up to 600 MPa. The measured concrete shear strength and displacement distribution from flexure, shear and slip were reported.
    A set of database of 86 high-strength columns are built to evaluate the ACI shear design requirement for high strength reinforced concrete columns. Alternate of shear strength model and minimum amount of shear reinforcement of equations are proposed and evaluated with the test database. In the evaluation, the actual concrete compressive strength and the propose yield stress limit of shear reinforcement are used. Based on these assessments a set of shear design provision is proposed with intended to modify ACI shear design requirements for high-strength reinforced concrete columns

    ABSTRACT i ACKNOWLEDGMENT ii TABLE OF CONTENTS iii LIST OF TABLES vii LIST OF FIGURES ix CHAPTER 1 INTRODUCTION 1 1.1. Historical Background 1 1.2. Problem Definition 4 1.3. Research Objective 4 1.4. Thesis Organization 5 CHAPTER 2 PREVIOUS RESEARCH AND LITERATURE REVIEW 8 2.1. Introduction 8 2.2. High-Strength Material 8 2.2.1. High-strength concrete 8 2.2.2. High-strength steel reinforcement 10 2.3. Previous Research 14 2.3.1. Experimental Study of Shear Critical High-Strength Columns 14 2.4. Minimum Shear Reinforcement Model Of High Strength Concrete Members. 29 2.5. Shear Strength Model 33 2.5.1. ACI 318-14 34 2.5.2. ASCE-ACI 426 Proposal (1973, 1977) 35 2.5.3. SEAOC (1973) 36 2.5.4. Caltrans (1995) 36 2.5.5. ASCE/SEI 41-06 (2006) 37 2.5.6. Architectural Institue of Japan (AIJ) 1990 38 2.5.7. Ascheim and Moehle 39 2.5.8. UCSD Shear Model 39 2.5.9. Xiao and Martirossyan 42 2.6. Shear Strength Provided by High-Strength Shear Reinforcement 42 CHAPTER 3 EXPERIMENTAL PROGRAM 47 3.1. Specimen Design 47 3.2. Materials 50 3.2.1. Concrete 50 3.2.2. Longitudinal Reinforcement 51 3.2.3. Transverse reinforcement 52 3.3. Construction Specimens 53 3.4. Test Setup 55 3.4.1. Instrumental and Measurement Device 55 3.4.2. Test Setup and Loading Prescription 59 CHAPTER 4 TEST RESULT AND OBSERVATION 63 4.1. Force Displacement and Damage Condition 63 4.1.1. 0.1 axial load ratio column 63 4.1.2. 0.2 axial load ratio column 67 4.1.3. 0.3 axial load ratio column 72 4.1.4. 0.4 axial load ratio column 76 4.2. Comparison Test Result 79 4.3. Crack Pattern 82 4.4. Strain Gauge Reading 84 4.4.1. Strain of Longitudinal Reinforcement 84 4.4.2. Strain of Shear Reinforcement 86 4.5. Shear Strength Contribution 90 4.6. Displacement Contribution 93 4.6.1. Flexure and Slip Displacement 94 4.6.2. Shear Displacement 97 4.6.3. Displacement Distribution 99 4.7. Assessment of Shear Design of ACI 318 (2014) 102 4.7.1. Evaluation of strain reading at shear reinforcement 104 4.7.2. Evaluation of ACI 318 Shear strength 105 4.7.3. Evaluation of ACI 318 Minimum Amount of Shear Reinforcement 107 CHAPTER 5 SHEAR STRENGTH OF HIGH-STRENGTH REINFORCED CONCRETE COLUMN 110 5.1. High-Strength Column Test Database 111 5.2. Proposed Shear Strength Model 112 5.2.1. Shear Strength of Concrete 112 5.2.2. Shear Strength of Steel 118 5.3. Shear Strength Evaluation 119 5.3.1. Effect of Axial Load Ratio 121 5.3.2. Effect of Concrete Compressive Strength 123 5.3.3. Effect of Aspect Ratio 125 5.3.4. Effect of Longitudinal Reinforcement 127 5.3.5. Effect of Shear Reinforcement 131 5.3.6. Summary Shear Strength Evaluation 135 5.4. Minimum Shear Reinforcement 136 5.4.5. Proposed Minimum Amount of Shear Reinforcement 137 5.4.6. Evaluation on Minimum Shear Reinforcement 140 5.5. Maximum Shear Reinforcement 142 CHAPTER 6 RECOMENDATION FOR SHEAR DESIGN PROVISION OF HIGH-STRENGTH REINFORCED CONCRETE COLUMNS 144 6.1. Shear Strength of Concrete 144 6.2. Shear Strength of Steel 146 6.3. Summary of Proposed Shear Provision for High Strength Reinforced Concrete Column 147 CHAPTER 7 SUMMARY, CONCLUSIONS AND FUTURE WORK 150 8.1. Summary 150 8.2. Conclusion 151 8.2.1. Experimental Result 151 8.2.2. The analytical study 153 8.3. Future Work 155 REFERENCES 156 APPENDIX A HIGH-STRENGTH COLUMN TEST DATA 163 APPENDIX B CRACK PATTERN 182 APPENDIX C STRAIN READING 203 APPENDIX D SPECIMEN DETAIL DRAWING 229

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