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研究生： Jessica Gitomarsono
Jessica Gitomarsono
論文名稱： Cyclic Behavior of RC Flexural Member with Different Design Parameter
Cyclic Behavior of RC Flexural Member with Different Design Parameter
指導教授： 鄭敏元
Min-Yuan Cheng
口試委員: 黃世建
Shyh-Jiann Hwang
歐昱辰
Yu-Chen Ou
邱建國
Chien-Kuo Chiu
Marnie Giduquio
Marnie Giduquio
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： 2021
畢業學年度： 109
語文別： 英文
論文頁數： 463
中文關鍵詞： strength 、deformation 、aspect ratio 、shear stress demand 、transverse reinforcement spacing 、diameter of longitudinal reinforcement 、reinforcement ratio
外文關鍵詞： strength, deformation, aspect ratio, shear stress demand, transverse reinforcement spacing, diameter of longitudinal reinforcement, reinforcement ratio
相關次數： 點閱：197  下載：17 
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    • An experimental study was conducted to evaluate the behavior of reinforced concrete flexural members. Test parameters investigated in this study include: (1) specimen aspect ratio (a/d), (2) shear demand, (3) transverse reinforcement spacing, (4) rebar diameter, and (5) tension to compression reinforcement ratio. A total of 25 cantilever beam specimens were tested under displacement reversals. All test specimens were designed in compliance with ACI 318-19 (ACI Committee 318, 2019). Test results indicate specimen strength were primarily limited by mechanism associated with flexure and/or strain penetration. The loss of strength, on the other hand, was primarily associated by shear and/or sliding mechanism. Thus, specimen peak strength was found to be reasonably estimated by the nominal flexural strength while specimen ultimate drift, du, was greatly influenced by the shear stress demand. Design parameters that influence the specimen overstrength, Vpeak/VMn, were discussed. A simple drift capacity model was proposed. Effective stiffness of each deformation component was estimated. Based on test results, relevant design recommendations were given.

    An experimental study was conducted to evaluate the behavior of reinforced concrete flexural members. Test parameters investigated in this study include: (1) specimen aspect ratio (a/d), (2) shear demand, (3) transverse reinforcement spacing, (4) rebar diameter, and (5) tension to compression reinforcement ratio. A total of 25 cantilever beam specimens were tested under displacement reversals. All test specimens were designed in compliance with ACI 318-19 (ACI Committee 318, 2019). Test results indicate specimen strength were primarily limited by mechanism associated with flexure and/or strain penetration. The loss of strength, on the other hand, was primarily associated by shear and/or sliding mechanism. Thus, specimen peak strength was found to be reasonably estimated by the nominal flexural strength while specimen ultimate drift, du, was greatly influenced by the shear stress demand. Design parameters that influence the specimen overstrength, Vpeak/VMn, were discussed. A simple drift capacity model was proposed. Effective stiffness of each deformation component was estimated. Based on test results, relevant design recommendations were given.

    TABLE OF CONTENTS ABSTRACT i ACKNOWLEDGEMENT ii TABLE OF CONTENTS iii LIST OF TABLES vi LIST OF FIGURES vii NOTATION xiv CHAPTER 1 INTRODUCTION 1 1.1 BACKGROUND 1 1.2 RESEARCH MOTIVATION 2 1.3 RESEARCH OBJECTIVE 2 1.4 OUTLINE 3 CHAPTER 2 LITERATURE REVIEW 5 2.1 SHEAR MODEL AND TRANSFER MECHANISM 5 2.2 SHEAR DECAY MODEL 8 2.2.1 Wight and Sozen (Wight and Sozen, 1975) 8 2.2.2 Priestley, Verma, and Xiao (Priestley et al, 1994) 8 2.2.3 Sezen and Moehle (Sezen and Moehle, 2004) 9 2.2.4 Elwood and Moehle (Elwood and Moehle, 2005) 11 2.2.5 Mehrdad Sasani (Sasani, 2007) 12 2.2.6 Choi and Park (Choi and Park, 2010) 14 2.2.7 Ghannoum and Moehle (Ghannoum and Moehle, 2012) 14 2.3 EFFECTIVE STIFFNESS FOR REINFORCED CONCRETE FLEXURAL MEMBER 16 2.3.1 ASCE 41-17 (2017) 16 2.3.2 Elwood an Eberhard (2009) 17 2.3.3 ACI 381-19 (ACI Committee 318, 2019) 18 2.4 DESIGN PROVISION OF REINFORCED CONCRETE BEAM PER ACI 318-19 18 2.4.1 Material Properties 18 2.4.2 Beam Reinforcement 19 2.4.3 Shear Strength 19 CHAPTER 3 EXPERIMENTAL PROGRAM 21 3.1 SPECIMEN DESIGN 21 3.2 SPECIMEN CONSTRUCTION 38 3.3 EXPERIMENTAL SETUP AND TEST INSTRUMENTATION 41 3.3.1 Experimental Setup 41 3.3.2 Data Recording and Instrumentation 45 CHAPTER 4 EXPERIMENTAL RESULTS 65 4.1 MATERIAL PROPERTIES 65 4.1.1 Concrete 65 4.1.2 Steel Reinforcement 73 4.2 GENERAL SPECIMEN BEHAVIOR 77 4.2.1 Specimen L6_2.0 79 4.2.2 Specimen L5_2.0 84 4.2.3 Specimen L4_2.0 89 4.2.4 Specimen L6_3.5 94 4.2.5 Specimen L5_3.5 100 4.2.6 Specimen L4_3.5 105 4.2.7 Specimen L6_3.5D 111 4.2.8 Specimen L6_5.0D 116 4.2.9 Specimen L5_5.0D 125 4.2.10 Specimen M6_2.0 134 4.2.11 Specimen M5_2.0 139 4.2.12 Specimen M4_2.0 144 4.2.13 Specimen M6_3.5 149 4.2.14 Specimen M5_3.5 155 4.2.15 Specimen M4_3.5 161 4.2.16 Specimen M6_3.5D 167 4.2.17 Specimen H6_2.0 173 4.2.18 Specimen H5_2.0 178 4.2.19 Specimen H4_2.0 183 4.2.20 Specimen H6_2.0X 188 4.2.21 Specimen H5_2.0X 193 4.2.22 Specimen H4_2.0X 198 4.2.23 Specimen M6_3.5X 203 4.2.24 Specimen M5_3.5X 209 4.2.25 Specimen M4_3.5X 214 CHAPTER 5 ANALYSIS RESULTS 221 5.1 DEFORMATION COMPONENTS 221 5.1.1 Definition 221 5.1.2 Deformation Component Result 225 5.2 MECHANISM FOR PEAK LATERAL LOAD AND ULTIMATE DRIFT 233 5.3 STRENGTH EVALUATION 242 5.4 DEFORMATION CAPACITY 249 5.4.1 Effect of Design Parameters on Ultimate Drift 249 5.4.2 Drift Model Evaluation 253 5.4.3 Proposed Drift Capacity Model 257 5.5 STIFFNESS 261 5.5.1 Flexural Stiffness 261 5.5.2 Shear Stiffness 269 5.5.3 Strain Penetration 272 5.5.4 Sliding 275 CHAPTER 6 CONCLUSION 279 REFERENCES 281 APPENDIX A 287 APPENDIX B 337 APPENDIX C 371 APPENDIX D 413

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