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研究生： 維薩亞
Sayed Ahsaan Razvi
論文名稱： 中空鋼筋混凝土圓形柱在反覆載重下之結構行為模擬
Cyclic Behavior Modelling of Hollow Circular Reinforced Concrete Columns
指導教授： 洪崇展
Hung, Chung-Chan
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： 2021
畢業學年度： 109
語文別： 英文
論文頁數： 110
中文關鍵詞： 空心圓形鋼筋混凝土 、剪切強度 、塑性鉸 、空心柱
外文關鍵詞： Hollow circular Reinforced concrete, shear strength, plastic hinge, OpenSees, hollow column, pipe
相關次數： 點閱：181  下載：12 
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    • Hollow circular columns withstand higher flexural strength to mass, moment as compared to solid section columns due to their reduced mass. The behavior of hollow columns is mainly dependent upon the position of neutral axis. However, hollow columns are more shear critical due to their hollowness. No research has been done on predicting the impact of plastic hinge lengths calculated from already available plastic hinge equations of solid columns. The purpose of this research was to analyze the shear strength capacity from the previous models and equations. The study emphasized the formulation of a numerical model which predicted the cyclic behavior of hollow columns with limited computational effort. The impact of plastic hinge length equations for hollow columns on predicting their cyclic behavior was also investigated, and the optimal plastic hinge length equation was identified through OpenSees software. The proposed model was found to be sufficiently reasonable by comparing the cyclic response with the experimental result. The numerical model also showed that plastic hinge length calculated from Panagiotakos & Fardis equation predicted the cyclic behavior in a reasonable manner. Plastic hinge length of 15% of the shear span was more satisfactory for cyclic behavior prediction. However, UHPC columns need to be tested and extending of the proposed model for the UHPC columns.

    DEDICATION ii ABSTRACT iii ACKNOWLEDGEMENT iv TABLE OF CONTENTS v LIST OF TABLES viii LIST OF FIGURES ix LIST OF SYMBOLS xiii CHAPTER 1: INTRODUCTION 1 1.1 Research Objectives 2 CHAPTER 2: LITERATURE REVIEW 3 2.1 Normal concrete 3 2.1.1 Reinforcement in column 4 2.2 Confinement effect in column 4 2.2.1 Hollow section with a single layer of reinforcement 8 2.2.2 Hollow section with two layers of reinforcement 10 2.3 Column axial load capacity 11 2.4 Shear strength models 11 2.4.1 Kowalsky and Priestley (2000) 13 2.4.2 Ranzo and Priestley (2001) 15 2.4.3 Turmo et al. (2009). 17 2.4.4 ACI 318-19 19 2.5 Plastic hinge lengths 20 2.5.1 Priestley and Park (1987) 20 2.5.2 Paulay and Priestley (1992) 23 2.5.3 Berry et al. (2008) 24 2.5.4 Panagiotakos & Fardis (2001) 25 2.5.5 Bae & Bayrak (2008) 25 2.6 Failure modes of column 27 2.7 Cross-sectional geometry parameters 28 2.8 Flexural Capacity 30 2.9 Database of hollow columns 32 2.10 Deformations in column 34 2.10.1 Flexural deformation 34 2.10.2 Reinforcement slip deformation 35 2.10.3 Shear deformation 36 CHAPTER 3: MODELLING TECHNIQUE 37 3.1 Fiber section 37 3.2 Material Modeling 38 3.2.1 Normal concrete constitutive model 38 3.2.2 Steel constitutive model. 39 3.3 Force-based and displacement-based element. 40 3.4 Strain penetration effect 41 3.5 Proposed Model 43 3.5.1 Strain penetration effect by using element 45 3.5.2 Shear spring consideration 49 CHAPTER 4: RESULTS AND DISCUSSION 54 4.1 Shear strength evaluation 54 4.2 Consideration of force-based beam-column element. 58 4.2.1 HS1 column 59 4.2.2 HS2 column 64 4.2.3 HS3 column 68 4.2.4 S3 column 73 4.2.5 S4 column 77 4.3 Consideration of plastic hinge length. 81 4.3.1 HS1 column 81 4.3.2 HS2 column 85 4.3.3 HS3 column 89 4.3.4 S3 column 93 4.3.5 S4 column 96 4.4 Strain penetration effect by using element 102 4.5 Shear spring consideration 103 CHAPTER 5: CONCLUSION 106 CHAPTER 6: FUTURE WORK 108 REFERENCES 109

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