Refined Strut-and-Tie Analytical Model of Exterior Beam-Column Joint｜國立臺灣科技大學博碩士論文系統

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研究生：	李誌穎 PRADITA - MULYA DJAPRI
論文名稱：	Refined Strut-and-Tie Analytical Model of Exterior Beam-Column Joint Refined Strut-and-Tie Analytical Model of Exterior Beam-Column Joint
指導教授：	鄭敏元 Min-Yuan Cheng
口試委員:	黃世建 Shyh-Jiann Hwang 李宏仁 Hung-Jen Lee 歐昱辰 Yu-Chen Ou
學位類別：	碩士 Master
系所名稱：	工程學院 - 營建工程系 Department of Civil and Construction Engineering
論文出版年：	2016
畢業學年度：	104
語文別：	英文
論文頁數：	152
中文關鍵詞：	beam-columnjoint 、jointshearstrengthmodel 、exteriorconnections
外文關鍵詞：	beam-column joint, joint shear strength model, exterior connections
相關次數：	點閱：196 下載：11
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上一筆

A moment resisting frame consists of three major structural element including beams, columns, and joints where beam and column element intersects. Beam-column joint subassemblages is one of the important members that needed to be carefully designed to ensure when the system is subjected to strong lateral force, extensive damage does not occur in joint. Despite of having extensive research results in beam-column joint, different opinions can be found among different research groups. Given the fact that controversial opinions still exist and a few issues remain unsolved, there is some room to improve better understanding of joint strength and deformation capacities. A joint strength prediction model and design recommendation to ensure satisfactory deformation of the exterior beam-column subassemblages is developed. The developed model is evaluated based on collected database of 87 exterior connections. The performance of the proposed model is compared with three existing models which are Softened-Strut-and-Tie model proposed by Hwang et al. (2002), J-Failure Modified Strut-and-Tie Analytical model proposed by Hassan (2011), and J-Failure Empirical Shear Strength model which proposed by Hassan (2011). The comparison between each model shows that the proposed model presents better results to predict the joint strength and provides a better index to estimate the specimen ultimate deformation.

TABLE OF CONTENTS
ABSTRACT ................................................................................................................... i
ACKNOWLEDGEMENT ........................................................................................... ii
TABLE OF CONTENTS .......................................................................................... iii
LIST OF TABLES ....................................................................................................... v
LIST OF FIGURES .................................................................................................... vi
NOTATIONS............................................................................................................... ix
Chapter 1 INTRODUCTION .................................................................................. 1
1 Introduction .............................................................................................. 1
2 Joint Strength and Deformation Capacity ................................................ 3
3 Research Motivation ................................................................................. 7
4 Research Objective ................................................................................... 8
5 Outline of Thesis ...................................................................................... 8
Chapter 2 LITERATURE REVIEW ...................................................................... 9
1 Introduction .............................................................................................. 9
2 Database Development ............................................................................. 9
3 Joint Failure Modes ................................................................................ 20
4 Joint Strength .......................................................................................... 24
4.1 Effect of Axial Load ............................................................................... 24
4.2 Effect of Joint Transverse Reinforcement .............................................. 28
4.3 Effect of Intermediate Column Bar ........................................................ 33
4.4 Effect of Beam over Column Depth ....................................................... 35
4.5 Effect of Concrete Compressive Strength .............................................. 38
4.6 Effect of Moment Flexural Strength Ratio ............................................. 41
4.7 Joint Shear Strength Model .................................................................... 42
4.7.1 Simplified Softened Strut-and-Tie Model (SSST) ............................. 43
4.7.2 J-Failure Modified Strut-and-Tie Analytical and Empirical Model (JMST) ............................................................................................... 49
5 Joint Deformation Capacity .................................................................... 53
5.1 Effect of Joint Shear Demand ................................................................. 54
5.2 Joint Deformation Model by Bayesian Parameter Estimation Method (Kim and LaFave 2009) .......................................................................... 55
5.3 Joint Deformation Model by ASCE 41-13 (2013) Method .................... 57
Chapter 3 METHODOLOGY ............................................................................... 61
1 Database Development and Parameter Determination ........................... 61
1.1 Beam and Column Length ...................................................................... 62
1.2 Nominal Flexural Strength of the Column and Beam ............................ 62
1.3 Moment Ratio ( r M ) ............................................................................... 63
1.4 d, d’, dm and d’m ...................................................................................... 63
1.5 Column Bar and Joint Hoop Ratio Definition ........................................ 65
1.5.1 Column Bar Ratio, (ρctot, ρcip, ρcit) ....................................................... 65
1.5.2 Volumetric Joint Hoop Ratio ( vj �� ).................................................... 69
1.6 Buckling Resistance of Column Bar ( / bc bc s d ) ...................................... 72
1.7 Normalized Joint Shear Demand (�� ) .................................................... 74
1.8 Normalized Joint Shear Capacity (�� ) .................................................... 76
1.9 Anchorage Length ( and ) ........................................................... 79
1.10 Deformation Capacity, ( and u D ) ....................................................... 82
2 Failure Modes ......................................................................................... 85
Chapter 4 ANALYTICAL RESULT .................................................................... 92
1 Proposed Joint Shear Strength Model (Refined Strut-and-Tie Analytical
Model-RSTA) ......................................................................................... 92
2 Verification and Comparison of the Proposed Models ........................ 101
2.1 Specimens Failed in NY Mode ............................................................. 102
2.2 Specimens Failed in Y Mode ................................................................ 103
3 Design Recommendation ...................................................................... 104
Chapter 5 CONCLUSION ................................................................................... 121
1 Conclusion ............................................................................................ 121
REFERENCES ......................................................................................................... 124

                                

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