Study on the Strength Development of Side-Face Blowout Failure Mode for High-Strength Reinforcements in B/C Joints

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研究生：	陳威仁 Reynaldo Pratama Intan
論文名稱：	Study on the Strength Development of Side-Face Blowout Failure Mode for High-Strength Reinforcements in B/C Joints Study on the Strength Development of Side-Face Blowout Failure Mode for High-Strength Reinforcements in B/C Joints
指導教授：	邱建國 Chien-Kuo Chiu
口試委員:	王勇智 Yung-Chih Wang 林克強 Ker-Chun Lin 鄭敏元 Min-Yuan Cheng
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：	2018
畢業學年度：	106
語文別：	英文
論文頁數：	172
中文關鍵詞：	Headed Bar 、Anchorage 、Beam-Column Joint 、Failure Mode 、ANSYS 、High-strength material
外文關鍵詞：	Headed Bar, Anchorage, Beam-Column Joint, Failure Mode, ANSYS, High-strength material
相關次數：	點閱：174 下載：1
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The application of headed bar as an anchorage in the concrete structure is increasingly popular. Headed bar become a solution to solve the congestion problem, simpler installation, reduction in steel used, and potentially shorter anchorage or embedded lengths at the beam-column joint. There is already some design code for headed bar based on various failure modes. However, the limitation of the fc' and fy value on those design codes are in the range of normal strength value. Therefore, this study is conducted to find the behavior of the headed bar embedded in the high-strength concrete.
This research will start with the comparison or parametric study of several anchorage capacity equations which based on various failure mode to find out which failure mode is critical in the high strength beam-column joint. This research is using typical exterior beam-column joint as the study case. After identifying the failure mode, this research comes with side-face blowout failure mode as the most dangerous failure mode, and thus the total of 81 specimen data that is assessed using ANSYS, although only 12 specimen data that is constructed.
Side-face blowout and yield of the steel bar are the critical failure mode to high-strength beam-column joint with headed bar as the anchorage. Based on the ANSYS results, the effect of the variable fc', fy, db,and C to anchorage capacity of the joint can be known. Chun (2017) capacity equation also doing a good job to predict the side-face blowout failure which is analyzed by ANSYS.

ABSTRACT    i
ACKNOWLEDGEMENT    ii
TABLE OF CONTENTS    iii
LIST OF TABLES    vi
LIST OF FIGURES    vii
NOTATION    xii
Chapter 1.    INTRODUCTION    1
1.1    Background and Research Motivation    1
1.2    Objectives and Scope of the Research    3
1.3    Organization and Thesis Overview    3
Chapter 2.    LITERATURE REVIEW    5
2.1    Failure Mode of the Headed Bars.    5
2.2    Proposed Model for Anchorage Strength of Headed Bar.    9
2.2.1    Prediction Models of the Anchorage Strength of Headed bars DeVries (1996)    14
2.2.2    Prediction Models of the Anchorage Strength of Headed bars Bashandy (1996).    19
2.2.3    Prediction Models of the Anchorage Strength of Headed bars Thompson et al (2006).    22
2.2.4    Prediction Models of the Anchorage Strength of Headed bars Chun et al. (2017).    25
2.2.5    Prediction Models of the Anchorage Strength of Headed bars Chun (2015).    29
2.3    Design Code of the Headed Bars ACI 318.    33
2.3.1    ACI 318-14 Section 25.4.4.    33
2.3.2    ACI 318-14 Section 17.4.3.    37
2.3.3    ACI 318-14 Section 17.4.1.2    38
Chapter 3.    PARAMETRIC STUDY AND SPECIMEN DESIGN    39
3.1    Case Study of Exterior Beam-Column T-Joint Anchorage by Headed Bar.                39
3.2    Design of Exterior Beam-Column T-Joint Specimen for Headed Bar Anchorage of High Strength Material.    55
Chapter 4.    FINITE ELEMENT ANALYSIS    61
4.1    ANSYS Software    61
4.1.1    Element Types    61
4.1.2    Material Properties    63
4.2    Modelling of Side-Face Blowout Failure Mode of Chun (2017) Specimen.        68
4.3    Modelling of Concrete Breakout Failure Mode of Hong (2007) Specimen.            76
4.4    Analysis of Beam-Column Joint Specimen.    81
Chapter 5.    RESULTS AND DISCUSSION    85
5.1    Capacity Results of Beam-Column Joint Specimen    85
5.2    The Effect of Concrete Compression Strength (fc' ) to The Normalized Capacity of Anchorage Strength (P/Py ).    87
5.3    The Effect of Steel Tension Strength (fy ) to The Normalized Capacity of Anchorage Strength (P/Py ).    90
5.4    The Effect of Bar Diameter (db ) to The Normalized Capacity of Anchorage Strength (P/Py ).    92
5.5    The Effect of Concrete Cover to Bar (C ) to The Normalized Capacity of Anchorage Strength (P/Py ).    94
5.6    Comparation Between Yield Capacity of the Bar and Side-Face Blowout Failure Mode.    97
5.7    Comparison of Capacity Equation Based on Side-Face Blowout Failure Mode.    113
Chapter 6.    CONCLUSION AND FUTURE RESEARCH    119
6.1    Conclusion    119
6.2    Suggestion and Future Research.    120
REFERENCES    121
APPENDIX    123

                                

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