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研究生：	張忠偉 Rio Ananta Perangin-Angin
論文名稱：	梁腹開孔於A36鋼梁柱接頭耐震行爲之影響 The Effect of Reduced Web Section (RWS) Web Opening Size on Steel Beam-to-Column Connection Ductility
指導教授：	賴啟銘 Lai, Chi-Ming
共同指導教授:	張惠雲 Chang, Heui-Yung
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：	2022
畢業學年度：	110
語文別：	英文
論文頁數：	84
外文關鍵詞：	reduced web section (RWS) connection, finite element analysis, steel beam-to-column connection, weakened connection, seismic performance, rupture index
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The objectives of this study are to evaluate the recently developed design procedure of applying the reduced web section (RWS) method using dual-parallel-horizontal web openings on a steel beam-to-column connection and to study the effect of the opening size on the connection’s ductile behavior. A series of full-scale cyclic simulations were performed on several A36 steel bolted-web-and-welded-flange (BWWF) connection specimens using finite element analysis. It is found that the opening size obtained by referring to the previous design procedures that were developed using SN490B steel is too big to be applicable to A36 steel connection. It is also found that in terms of ductile behavior in the weld access hole (WAH) region, a relatively narrow-and-long opening provides lower rupture index on A36 beam-to-column connection compared to its deep-and-short counterparts, indicated by significantly lower rupture index within the region.

ABSTRACT .............................................................................................................................. iii FOREWORDS ...........................................................................................................................iv 
TABLE OF CONTENT ..............................................................................................................v 
LIST OF FIGURES .................................................................................................................. vii 
LIST OF TABLES ......................................................................................................................x 
NOMENCLATURE ...................................................................................................................xi 
CHAPTER 1 INTRODUCTION.................................................................................................1
1.1 Background..................................................................................................................1
1.2 Research Objectives ....................................................................................................3
1.3 Thesis Organization.....................................................................................................3
CHAPTER 2 LITERATURE REVIEW......................................................................................5
2.1. Bolted-Web-and-Welded-Flange (BWWF) Connection.................................................5 
2.2. Weakened Connection Methods.......................................................................................6 
2.3. Pre-Northridge Beam-Column Connection Test with ASTM A36 steel material ...........8 
2.4. Evaluation of Steel Connection Performance.................................................................10
2.4.1. AISC Seismic Provisions Requirement (2010) [1]..................................................10 
2.4.2. El-Tawil et al. (2000) [8].........................................................................................11 
2.4.3. Chen and Lin (2012) [7] ..........................................................................................13
2.5. The Seismic Performance of Connection with Dual Parallel Web Opening..................15
CHAPTER 3 RESEARCH METHOD......................................................................................19 
3.1. ANSYS and Finite Element Method ..............................................................................19 
3.2. Simulation Procedure .....................................................................................................21 
3.3. Structural Model .............................................................................................................22
3.4. Design Procedure for RWS Method with Web Opening ...............................................23 
3.4.1. Determine the value of parameter a ........................................................................24 
3.4.2. Assumed value of Sc................................................................................................25 
3.4.3. Determine the value of parameter DV ......................................................................29 
3.4.4. Determine the value of Lv .......................................................................................31 
3.4.5. Summary on Web Opening Design Parameter........................................................31
3.5. Specimen List .................................................................................................................31 
3.6. Material Model and Parameters......................................................................................33 
3.7. Contact Behavior ............................................................................................................36
3.8. Meshing, Element Types, and Mesh Quality .................................................................39 
3.9. Boundary Conditions and Displacement Load Protocol ................................................41
CHAPTER 4 RESULT AND DISCUSSION............................................................................44
4.1. FEM Model Validation...................................................................................................44
4.2. Load-Displacement Curve..............................................................................................45
4.3. Review on Web Opening Design Recommendation ......................................................48
4.4. The Effect of RWS Opening Size on Steel Beam-Column Connection Ductile Behavior ...............................................................................................................................................48
4.4.1. Principal Stress at 0.5% rad Drift ............................................................................49 
4.4.2. PEEQ Index at 4% rad Drift....................................................................................53 
4.4.3. Rupture Index ..........................................................................................................58
4.5. von-Mises Stress and Equivalent Plastic Strain Distribution .........................................63
CHAPTER 5 DESIGN RECOMMENDATION FOR OTHER OPENING SHAPE ...............66 
5.1. Introduction ....................................................................................................................66 
5.2. Vertical Opening Design Procedure (Hu, 2022) [17].....................................................67 
5.3. Specimen for Analysis....................................................................................................68 
5.4. Review on Design Recommendation for Vertical Opening Configuration....................69
 CHAPTER 6 CONCLUSION ...................................................................................................74 
6.1. Conclusion......................................................................................................................74
6.2. Further Research Suggestion ..........................................................................................75 
REFERENCES ..........................................................................................................................76
APPENDIX A REVIEW OF DUAL PARALLEL OPENING DESIGN PROCEDURES BY KANG (2022) [18] ....................................................................................................................78
A.1. Introduction ...................................................................................................................78 
A.2. Specimen for Analysis...................................................................................................79 
A.3. Analysis Result ..............................................................................................................80
APPENDIX B A36 STEEL MATERIAL VARIATION COEFFICIENT AND STRAIN HARDENING FACTOR...........................................................................................................84
                                    

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University, Tainan, Taiwan (2022)
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Column Connection with Beam Web Openings (Master’s Thesis), in Civil Engineering,
National Cheng Kung University, Tainan, Taiwan (2022)
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