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Disclaimer 저작자표시. 귀하는 원저작자를 표시하여야 합니다. 동일조건변경허락. 귀하가 이 저작물을 개작, 변형 또는 가공했을 경우 에는, 이 저작물과 동일한 이용허락조건하에서만 배포할 수 있습니다. 공학박사학위 논문 지점의 상승하강 공법을 이용한 개구제형 강합성 거더교의 설계와 거동 Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method 2009 년 8 월 인하대학교 대학원 토목공학과 도다이탕 (Do Dai Thang) 공학박사학위 논문 지점의 상승하강 공법을 이용한 개구제형 강합성 거더교의 설계와 거동 Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method 2009 년 8 월 지도교수 : 구 민세 이 논문을 박사학위 논문으로 제출함 인하대학교 대학원 토목공학과 도다이탕 (Do Dai Thang) FF@FsPet'-" BsR600Z G&lb Eo++ b&{vinbA &["te= €*t [o Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method By Do Dai Thang A DISSERTATION Submitted to the faculty of INHA UNIVERSITY In partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPY Department of Civil Engineering August, 2009 - i - ABSTRACT This research investigates the behavior of open steel box girder bridge by up-down construction method. The steel box girder with open-trapezoidal cross section, partial-length prefabricated concrete slab and double composite section by cast-in-place concrete on bottom flange is considered. The three-dimensional finite element models, considering construction sequence in modeling, have been used to carry out the analysis. A parametric study is used to investigate the effects of some structural characteristics on the behavior of steel box girder. These parameters include the variation of lifting upward and lowering downward height, the length and depth of bottom concrete slab, the length of partial prefabricated concrete slab and the steel strength. A modification of the time-dependent behavior for double composite section with difference in ages and modulus of elasticity of top and bottom concrete slab are presented. An overview of the effect of lifting upward and lowering downward to the stability design such as web buckling and top lateral bracing are given. Optimization of the plate thickness of cross section by considering construction sequences is also presented as additional consideration. Finally the recommendations are made for the engineers to the design and construct steel box girder bridges by up-down construction method. - ii - TABLE OF CONTENTS Title Page No. Abstract i Table of Contents ii List of Figures v List of Tables xi CHAPTER 1 INTRODUCTION 1.1 Introduction 1 1.2 Objectives and Scope 2 1.3 Organization 4 CHAPTER 2 LITERATURE REVIEW 2.1 Fundamental of Up-Down Construction Method 6 2.2 Up-Down Construction Method Applied for Steel Box Girder 9 2.3 Double Composite 15 2.4 Partial Length Prefabricated Deck Concrete Slab 19 2.5 Proposed Up-Down Method for Open Steel Box Girder 20 2.6 Summary 26 CHAPTER 3 ANALYTICAL STUDIES 3.1 Finite Element Model Description 28 3.2 Nonlinear Finite Element Analysis Modeling 35 - iii - 3.4 Comparisons the Results 41 3.5 Summary 50 CHAPTER 4 PARAMETRIC STUDIES 4.1 Introduction 51 4.2 The Effect of Lifting-up and Lowering-down Height 52 4.3 The Effect of Bottom Concrete Slab 56 4.4 The Effect of Length of Partial Pre-fabricated Deck Concrete Slab 60 4.5 The Effect of Steel Strength 61 4.5 The Effect of the Top Flange 64 4.6 The Effect of Sequence Construction on Three, Four-Span Bridge 66 4.7 Summary 71 CHAPTER 5 TIME DEPENDENT ANALYSIS OF DOUBLE COMPOSITE SECTION 5.1 Prediction Models of Creep and Shrinkage 73 5.2 Modified Gilbert’ Method, an Accurate Time-Dependent Analysis with Consideration of Interval Time during Up-Down Method 76 5.3 Calculation of Short-term and Long-term Composite Section according to AASHTO LRFD Specification 89 5.4 Comparisons of the Result 90 5.5 Summary 96 - iv - CHAPTER 6 ADDITIONAL DESIGN CONSIDERATION 6.1 Stability Consideration 97 6.2 Suggested Construction Details 113 6.3 Optimum Cost of Steel Box-Girder by Varying Plate Thickness 117 6.4 Example Design and Evaluation 135 CHAPTER 7 SUMMARY AND CONCLUSIONS 7.1 Summary 141 7.2 Conclusions 143 7.3 Recommendations for Further Research 146 REFRENCES 148 APPENDIX A TIME DEPENDENT DESIGN OF COMPOSTIE STEEL BOX GIRDER BRIDGE A.1 Properties of Cross Section 155 A.2 Determination of Bending Moment during Construction Sequence 163 A.3 Time Dependent Analysis by Modification of Gilbert's Method 168 A.4 Time Dependent Analysis by AASHTO LRFD Provision 173 APPENDIX B DESIGN EXAMPLE B.1 Calculation Bending Stress for Model 1 176 B.2 Calculation Bending Stress for Model 2 181 ACKNOWLEDGEMENTS 188 - v - LIST OF FIGURES Figure Page No. 2.1 Single span 7 2.2 Two continuous spans 8 2.3 Steel box girder in two continuous spans 12 2.4 Detail install bottom slab in steel box girder applied up-down construction method 13 2.5 Double composite bridge Neuötting, (Hanswille, 2001) 17 2.6 Partial-length prefabricated steel box girder component 20 2.7 Construction sequence in two-spans continuous bridge 21 2.8 The normal stress at negative moment region 23 2.9 The normal stress at positive moment region 23 3.1 Example of Model 1 of two-span continuous bridge in ANSYS 30 3.2 Model 1: a) Girder Side view b) Cross section 32 3.3 Model 2: a) Girder Side view b) Cross section 33 3.4 Idealized stress-strain relationships for steel (Bureau et. al., 1998) 35 3.5 Uniaxial compressive and tensile stress-strain curve for concrete a) Real curve relationships (Bangash 1989) b) Idealized curve relationships (Hognestad, 1951) 36 [...]... elastic stresses of steel and concrete during construction stages by considering full-scale model of bridge with bracings, stiffeners and prefabricated concrete 1.2 Objectives and Scope The purpose of this research is to investigate the behavior of steel box girder bridge during applied up-down construction method This study investigates the open- trapezoidal cross section of steel box girder, the partial-length... innovative method of bridge construction in which supports are lifted up and lowered down during the construction stage to improve some of the structural characteristics of the bridge system It has been researched, developed, and applied over 200 bridges for prestressed concrete bridges, preflex bridges and steel box- girder bridges In order to understand the primary idea of up-down method, the comparison of. .. strength behavior of these types of structures during construction stage such as the lift-up and lower-down height, the thickness and length of bottom slab, the length of partial-length fabricated top -3- slab, the steel strength and the construction sequence for bridge with more than three spans continuous Task 5: Study the behavior of short-term and long-term of steel box girder during construction. .. construction method Up and down construction method is a new method for bridge construction in which interior supports are lifted up and lowered down during the construction stage to improve some of the structural characteristics of the bridge system It has been used for prestressed concrete bridges, preflex bridges and steel box- girder bridges (MANSECOREA website, 2007) In this construction method, the... use up-down method, it requires high pressure jack), greatly height pier (it is dangerous if we apply the upward loading), large span length, long time in construction 2.2 Up-down Construction Method Applied for Steel Box Girder The up-down construction method is developed and applied for two continuous spans (2@45m) of steel box girder in 2003, (MANCECOREA website, 2007) -9- Table 2.2 Types of up-down. .. additional design consideration, carry out the buckling analysis and discuss the stability design of steel box girder during up-down construction method Present an optimization of the plate thickness of cross section Do examples to compare the results between the conventional and proposed designs 1.3 Organization Chapter 2 provides the relevant theory dealing with fundamental of up-down construction method. .. composite with steel girder in developed system - 12 - a) Install stud inside steel box b) Hole in top flange to install bottom slab Fig 2.4 Detail install bottom slab in steel box girder applied up-down construction method A series design of rectangular steel box girder is presented in MANSCOREA website (2007) There is a 6.8% decrease in cross section height and 14.9% decrease in the amount of steel for... However, the existing up-down method for steel box- girder is uneconomical about material and construction time because of using closed rectangular section and full in-situ casting of concrete in the deck A steel box- girder with open- trapezoidal cross section and partial-length prefabricated concrete deck is proposed in this paper In order to evaluate practicability of proposed method, this study estimates... slab and double composite section at both negative moment area by casting bottom concrete slab A three-dimensional full scale model are selected and developed in detail for the modeling of steel box girder bridge structures The effects of some structural characteristics on the behavior of steel box girder are considered This -2- research also considers the changing cross section of steel box girder. .. computed by AASHTO standard Details of short-term and long-term analysis are also provided in this appendix Appendix B provides the EXCEL spreadsheet for the detailed calculation of design example -5- CHAPTER 2 LITERATURE REVIEW 2.1 Fundamental of Up-Down Construction Method Up and down construction method applied for bridge superstructure is invented and developed by Professor Koo Min-Se and his students . &["te= €*t [o Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method By Do Dai Thang A DISSERTATION Submitted to the faculty of INHA. 공학박사학위 논문 지점의 상승하강 공법을 이용한 개구제형 강합성 거더교의 설계와 거동 Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method 2009 년 8 월 지도교수 : 구 민세 이 논문을. 공학박사학위 논문 지점의 상승하강 공법을 이용한 개구제형 강합성 거더교의 설계와 거동 Behavior and Design of Open Steel Box Girder Bridges by Up-down Construction Method 2009 년 8 월 인하대학교 대학원 토목공학과