iTECH 보의 내화성능에 대한 해석적 연구 : Analytical Investigation on the Fire Resistance of the iTECH Beam
- 발행기관 고려대학교 대학원
- 발행년도 2004
- 학위명 박사
- 학과 대학원:강구조공학협동과정
- 식별자(기타) DL:000014914431
- 서지제어번호 000045208536
초록/요약
Height considerations have become a significant factor in the construction of high-rises due to the limited space in the metropolis. The Innovative Technical Economical & Convenient Hybrid (iTECH) beam system has been developed to reduce the height of residential and commercial building. The iTECH beam system, which is partly encased by concrete, has inherent good fire resistance. The temperature distribution of the iTECH beam under two fire conditions was analyzed by using the finite element program (Ansys 6.1) in this study. The International Standards Organization (ISO) standard fire and the Eurocode parametric fire were adopted for the target fire conditions. The load-carrying capacity of the iTECH beam under fire was evaluated according to Eurocode 1 Part 2.2 to analyze the contributions of the section parts to the plastic moment capacity during a fire. The structural fire resistance of the iTECH beam was investigated under the parametric natural fires defined by Annex B of Eurocode 1 Part 2.2. The major analytical parameters in the study were the opening factor (ventilation factor) , and the fire load density per unit floor area . The relationship between the minimum load ratio and the fire parameters were discussed in detail.
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ABSTRACT
TABLE OF CONTENTS
LIST OF FIGURES
LIST OF TABLES
GLOSSARY OF TERMS
SYMBOLS
CHAPTER I INTRODUCTION
1.1 Research Background and Objective
1.2 Organization of Thesis
1.3 Literature Review
1.3.1 Broadgate Phase 8 Fire, London
1.3.2 BRE Cardington Test Facility Tests
CHAPTER Ⅱ MATERIAL PROPERTIES AT ELEVATED TEMPERATURES AND FUNDAMENTAL THEORY OF HEAT TRANSFER
2.1 Steel Thermal Properties
2.1.1 Thermal Conductivity
2.1.2 Specific Heat
2.1.3 Thermal Expansion
2.2 Mechanical Properties of Steel
2.2.1 Ambient Properties
2.2.2 Properties at Elevated Temperatures
2.3 Concrete Thermal Properties
2.3.1 Thermal Conductivity
2.3.2 Specific Heat
2.3.3 Thermal Expansion
2.4 Mechanical Properties Concrete
2.4.1 Ambient Properties
2.4.2 Properties at Elevated Temperatures
2.5 Fundamental Theory of Heat Transfer
2.5.1 Convection Heat transfer
2.5.2 Radiation Heat transfer
CHAPTER Ⅲ THE iTECH SYSTEM AND FIRE PHENOMENA OF BUILDINGS
3.1 Introduction to the iTECH System
3.2 Fire Phenomena of Buildings
3.2.1 General Progress of Building Fire
3.2.2 Influence Factor of Fire Development
3.3 ISO 834 Standard Fire
3.4 Eurocode Parametric Fire
CHAPTER IV TEMPERATURE ANALYSIS OF iTECH BEAM EXPOSED TO FIRE
4.1 Introduction to Temperature Analysis
4.1.1 Background and Assumption of Temperature Analysis
4.1.2 Finite Element Shape
4.1.3 Temperature Analysis Model
4.2 Fire Temperature-Time Curve
4.3 Temperature Distribution
CHAPTER V RESISTANCE ANALYSIS OF iTECH BEAM EXPOSED TO FIRE
5.1 Introduction to Resistance Analysis
5.2 Resistance Analysis for ISO Standard Fire
5.2.1 Sagging Moment Resistance Analysis for iTECH Beam
5.2.2 Hogging Moment Resistance Analysis for iTECH Beam
5.3 Resistance Analysis for Eurocode Parametric Fire
CHAPTER VI CONCLUSIONS AND FUTURE RESEARCH
6.1 Conclusions
6.2 Future Research
APPENDIX A
A-1 FIRE SAFETY ENGINEERING
A-2 FIRE PROTECTION ENGINEERING
A-3 STRUCTURAL FIRE ENGINEERING
REFERENCES
ACKNOWLEDGEMENTS
