Fire Design of Steel Structures: Eurocode 1: Actions on structures; Part 1-2: General actions -- Actions on structures exposed to fire; Eurocode 3: Design of steel structures; Part

This book explains and illustrates the rules that are given in the Eurocode for designing steel structures subjected to fire. After the first introductory chapter, Chapter 2 explains how to calculate the mechanical actions (loads) in the fire situation based on the information given in EN 1990 and EN 1991. Chapter 3 presents the models to be used to represent the thermal action created by the fire. Chapter 4 describes the procedures to be used to calculate the temperature of the steelwork from the temperature of the compartment and Chapter 5 shows how the information given in EN 1993-1-2 is used to determine the loan bearing capacity of the steel structure. The methods use to evaluate the fire resistance of bolted and welded connections are described in Chapter 7. Chapter 8 describes a computer program called "Elefir-EN" which is based on the simple calculation model given in the Eurocode and allows designers to quickly and accurately calculate the performance of steel components in the fire situation. Chapter 9 looks at the issues that a designer may be faced with when assessing the fire resistance of a complete building. This is done via a case study and addresses most of the concepts presented in the earlier Chapters. The concepts and fire engineering procedures given in the Eurocodes may see complex those more familiar with the prescriptive approach. This publication sets out the design process in a logical manner giving practical and helpful advice and easy to follow worked examples that will allow designer to exploit the benefits of this new approach to fire design.

Table of Contents:
INTRODUCTION Relations between different Eurocodes Scope of EN 1993-1-2 MECHANICAL LOADING General Examples Indirect actions THERMAL ACTION Nominal temperature-time curves Parametric temperature-time curves Zone models; CFD models Localized fires External members TEMPERATURE IN STEEL SECTIONS The heat conduction equation and its boundary conditions Advanced calculation model. Finite element solution of the heat conduction equation Section factor Temperature of unprotected steelwork exposed to fire Temperature of protected steelwork exposed to fire Internal steelwork in a void protected by heat screens External steelwork Example View factors in the concave part of a steel profile Temperature in steel members subjected to localized fires Temperature in stainless steel members Example MECHANICAL ANALYSIS Basic principles 99 Mechanical properties of carbon steel 104 Classification of cross-sections 109 Fire resistance of structural members 118 Tension members; Compression members; Shear resistance; Laterally restrained beams; Laterally unrestrained beams; Members with Class 1, 2 or 3 cross-sections, subjected to combined bending and axial compression; Members with Class 4 cross-sections; Some verifications of the fire resistance not covered by EN 1993-1-2 Design in the temperature domain. Critical temperature Design of continuous beams Fire resistance of structural stainless steel members Design examples ADVANCED CALCULATION MODELS Thermal response model Mechanical response model JOINTS Strength of bolts and welds at elevated temperature Temperature of joints in fire Bolted connections Design fire resistance of welds Design examples THE COMPUTER PROGRAM "ELEFIR-EN" Brief description of the program Default constants used in the program Design example CASE STUDY Fire resistance under standard fire Thermal calculations Structural calculation Fire resistance under natural fire Temperature development in the compartment REFERENCES ANNEX A THERMAL DATA FOR CARBON STEEL AND STAINLESS STEEL SECTIONS A.1. Thermal properties of carbon steel A.2. Section factor Am / V [m-1] for unprotected steel members A.3. Section factor Ap / V [m-1] for protected steel members A.4. Tables and nomograms for evaluating the temperature in unprotected steel members subjected to the standard fire curve ISO 834 A.5. Tables and nomograms for evaluating the temperature in protected steel members subjected to the standard fire curve ISO 834 A.6. Thermal properties of some fire protection materials A.7. Thermal properties of stainless steel A.7.1. Specific heat A.7.2. Thermal conductivity A.7.3. Thermal elongation A.8. Tables and nomograms for evaluating the temperature in unprotected stainless steel members subjected to the standard fire curve ISO 834 A.9. Thermal properties of some fire compartment lining materials ANNEX B INPUT DATA FOR NATURAL FIRE MODELS B.1. Introduction B.2. Fire load density B.3. Rate of heat release density B.4. Ventilation control B.5. Flash-over ANNEX C MECHANICAL PROPERTIES OF CARBON STEEL AND STAINLESS STEEL C.1 Mechanical properties of carbon steel C.1.1. Mechanical properties of carbon steel at room temperature (20ºC) C.1.2. Stress-strain relationship for carbon steel at elevated temperatures (without strain-hardening) C.1.3. Stress-strain relationship for carbon steel at elevated temperatures (with strain-hardening) C.1.4. Mechanical properties to be used with Class 4 cross-section and simple calculation models C.2. Mechanical properties of stainless steel ANNEX D TABLES FOR SECTION CLASSIFICATION AND EFFECTIVE WIDTH EVALUATION ANNEX E SECTION FACTORS OF EUROPEAN HOT ROLLED IPE AND HE PROFILES ANNEX F CROSS-SECTIONAL CLASSIFICATION OF EUROPEAN HOT ROLLED IPE AND HE PROFILES F.1. Cross-sectional classification for pure compression and pure bending F.2. Cross-sectional classification for combined, compression and bending moment

About the Author :
Jean-Marc Franssen ist Professor im Fachbereich Architektur, Geologie, Umwelt und Bau der Universität Liège in Belgien. Er ist Leiter der Fachgruppe Brandschutztechnik und Direktor des Labors für Brandschutz. Auch gehört er dem technischen Ausschuss TC3 "Fire" der EKS an. Professor Franssen ist ebenfalls Initiator der Bewegung "Structures in Fire (SiF)" und Vorsitzender dessen Lenkungsausschusses. Er war ebenfalls Mitglied der Normenarbeitsgruppe zu EN 1993-1-2. Paulo Vila Real ist Professor im Fachbereich Bauingenieurswesen der Universität Aveiro, Portugal und Direktor des dortigen Labors für Brandschutz. Er gehört dem technischen Ausschuss TC3 "Fire" der EKS und dem Lenkungsausschuss der Bewegung "Structures in Fire (SiF)" an. In Portugal ist er Mitglied des technischen Ausschusses CT 115 "Eurocodes" und erarbeitete die nationalen Dokumente zu den Brandschutzregeln der Eurocodes in den Bereichen Lasteinwirkungen, Beton-, Stahl-, Verbund- und Aluminiumtragwerke. Jean-Marc Franssen ist Professor im Fachbereich Architektur, Geologie, Umwelt und Bau der Universität Liège in Belgien. Er ist Leiter der Fachgruppe Brandschutztechnik und Direktor des Labors für Brandschutz. Auch gehört er dem technischen Ausschuss TC3 "Fire" der EKS an. Professor Franssen ist ebenfalls Initiator der Bewegung "Structures in Fire (SiF)" und Vorsitzender dessen Lenkungsausschusses. Er war ebenfalls Mitglied der Normenarbeitsgruppe zu EN 1993-1-2. Paulo Vila Real ist Professor im Fachbereich Bauingenieurswesen der Universität Aveiro, Portugal und Direktor des dortigen Labors für Brandschutz. Er gehört dem technischen Ausschuss TC3 "Fire" der EKS und dem Lenkungsausschuss der Bewegung "Structures in Fire (SiF)" an. In Portugal ist er Mitglied des technischen Ausschusses CT 115 "Eurocodes" und erarbeitete die nationalen Dokumente zu den Brandschutzregeln der Eurocodes in den Bereichen Lasteinwirkungen, Beton-, Stahl-, Verbund- und Aluminiumtragwerke.