Fire Resistance of Steel and Timber Structures

Garant předmětu:

František Wald

Přednášející:

Petr Kuklík, František Wald

Cvičící:

Lukáš Velebil

Předmět zajišťuje:

katedra ocelových a dřevěných konstrukcí

Anotace:

The aim of this course is to give students an understanding of the design methods of structures at accidental situations, fire and explosion. The course is focussed on design methods involved in fire design: prediction of fire scenario, evaluation of fire load, calculation of gas temperatures in the fire compartment and structural analysis at elevated temperature. Special attention is paid to fire modelling when several design models is presented including nominal temperature curves, simple models and advanced models.

Požadavky:

Basic design of steel and timber structures at ambient temperature.

Osnova přednášek:

1 Introduction to fire safety

1.1 - Fire safety, classification of structures, fire compartments, escape routes (general overview)

1.2 - Natural fire and its relation to design to fire safety

2 Fire load and models of fire

2.1 - Fire load density, characteristic and design load, effect of active fire measures, rate of heat release, fire scenarios

2.2 - Simple models for compartment fires, nominal fire curves, parametric temperature curve

Practical calculation of fire load density for simple compartment, evaluation of temperature curve, comparison of different models, advantages and disadvantages of simple models

2.3 - Advanced fire for compartment fires, zone models, CFD models

Application of software to apply zone models for thermal analysis, overview of CFD analysis

2.4 - Fire load for localised fires, modelling of localised fires

2.5 - Accidental load combination, structural analysis at fire

3 Transfer of heat to steel structures

3.1 - Temperature of unprotected steel elements at fire, fire protection of steel structures, temperature of protected steel elements at fire

3.2 - Video from large scale fire test in Cardington, example of analysis of steel structure in Cardington

4 Fire resistance of steel structures

4.1 - Material properties of steel at high temperatures

4.2 Fire resistance of steel elements Models

4.3 - Design of joints

5 Fire resistance of steel and concrete composite structures

5.1 - Fire resistance of composite slab

5.2 - Resistance of composite beams

5.3 - Resistance of composite columns

6 Fire resistance of timber structures

6.1 - Behaviour of timber structures exposed to fire, fire protection of timber structures

6.2 - Design method for timber structures

7 Fire resistance of timber elements

7.1 Method of effective cross-section, method of reduced stiffness and strength

7.2 Design of joints

8 Advanced models in fire engineering

8.1. Modelling of fire, transfer of heat and mechanical behaviour

8.2 Floor behaviour

8.3 Robustness of structures

Osnova cvičení:

1. Fire modelling

2. Transfer of heat

3. Steel beams

4. Steel columns

5. Composite beam

6. Composite column

7. Timber beam

8. Timber columns

Cíle studia:

The course is conceived in order to give students following skills:

To understand the basic methods in fire engineering.

To be able to develop possible fire scenarios and to understand various fire models.

To predict the gas temperature in the fire compartment for the selected fire scenarios, to evaluate the fire load density and other fire parameters necessary for thermal analysis of the fire compartment.

To be able to predict temperature of unprotected and protected structural elements and to be able to select / design suitable fire protection of those elements.

To understand the specific problems related to structural analysis at fire. To be able to predict the mechanical load at fire and calculate internal forces of simple structures exposed to fire.

To understand the effect of high temperature on mechanical properties of steel, concrete, timber and aluminium alloys. To be able to design steel, concrete, steel-concrete composite, timber and aluminium structures exposed to fire.

To understand the purpose of fire testing, measurements and equipment of fire testing laboratory, large scale testing.

To understand the models for load by explosion in open and closed space, structural analysis at explosion, structural damages and repair of structures.

To understand the robustness of structures and to be able to design simple structures to ensure structural integrity.

Studijní materiály:

Franssen J.M., Vila Real P., Fire Design of Steel Structures - 2nd Edition, ECCS and Ernst & Sohn, 2015, ISBN 978-92-9147-128-7.

Wang Y.C., Burgess I.W., Wald F., Gillie M., Performance-Based Fire Engineering of Structures, 1. ed., CRC Press, 2012, ISBN 978-0415557337.

Parkinson D.L., Kodur V., Sullivan P.D., Performance-Based Design of Structural Steel for Fire Conditions: A Calculation Methodology, American Society of Civil Engineers, 2009, ISBN 978-0-7844-0963-3.

Lennon T., Moore D.B., Wang Y.C., Bailey G.G., Designer's Guide to EN 1991-1-2, EN 1992-1-2, EN 1993-1-2 and EN 1994-1-2, Thomas Telford, 2007, ISBN 978-0727731579.

Poznámka:

Basic design of steel and timber structures at elevated temperature during fire.

Další informace:

http://fire.fsv.cvut.cz/index.htm

Pro tento předmět se rozvrh nepřipravuje

Předmět je součástí následujících studijních plánů:

• Civil Engineering (povinně volitelný předmět)