In the article a prestressed hollow core slab is analysed. Fire resistance is estimated in accordance with the Eurocode, i.e. in two separate analyses, (i) the thermal and (ii) the mechanical analysis. With the thermal analysis, the time dependent temperature distribution across the cross-section of the slab is determined. Here the effect of the closed air cells is considered as well. We also assume that the slab is exposed to a standard fire curve (ISO 843). With the mechanical analysis which follows the stress and strain state of the slab subject to an increasing temperature due to fire is obtained. The computational failure indicates when fire resistance of the slab is reached. Typically, a rapid growth of viscous creep of steel represents the limit resistance of the slab.
F.18 Transfer of new know-how to direct users (seminars, fora, conferences)
COBISS.SI-ID: 6065505The objective of the paper is to present the effect of moisture in concrete onthe fire resistance of side-plated reinforced concrete (RC) beams. For this purpose an adequate new finite-element (FE) procedure is presented. The paper concludes with a parametric study, examining the impacts of the vapor-tight side plates, high initial moisture content and low initial permeability of concrete of the selected RC beam on the rate of the risk of concrete spalling.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 6355041This research work discusses the fire safety design for residential buildings in a comprehensive manner. Prescriptive rules and performance-based approach to fire safety design and the application of an advanced computer program for modelling a fire development in an enclosure are presented. A fire safety scheme of terraced houses is presented in graphical and textual forms according to the Slovenian codes. The focus of the present work is on numerical modelling of a fire spread in the ground floor of a terraced house, using the computer program Fire Dynamics Simulator. The effects of the mesh density, the area of origin of the fire, the temperature of ignition of an obstruction and the ventilation on fire dynamics are considered. The performance-based approach to design fire safety of structural elements is presented in the context of the fire analysis of a steel beam. The time evolution of air temperature around the beam is estimated with the use of the computer program Fire Dynamics Simulator for the worst case fire scenario. Simplified calculation methods given by the standard SIST EN 1993-1-2 are used to prove the fire resistance of a steel beam.
F.17 Transfer of existing technologies, know-how, methods and procedures into practice
COBISS.SI-ID: 6221921A novel strain-based finite element numerical model for the fire analysis of curved reinforced concrete (RC) beams is presented. In addition, the effect of load level and boundary conditions on fire resistance of the curved RC beam is observed.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 6237281