2008: V10- N.C.P Nagaraj (d-b-n)

Vortrag N.C.P. Nagaraj (d-b-n Salzgitter) "Robust Method of Exact Analysis of Reinforced Concrete Columns in Fire"Abstract:The aim of this work is to bring the exact - Thermo-mechanical - analysis of reinforced concrete columns under fire exposure to the level of a structural engineering design office maintaining the high degree of scientific basis for the analysis. The basic principles of mechanics involved in a thermo-mechanical analysis are the same as when designing a composite bridge deck with differential strains due to creep and shrinkage of the concrete plate element as against the steel member across the cross section. In the case of a column exposed to fire the differential material properties across the section which is temperature dependent and thermal strains inducing residual forces have to be resolved und considered while determining the bearing capacity of the column. The proposed method is based on the moment-curvature method and discretizes the temperature zones across the column section. This is done by defining the cross section of the column as a composite section. The section is divided into layers identical to the temperature fields determined with a 2D-Heattransformation analysis of the column section to be analysed. The EC2 has provided the basics for a scientific method of analysis which enables the structural engineer to estimate the safety level of the structural member under fire conditions. The proposed method of exact analysis uses commercial structural engineering software, to perform the geometric and material non linear analysis with thermal properties, the fire exposure can be 1 face to 4 faces heating and the column section shape is not restricted.Sie finden diesen Vortrag auf unserem ftp-server im geschützten Downloadbereich (Login/Password erforderlich)

Type SOFiSTiK Seminar Lectures
Productgroup Structural / Dynamics / FEA
Date 11.04.2008
Keywords Seminar-2008, Robust Method of Exact Analysis of Reinforced Concrete Columns in Fire