Comparative Analysis of the Reliability of Steel Structure with Pinned and Rigid Nodes Subjected to Fire

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Kubicka, Katarzyna^1 ; Rado, Urszula^1 ; Szaniec, Waldemar^1 ; Pawlak, Urszula^1

Kielce University of Technology, Poland^1

关键词: Comparative analysis;    High temperature;    Reliability Index;    Safety of structures;    Spatial structure;    Static strength analysis;    Technological researches;    University of technologies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/2/022051/pdf
DOI  :  10.1088/1757-899X/245/2/022051

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The paper concerns the reliability analysis of steel structures subjected to high temperatures of fire gases. Two types of spatial structures were analysed, namely with pinned and rigid nodes. The fire analysis was carried out according to prescriptions of Eurocode. The static-strength analysis was conducted using the finite element method (FEM). The MES3D program, developed by Szaniec (Kielce University of Technology, Poland), was used for this purpose. The results received from MES3D made it possible to carry out the reliability analysis using the Numpress Explore program that was developed at the Institute of Fundamental Technological Research of the Polish Academy of Sciences [9]. The measurement of reliability of structures is the Hasofer-Lind reliability index (β). The reliability analysis was carried out according to approximation (FORM, SORM) and simulation (Importance Sampling, Monte Carlo) methods. As the fire progresses, the value of reliability index decreases. The analysis conducted for the study made it possible to evaluate the impact of node types on those changes. In real structures, it is often difficult to define correctly types of nodes, so some simplifications are made. The presented analysis contributes to the recognition of consequences of such assumptions for the safety of structures, subjected to fire.