ANALYSIS ON GLOBAL MECHANICS PROPERTIES OF LARGE-SPACE STEEL STRUCTURES UNDER FIRE CONDITIONS

摘要

Large-space structures, which are mostly used for public constructions and industrial buildings, have developed rapidly in China. However, traditional fire-resisting method in China nowadays can not be applied to this kind of structure. It's necessary to make research on global mechanics properties of common types of large-space structures as it will help realize the performance of the structure under fire conditions. In this paper, several typical kinds of large-space structures such as portal frames, grid structures and pre-stressed structures etc. Were analyzed by an FEA soft package ANSYS under diversified fire conditions. Some discussions were made on the hast of the characteristics of types of structures to their performance when fire occurred.