Numerical Investigation of the behavior of steel frames Under the effect of Natural Fire Condition

摘要

By glancing at the past and studying the statistics and numerics of the history of fire accidents, we discover that human beings have always been in compliance with fire in buildings and paid heavy costs in regard with this issue. Such that, every year, a number of citizens lose their lives or are wounded as a result of fire in different buildings. In additions, billions of dollars of state assets are destroyed by fire. Regarding this issue, in this paper, two different fire scenarios for two 3D frames of one-story and five-story with four spans of 4 meters will be defined. The prediction of the horizontal and vertical deformation of structural members under the effect of fire is among the important results of this research using displacement-temperature analysis of finite element method in the ABAQUS application and dynamic behavior of the structure is monitored in any second of fire simulation. Critical amount of the heat, which it is applied in the case studies of this research, was at least 700 ~ 900 ° C and several instability have been reported.