某报告厅屋顶钢桁架防火设计

FIRE PROTECTION DESIGN OF STEEL TRUSS ON THE ROOF OF LECTURE HALL

随着结构达到设计工作年限、建筑功能用途改变等原因,建筑本身面临结构改造、局部拆除或构件更换等问题。对于新更换的钢结构不仅要满足正常使用和承载能力极限状态的要求,还应满足火灾条件下规定时间内正常发挥功能的能力。以某报告厅结构改造工程为例,对其屋顶新更换的钢桁架采用有限元软件midas Gen进行耐火验算与防火设计研究,以为后期同类项目开展结构防火设计提供参考。

As the structure reaches the design service life and the building's functional use changes,the building faces problems such as structural transformation,partial demolition or component replacement.For newly replaced steel structures,they should not only meet the requirements of normal use and ultimate bearing capacity,but also meet the ability to function normally within the specified time under fire conditions.This article takes the structural renovation project of a certain auditorium as an example to conduct fire resistance calculation and fire protection design research on the newly replaced steel truss on its roof using finite element software midas Gen,providing reference for future similar projects to carry out structural fire protection design.