建筑火灾结构安全数值模拟框架

为了模拟建筑火灾过程中的火灾发展、结构响应及其相互作用提出了该模拟框架。该框架以现有的火灾模拟和结构分析数值模拟软件为基础,通过对其输入文件和模拟结果文件所含信息进行重新建模构成建筑火灾过程的数据环境,根据物理实验研究成果开发了材料高温强度退化和结构破坏方面的数值分析模块,与基础模拟软件一起构成覆盖灾难全过程的数值环境。该框架采用了面向对象的数据建模方法和系统集成技术,使得不同模拟模块的数据对象相互对应并协调工作,并能自动控制各模块实现对火灾过程的模拟,实现了在一个数据环境和一个软件平台上进行建筑火灾结构安全模拟。该框架为建筑火灾研究提供了数值实验方法,具有廉价和快速的特点,也是将实验室研究成果应用于具体建筑仿真的途径,对于建筑火灾性能化设计,消防救援预案的确定和火灾风险评估具有实用价值。

A simulation framework for structural safety in building fire

A simulation framework was designed to monitor the structural performance of a building during the process of fire.The framework is constructed on the basis of two existing software packages,one is for fire simulation and the other is for structural analysis.By refining and remodeling the data from the input and output files of the existing software,a numerical environment was established for the fire process.Based on the findings from physical experiments,two program modules for predicting material degradation under high temperatures and structural failure,respectively,were developed.These modules together with the basic framework form a numerical environment for simulation of the building fire process.The framework was developed using the object-oriented data modeling and system integration approach.By so doing,data objects from different modules can be easily coordinated with each other,and the modules can be scheduled automatically during the process of fire.Therefore,by use of the framework,structural safety in a building fire can be readily simulated in a single numerical environment under the same platform.In addition,the framework offers a new option for the study of fire disaster by numerical simulations and the method is both efficient and cost-effective.Indeed,the present research shows that one can bring the study in the laboratory to the simulation of real-world building fire.It is also useful for performance-based fire engineering design.