火灾后混凝土结构建筑应急加固方案优选研究

Research on optimum selection of emergency reinforcement scheme for concrete structures after fire

火灾的发生,给人们的生命安全和经济财产都造成了巨大的损失,并且给建筑本身的结构埋下了极大的安全隐患.为了确保人们的生命和财产安全,同时保证建筑结构的安全,需要采取应急加固工作.但是,加固方案要求工艺简单且易于操作,同时需要结合承载力和抗震性能的要求,在此基础上做到经济合理.因此,针对我国火灾后钢筋混凝土结构建筑应急加固的工作特点,本文构建了基于加权广义马氏距离改进TOPSIS方法的火灾后混凝土结构建筑应急加固方案优选模型,并将模型应用于某实例中,通过应用SAP2000对加固前后的承载能力对比分析表明,各项指标显著提升.研究结果表明,该模型是熵权理论、加权广义马氏距离理论、TOPSIS理论的有机结合,为定量研究火灾后混凝土结构建筑应急加固方案优选工作提供了新的思路.

The occurrence of fire has caused huge losses to people's life safety and economic property,and has buried great safety hazards in the structure of the building itself.In order to ensure the safety of people′s lives and property,while ensuring the safety of the building structure,emergency reinforcement work is needed.However,the reinforcement scheme requires simple technology and easy operation,and at the same time,it needs to combine the requirements of bearing capacity and seismic performance,and be economical and reasonable on this basis.Therefore,in view of the characteristics of China's steel reinforced concrete structure after fire emergency reinforcement,this paper constructs an improved TOPSIS method of weighted generalized Mahalanobis distance based on the fire emergency plan optimization model of concrete structure reinforcement,and the model is applied to a fire engineering example,through the comparison of application of SAP2000 on the main performance before and after the reinforcement analysis shows that the the index has significantly improved.The research results show that the model is an organic combination of entropy weight theory,weighted generalized Mahalanobis distance theory and TOPSIS theory.It provides a new idea for quantitative research of reinforcement scheme optimization of concrete structure after fire.