摘要
通过对影响火灾后高强混凝土结构性能的主要因素进行分析,选择抗压强度损失系数、耐久性损失系数、爆裂损失系数和裂纹损失系数作为评价指标,以投影寻踪回归理论为基础,采用人工鱼群算法寻求最优投影方向,建立了投影寻踪综合评价模型,提出了综合评定火灾后损伤混凝土性能的方法,根据投影特征指标值对高强混凝土火灾后的性能进行了综合评价。研究表明,该方法避免了评判专家人为确定权重,评价结果客观准确、方法简单,为混凝土结构火灾损伤的诊断评估与修复加固提供了科学依据。
The main factors influencing the properties of the high--strength concrete （HSC） structure exposed to fire were analyzed, and the strength damage coefficient, durability damage coefficient, spalling degree and crack width of HSC were chosen as the criterion indices for concrete structure classification. Based on the theory of projection pursuit, the projection direction of which was optimized using Artificial Fish-Swarm Algorithm, a method of evaluating the damage of HSC exposed to fire was established, which could comprehensively assesse the capability of HSC based on the projecting feature indices. The model was applied to an example, and the evaluating results were accurate. This method is simple, and some errors are eliminated compared to the traditional methods based on expert judgments. Projection Pursuit is a new evaluation method of judging and classifying the fire damage to HSC.
出处
《消防科学与技术》
CAS
北大核心
2009年第9期627-630,共4页
Fire Science and Technology
基金
国家自然科学基金资助项目(50768001)
关键词
高强混凝土
受火损伤
投影寻踪回归
人工鱼群算法
综合评价
high-strength concrete
damaged by fire
projection pursuit
Artificial Fish-Swarm Algorithm
comprehensive evaluation
