基于损伤塑性模型的核电站超大型冷却塔损伤分析  

Damage Analysis of Nuclear Power Plant Super Cooling Tower Based on Damage Plastic Model

作　　者：刘立威[1] 马兆荣[1] 刘东华[1] 

机构地区：[1]中国能源建设集团广东省电力设计研究院有限公司,广州510663

出　　处：《南方能源建设》2015年第B12期105-107,共3页Southern Energy Construction

摘　　要：以非线性有限元方法为基础,采用混凝土损伤塑性模型,对风荷载作用下核电站超大型冷却塔进行结构非线性分析,得到了冷却塔结构塑形损伤的发生及演变规律。通过分析发现,核电站超大型冷却塔在极端风荷载的作用下,塔身塑形损伤首先产生在塔顶刚性环处,随着荷载的增加,迎风面二分之一塔高处出现平行塑性损伤带并呈45°向下发展,直至塔体丧失承载能力。该研究成果对核电站冷却塔设计及安全评估有重要指导意义。Based on nonlinear FEM method,the author adopt concrete damage plastic model,analyze the structure nonlinear behavior in different load cases,and obtain the occurrence and development of the plastic damage of cooling tower.The analysis reveals that the damage of cooling tower occur at the top firstly and some paralleling damage zones occur at the height of half the tower which will develops 45 degrees downward.The development of the damage will continue until the cooling tower losing bearing capacity.The results is very meaningful for the design of nuclear power plant cooling tower as well as the safety evaluation.

关 键 词：核电站超大型冷却塔 非线性 塑性损伤 

分 类 号：TU347[建筑科学—结构工程]