安全壳结构内压极限承载能力分析  

ULTIMATE BEARING CAPABILITY ANALYSIS OF CONTAINMENT STRUCTURES SUBJECTED TO INTERNAL PRESSURE

作　　者：杨昕光 李吉娃 徐海翔[1,2] 刘凯 宋正峰[1,2] YANG Xinguang;LI Jiwa;XU Haixiang;LIU Kai;SONG Zhengfeng(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;Inspection and Certification Co.,Ltd.,MCC Group,Beijing 100088,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]中冶检测认证有限公司,北京100088

出　　处：《工业建筑》2021年第12期74-78,共5页Industrial Construction

基　　金：国家重点研发计划(2019YFB1900903);中国博士后面上基金项目(2019M650997)。

摘　　要：对安全壳内压破坏机理进行了探讨,确定了安全壳功能性失效破坏准则与结构性失效破坏准则,并采用混凝土损伤模型与非线性有限元数值模拟对“华龙一号”安全壳结构进行了内压极限承载能力分析,研究了安全壳结构在内压作用下的破坏过程,明确了安全壳结构的内压极限承压能力。计算结果表明:当内压增加至2.5倍设计压力时,安全壳首先在设备闸门口附近发生损伤开裂,并进入塑性工作状态;当内压增加至2.713倍设计压力时,钢内衬开始出现撕裂,说明安全壳已达到其功能性失效破坏极限状态;当内压增加至2.857倍设计压力时,安全壳混凝土在设备闸门口附近出现大面积损伤开裂,局部产生较大的位移而发生失稳破坏,达到其结构性失效破坏极限状态。The failure mechanics of containment subjected to internal pressure were studied, and the functional and structural failure criteria were determined. Then, based on the concrete damage model, the nonlinear finite element analysis of the HPR1000 containment was carried out in order to research the failure process and determine the ultimate bearing capability of the containment subjected to internal pressure. The results showed that the damage and cracking first occurred near the equipment hatch when the inner pressure was increased to 2.5 times of the design pressure, indicating that the containment entered the plastic state. When the inner pressure was increased to 2.713 times of the design pressure, the steel lining began to be teared, which indicated that the containment reached the functional failure limit state. When the inner pressure was increased to 2.857 times of the design pressure, the concrete near the equipment hatch was damaged severely, and the failure occurred because of the considerable local displacement. It was illustrated that the containment reached the structural failure limit state.

关 键 词：核安全壳 极限承载力 内压 有限元模拟 

分 类 号：TU311[建筑科学—结构工程] TM623[电气工程—电力系统及自动化]