CAJ | 학술논문

核电厂LOCA发生后，预应力混凝土安全壳结构内温度场分布具有明显的非线性特征，但现行的混凝土安全壳设计规范未对LOCA下温度和应力的组合作用提出具体的计算方法。基于用ANSYS程序建立的包含预应力钢束的混凝土安全壳结构的有限元模型，本文计算了LOCA下不同时刻安全壳壳壁内的温度场分布，并与理论值进行了比较，验证了计算模型的正确性。初步分析了高温、高压作用下安全壳结构变形的规律，总结了混凝土温度效应和预应力系统的作用，可为安全壳结构设计提供参考。
핵전엄LOCA발생후，예응력혼응토안전각결구내온도장분포구유명현적비선성특정，단현행적혼응토안전각설계규범미대LOCA하온도화응력적조합작용제출구체적계산방법。기우용ANSYS정서건립적포함예응력강속적혼응토안전각결구적유한원모형，본문계산료LOCA하불동시각안전각각벽내적온도장분포，병여이론치진행료비교，험증료계산모형적정학성。초보분석료고온、고압작용하안전각결구변형적규률，총결료혼응토온도효응화예응력계통적작용，가위안전각결구설계제공삼고。
After loss of coolant accident (LOCA ) occurs in nuclear power plant ,the temperature field distribution in prestressed concrete containment (PCC ) is nonlinear significantly . However , the detailed calculation method combining temperature and pressure is not proposed in current PCC design code in China .In this paper ,the finite element model for PCC including prestressed tendons was built by using ANSYS code and the temperature field under LOCA was calculated . The calculation results were compared with the theoretical results ,and the accuracy of the proposed model was veri‐fied .The response law of PCC under high pressure and high temperature was prelimina‐rily analysed ,and the effects of temperature and prestressed tendons on PCC were con‐cluded ,w hich can provide reference to the concrete containment design .