【摘要】 介绍了预应力钢筋混凝土液化天然气(LNG)储罐在内罐泄漏工况下外罐承受的内压、LNG液体压力、预应力荷载、结构及附属材料重力荷载和温度作用,阐述了笔者创建的外罐罐壁液密性分析的有限元模型、采用的计算方法和计算结果提取方法。说明了在内罐泄漏工况下,内压、LNG液体压力和罐内侧低温作用为外罐罐壁液密性的主要影响因素。并提出了合理设置预应力钢绞线、内侧低温钢筋以及采用适当线膨胀系数的混凝土可保证外罐罐壁液密性。更多还原

【Abstract】 This paper describes the loads and thermal actions on the outer tank of prestressed concrete LNG storage tank due to the leakage of inner tank,introduces the finite element model established for analyzing the liquid tightness of outer tank,the computing method and the method for extraction of calculation results,and analyzes the factors influencing the liquid tightness of outer tank and the measures taken in case of the leakage of inner tank.更多还原