论文部分内容阅读
液化天然气(LNG)作为一种清洁能源,目前在我国能源结构中的比例越来越大。作为LNG接收站的核心部分,LNG储罐的建造技术一直是一个难题。施工中发现不同的预应力施工方案对外罐墙体混凝土拉应力的大小有较大影响。本文借助于ANSYS有限元软件,对LNG预应力混凝土外罐墙体不同预应力施工方案的内力分布进行了研究计算,发现是否施加预应力及不同预应力施工方案均对预应力储罐结构的应力分布有很大的影响。然后,优化提出了一种最合理的预应力施工方案,解决了预应力混凝土外罐墙体预应力施工中应力过大的问题,有效地控制了外罐墙体混凝土裂缝的产生。
As a clean energy, liquefied natural gas (LNG) is now an increasing proportion of China’s energy mix. As a core LNG receiving station, LNG storage tank construction technology has been a problem. Construction found that different prestressed construction program on the external tank wall concrete tensile stress has a greater impact on the size. In this paper, with the help of ANSYS finite element software, the internal force distribution of different prestressed concrete LNG prestressed concrete cans walls is studied and calculated. It is found that whether the prestressed and prestressed construction schemes are applied to prestressed tank structures Distribution has a great impact. Then, a most reasonable prestressed construction scheme is put forward, which solves the problem of excessive stress in the prestressed concrete external wall construction and effectively controls the concrete crack in the external wall.