16万m~3全混凝土LNG储罐结构受力分析

发布时间：2018-07-04 17:02

本文选题：全混凝土LNG储罐 + 混凝土低温本构　；参考：《天津大学》2014年硕士论文

【摘要】：世界能源紧张已是不争的事实,清洁能源天然气将会是未来能源应用的方向。LNG储罐是天然气产业链的“陆上起点,海上终点”,在LNG的发展中充当重要角色。当前LNG储罐的主要材料为混凝土(外罐)与9%镍钢(内罐),随之引来的问题是：①9%镍钢材料昂贵,多为进口,我国也是近两年才有其生产能力；②9%镍钢的施工复杂；③LNG储罐的设计技术还主要掌控在国外的一些设计单位,设计市场有偏垄断的倾向。更有优势的全混凝土LNG储罐在我国还没有展开研究,在国外也是寥寥无几。对全混凝土LNG储罐的研究不仅能促进LNG储罐形式的多样化,还可以为其他类似大型低温储罐(低温液氧、液氮)的分析提供理论支持。为了开展我国的全混凝土LNG储罐研究工作,丰富LNG储罐的设计建造市场,本文主要进行以下工作：1.收集国内外关于全混凝土LNG储罐的研究文献,以及超低温环境下混凝土的应用文献,分析全混凝土LNG储罐研究的可行性；2.按照常规的16万m3全容罐尺寸并结合相关文献拟定全混凝土LNG储罐的尺寸；3.对全混凝土LNG储罐进行温度场分析,以确定混凝土内罐的温度分布状态,继而确定所需的混凝土本构关系；4.确定全混凝土LNG储罐所采用的材料及所受荷载；5.对全混凝土LNG储罐进行自重、预应力、液压作用下的力学性能分析,提取内外罐罐壁与底板的内力,首先对内罐的内力趋势进行分析,其次对外罐的内力与普通全容罐的内力进行差异对比;6.对全混凝土LNG储罐进行一至四类场地下的地震时程分析,主要确定这种新型储罐在不同场地下的结构响应及差异。
[Abstract]:It is an indisputable fact that the energy shortage in the world. The clean energy natural gas will be the direction of energy application in the future. LNG storage tank is the "onshore starting point, offshore terminal point" of the natural gas industry chain, and plays an important role in the LNG development. At present, the main materials of LNG storage tank are concrete (external tank) and 9% nickel steel (inner tank). The following problems are that: 1 19% nickel steel is expensive, most of which are imported, and the construction of 29% nickel steel with production capacity in our country is complex in recent two years. The design technology of LNG storage tank is mainly controlled in some foreign design units, and the design market tends to be monopolized. More advantages of full-concrete LNG storage tank in China has not been carried out, in foreign countries are very few. The research on the whole concrete LNG storage tank can not only promote the diversification of LNG storage tank, but also provide theoretical support for the analysis of other large-scale cryogenic storage tanks (low temperature liquid oxygen, liquid nitrogen). In order to carry out the research work of the whole concrete LNG storage tank in China and enrich the design and construction market of the LNG storage tank, this paper mainly carries out the following work: 1. This paper collected the domestic and foreign literatures about the whole concrete LNG storage tank and the application literature of the concrete in the ultra-low temperature environment, and analyzed the feasibility of the research on the whole concrete LNG storage tank. According to the size of the conventional 160000 m ~ 3 full storage tank and combined with related literature, the size of the whole concrete storage tank is calculated. The temperature field of the whole concrete LNG storage tank is analyzed to determine the temperature distribution of the concrete tank, and then the constitutive relation of concrete is determined. Determine the material used and the load to be applied to the whole concrete LNG storage tank. The mechanical properties of the whole concrete LNG storage tank under the action of deadweight, prestress and hydraulic pressure are analyzed, and the internal force between the inner and outer tank wall and the bottom plate is extracted. Firstly, the internal force trend of the inner tank is analyzed. Secondly, the internal force of external tank is compared with that of general full tank. The seismic time history analysis of one to four types of underground concrete LNG storage tanks is carried out to determine the structural responses and differences of the new type storage tanks in different fields.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU37;TE972

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