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首页> 外文期刊>Bulletin of earthquake engineering >Definition of seismic performances and fragility curves of unanchored cylindrical steel legged tanks used in wine making and storage
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Definition of seismic performances and fragility curves of unanchored cylindrical steel legged tanks used in wine making and storage

机译：葡萄酒制造和储存中未定向圆柱钢腿罐的地震性能和脆弱曲线的定义

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摘要

The introduction of stainless-steel legged tanks is rather recent, and their use increased in the last decades in exponential way, especially in food industry and agricultural applications since they proved to be simple to prefabricate and transport, easy to clean and chemically inert. Despite their worldwide diffusion also in high seismicity areas, most of them were not designed with earthquake-based criteria as emerged by the catastrophic consequences and heavy losses observed, even recently, after several major earthquakes. By means of incremental dynamic analyses on the finite element models of 140 winemaking and storage legged tanks, the present paper, evaluates the main features of the dynamic response and for each vessel provides the lognormal cumulative fragility functions, for three different limit states of each vessel. Then, for each limit state, by means of nonlinear regression analyses, the median and the dispersion parameters of the best fitting lognormal function of every tank were statistically elaborated in order to define the response surfaces of the parameters. The response surfaces, provided for 3-, 4- and 5-leg unanchored tanks, are defined on the basis of few geometrical tank data. The analytical expressions provided in the paper, represent a practical and useful tool to directly calculate the fragilities of legged vessel. These, obviously, will allow the fast assessment of the seismic vulnerability of the tanks in agricultural facilities located in seismic prone areas.
机译：不锈钢腿罐的引入是最近的，它们的使用在过去几十年中，尤其是食品工业和农业应用，因为他们被证明是预制和运输，易于清洁和化学上的惰性。尽管在高地震性地区也存在世界范围的扩散，但大多数都没有设计基于地震的标准，这是由于灾难性后果而出现的灾难性后果，甚至在几个主要地震之后甚至最近观察到的重损失。通过增量动态分析140酿酒和存储腿罐的有限元模型，本文评估动态响应的主要特征，并且对于每个船只提供了每个船只的三个不同极限状态的算法累积脆弱功能。然后，对于每个限制状态，通过非线性回归分析，统计地阐述每个罐的最佳拟合伐木函数的中值和分散参数，以便定义参数的响应表面。为3-，4-和5腿未定向罐提供的响应表面是根据几何罐数据定义的。本文中提供的分析表达式，代表了直接计算腿血管磁体的磁带的实用和有用的工具。显然，这些，将允许快速评估位于地震俯卧区的农业设施中坦克的地震脆弱性。

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