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首页> 外文期刊>Bulletin of earthquake engineering >Seismic vulnerability mitigation of liquefied gas tanks using concave sliding bearings
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Seismic vulnerability mitigation of liquefied gas tanks using concave sliding bearings

机译：使用凹形滑动轴承减轻液化气罐的地震易损性

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摘要

The aim of this paper is to evaluate the effectiveness of a concave sliding bearing system for the seismic protection of liquefied gas storage tanks through a seismic fragility analysis. An emblematic case study of elevated steel storage tanks, which collapsed during the 1999 A degrees zmit earthquake at Habas Pharmaceutics plant in Turkey, is studied. Firstly, a fragility analysis is conducted for the examined tank based on a lumped-mass stick model, where the nonlinear shear behaviour of support columns is taken into account by using a phenomenological model. Fragility curves in terms of an efficient intensity measure for different failure modes of structural components demonstrate the inevitable collapse of the tank mainly due to insufficient shear strength of the support columns. A seismic isolation system based on concave sliding bearings, which has been demonstrated a superior solution to seismically protect elevated tanks, is then designed and introduced into the numerical model, accounting for its non-linear behaviour. Finally, a vulnerability analysis for the isolated tank is performed, which proves a high effectiveness of the isolation system in reducing the probability of failure within an expected range of earthquake intensity levels.
机译：本文的目的是通过地震脆性分析评估凹面滑动轴承系统对液化气储罐的地震防护的有效性。研究了一个高架钢制储罐的标志性案例研究，该储罐在土耳其哈巴斯制药厂的1999年阿兹米特地震中倒塌。首先，基于集总质量模型对被检查的储罐进行了脆性分析，其中，使用现象学模型考虑了支撑柱的非线性剪切行为。就结构构件的不同破坏模式而言，以有效强度度量的脆弱性曲线表明，罐的不可避免的倒塌主要是由于支撑柱的抗剪强度不足所致。然后，设计了基于凹面滑动轴承的隔震系统，该系统已被证明是对高架储罐进行地震保护的一种出色解决方案，然后考虑了其非线性行为，将其引入数值模型。最后，对隔离储罐进行了脆弱性分析，证明了隔离系统在降低地震烈度水平的预期范围内发生故障的可能性方面具有很高的有效性。

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