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Risk analysis of industrial structures under extreme transient loads

机译：极端瞬态载荷下的工业结构风险分析

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摘要

A modular analysis package is assembled for assessing risk in typical industrial structural units such as steel storage tanks, due to extreme transient loads that are produced either as a result of chemical explosions in the form of atmospheric blasts or because of seismic activity in the form of ground motions. The main components of the methodology developed for this purpose are as follows: (ⅰ) description of blast overpressure and ground seismicity, (ⅱ) transient non-linear finite element analysis of the industrial structure, (ⅲ) development of 3D-equivalent, continuous beam multi-degree-of-freedom structural models, (ⅳ) introduction of soil-structure interaction effects, (ⅴ) probabilistic description of the loading process and the stiffness/mass characteristics of the structure, and (ⅵ) generation of fragility curves for estimation of structural damage levels by using the Latin hypercube statistical sampling method. These fragility curves can then be used within the context of the engineering analysis-design cycle, so as to minimize structural failure probability under both man-made hazards such as blasts and natural hazards such as earthquake-induced transient loads.
机译：组装了一个模块化分析工具包，用于评估典型的工业结构单元（例如钢制储罐）中的风险，这是由于以大气爆炸形式发生的化学爆炸或以地震形式发生的地震活动而产生的极端瞬态载荷地面运动。为此目的开发的方法的主要组成部分如下：（ⅰ）爆炸超压和地面地震活动的描述，（ⅱ）工业结构的瞬态非线性有限元分析，（ⅲ）等效于3D的连续开发梁多自由度结构模型，（ⅳ）引入土-结构相互作用效应，（ⅴ）概率描述加载过程和结构的刚度/质量特征，以及（ⅵ）生成脆性曲线使用拉丁文超立方体统计抽样方法估算结构破坏程度。然后，可以在工程分析-设计周期的背景下使用这些易碎性曲线，以便在人为危险（例如爆炸）和自然灾害（例如地震引起的瞬时载荷）下最小化结构破坏的可能性。

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