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Limit analysis and strain-softening structures

机译:极限分析和应变软化结构

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摘要

Two simple approaches for investigating the behaviour of strain-softening structures are examined. The first is based on a modified form of the upper bound theorem of limit analysis: whilst the method proves unsuccessful, the theorem being disproved by counter example, useful insight is provided into the behaviour of strain-softening structures. The second approach, which is based on the Galerkin method, is ideally suited to investigating the behaviour of structures which, whilst exhibiting some ductility, do not have sufficient ductility for limit analysis to be applied without concerns for its validity. The equivalence of the latter approach and the standard upper bound theorem, when applied to perfectly plastic structures, is illustrated and examples of its application are presented. (C) 1999 Elsevier Science Ltd. All rights reserved. [References: 9]
机译:研究了两种研究应变软化结构行为的简单方法。第一种是基于极限分析上限定理的一种修改形式:虽然该方法证明不成功,但通过反例证明了该定理,但对应变软化结构的行为提供了有用的见识。第二种方法基于Galerkin方法,非常适合研究结构的行为,这些结构虽然表现出一定的延展性,但没有足够的延展性以进行极限分析而无需考虑其有效性。举例说明了后一种方法和标准上限定理在应用于完全塑性结构时的等效性,并给出了其应用实例。 (C)1999 Elsevier ScienceLtd。保留所有权利。 [参考:9]

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