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首页> 外文期刊>International journal of structural stability and dynamics >INFLUENCE OF STRAIN HARDENING ON THE BEHAVIOR AND DESIGN OF STEEL STRUCTURES
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INFLUENCE OF STRAIN HARDENING ON THE BEHAVIOR AND DESIGN OF STEEL STRUCTURES

机译：应变硬化对钢结构性能及设计的影响

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摘要

The present generation of international structural steel design codes treats material nonlinearity through simplified elastic-plastic or rigid-plastic material models. However, the actual stress-strain response of structural steel is more complex than this and features, in particular, strain hardening. Strain hardening refers to the increase in strength beyond yield because of plastic deformation. The influence of strain hardening on the behavior and design of steel structures is examined in this study through both the experimentation and the analysis of existing data, and a method to exploit the additional capacity that arises is outlined. Both determinate and indeterminate structures are considered. The proposed design method, referred to as the continuous strength method (CSM), is a deformation-based design approach employing a continuous relationship between cross-sectional slenderness and cross-sectional deformation capacity, together with a material model that allows for strain hardening. Comparisons are made between test results generated as part of the present study and collected from existing studies, and the predictions from the CSM and Eurocode 3 (EC3). For all cases considered, the CSM, through a rational exploitation of strain hardening, offers a more accurate prediction of observed physical behavior.
机译：当前的国际结构钢设计规范通过简化的弹塑性或刚性塑性材料模型来处理材料非线性。但是，结构钢的实际应力-应变响应要比此复杂得多，并且具有应变硬化的特征。应变硬化是指由于塑性变形而使强度超出屈服而增加。通过实验和现有数据分析，研究了应变硬化对钢结构行为和设计的影响，并概述了一种利用所产生的附加能力的方法。确定和不确定的结构都被考虑。所提出的设计方法，称为连续强度方法（CSM），是一种基于变形的设计方法，该方法采用了横截面细长度和横截面变形能力之间的连续关系以及允许应变硬化的材料模型。将本研究的一部分生成的测试结果和从现有研究中收集的测试结果与CSM和Eurocode 3（EC3）的预测进行比较。对于所有考虑的情况，CSM通过合理利用应变硬化来提供对观察到的物理行为的更准确的预测。

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