结构钢损伤本构关系的研究

回顾了结构钢损伤模型的发展史，提出了一种新的本构模型－结构钢弹塑性各向异性损伤本构模型，该模型采用混合强化准则，考虑Bauschinger效应，屈服平台、硬化（软化）效应及损伤和损伤演化影响。算例分析结果表明本文模型能够客观地反映结构钢在循环荷载作用下的工作性能、适用于进行钢结构及构件在循环荷载作用下弹塑性反应分析。

Research on constructional steel damage constitutive relations

It's one of the five basic researches to damage mechanics to build up the objective constitutive relations of the steel for the elasto plastic analyses of the steel structures under the action of the earthquake. A new kind of constitutive model--the elasto plastic anisotropic damage model of the constructional steel is put forward, which includes the mixed hardening criterion, Bauschinger effect, yield plateau, hardening (softening) influence, damage and damage evolution. The results of the calculation on the thick Aluminum ring compared with ones of the tests show that the model can reflects the real work characteristics of the constructional steel under the cyclic loads. The constitutive relation of the steel set forth here is suitable for the elasto plastic analyses of the steel structures under the earthquake, also for the further research on the destruction mechanism of the steel structures under the earthquake.