组合截面柱考虑损伤的弹塑性循环性能分析

Elasto-plastic cyclic analyses of welded columns with damage

提出了结构钢弹塑性各向异性损伤本构模型 ,并采用 U.L .格式的壳体大挠度双重非线性有限元方法 ,对箱型组合截面柱进行单轴循环荷载作用下的非线性分析 .通过与试验结果对比 ,论证了方法的正确性 ,为深入进行钢结构地震反应分析奠定了基础 .

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 model can reflects the real work characters of the constructional steel under the cyclic loads and is suitable for the elasto plastic analyses of the steel structures under the earthquake;and the double nonlinearity FEM of U.L. mode is adopted to analyze the welded columns under the cyclic unaxial force.