考虑损伤发展和损伤累积效应的结构受力特性分析计算,对于更精确地研究和预测结构强震灾变行为,有着十分重要的意义.基于热力学损伤演变理论,推导了适合于铁木辛柯梁单元的损伤演变方程和相应的本构,并开发了相应的考虑损伤累积效应的数值分析方法.通过和梁试件试验结果数据的对照以及现有材料模型的数值计算比较,表明该模型在构件滞回仿真数值计算方面可以实现更准确的模拟.
Mechanics analysis considering the cumulative effects of damage evolution is significant to more accurate research and forecast of dynamical mechanism of structures during a strong earthquake.Based on thermodynamic theory on damage evolution,the damage evolution equation suitable for Timoshenko beam element and the corresponding constitutive relationship is deduced,and the corresponding numerical analysis method developed.The comparison between data collected in a beam specimen test and that from numerical simulation based on existing material model shows that the numerical analysis method can achieve better accuracy in hyseresis test emulation research.