考虑损伤累积效应的钢框架结构抗震分析与设计

为了在强震分析中考虑钢材损伤累积效应的影响，应用塑性应变和能量损耗理论建立了钢材的损伤模型，对一个9层Benchmark结构进行考虑损伤累积效应的地震分析．通过对比分析，表明考虑材料损伤累积效应因素后，结构塑性阶段的动力反应变大，损伤指标增加，损伤程度提高1个等级．针对结构在强震中考虑损伤累积效应的反应特征，通过布置斜撑对薄弱层进行了加强，使首层的动力响应和损伤程度均大大减小，上层的损伤指标虽有所增加但损伤状态变化不大．

Seismic Analysis and Design for Steel Frame Structure Considering Damage Accumulation Effects

To consider damage accumulation effects during the strong seismic analysis, a damage model for steel material was developed on the basis of plastic strain and energy dissipation theory. A seismic analysis of a 9-story benchmark model structure was conducted considering damage accumulation effects. Results of comparative analysis indicate that the dynamic responses of structure during plastic period and damage index increase, and the damage extent increases by one grade after considering the damage accumulation effects. According to the response character- istics of structure under strong earthquakes, the weak story is strengthened by adding braces. The dynamic responses and damage extent of the first story are greatly reduced, and the damage state of the upper structure changes a little.