多层钢筋混凝土框架结构基于材料的损伤模型研究

Material-based damage model research on multilayer RC frame structures

基于线性损伤理论,在确立混凝土和钢筋材料的损伤指标计算模型的基础上,通过引入加权系数,实现了从材料到钢筋混凝土构件截面、构件、楼层及框架结构损伤指标的计算;并按我国现行规范设计了一个位于抗震设防烈度为8度区的5层钢筋混凝土框架结构;采用Open Sees软件按上述基于材料的钢筋混凝土整体结构的损伤评估方法对其进行了增量动力分析及损伤评估。计算结果表明:采用基于材料的损伤模型计算方法,不仅能够很好地预测多层钢筋混凝土框架结构在地震作用下的损伤发展过程,还能很好地评估多层钢筋混凝土框架结构在地震作用下的损伤状态。

The damage models of steel and concrete were set up based on the linear damage theory and the damage values of reinforced concrete （RC） cross section, member, story and the whole structure were calculated respectively via the damage index of the material by introducing the weighted coefficient. Then a five-story RC frame structure with seismic fortification intensity of 8 degree was designed according to current codes. The incremental dynamic analysis and damage evaluation of the structure were carried out according to the above material-based damage evaluation method for RC integral structure by OpenSees software. The results indicate that the damage model method based on materials can predict damage developing process of multilayer RC frame structure and evaluate the damage state of the multilayer RC frame structure under the earthquake effectively.