基于能量-变形准则的钢筋混凝土柱地震损伤概率性能水准研究

Probabilistic seismic damage performance level study on RC columns based on energy-deformation criteria

为了正确评估钢筋混凝土(RC)柱构件损伤破坏程度,建立RC柱合理的损伤性能水准。首先依据钢筋混凝土柱的破坏全过程,定义出5个性能水准。其次,基于大量的方柱和圆柱的试验结果,利用Park-Ang损伤模型计算上述两类截面RC柱各性能点的损伤值。采用概率统计分析方法,计算得到每个性能点处具有95%保证率的损伤上限值,以此作为损伤性能水准的临界损伤值。最终,由此建立了RC柱的损伤性能水准。

It is very important to assess the damage level of RC columns accurately and to establish the seismic damage performance level. In this paper,according to the whole damage process of RC columns,five performance levels were defined.On the basis of the available test results of RC columns,the damage values of each performance level were calculated for RC columns with rectangular and circular cross sections,respectively. Based on the probability statistics analysis method,the confidence upper limit damage value with 95% probability for each performance level was taken as the critical damage value,which was a reasonable indicator to assess the seismic performance for RC columns. Finally,the seismic damage performance level of RC columns was established.