地震作用下钢筋混凝土柱变形与损伤研究

为量化地震作用下钢筋混凝土（RC）柱损伤情况和变形，并将不同地震破坏状态下RC柱损伤和变形进行分析。从太平洋地震工程研究中心（PEER）数据库中收集91组RC柱抗震试验数据，选取4种广泛应用的构件损伤模型进行计算，将损伤发展曲线与层间位移角发展曲线进行对比分析。对RC柱损伤指标限值进行归一化处理，统计分析后得到不同破坏等级下的位移角限值，并给出了RC柱各破坏等级下的位移角限值与损伤指标限值对应关系。研究结果表明，牛荻涛损伤模型可更准确地评价地震作用下结构构件损伤程度，且与层间位移角发展曲线均呈近似线性增长趋势；不同破坏等级下的位移角限值验算保证率均＞80%，表明本文提出的位移角限值具有一定合理性。

Study on Deformation and Damage of Reinforced Concrete Columns under the Earthquake

To quantify the damage and deformation of reinforced concrete (RC) columns under the earthquake, and analyze the damage and deformation of RC columns under different seismic damage states, 91 sets of RC column seismic test data were collected from the Pacific Earthquake Engineering Research Center (PEER) database. Four widely used component damage models were selected for calculation, and the damage development curves were compared with the inter-story displacement angle development curves for analysis. The damage index limits of RC columns were normalized, the displacement angle limits under different damage levels were obtained after statistical analysis, and the correspondence between the displacement angle limits and damage index limits under each damage level of RC columns was given. The results show that the Niu Ditao damage model can more accurately evaluate the damage degree of structural members under the earthquake, and all the development curves with the inter-story displacement angle behave an approximately linear growth trend. The guaranteed rate of the displacement angle limits under different damage levels is greater than 80%, indicating that the displacement angle limits proposed in this paper are reasonable.