钢筋混凝土柱的破坏形态及变形能力研究

对钢筋混凝土（RC）柱在地震作用下的变形性能进行量化，本文从太平洋地震研究中心柱数据库中收集到123根RC柱抗震性能试验数据，提出基于参数剪跨比和弯剪比的RC柱破坏形态判别标准；在弯曲破坏、弯剪破坏、剪切破坏三种破坏形态下，研究了轴压比、剪跨比、配箍特征值等参数对位移角的显著性影响，通过回归分析归纳出三种破坏形态下屈服位移角和极限位移角的回归方程，回归系数显著性概率均小于0.05。结果表明：本文提出的RC柱破坏形态判别标准准确度高，适应性强；位移角线性回归方程具有合理性。

Study on Failure Mode and Deformation Capacity of Reinforced Concrete Columns

In order to quantify the deformation performance and failure characteristics of RC columns under earthquake action, this paper collected 123 reinforced concrete (RC) column test data from PEER (Pacific Earthquake Research Center) database, and proposed the standard of RC column failure morphology based on parameter shear span ratio and bending-shear ratio. Under the three failure modes of bending failure, bending shear failure and shear failure, the significant effects of parameters such as axial compression ratio, shear span ratio, hoop characteristic value, volume hoop ratio, longitudinal reinforcement ratio on the displacement angle were studied. Through regression analysis, the regression equations of yield displacement angle and ultimate displacement angle under three failure modes were summarized and the significance probability of regression coefficient is less than 0.05. The results show that the criterion of RC column damage morphology proposed in this paper has high accuracy and strong adaptability; the linear regression equation of displacement angle is reasonable.