弯曲破坏钢筋混凝土柱的变形性能研究

Study on deformation performance of flexural damage in reinforced concrete columns

钢筋混凝土柱是钢筋混凝土结构的主要承载构件,研究钢筋混凝土柱的破坏形式与破坏过程对最终掌握结构整体的破坏过程和倒塌机理十分重要。本文通过对美国太平洋地震研究中心钢筋混凝土柱数据库中的97根弯曲破坏且有最终破坏实验记录的钢筋混凝土柱进行了统计,分析了钢筋混凝土柱的变形性能,以及影响其变形性能的主要因素;应用ADINA的弯矩-曲率梁单元对其进行有限元数值模拟,并与实验结果进行比较,认为三折线弯矩-曲率简化模型对钢筋混凝土柱变形性能的分析结果较为精确,适用于构件变形性能评价,其分析方法简单,适合设计人员应用。

Reinforced concrete （RC） column is the main bearing component of RC structure, and researches on the damage form and destruction process of RC column are of great importance to finally understand the failure process and the collapse mechanism of the whole RC structure. Based on the statistical analysis of the database of the Pacific Earthquake Engineering Research Center （PEER） which containing the results of ninety seven flexural destroyed RC columns, this article analyzes the deformation behavior of RC column, and the main factor affecting the deformation properties. By means of FENS （finite element numerical simulation） and AD1NA we simulate the RC columns and compare it with the experimental results. It is considered that the three fold moment-curvature simplified model would give a more accurate result of the deformation properties. The analysis method is simple and easy for designers to grasp.