Capacity Assessment of Existing RC Columns
Capacity Assessment of Existing RC Columns
复制标题
现有钢筋混凝土柱的容量评估
DOI：
10.3390/buildings11040161
复制
发表时间：
2021
期刊：
影响因子：
3.8
通讯作者：
B. Belletti
中科院分区：
文献类型：
--
作者：
Francesca Vecchi;B. Belletti
现有钢筋混凝土（RC）构件按照过时的规范设计，往往具有高箍筋间距的特点。高箍筋间距产生的坍塌机制通常与纵向钢筋的屈曲有关，并且在发生腐蚀时可能会加剧。本文将钢筋的非弹性屈曲和钢筋的腐蚀等钢筋的新细化材料本构规律应用于适用于循环荷载下钢筋混凝土构件的固定裂纹模型PARC_CL 2.1裂纹模型中。通过与现有实验数据和分析预测结果的比较，验证了该模型的有效性。最后，将该模型用于校正校正系数，以应用于当前规范的制定中，用于预测钢筋腐蚀和屈曲情况下的非协调构件的极限转动能力。
Existing reinforced concrete (RC) members, designed in accordance with obsolete codes, are often characterized by high stirrup spacing. The collapse mechanisms generated by high stirrup spacing are typically related to the buckling of longitudinal reinforcement and can be accentuated when corrosion takes place. In this paper, new refined material constitutive laws for steel, including inelastic buckling and corrosion of reinforcement, are implemented in a fixed crack model suitable for RC elements subjected to cyclic loadings called the PARC_CL 2.1 crack model. The effectiveness of the proposed model is validated through comparison with available experimental data and analytical predictions. Finally, the proposed model is used to calibrate correction coefficients to be applied to current codes formulation for the ultimate rotational capacity prediction of non-conforming elements subjected to buckling phenomena and characterized by corrosion of reinforcing bars.