Cyclic Behavior of Nonconforming Full-Scale RC Columns
Cyclic Behavior of Nonconforming Full-Scale RC Columns
复制标题
不合格全尺寸 RC 柱的循环行为
DOI：
10.1061/(asce)st.1943-541x.0000891
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
E. Cosenza
中科院分区：
文献类型：
--
作者：
M. Ludovico;G. Verderame;A. Prota;G. Manfredi;E. Cosenza
评估结构安全性的能力模型主要基于新建筑的典型实验结果。为了分析不符合现行抗震规范和做法的构件的变形和强度机制，对用变形钢筋或普通钢筋加固的足尺柱进行了试验研究。实验涉及8个测试单调或循环作用下的方形或矩形钢筋混凝土柱设计的规定，施工实践，和材料性能之间的20世纪40年代和70年代。实验结果允许指出的全球和局部行为的钢筋混凝土柱通常发现在现有的constructions，其中既可以发现平原和变形bars.Theoretical塑性旋转能力所提供的建议补充现行ASCE标准进行了讨论，并与实验获得的。结果表明，预测的塑性旋转相应的显着损失的横向力的能力是非常保守的，如果与实验结果相比。这在用普通钢筋加固的柱的情况下似乎特别明显。对于这些柱体，基底转动对整体变形机制的贡献是相当大的。
Capacity models to assess structural safety are primarily based on experimental outcomes typical of new constructions. In order to analyze deformation and strength mechanisms of members that do not comply to current seismic codes and practices, an experimental investigation was undertaken on full-scale columns reinforced with deformed or plain rebars. The experiments involved eight tests under monotonic or cyclic actions on square or rectangular reinforced concrete columns designed according to provisions, construction practice, and material properties enforced between the 1940s and 1970s. Experimental outcomes allowed pointing out global and local behavior of RC columns typically found in existing constructions, in which both plain and deformed bars can be found. Theoretical plastic rotation capacities provided by the proposed supplement to the current ASCE standard are discussed in this paper and compared to those experimentally obtained. The results indicate that predicted plastic rotations corresponding to significant loss of lateral-force capacity are very conservative if compared with experimental outcomes. This seems especially clear in the case of columns reinforced with plain rebars. For these columns, the contribution of the base rotation on the global deformation mechanism is considerable.