The paper shows the results of an experimental campaign aimed at investigating the cyclic behavior of a column-to-foundation joint for precast concrete elements. The tested connection is realized adopting corrugated steel ducts embedded into the foundation, in which column protruding rebars are anchored by grouting high performance mortar. The experimental program consists in testing six full-scale reinforced concrete square-section columns subject to quasi-static cyclic lateral load with a constant axial compression. A preliminary series of bond tests was carried out to define some experimental variables, i.e., longitudinal rebar diameter and anchorage length. Results of the precast joints are compared with those of two reference cast-in-place specimens with the same geometric characteristics, showing similar hysteretic behavior, energy dissipation and ductility values. Lastly, the plastic hinge height is computed for all the specimens based on experimental concrete strains, and compared to current codes formulations.

本文展示了一项旨在研究预制混凝土构件柱与地基节点的循环行为的实验活动的结果。试验连接采用波纹钢管嵌入基础实现，柱内突出钢筋通过高性能砂浆灌浆锚固。实验程序包括测试六个全尺寸钢筋混凝土方形截面柱，其承受准静态循环横向载荷和恒定轴向压力。进行了一系列初步的粘结测试，以定义一些实验变量，即纵向钢筋直径和锚固长度。将预制接头的结果与具有相同几何特征的两个参考现浇试样的结果进行比较，显示出类似的滞后行为，能量耗散和延展性值。最后，基于实验混凝土应变计算所有试样的塑性铰高度，并与当前的规范公式进行比较。