The tests described in this paper were aimed at evaluating the tensile capacity of the anchorages connecting an automated pallet warehouse with an existing RC foundation. The warehouse is a new steel structure erected in the place of a previous warehouse collapsed due to the Emilia earthquake, but whose foundation remained undamaged. The investigated fastening consists of 10 post-installed, bonded threaded rods with diameter (d) and embedment depth (h_ef) of 20 and 500 mm, respectively. Neither anchor arrangement nor embedment depth (h_ef > 20d) was covered by current standards for fastening design. To reproduce the in-situ actual conditions of the fastening, an unconfined test configuration was used. The maximum loads achieved were more than 3 times greater than the seismic demand for the fastening. The tests highlighted the crucial role played by the reinforcing steel which was present in the foundation. Concrete-related failure mechanisms, such as the combined pullout and concrete cone failure mechanism typical of bonded anchors, were not activated. The observed crack patterns rather suggest the onset of a flexural failure mechanism of the concrete slab. This feature is confirmed by analytical calculations showing that, at the maximum loads achieved in the tests, the top reinforcement was likely to be yielded. In six preliminary unconfined tension tests on single anchors, steel rod failure was achieved, associated with limited cracking of the concrete surface in proximity of the anchor.

本文所述的测试旨在评估连接自动托盘仓库和现有RC基础的锚固的抗拉能力。该仓库是一个新的钢结构，取代了先前因艾米利亚地震而倒塌的仓库，但其地基未受到损坏。研究的紧固件包括10个安装后的粘结螺杆，其直径（d）和埋深（h _ef）分别为20和500 mm。当前的紧固设计标准都没有涵盖锚的布置和埋入深度（h _ef  > 20 d）。重现原位紧固的实际条件，使用无限制的测试配置。所达到的最大载荷比紧固件的抗震要求高出三倍以上。测试突出了基础中存在的钢筋所起的关键作用。未激活与混凝土有关的破坏机制，例如结合锚典型的拉拔和混凝土圆锥体破坏机制。观察到的裂纹模式反而暗示了混凝土板弯曲破坏机理的开始。通过分析计算证实了此功能，该分析计算表明，在测试中达到的最大载荷下，很可能会屈服顶部钢筋。在针对单个锚的六个初步无边限拉力测试中，钢杆失效，