ABSTRACT

This paper experimentally investigates the seismic performance of an innovative ‘rocking’ precast concrete cladding panel system. Quasi-static cyclic loading tests were conducted on a sub-assembly of three ‘rocking’ panel pairs attached to a 3D steel structure, with and without sealant in the vertical joints between adjacent panels. The sub-assembly included a flat panel pair, an L-shaped panel pair and an oblique corner panel pair. Although the loading was applied in a single direction, the alignments of the panel pairs allowed scrutinizing their in-plane, out-of-plane and bi-directional performances.

The test results validated the low-damage attributes of the novel cladding system, which was able to accommodate large cyclic drifts with minor physical damage to the panels and their connections with the structures. Up to a cyclic drift of 4.0%, the only forms of damage observed were tearing of the sealants in between the panel pairs, dislocation of backer rods behind some sealants, dislodgement of a grout piece, and loosening of a nut supporting a corner panel. All these forms of damage are minor and repairable, which can be avoided by making some minor changes to the details of the system.

摘要

本文通过实验研究了一种创新的“摇摆”预制混凝土覆面板系统的抗震性能。在连接到 3D 钢结构的三个“摇摆”面板对的子组件上进行了准静态循环加载测试，在相邻面板之间的垂直接缝中使用和不使用密封剂。子组件包括一对平板面板、一对 L 形面板和一对斜角面板。尽管载荷是在一个方向上施加的，但面板对的对齐方式允许仔细检查它们的平面内、平面外和双向性能。

测试结果验证了新型覆层系统的低损伤属性，该系统能够适应较大的循环漂移，对面板及其与结构的连接造成轻微的物理损坏。高达 4.0% 的循环漂移，观察到的唯一损坏形式是面板对之间的密封剂撕裂、一些密封剂后面的支撑杆错位、灌浆件移位以及支撑角面板的螺母松动。所有这些形式的损坏都是轻微的并且可以修复的，可以通过对系统的细节进行一些小的更改来避免。