With the increased number of multi-storey buildings in seismic areas, research efforts have been focused on developing earthquake resilient systems, such as low-damage techniques based on the combination of post-tensioning and dissipating devices. This paper describes the experimental study performed on a 3-storey post-tensioned timber framed (Pres-Lam) building equipped with energy dissipating systems. The testing project consisted of three phases adopting different configurations of the experimental model: (1) post-tensioning to beam-column joints only, (2) post-tensioning and dissipative rocking mechanisms and (3) post-tensioning and dissipative braces. The main objective of this paper is to experimentally investigate on the seismic response of a large-scale specimen with dissipative braces located in high seismic area, considering construction details similar to those adopted in practical applications. During the experimental campaign, the test frame was subjected to more than one hundred ground motions considering a set of seven spectra-compatible earthquakes at increasing intensity levels. The dissipating bracing system with external replaceable hysteretic dampers improves the seismic resilience of multi-storey Pres-Lam buildings, showing inter-storey drift comparable to those with rocking walls, with full recentring capability and without structural damages or post-tensioning losses through seismic tests.

随着地震区域中多层建筑物数量的增加，研究工作已集中在开发抗震系统上，例如基于后张拉和耗散装置相结合的低破坏技术。本文介绍了在配备有耗能系统的3层后张紧木结构（Pres-Lam）建筑上进行的实验研究。测试项目包括三个阶段，分别采用不同的实验模型配置：（1）仅对梁柱节点进行后张拉；（2）后张拉和耗散的摇摆机制；（3）后张拉和耗散的支撑。本文的主要目的是通过实验研究位于高地震区的具有耗散支撑的大型标本的地震响应，考虑与实际应用中相似的构造细节。在实验过程中，考虑到一组七个强度不断增加的频谱兼容地震，测试框架经受了一百次以上的地面运动。带有外部可替换滞回阻尼器的耗散支撑系统提高了多层Pres-Lam建筑物的抗震能力，其层间漂移可与具有摇摆墙的建筑物相媲美，具有全面的支撑能力，并且不会因地震测试而造成结构损坏或后张拉力损失。