Abstract Mid-rise to tall mass timber buildings, which are constructed from engineered solid wood products, such as Laminated Veneer Lumber (LVL), Glued laminated timber (Glulam) and Cross Laminated Timber (CLT), have recently gained international popularity. As the height of timber buildings increases, so do the consequences of a progressive collapse event. While collapse mechanisms of concrete and steel buildings have been widely researched, limited studies have been carried out on mass timber buildings. This paper presents and discusses the experimental results performed on a series of 2D timber frame substructures, used in post-and-beam mass timber buildings and scaled down to fit the purpose of this research, under a middle column removal scenario. The behaviour of the frames and the ability of three types of commercially available beam-to-column connections and a proposed non-commercial novel connection, to develop catenary action under large deformations are reported. Furthermore, the system capacity in terms of the uniformly distributed pressure is also discussed. The test results showed that only the proposed connector was able to sustain the design pressure in international design specifications if no dynamic increase factor was considered, and therefore presented a potential solution to improve the robustness of post-and-beam timber buildings.

中文翻译：

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准静态拆柱情景下梁柱式大体积木框架倒塌响应试验

摘要 中高层木结构建筑，由工程实木产品建造，如层压单板木材 (LVL)、胶合层压木材 (Glulam) 和交叉层压木材 (CLT)，最近在国际上广受欢迎。随着木结构建筑高度的增加，连续倒塌事件的后果也随之增加。虽然混凝土和钢结构建筑的倒塌机制已得到广泛研究，但对大体积木结构建筑的研究却很有限。本文介绍并讨论了一系列 2D 木框架子结构的实验结果，这些子结构用于柱梁式大型木结构建筑，并按比例缩小以适应本研究的目的，在中柱拆除情况下。报告了框架的行为以及三种类型的商用梁柱连接和提议的非商业新型连接在大变形下发展悬链线作用的能力。此外，还讨论了在均匀分布压力方面的系统容量。测试结果表明，如果不考虑动态增加因素，只有提出的连接器能够承受国际设计规范中的设计压力，因此为提高梁柱木结构建筑的坚固性提供了潜在的解决方案。