Abstract

Based on the experimental estimation of the key dynamic properties of a seven-storey building made entirely of cross-laminated timber (CLT) panels, the finite element (FE) model updating was performed. The dynamic properties were obtained from an input-output full-scale modal testing of the building in operation. The chosen parameters for the FE model updating allowed the consideration of the timber connections in a smeared sense. This approach led to an excellent match between the first six experimental and numerical modes of vibrations, despite spatial aliasing. Moreover, it allowed, together with the sensitivity analysis, to estimate the stiffness (affected by the connections) of the building structural elements. Thus, the study provides an insight into the as-built stiffness and modal properties of tall CLT building. This is valuable because of the currently limited knowledge about the dynamics of tall timber buildings under service loadings, especially because their design is predominantly governed by the wind-generated vibrations.

摘要

基于对完全由交叉层压木材 (CLT) 面板制成的七层建筑的关键动态特性的实验估计，执行了有限元 (FE) 模型更新。动态特性是从运行中的建筑物的输入输出全尺寸模态测试中获得的。为 FE 模型更新选择的参数允许在涂抹的意义上考虑木材连接。尽管存在空间混叠，但这种方法导致前六种实验和数值振动模式之间的完美匹配。此外，它还允许与敏感性分析一起估计建筑结构元件的刚度（受连接影响）。因此，该研究提供了对高层 CLT 建筑物的竣工刚度和模态特性的深入了解。