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Seismic drift demands in multi-storey cross-laminated timber buildings

机译：多层交叉层压木建筑中的地震漂移需求

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摘要

This paper investigates the seismic response of multi-storey cross-laminated timber (CLT) buildings and its relationship with salient ground-motion and building characteristics. Attention is given to the effects of earthquake frequency content on the inelastic deformation demands of platform CLT walled structures. The response of a set of 60 CLT buildings of varying number of storeys and panel fragmentation levels representative of a wide range of structural configurations subjected to 1656 real earthquake records is examined. It is shown that, besides salient structural parameters like panel aspect ratio, design behaviour factor, and density of joints, the frequency content of the earthquake action as characterized by its mean period has a paramount importance on the level of nonlinear deformations attained by CLT structures. Moreover, the evolution of drifts as a function of building to ground-motion periods ratio is different for low- and high-rise buildings. Accordingly, nonlinear regression models are developed for estimating the global and interstorey drifts demands on multi-storey CLT buildings. Finally, the significance of the results is highlighted with reference to European seismic design procedures and recent assessment proposals.
机译：本文研究了多层交叉层压木材（CLT）建筑物的地震反应及其与显着地震动和建筑物特征的关系。注意地震频率含量对平台CLT墙结构非弹性变形需求的影响。检查了60层CLT建筑物的响应，这些建筑物的层数和面板碎片级别各不相同，代表了经受1656次真实地震记录的各种结构配置。结果表明，除了显着的结构参数（如面板长宽比，设计行为因子和节理密度）外，以平均周期为特征的地震作用的频率含量对于CLT结构获得的非线性变形水平也至关重要。 。此外，对于低层和高层建筑物，漂移随建筑物与地面运动周期之比的变化是不同的。因此，开发了非线性回归模型来估计多层CLT建筑物的整体和层间漂移需求。最后，参考欧洲抗震设计程序和最新评估建议，突出了结果的意义。

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