Experimental investigation on damage-induced changes in modal parameters of cross-laminated timber panels

IF 2.7 3区农林科学 Q1 FORESTRY

European Journal of Wood and Wood Products Pub Date : 2026-08-17 DOI:10.1007/s00107-026-02469-3

Ahmet Can Altunışık, Hasan Öztürk, Fezayil Sunca, Fatih Yesevi Okur, Algıhan Kaşif Karahasan, Aydın Demir, Okan İlhan, Abdullah Uğur Birinci, Nadir Ayrilmis, Cenk Demirkır

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Abstract

The changes in the modal parameters of cross-laminated timber (CLT) panels exposed to damage were experimentally investigated in this study. For this purpose, 30 three-layer CLT panels were produced considering different configurations in terms of wood species, material properties, and layer arrangements. Monotonic lateral loading tests were performed to simulate the effects of lateral forces, typically induced by seismic actions. The modal parameters of the CLT panels in both the undamaged and damaged states were obtained through ambient vibration tests conducted before and after the monotonic loading tests. The Enhanced Frequency Domain Decomposition (EFDD) method was used to identify the modal parameters of specimens. The monotonic loading and ambient vibration tests revealed that structural damage considerably affected the modal parameters of the CLT panels, leading to a reduction in stiffness, and alterations in their dynamic behavior. After damage, the natural frequencies of the CLT panels decreased significantly, with maximum reductions of 67.29% in the first mode and 35.98% in the second mode. Spruce panels generally exhibited more consistent responses, whereas larger variations in vibrational response were observed for Alder and Hybrid panels. The results not only emphasized the importance of selecting appropriate wood species and layer configurations for CLT panels, but also showed that mechanical connection behavior could significantly influence the structural response.

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交叉层合板模态参数损伤变化的试验研究

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来源期刊

European Journal of Wood and Wood Products 工程技术-材料科学：纸与木材

CiteScore

5.40

自引率

3.80%

发文量

124

审稿时长

6.0 months

期刊介绍： European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.