文献类型：期刊文献

英文题名：Low-cycle fatigue life and duration-of-load effect for hybrid CLT fabricated from lumber and OSB

作者：Song, Huan[1] Wang, Zhiqiang[1] Gong, Yingchun[2] Li, Long[3] Zhou, Jianhui[4] Gong, Meng[5]

第一作者：Song, Huan

通信作者：Wang, ZQ[1];Gong, YC[2]

机构：[1]Nanjing Forestry Univ, Coll Mat Sci & Engn, 159 Longpan Rd, Nanjing 210037, Jiangsu, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, 1 Dong Xiao Fu,Xiangshan Rd, Beijing 100091, Peoples R China;[3]Hubei Tianxin Timber Framed Bldg Mfg Co Ltd, Xinhe Ind Pk Rd, Hanchuan 431600, Hubei, Peoples R China;[4]Univ Northern British Columbia, Integrated Wood Engn, 499 George St, Prince George, BC V2L 1R7, Canada;[5]Univ New Brunswick, Wood Sci & Technol Ctr, 1350 Regent St, Fredericton, NB E3C 2G6, Canada

年份：2022

卷号：46

外文期刊名：JOURNAL OF BUILDING ENGINEERING

收录：;EI(收录号：20215011325805);Scopus(收录号：2-s2.0-85121004921);WOS:【SCI-EXPANDED(收录号:WOS:000775439500002)】；

基金：Acknowledgments The authors wish to acknowledge the National Natural Science Foundation of China (Grant Nos. 32071700 and 31570559) and TIANXIN TIMBER FRAMED BUILDING for testing materials and technical advices.

语种：英文

外文关键词：Hybrid cross-laminated timber; Low-cycle fatigue; Construction oriented strand board; Duration-of-load

摘要：Given the nature of cross-laminated timber (CLT), with an orthogonal arrangement and rolling shear characteristics of transverse layers, it has a more complex duration-of-load (DOL) effect than other engineered wood products, such as glued-laminated timber. Developing hybrid CLT (HCLT) with structural composite lumber, which can improve the mechanical properties and material sources of CLT, is gaining increasing interest. Construction oriented strand board (COSB) and spruce-pine-fir (SPF) dimension lumber were used to fabricate HCLT specimens for this study. The regular SPF CLT and HCLT specimens having different lay-ups and numbers of layers were subjected to low-cycle fatigue bending and shear loading tests. The Foschi and Yao damage accumulation model was calibrated using the test results. The DOL factors for the CLT and HCLT specimens were calculated using the stress ratio evaluation method. Results showed that the primary failure modes for the fatigue test specimens were the same as those observed in previous short-term ramp loading tests, and a good fit was observed between the model's predictions and the test data. The DOL factor corresponding to a load duration of 50 years, for a three-layer shear CLT specimen, was determined to be 0.53, which was lower than that recommended in CSA O86-19. The fatigue life and long-term performance of CLT were improved by using COSB panels as CLT layers. The HCLT specimens that used COSB only as the transverse layer showed advantages in fatigue life, long-term performance, and practical applications.