文献类型：期刊文献

英文题名：Relationships Between Ultrasonic-Based Elastic Modulus Loss, Mass Loss and Strength Loss in Two Hardwoods Commonly Used in Northern Chinese Timber Heritage

作者：Liu, Panpan[1,2] Gao, Yijie[1,3] Yeo, Sok Yee[1] Ma, Xingxia[4] Fukuda, Hiroatsu[2]

第一作者：Liu, Panpan

通信作者：Yeo, SY[1]

机构：[1]Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Dept Architecture, Xian 712000, Peoples R China;[2]Univ Kitakyushu, Fac Environm Engn, Kitakyushu 8080135, Japan;[3]Xian Space Engine Co Ltd, Xian 710100, Peoples R China;[4]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2026

卷号：16

期号：1

外文期刊名：BUILDINGS

收录：;EI(收录号：20260319917988);Scopus(收录号：2-s2.0-105027392751);WOS:【SCI-EXPANDED(收录号:WOS:001657480700001)】；

基金：This research was supported by the Ministry of Science and Technology of the People's Republic of China Research Fund for International Scientists (Grant No. QN2022170001L), the NSFC Research Fund for International Excellent Young Scientists (Grant No. W2432031), and the Shaanxi Provincial Young Talent Support Program (Grant No. 050700-71240000000035). The grants were awarded to Sok Yee Yeo.

语种：英文

外文关键词：hardwood decay; timber heritage; elastic modulus loss ratio; mass loss rate; strength loss ratio

摘要：Assessing decay-induced mechanical deterioration in hardwood components is essential for the conservation of northern Chinese timber heritage, where structural members such as the Dou and Gong have been exposed to complex environments for centuries. Within a unified experimental framework, this study systematically investigated the mechanical degradation behavior of two hardwood species commonly used in traditional timber buildings in northern China-elm (Ulmus pumila L.) and Chinese scholar tree (Styphnolobium japonicum (L.) Schott)-subjected to controlled brown-rot fungal decay (Gloeophyllum trabeum) over decay durations of 0-6 months. Four mechanical loading configurations were considered: tension, bending, compression parallel to grain and compression perpendicular to grain. Decay progression was quantitatively characterized using mass loss rate (MLR), ultrasonic elastic modulus loss rate (ELR) and strength loss ratio (SLR). The two hardwoods exhibited distinct material- and loading-dependent deterioration patterns. Elm showed faster and more variable degradation, with clearer time-dependent strength loss under tension and bending, whereas Chinese scholar tree displayed slower and more scattered strength deterioration. For both species, elastic modulus reduction generally preceded measurable mass loss, indicating that modulus-based indicators are more sensitive to decay progression under the tested conditions. Correlation analyses further indicate that ELR tends to show more stable and consistent associations with strength loss than MLR across most loading modes. Overall, the results suggest that elastic modulus-based ultrasonic indicators have potential advantages for characterizing mechanical deterioration under controlled decay conditions. However, the findings are limited to the tested materials, decay scenarios and loading configurations, and further validation on aged or naturally decayed components is required before in situ application to heritage structures can be established.