文献类型：会议论文

英文题名：Relationship between Temperature and Bending Properties of Chinese Larch Wood

作者：Zhou, Haibin[1] Zhong, Yong[2]

通信作者：Zhou, HB[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

会议论文集：International Conference on Biobase Material Science and Engineering

会议日期：OCT 21-23, 2012

会议地点：Changsha, PEOPLES R CHINA

语种：英文

外文关键词：thermal effect; bending strength; larch wood; bending property

年份：2012

摘要：Wood is being used extensively in timber construction in China. It is important to understand its response when exposed to elevated temperatures. In fire-resistant design for timber construction, the main goal is to ensure that enough structural integrity is maintained during a fire to prevent structure collapse. To study the effect of temperature on bending strength (MOR) and stiffness (MOE) of Chinese larch wood, a total of 108 clear wood samples with various target temperatures were tested in static bending under same temperatures to ensure the wood temperature to be sustained. To study the interaction effect on Chinese larch wood, a total of 72 clear wood samples were observed under constant stress levels when the wood temperature was elevated. The results indicated that exposure to sustained temperatures caused significant degradation of bending strength and stiffness. The bending strength and MOE of larch wood behaved negative linear relationship with temperatures before 100 degrees C. Chinese larch wood was more susceptible to the coupling effect of temperature and stress. The interaction promoted a temporary stable flexural structure to collapse during a shorter exposure time.