轻型木结构房屋动力特性现场实测及研究  

Field Test and Investigation on Dynamic Characteristics of Wood Frame Buildings

作　　者：何敏娟[1] 李峰[1] 倪春 

机构地区：[1]同济大学建筑工程系,上海200092 [2]加拿大林产品创新研究院

出　　处：《特种结构》2014年第5期6-10,共5页Special Structures

基　　金：国家自然科学基金(51378382)

摘　　要：本文对国内不同规模的轻型木结构房屋做了动力特性现场实测,并选取部分房屋做了不同施工阶段的跟踪实测,研究了轻型木结构房屋的自振周期、阻尼比以及非结构构件对其动力特性的影响,使用简化模型研究了结构的整体抗侧刚度。结果表明,随着结构高度增大,基本自振周期增大;结构基本自振周期实测值小于规范值,结构的实际刚度大于规范预计。石膏板等非结构构件安装之后,对轻型木结构房屋的初始抗侧刚度影响较大,轻型木结构自振周期有明显降低,石膏板等非结构构件参与了结构耗能,使结构阻尼比明显增大。Field tests were performed on wood frame buildings of different sizes to get the dynamic characteristics and some buildings were tested at different construction stages. The tested values were used to investigate natural period, damping ratio and the impact of non-structural members to the dynamic characteristic of wood frame buildings. A simplified model was used to calculate the stiffness of the structure. The results showed that with the increase of the height of the structure, the natural period increased. The measured values of the natural period are less than the specified values and the building code underestimated the stiffness of wood frame buildings. The nataral period and damping ratio vales increased significantly after the installation of non-structural elements, for example, gypsum board. Gypsum board and other non-structural elements would increase the stiffness of wood frame buildings significantly and could dissipate energy in earthquake.

关 键 词：木结构房屋 动力特性 现场实测 非结构构件 

分 类 号：TU366.2[建筑科学—结构工程] TU311.3