摘要
介绍了我国第一所采用现代木结构建造的四川省都江堰向峨小学三栋校舍的结构动力特性现场实测方法及结果,并将实测的结构基本自振周期和阻尼比与规范建议值进行了对比和分析。研究发现的采用脉动法测试得到的木结构校舍的自振周期和阻尼比均小于规范建议值的现象后,指出这是由于环境脉动对结构的激励幅值非常小,向峨小学校舍是全新的结构,导致实测阻尼偏小。据此认为规范给出的用于结构地震作用计算的简化方法用于抗震设计是安全的。测试结果可以作为同类结构设计或研究时的参考。
Field tests were performed on three wood-frame constructions in Xiang＇E Elementary School Sichuan province,in order to get their dynamic characteristics.The values were compared with that provided by the code.Results showed that the value of fundamental periods and damping ratios gained from the field tests were smaller that those provided in the code because the small vibration amplitude.Difference between the test results and the code value has limited effect on the seismic design of wood-frame constructions.It is safe to calculate the earthquake action using the corresponding values provided by the code.The field tests results can be used as reference for the similar structural design and the research.
出处
《结构工程师》
2010年第3期130-134,共5页
Structural Engineers
基金
绿色节能可持续建筑体系的研究和成套技术开发示范(2008DFA71990)
关键词
现代木结构
动力特性
现场测试
自振周期
阻尼比
wood-frame construction
dynamic characteristics
field test
fundamental period
damping ratio
