向峨小学现代木结构校舍动力特性现场实测.pdfVIP

第 26卷第 3期 结 构 工 程 师 Vol. 26, No. 3 2010年 6月 Structural Engineers Jun. 2010 1 2* 2 刘 杰 康加华 熊海贝 ( 1. 北京国科天创建筑设计院, 北京 100097; 2. 同济大学土木工程学院, 上海 20092) 介绍了我国第一所采用现代木结构建造的四川省都江 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。 现代木结构, 动力特性, 现场测试, 自振周期, 阻尼比 F ield T ests on Dynam ic Ch aracter istics ofW ood2Fram e C on struction s in X ian g. E E lem en tar y School 1 2* 1 K NG Jiahua LIU Jie XIONGH aibei ( 1. BeijingGuoKeTian Chuang rchitecturalDesign Institute, Beijing 100097, China; 2. College ofCivilEngineering, TongjiUniversity, Shanghai200092, China) Ab str act Field testswere performed on threewood2frame constructions inXiang. E Elementary SchoolSichuan province, in order to get their dynamic characteristics. The valueswere comparedwith thatprovidedby the code. Results showed that thevalue of fundamentalperiods and damping ratios gained from the field testswere smaller that those provided in the codebecause the smallvibration amplitude. Differencebetween the test results and the code value has lmi ited effect on the seismic design ofwood2frame 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 smi ilar structuraldesign and the research. K eyword s wood2frame construction, dynamic characteristics, field test, fundamentalperiod, damping ratio