摘要
高层建筑的基本自振周期是十分重要的结构动力特性,通过对特定结构形式的高层建筑进行现场测试,归纳总结一定规律,给出结构自振周期经验公式,可快速估算结构的动力特性及其承受的地震作用和风荷载。基于上海市9幢典型高层建筑的动力性能现场测试数据,识别了结构的基本自振周期并进行了统计分析;针对现行规范中有关高层框架-剪力墙结构的基本自振周期经验公式是基于高度在50 m以下的结构实测数据拟合而成的现状,给出了高度在30~130 m之间的结构在水平纵横两个方向上的基于结构高宽比的基本自振周期经验公式;首次给出了高度在90~190 m之间高层框架-核心筒结构在水平纵横两个方向上基本自振周期经验公式。给出的公式可供结构设计人员在高层建筑的初始设计阶段参考使用,该公式是对我国《建筑结构荷载规范》(GB50009-2012)的补充和完善。
The fundamental natural vibration period of a high-rise building is its very important dynamic characteristic. Through field testing a high-rise building with a specific structure, a certain law is summarized to deduce empirical formulas for its natural vibration periods, and rapidly estimate its dynamic characteristics and seismic action and wind load which it can bear. Here, based on dynamic performance field testing data of 9 typical high-rise buildings in Shanghai, their fundamental natural vibration periods were identified, and regression statistical analysis was done. According to the empirical formula for the fundamental natural vibration period of high-rise frame-shear wall structures fitted using actual measured data of structures with a height of lee than 50 m in the current code, empirical formulas for fundamental natural vibration periods of structures with a height of 30-130 m in longitudinal direction and lateral one, respectively of cross-section were deduced based on the aspect ratio of structures. Empirical formulas for fundamental natural vibration periods of high-rise frame-core tube structures with a height of 90-190 m in longitudinal direction and lateral one, respectively of cross-section were deduced for the first time. The proposed formulas here provided a reference for designers working in initial design stage of high-rise buildings. These formulas were supplement and perfection of the current code for loads of building structures(GB50009-2012).
作者
闫培雷
孙柏涛
YAN Peilei;SUN Baitao(Key Laboratory of EarthquakeEngineering and Engineering Vibration of China Earthquake Administration,Harbin 150080,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2019年第15期103-108,共6页
Journal of Vibration and Shock
基金
中国地震局工程力学研究所基本科研业务费专项(2014B11)
中国地震局创新团队发展计划资助(中国大陆地区地震灾害模拟与评估)
国家自然科学基金青年基金项目(51508531)
国家自然科学基金青年基金项目(51708524)
黑龙江省博士后科研启动金项目(LBH—Q18033)
关键词
框架-剪力墙结构
框架-核心筒结构
环境激励法
基本自振周期
回归分析
frame-shear wall structure
frame-core tube structure
environmental excitation
fundamental natural vibration period
regression analysis
