建筑结构学报2024，Vol.45Issue(6)：16-24,9.DOI:10.14006/j.jzjgxb.2023.0461
高层建筑结构基本自振周期合理范围研究
Study on reasonable range of fundamental natural period of vibration of high-rise buildings
摘要
Abstract
The fundamental natural period of vibration(T1)of high-rise buildings reflects the quality and stiffness distribution characteristics of high-rise buildings.In the structural scheme design stage,controlling the fundamental natural period of vibration within a reasonable range can not only automatically meet the main design indicators of the structure,but also guide more reasonable structural design.In this article,the statistical data of 837 high-rise buildings over 50 meters in China were analyzed,and the reasonable range and distribution law of the fundamental natural period of vibration of high-rise buildings with different seismic design intensities and heights were obtained.Based on a simplified model,practical calculation formulas of T1 considering structural height were derived.Statistical data analysis and practical formulas indicate that T,is directly proportional to the square root of the structural height(√H)and the scale factor(T1/√H)will increase when the height increases and will decrease when the fortification intensity increases.The upper limit of the reasonable range of T1/√H of high-rise buildings with a height of more than 250 m is around 0.40,and is 0.37 for the seismic fortification intensity of 8,0.42 for the intensity of 7,and 0.44 for the intensity of 6.If T1/√H reaches or exceeds 0.50,the structure is too flexible.关键词
高层建筑/基本自振周期/周期范围/合理刚度/实用公式/周期限值Key words
high-rise building/fundamental natural period of vibration/range of period/reasonable stiffness/practical formula/permissible value of period分类
建筑与水利引用本文复制引用
徐培福,陈才华,邱盛源..高层建筑结构基本自振周期合理范围研究[J].建筑结构学报,2024,45(6):16-24,9.基金项目
国家重点研发计划(2022YFC3801200),中国建筑科学研究院有限公司科研项目(20220122330730017),中建研科技股份有限公司科研项目(20221902977130039). （2022YFC3801200）
