Study on reasonable range of fundamental natural period of vibration of high-rise buildings

被引：0
作者：
Xu P. [1 ]
Chen C. [1 ,2 ]
Qiu S. [1 ,2 ]
机构：
[1] China Academy of Building Research, Beijing
[2] China Academy of Building Research Technology Limited Company, Beijing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 06期
关键词：
fundamental natural period of vibration; high-rise building; permissible value of period; practical formula; range of period; reasonable stiffness;
D O I：
10.14006/j.jzjgxb.2023.0461
中图分类号：
学科分类号：
摘要：
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 T1 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. © 2024 Science Press. All rights reserved.
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页码：16 / 24
页数：8
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