首页|高层建筑结构基本自振周期合理范围研究

高层建筑结构基本自振周期合理范围研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
高层建筑基本自振周期T1反映了高层建筑质量和刚度分布特性,在结构方案设计阶段,控制基本自振周期在合理范围不仅能自动满足结构的主要设计指标,还能导向更合理的结构设计.通过分析国内837栋高度50 m以上高层建筑统计数据,得出不同设防烈度、不同高度分组高层建筑的基本自振周期的合理范围和分布规律,并基于简化模型推导了基本自振周期与结构高度关系的实用公式.统计数据分析以及实用公式均表明,T1与结构高度的平方根(√H)成正比,且T1/√H随高度增加而增大,随设防烈度提高而减小.高度250 m以上高层建筑基本自振周期合理范围上限值在0.40√H左右,其中8度设防区为0.37√H、7度设防区为0.42√H、6度设防区为0.44√H;如果达到或超过0.50√H,则结构刚度过柔.
Study on reasonable range of fundamental natural period of vibration of high-rise buildings
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.

high-rise buildingfundamental natural period of vibrationrange of periodreasonable stiffnesspractical formulapermissible value of period

徐培福、陈才华、邱盛源

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中国建筑科学研究院有限公司,北京 100013

中建研科技股份有限公司,北京 100013

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

国家重点研发计划中国建筑科学研究院有限公司科研项目中建研科技股份有限公司科研项目

2022YFC38012002022012233073001720221902977130039

2024

10.14006/j.jzjgxb.2023.0461

建筑结构学报
中国建筑学会

建筑结构学报

CSTPCD北大核心
影响因子：1.546
ISSN：1000-6869
年,卷(期)：2024.45(6)