基于多源实测数据的RC结构基本周期统计分析

Statistical analysis of fundamental period of RC structure based on multi-source measured data

通过海量文献检索,收集了不同国家和地区的873栋、高度100 m以下钢筋混凝土(RC)结构的实测信息,获得了长轴、短轴共1482个基本周期值,利用聚类分析方法检验数据集的代表性及可整合性,进而统计分析了基本周期随结构高度、层数、高宽比的分布规律。参照国内外已有RC结构的自振周期经验算式,结合结构概念设计,给出了基本周期与结构几何参数的回归公式,并对比讨论了数据库中部分子集的分布差异,可供工程设计和参数化建模参考。

Here,through massive literature retrieval,the measured information of 873 reinforced concrete(RC)structures in different countries and regions with a height of less than 100 m was collected to obtain a database including 1482 fundamental period values about these structures’section long and short axes.The cluster analysis method was used to check the representativeness and integrability of the database,and then distribution laws of fundamental period versus structure height,number of floors and height-width ratio were analyzed statistically.Referring to the existing empirical formulas of natural vibration period of RC structures at home and abroad,combined with the structural conceptual design,regression formulas for fundamental period and structural geometric parameters were deduced,and distribution differences of part subsets in the database were discussed contrastively.The results can provide a reference for engineering design and parametric modeling.