砖石古塔结构基本周期预测

Fundamental Period Prediction of Ancient Masonry Pagoda Structure

为了快速预测古塔结构的动力特性,尤其是数量较多的砖石古塔结构的基本周期/频率,本文首先在结构动力学基本公式的基础上,提出了砖石古塔结构基本周期/频率预测公式的基本形式。其次收集了国内砖石古塔的实测结构基本周期/频率,通过数据拟合的方法获得了半理论半经验的砖石古塔结构基本周期预测公式。将古塔结构的实测基本周期与预测公式计算结果进行了比较,结果表明预测偏差在14%以内。该预测公式能较准确地预测结构状态良好的砖石古塔结构的基本周期,满足文物保护工程的要求。

In order to quickly predict the dynamic characteristics of ancient pagoda structures,especially the basic period/frequency of a large number of ancient masonry pagoda structures,this paper first puts forward the basic form of the basic period/frequency prediction formula of ancient masonry pagoda structures on the basis of the basic formula of structural dynamics.Secondly,the measured basic period/frequency of ancient masonry pa-godas in China was collected,and a semi-theoretical and semi-empirical prediction formula for the basic period of ancient masonry pagodas was obtained by means of data fitting.The measured basic period of the ancient pa-goda structure was compared with the calculation result of the prediction formula.The result showed that the prediction deviation was less than 14%.The prediction formula can accurately predict the basic period of ancient masonry pagoda structure in good structural condition,and meet the requirements of cultural relics pro-tection projects.