基于线性结构模型的古塔刚度中心识别方法研究  

RESEARCH ON THE IDENTIFICATION METHOD OF ANCIENT PAGODA STIFFNESS CENTER BASED ON LINEAR STRUCTURAL MODEL

作　　者：曹笑楠 杨娜[1,2] 白凡 CAO Xiao-nan;YANG Na;BAI Fan(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]结构风工程与城市风环境北京市重点实验室,北京100044

出　　处：《工程力学》2024年第6期154-163,201,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(52008020);高等学校学科创新引智计划项目(B13002)。

摘　　要：基于动力测试的古塔结构状态评估是其预防性保护工作的重要一环。该文结合动力测试方法,提出了一种基于线性结构模型进行古塔刚度中心识别的方法。基于偏心结构动力学理论凝练了非同轴刚度偏心的古塔计算模型与特征方程;基于Bayesian理论线性结构识别模型的推导及Gibbs抽样开展了结构物理参数识别,并结合经典算例对识别结果进行了验证;将该方法应用到我国重点保护文物开元寺塔的刚度中心识别中。The structural condition assessment of ancient pagoda based on ambient vibration test(AVT)is an important part of its preventive protection work.Combined with the AVT method,a method to identify the stiffness center of the ancient pagoda is proposed based on the linear structural model in this paper.Based on the dynamic theory of eccentric structure,the calculation model and characteristic equation of the non-coaxial stiffness eccentric ancient pagoda are condensed.The derivation of the linear structure identification model based on Bayesian theory and Gibbs sampling are used to identify the physical parameters of the structure.The identification results are verified by combining with classical examples.The method is then finally applied to the identification of the stiffness center of the Kaiyuan Temple Pagoda,a key cultural relic in China.

关 键 词：古塔结构 刚度中心 线性结构识别模型 Bayesian理论 物理参数识别 

分 类 号：TU317[建筑科学—结构工程]