湖南大学学报（自然科学版）2019，Vol.46Issue(1)：55-64,10.DOI:10.16339/j.cnki.hdxbzkb.2019.01.006
古建筑木结构地震损伤分析及抗侧刚度识别
Seismic Damage Analysis and Lateral Stiffness Identification for Ancient Wooden Structures
摘要
Abstract
In order to study the inter-story lateral stiffness damage and identification of ancient wooden struc-tures under strong earthquakes, the inter-story lateral stiffness, lateral displacement response and the sensitivity of displacement to stiffness were analyzed by the shaking table test of an ancient timber frame with a scale ratio 1:3.52.Based on the simplified mechanics model considering the column sliding, the structural state equation and observa-tion equation were deduced. Considering the influence of noise, the lateral stiffness was identified by means of Par-tial Least Squares-Singular Value Decomposition (PLS-SVD) and Extended Kalman Filter (EKF). The analysis results show that the ratio of inter-story lateral stiffness gradually decreases with the increase of seismic damage. The damage of column layer is especially sensitive to the increase of lateral displacement. The identified error of the lat-eral stiffness is about 10％ without damage. Under the damage condition, the identified error of the lateral stiffness is about 15％～20％. Through the lateral stiffness identification of Bell Tower of Xi'an, it indicates that the method of PLS-SVD and EKF has high accuracy and good applicability, and can provide a theoretical basis for monitoring the change of lateral stiffness and offering warning before structural collapse.关键词
古建筑木结构/抗侧刚度/地震损伤/识别Key words
ancient wooden structure/lateral stiffness/seismic damage/identification分类
建筑与水利引用本文复制引用
薛建阳,白福玉,张锡成,周超锋..古建筑木结构地震损伤分析及抗侧刚度识别[J].湖南大学学报（自然科学版）,2019,46(1):55-64,10.基金项目
国家自然科学基金资助项目(51678478) （51678478）
陕西省自然科学基础研究基金资助项目(2016JQ5060) （2016JQ5060）
陕西省教育厅科研计划项目(15JK1444) （15JK1444）
