摘要
古建筑木结构中斗栱形制及补间铺作斗栱的布置有清晰的历史演变规律。为研究斗栱的尺度从大到小、补间铺作的斗栱数量由少到多的变化对古建筑木结构抗震性能的影响,以饶益寺大佛殿和保国寺祥符殿的铺作层布置为参照,设计出4种不同铺作层布置的数值模型,并对其进行地震作用下的动力时程分析,研究不同铺作层布置的模型在不同地震激励作用下柱脚、普拍枋顶面、斗栱顶面的加速度和位移反应。研究结果表明:在水平地震作用下,柱脚、普拍枋顶面、斗栱顶面的加速度依次减小。当斗栱的尺度减小后,铺作层对地震动加速度的衰减作用降低,侧向变形能力也减小。当斗栱的尺度不变,布置数量越多、布置越规整,铺作层对地震动加速度的衰减作用越强,柱架层及铺作层的侧向变形也减小。在强震作用下,斗栱的尺度减小后,额枋榫头及馒头榫处的应力虽均有增大,但馒头榫处的应力增加更明显。
The specification and layout of Bujian tou-kungs of ancient timber structure have a clear historical evolution. To study the effects of the scale of tou-kungs(from big to small) and the number of Bujian tou-kungs(from less to more) on the seismic performance of ancient timber structure, four simplified ancient timber models with different tou-kung schemes were designed based on the Raoyi Temple and Baoguo Temple. By means of the ABAQUS finite element program, elasto-plastic time-history analysis were conducted. Displacement and acceleration responses at column root, Pupaifang top and tou-kung top were studied under different input seismic excitations. The research results show that the acceleration is gradually reduced with the sequence of column root, Pupaifang top and tou-kung. The acceleration attenuation effect and lateral deformability decreased with the scale. As the number of tou-kungs increases and the regularity of layout of tou-kung enhances, the acceleration attenuation effect of tou-kung layer becomes stronger and the lateral deformability of tou-kung layer and column frame decreases. Under strong earthquake actions, damage of model mainly occurs at the Steamed Buns tenons and the connects of Efang and eaves column, and the main damage forms are separation of tenons from mortises and compression deformation of tenons.
作者
潘毅
袁双
郭瑞
张宇
张启
Pan Yi;Yuan Shuang;Guo Rui;Zhang Yu;Zhang Qi(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;Key Laboratory of Seismic Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, China;School of Architecture and Design, Southwest Jiaotong University,Chengdu 610031, China)
出处
《土木工程学报》
EI
CSCD
北大核心
2019年第3期29-40,共12页
China Civil Engineering Journal
基金
国家自然科学基金(51878559)
中国工程院咨询研究项目(2010-ZD-4)
关键词
古建筑木结构
铺作层布置
斗栱尺度
斗栱数量
抗震性能
数值分析
ancient timber structure
layout tou-kung layer
scale of tou-kung
number of tou-kung
seismic performance
finite element analysis
