摘要
以甪直保圣寺天王殿斗拱为参考对象，进行无缩尺松木斗拱模型的地震台试验研究。通过对斗拱的加速度与动力放大系数变化趋势、斗拱在振动过程中位移响应变化特征、斗拱变形最大时刻和各构件变形最大时刻的滑移位移和回转位移数值对比分析，得出以下结论：地震加速度用于衡量地震烈度，并不能直接反映斗拱试件的最大变形；振动频率的变化对斗拱回转变形的变化起重要作用，振幅是决定各构件水平滑移的主要因素；各构件变形最大值与斗拱整体变形最大值具有很强相关性，其中栌斗和华拱的回转变形对斗拱的整体变形而言，处于支配地位；斗拱的华拱连下昂部分主要起装饰作用，其榫卯连接节点位置在振动过程中较为薄弱，在对实际文物维护修缮过程中应引起重视并采取相关加固措施。
Abstract
Taking the Dougong of Tianwang palace in Baosheng Temple ,Luzhi as a case,experimental study was carried out on shaking table tests of the full-scale pine Dougong model.Analysing the acceleration and dynamic magnification coefficient trends,the process of displacement characteristics of Dougong in response to changes of vibration,and the rotary and sliding displacement values of Dougong and each component at the biggest deformation moments.Major conclusions are as follows,Seismic acceleration indicates the response of seismic intensity,instead of the maximum deformation of the Dougong specimens.Vibration frequency has important influence on the degree of rotation deformation,while amplitude has decisive effect on the sliding displacement of each component.The maximum deformation of Dougong and each component all have a strong correlation,among which the rotary displacement of Ludou and Huagong occupies a dominant position.Huagong with xia-ang,which is a special part of Dougong,is mainly for decoration and it's weak on connection node position during the shaking table tests.So more attention and relevant reinforcement measures should be taken on this part in the maintenance and conservation of cultural relics.
基金项目
“十二五”国家科技项目(2012BAD24B010204)
江苏高校优势学科建设工程项目(PAPD201104)
国家级大学生创新创业训练计划(201410298016Z)
NETL
NSTL
维普
万方数据