摘要
针对目前古建筑木结构研究领域中对屋盖梁架的动力性能研究甚少的现状,该文以殿堂型木结构为研究对象,按照《营造法式注释》的构造要求建立屋盖梁架层模型,通过对其进行动力性能分析,得出了屋盖梁架层的结构动力特性以及在各种工况作用下的位移最大响应值和加速度最大响应值,求解出了各梁架层的动力放大系数。研究表明:屋盖梁架模型的第一频率为1.486Hz;屋盖梁架模型的自振频率远远高于振动台试验整体结构模型的自振频率;梁架层最大位移值随地震作用和高度的增加而增大;大震(400gal)时半刚性榫卯连接的减震效果比中震(220gal)、小震(110gal)时的减震效果要好;层间动力放大系数值在1左右;屋盖层与铺作层的动力放大系数在0.9左右。
In view of the status that the dynamic property of the roof-beams has been researched very little in the present research field of ancient timber structure, the palace timber structure is taken as the study object, establishing its roof-beams layer model according to the structural requirements of the annotation of Ying-tsao fa-shih. By the analysis of the dynamic properties, it obtained the structural dynamic characteristics and the maximal response of its displacement and acceleration under different conditions, and got the seismic amplification coefficient of the beams layer. Research shows that the first frequency of roof model is 1.486 Hz; the nature frequency of the roof model is much bigger than that of the whole structure of shaking table test; the maximal displacement value of beam layer increases with the earthquake and model height; the shock absorption effect of semi-rigid connection Sun-Mao in major earthquake （400gal） is better than that in moderate earthquake （220gal）and minor earthquake （110gal）; the interlayer seismic amplification coefficient value lies in 1 or so; the seismic amplification coefficient between roof layer and arch shop lies in 0.9 around.
出处
《工程力学》
EI
CSCD
北大核心
2012年第8期184-188,201,共6页
Engineering Mechanics
基金
国家自然科学基金项目(59878043
51108373)
陕西省重点试验室建设项目(05JS17)
国家文物局文物保护科学与技术研究课题(20110123)
关键词
屋盖梁架
动力性能
分析
木结构
动力放大系数
古建筑
加速度
位移
roof-beams
dynamic properties
analysis
timber structure
seismic amplification coefficient
ancient building
acceleration
displacement
