木结构斗拱出挑层数对建筑抗震性能的影响  

Influence of the number of protruding layers of dougong on the seismic performance of wooden structures

作　　者：倪茜[1] 张衡 薛毓鑫 刘晓敏 段仁哲 薛中兴 NI Qian;ZHANG Heng;XUE Yuxin;LIU Xiaomin;DUAN Renzhe;XUE Zhongxing(School of Architectural&Civil Engineering,Xi’an University of Science&Technology,Xi’an 710054,China;China Northwest Architectural Design and Research Institute Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]西安科技大学建筑与土木工程学院,西安710054 [2]中国建筑西北设计研究院有限公司,西安710054

出　　处：《建筑结构》2024年第2期115-120,共6页Building Structure

摘　　要：木结构古建筑是世界建筑史的重要组成部分,目前的研究大部分集中在结构整体的抗震性能上,或者单独对构件的受力机理进行分析,主要的研究构件包括斗拱、柱、梁架等,但是在构件对整个结构抗震性能的影响方面研究较少。以殿堂型结构中的斗拱为研究目标,利用ANSYS和ABAQUS软件对其展开模态与动力时程分析。通过对不同层数的斗拱进行分析比对,总结出斗拱层数变化对其抗震性能的影响。结果显示,在地震波作用下两模型柱脚和柱顶位移相差不大,但屋脊位置的位移量五踩斗拱模型比三踩斗拱模型多40%,五踩斗拱的柱顶加速度比三踩斗拱的柱顶加速度小23.02%,五踩斗拱的屋脊加速度比三踩斗拱屋脊小24.27%,证明在一定范围内斗拱层数的增加有利于结构的耗能减震。Wooden ancient buildings are an important part of the history of world architecture.Most of the current researches focus on the seismic performance of the whole structure,or analyses of the stress mechanism of the component separately.The main research components include dougong,column,beam frame,etc,but there are few researches on the influence of the component on the seismic performance of the whole structure.Take the dougong in the palace structure as the research object,ANSYS and ABAQUS softwares were used to analyze its development mode and dynamic time history.Through analyzing and comparing the dougong with different number of layers,the influence of the change of dougong number on its seismic performance was summarized.The results show that the displacement of column feet and column tops of the two models is not much different under the action of seismic waves,but the displacement of the ridge position of the five-step dougong model is 40%more than that of the three-step dougong model,the acceleration of the column top of the five-step dougong is 23.02%smaller than that of the three-step dougong,and the acceleration of the ridge of the five-step dougong is 24.27%smaller than that of the three-step dougong.It is proved that the increase of the number of dougong layers in a certain range is beneficial to the energy dissipation and shock absorption of the structure.

关 键 词：木结构古建筑 斗拱 柔性系统 耗能减震 

分 类 号：TU366[建筑科学—结构工程]