含嵌固墙体古建筑木结构震害数值模拟研究

英文篇名：Study on damage numerical simulation of an ancient wooden building embedded with masonry walls
中文刊名：建筑结构
英文刊名：Building Structure
作者：周乾 ; 闫维明 ; 纪金豹
英文作者：Zhou Qian~(1 ; 2) ; Yan Weiming~1 ; Ji Jinbao~1(1 Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit ; Beijing University of Technology ; Beijing 100022 ; China ; 2 Imperial Palace Museum ; Beijing 100009 ; China)
中文关键词：古建筑木结构 ; 震害 ; 动力响应 ; 嵌固墙体 ; 汶川地震
英文关键词：ancient wooden building ; earthquake damage ; dynamic response ; embedded wall ; Wenchuan Earthquake
出版日期：2010-01-25
机构：北京工业大学工程抗震与结构诊治北京市重点实验室;故宫博物院;
年：2010
期：01
出版单位：建筑结构

摘要

以四川广元市某古建筑木结构为例,在考虑墙体嵌固作用的基础上,研究了汶川地震下古建筑的震害症状与地震响应状况。采用ANSYS软件对该古建筑榫卯节点的半刚性特征及砖砌体与木构架的嵌固作用进行了模拟,并建立了结构的有限元模型。通过模态分析,获得了结构的基频和主振型;通过将汶川波进行调幅作用于该结构,获得了结构在不同时刻的内力及变形峰值,并获得了典型节点的地震响应曲线。结果表明:考虑墙体的嵌固作用后,该古建筑的基频为1.59Hz,振动形式以第一振型为主,地震作用下木构架产生的位移很小,内力均在容许范围内,且保持稳定的振动状态;墙体由于强度不足,在某些部位将产生破坏,与震害现状基本吻合。
An ancient wooden building with embedded masonry walls in Guangyuan city was taken as an example to study the damages of ancient buildings in Wenchuan Earthquake.Semi-rigid character of tenon-mortise joints and contacting effect between wall and wooden constitution were simulated with ANSYS program,and the finite element model of the structure was also built.Basic frequency and main modes of the structure were obtained from modal analysis.By applying the amplituding acceleration data of Wenchuan waves to the building,responses of displacement and inner forces of the structure were obtained.Results show that based on embedding effects of masonry walls,basic frequency of the structure is 1.59Hz,of which main mode is mode one.Under earthquake forces,the wooden constitution keeps stable vabration status and its responses with little displacement and inner forces are all within the acceptable values.On the other hand,the masonry walls will be destroyed on some parts under the earthquake because of strength failure,which are basically consistent with those of actual damage.

引文

[1]杨亚弟,杜景林,李桂荣.古建筑震害特性分析[J].世界地震工程,2000,16(3):12-16.
    [2]何玲,潘文,杨正海.村镇木结构房屋震害及抗震技术措施[J].工程抗震与加固改造,2006,28(6):94-101.
    [3]柯吉鹏.古建筑的抗震性能与加固方法研究[D].北京:北京工业大学,2004.
    [4]杨焕成.地震前后古代建筑的检查方法和加固维修措施[J].中原文物,1985,2:96-98.
    [5]FANG D P,I WASAKI S,YU M H.Ancient Chinese timberarchitecture-I:Experimental study[J].Journal of StructuralEngineering,2001,11:1348-1357.
    [6]FANG D P,I WASAKI S,YU M H.Ancient Chinese timberarchitecture-II:Dynamic characteristics[J].Journal of StructuralEngineering,2001,11:1358-1364.
    [7]仓盛,竺润祥,任茶仙,等.榫卯连接的古木结构动力分析[J].宁波大学学报(理工版),2004,17(3):332-335.
    [8]赵均海,俞茂宏,高大峰,等.中国古代木结构的弹塑性有限元分析[J].西安建筑科技大学学报,1999,31(2):131-133.
    [9]GB50165—92古建筑木结构维护与加固技术规范[S].北京:中国建筑工业出版社,1992.
    [10]梁思成.清式营造则例[M].北京:中国建筑工业出版社,1981.
    [11]周乾.故宫神武门防震构造研究[J].工程抗震与加固改造,2007,29(6):91-98.
    [12]王其超.滑动摩擦系数的确定[J].教学仪器与实验,1987,3(2):15-16.
    [13]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
    [14]《木结构设计手册》编辑委员会.木结构设计手册(第三版)[M].北京:中国建筑工业出版社,2005.
    [15]清华大学土木工程系.故宫东、西华门城楼内拟增建陈列厅后台基安全性能评估[R].北京:清华大学,2004.
    [16]姚玲.砖石古塔动力特性建模技术的研究与应用[D].扬州:扬州大学,2003.
    [17]GB50003—2001砌体结构设计规范[S].北京:中国建筑工业出版社,2002.