中国古建筑木结构随机地震响应分析
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摘要
为保护古建筑,采用绝对位移直接求解的虚拟激励法,利用ANSYS有限元分析软件的谐响应分析模块,以故宫神武门为例,研究了均匀地面运动下古建筑木结构的随机地震动响应特征。建立了神武门的有限元模型,通过模态分析,获得了神武门的基频;通过一致均匀地面运动平稳激励作用下结构的响应分析,获得了结构典型节点的位移和加速度响应功率谱,并讨论了榫卯节点、斗木共、侧脚及基底滑移等构造的影响。研究表明:神武门的基频为1.07 Hz,在一致均匀地面平稳激励作用下,结构位移及加速度响应功率谱的峰值在与结构体系基频相同值时发生;榫卯节点、斗木共、侧脚及柱础浮搁等构造均有利于结构发挥抗震性能。
In order to protect Chinese ancient buildings,the Shen-Wu Gate in the Forbidden City was taken as an example to study its stochastic seismic response characters by absolute displacement solution based on pseudo excitation method and harmonic response analysis of ANSYS program.Finite element model of Shen-Wu Gate was built.Then by modal analysis basic frequency of the structure was obtained;By harmonic response analysis displacement and acceleration response power spectral density of typical nodes under even ground stationary random excitation were obtained.Constitution parameters were also discussed.Results show that basic frequency of Shen-Wu Gate is 1.07 Hz,under even ground stationary random excitation peak values of response power spectral density of the structure occur at its basic frequency value,constitutions such as tenon-mortise joints,tou-kung,cejiao,floating column base and so on are all practical for earthquake resistance.
In order to protect Chinese ancient buildings,the Shen-Wu Gate in the Forbidden City was taken as an example to study its stochastic seismic response characters by absolute displacement solution based on pseudo excitation method and harmonic response analysis of ANSYS program.Finite element model of Shen-Wu Gate was built.Then by modal analysis basic frequency of the structure was obtained;By harmonic response analysis displacement and acceleration response power spectral density of typical nodes under even ground stationary random excitation were obtained.Constitution parameters were also discussed.Results show that basic frequency of Shen-Wu Gate is 1.07 Hz,under even ground stationary random excitation peak values of response power spectral density of the structure occur at its basic frequency value,constitutions such as tenon-mortise joints,tou-kung,cejiao,floating column base and so on are all practical for earthquake resistance.
引文
[1]周乾,闫维明,周锡元,等.故宫神武门动力特性及地震反应研究[J].工程抗震与加固改造,2009,31(2):90-95.
[2]赵均海,俞茂宏,杨松岩,等.中国古代木结构有限元动力分析[J].土木工程学报,2000,33(1):32-35.
[3]周乾,闫维明,杨小森,等.汶川地震古建筑震害研究[J].北京工业大学学报,2009,35(3):330-337.
[4]周乾,闫维明,杨小森,等.汶川地震古建筑轻度震害研究[J].工程抗震与加固改造,2009,31(5):101-106.
[5]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[6]李永华,李思明.绝对位移直接求解的虚拟激励法[J].振动与冲击,2009,28(10):185-190.
[7]葛鸿鹏.中国古代木结构建筑榫卯加固抗震试验研究[D].西安:西安建筑科技大学,2004.
[8]Fang D P,Iwasaki S,Yu M H.Ancient Chinese Timber Architecture-I:Experimental Study[J].Journal of Structural Engi-neering,2001,11:1348-1357.
[9]姚侃,赵鸿铁,葛鸿鹏.古建木结构榫卯连接特性的试验研究[J].工程力学,2006,23(10):168-172.
[10]高大峰,赵鸿铁,薛建阳.木结构古建筑中斗木共与榫卯节点的抗震性能试验研究[J].自然灾害学报,2008,17(2):58-64.
[11]梁坦,王永维,倪士珠,等.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.
[12]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
[2]赵均海,俞茂宏,杨松岩,等.中国古代木结构有限元动力分析[J].土木工程学报,2000,33(1):32-35.
[3]周乾,闫维明,杨小森,等.汶川地震古建筑震害研究[J].北京工业大学学报,2009,35(3):330-337.
[4]周乾,闫维明,杨小森,等.汶川地震古建筑轻度震害研究[J].工程抗震与加固改造,2009,31(5):101-106.
[5]林家浩,张亚辉.随机振动的虚拟激励法[M].北京:科学出版社,2004.
[6]李永华,李思明.绝对位移直接求解的虚拟激励法[J].振动与冲击,2009,28(10):185-190.
[7]葛鸿鹏.中国古代木结构建筑榫卯加固抗震试验研究[D].西安:西安建筑科技大学,2004.
[8]Fang D P,Iwasaki S,Yu M H.Ancient Chinese Timber Architecture-I:Experimental Study[J].Journal of Structural Engi-neering,2001,11:1348-1357.
[9]姚侃,赵鸿铁,葛鸿鹏.古建木结构榫卯连接特性的试验研究[J].工程力学,2006,23(10):168-172.
[10]高大峰,赵鸿铁,薛建阳.木结构古建筑中斗木共与榫卯节点的抗震性能试验研究[J].自然灾害学报,2008,17(2):58-64.
[11]梁坦,王永维,倪士珠,等.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.
[12]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005.
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