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工程科学与技术:2011,43(6):70-78
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古建筑榫卯节点加固方法振动台试验研究
(1.北京工业大学 工程抗震与结构诊治北京市重点实验室;2.故宫博物院)
Aseismic Strengthening Methods on Chinese Ancient Tenon-mortise Joint by Shaking Table Tests
(1.Beijing Key Lab. of Earthquake Eng. and Structural Retrofit,Beijing Univ. of Technol.;2.Imperial Palace Museum)
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投稿时间:2011-01-30    修订日期:2011-06-28
中文摘要: 为保护古建筑,采用振动台试验方法,研究了中国古建筑榫卯节点的有效抗震加固方法。基于某古建筑的实际尺寸,制作了1∶8缩尺比例的木结构空间框架模型,其中梁和柱采用燕尾榫形式连接。分别考虑马口铁、钢构件和CFRP布加固榫卯节点,进行了振动台试验。通过白噪声激励,获得了构架加固前后的基频及阻尼比;通过输入不同加速度峰值的El-Centro波,获得了典型节点的位移响应、加速度响应及减震系数等抗震参数。结果表明,构架加固前后的基频J(钢构件)>J(CFRP布)>J(马口铁)>J(未加固);阻尼比D(未加固)>D(马口铁)>D(钢构件)>D(CFRP布);构架位移响应峰值umax(CFRP布)
中文关键词: 木结构  抗震  动力响应  榫卯节点
Abstract:To protect Chinese ancient building,strengthening methods on Chinese ancient tenon-mortise joint were studied by shaking table tests. Based on actual sizes of an ancient wooden building, wooden frame models with a scale of 1∶8 of the prototype structure were built considering Yan-wei type of tenon-mortise connections.Iron hook,steel components and CFRP(Carbon Fibre Reinforced Plastic) sheets were considered to strengthen tenon-mortise joint of model to enhance its stability. By white noise excitation values of basic frequency as well as damping ratio of model in both strengthened and unstrengthened conditions were obtained.By inputing El-Centro earthquake waves of different peak acceleration values, responses of displacement and acceleration for typical nodes of model were obtained, and vibration absorption ratio values for both model and tenon-mortise joint were discussed.Results showed that for different strengthening method:J(steel components)>J(CFRP sheets)>J(iron hook)>J(no-strengthen) in basic frequency of model(J).D(no-strengthen)>D(iron hook)>D(steel components)>D(CFRP sheets) in damping ratio of model(D).umax(CFRP sheets)
文章编号:201100106     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(50878010);故宫博物院科研基金资助项目(KT2007-4);文化部科技创新基金资助项目(17-2009)
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周乾,闫维明,李振宝,张博.古建筑榫卯节点加固方法振动台试验研究[J].工程科学与技术,2011,43(6):70-78.
Zhou Qian,Yan Weiming,Li Zhenbao,Zhang Bo.Aseismic Strengthening Methods on Chinese Ancient Tenon-mortise Joint by Shaking Table Tests[J].Advanced Engineering Sciences,2011,43(6):70-78.