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对宋代殿堂式木构建筑心间缩尺模型已残损的燕尾榫节点用碳纤维(CFRP)布进行加固,并进行模拟地震振动台试验。选用El Centro波、Taft波、兰州波作为输入地震波,采用多点多指标同步测量柱根、柱头、斗栱的地震响应,对CFRP加固模型结构的破坏形态、动力特性、耗能能力进行分析。结果表明:CFRP加固模型的自振周期T的变化范围在0.53～0.67 s之间,阻尼比ξ的变化范围在2.8%～4.6%之间,随着地震激励的增加而增大;加固模型的动力放大系数β小于1,随着地震激励的增加而减小;模型的铺作层、柱础层通过摩擦滑移来耗能,柱架层的耗能能力最强,在模型整体的耗能、减震中起着主要作用。
To the Song dynasty temple building wooden heart scale model has damaged the dovetail joints with carbon fiber (CFRP) cloth reinforcement, and simulation of seismic shaking table test. The El Centro wave, Taft wave and Lanzhou wave are selected as the input seismic waves. The seismic responses of column root, stigma and bucket are simultaneously measured by multi-point and multi-index, and the damage morphology, dynamic characteristics and energy dissipation capacity of CFRP strengthened model are analyzed. The results show that the natural period T of CFRP reinforcement model varies from 0.53 to 0.67 s and the damping ratio ξ ranges from 2.8% to 4.6%, and increases with the increase of earthquake excitation. The dynamic amplification factor β is less than 1, and decreases with the increase of earthquake excitation. The bedded and columnar layers of the model consume energy through frictional sliding, and the columnar layer has the strongest energy dissipation capacity. , Shock absorption plays a major role.