基于CMCM方法的钢管混凝土框架结构损伤识别

Damage Identification of Concrete-filled Tube Frame Structure Based on Cross Model Cross Mode

设计一个比例为1∶4的4层钢管混凝土带楼板的空间框架结构模型,通过柱端钢管切口损伤来模拟震后钢管混凝土框架结构损伤,进行脉冲激励模态试验,得到健康状态和损伤状态结构的模态参数。数值模拟对应试验工况下的损伤位置和损伤程度并得到相应的模态参数。通过交叉模型交叉模态(Cross Model Cross Mode,简称CMCM)方法对钢管混凝土框架结构进行损伤识别研究,验证CMCM方法的可行性和有效性。

Based on the relevant provisions of the current specifications,a four-storey spatial frame model with two spans and two bays was designed and manufactured.The model was made of concrete-filled square steel tube,steel beams,and composite floor.The model damage level was simulated by making incisions at the column end,and impulse excitation modal tests was conducted to obtain the modal parameters of the structure in health and damage.The damage position and degree of concrete-filled tube frame structures were simulated according to experimental conditions.The cross model cross mode(CMCM)method was used to identify the damage of concrete-filled steel tube frame structure,and the feasibility and validity of CMCM method were also verified.