钢筋混凝土结构构件局部地震损伤多尺度监测方法

提出一种结构局部地震损伤过程的多尺度监测方法。首先,在混凝土材料尺度上,针对混凝土材料细观随机性影响问题,基于压电智能骨料进行混凝土压应力监测,通过试验方法建立了混凝土损伤全过程中压电智能骨料应力与混凝土宏观应力的概率统计关系;其次,在截面尺度上,基于MEMS倾角仪转动监测方法,提出混凝土压弯构件截面曲率的监测方法,并通过试验验证了该方法的可行性;最后,在构件尺度上,提出基于转动积分的层间变形监测方法并给出了转动监测位置的设计原理,通过构件试验验证了该监测方法的可靠性。

Multi-scale Monitoring Method for Local Seismic Damage of Reinforced Concrete Structure Members

A multi-scale monitoring method for local seismic damage of RC structures has been proposed. Firstly, on the material scale, smart aggregate monitoring was conducted to consider the effect of randomness of concrete material in meso-scale, and tests were carried out to establish the statistical relationship between the stresses of smart aggregates and the stress in concrete during the overall damage process. Secondly, on the cross-section scale, by using MEMS inclinometer to measure the rotation in structural cross-section, a monitoring method is proposed to obtain sectional curvature of concrete members and its feasibility is evaluated through experiments. Finally, on the member scale, a monitoring method is developed to obtain the inter-story drift, which is based on the integration of monitored cross-section rotation by using MEMS inclinometers. The design principle of the monitoring locations is given and its reliability is validated through specimen loading test.