摘要
针对碳纤维增强塑料(CFRP)加固钢结构,基于加固材料自身的力阻功能特性,提出以覆盖在结构表面的CFRP加固层作为传感器实施结构的变形与损伤监测。开展了CFRP加固钢梁的三点弯曲实验,利用四电极法监测了加载过程中CFRP加固层的电阻响应。结果表明,在循环加载过程中,无论是位于受拉侧还是受压侧,CFRP加固层的电阻均能及时响应结构的变形,而且具有良好的线性和重复性;在单调加载至屈服阶段时,CFRP加固层的电阻响应曲线相应地出现转折点,当结构破坏时,该电阻响应曲线发生突变。实验结果为CFRP加固钢梁变形与损伤的自监测提供了依据。
Carbon-fiber Based on the piezoresistivity reinforced layer as the sensor reinforced plastics （CFRP） can be used to strengthen the steel structures. of strengthened materials, this paper proposed a method that used CFRP to monitor the deformation and damage of structures. were conducted on CFRP strengthened steel structures and four-probe method Three-point bending tests was used to monitor the resistance response of CFRP reinforced layer. The experimental resuhs show that during the cycling loading test, the resistance of the CFRP-reinforced layer can respond to the deformation of the structure, and the response curve has good linearity and repeatability whether on the tension side or the compression side of structures. In the period of the structure＇s monotonous loading and yielding, the inflection point appears correspondingly in the resistance response curve of the CFRP-reinforced layer. When the structure is destroyed, the resistance response curve abruptly changes, which provides the basis for the self-monitoring of the deformation and damage of steel beams strengthened by CFRP.
出处
《塑料工业》
CAS
CSCD
北大核心
2018年第1期152-155,共4页
China Plastics Industry
基金
国家级大学生创新创业训练计划项目(201710488020)
湖北省自然科学基金资助项目(2016CFB265)
国家自然科学基金资助项目(51608401)
关键词
碳纤维增强塑料加固结构
力阻效应
四电极法
健康监测
Carbon-Fiber Reinforced Plastics Strengthened Structures
Piezoresistivity
Four-probe Method
Health Monitoring
