智能CFRP加固RC梁荷载效应模拟与测评  

Simulation and evaluation of load effects in smart CFRP-strengthened RC beams

作　　者：卢少微[1] 谢怀勤[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《华中科技大学学报（自然科学版）》2006年第7期93-95,114,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：黑龙江省自然科学基金资助项目(2002.E01-10);哈尔滨科技攻关项目(0111211107).

摘　　要：将布拉格光栅光纤(FBG)传感器固化于碳纤维复合材料(CFRP)试件中,构成智能CFRP.试验结果表明FBG传感器与CFRP相容性良好;FBG传感器与传统电阻应变片具有理想线性关系,FBG的应变传感特性精确稳定.制备4根CFRP加固RC实验梁,并在受拉钢筋、压区混凝土及底部加固CFRP中预置了FBG传感器.根据FBG传感原理、钢筋混凝土理论和Ansys有限元软件编制RC梁荷载效应模拟程序.对实验梁进行弯曲加载实验.根据置入CFRP中FBG传感器的监测应变值,应用有限元模拟计算程序得到梁实时模拟荷载及诸项荷载效应模拟值.结果表明受拉钢筋与压区混凝土实时模拟应变与传感器实测应变相符合,模拟挠度与实测挠度也相符合,模拟实时荷载与实际荷载基本一致.从而达到集加固与测评双重功能于一体的目的.Smart Carbon fiber reinforced polymers （CFRP） was fabricated by curing FBG sensor into CFRP. The experimental results show that FBG sensor is compatible with CFRP very well; the linear relationship between FBG sensor and strain gauge is uniform; the sensing performance of FBG is accurate and stable. This paper manufactured 4 pieces of CFRP-strengthened RC beams embedded FBG sensors in the steel, concrete and CFRP. The simulation program of flexural load effects for RC beams is compiled based on the FBG sensing mechanics and theory of reinforced concrete and finite el- ement software Ansys. According to the monitoring strain from FBG sensor embedded in CFRP, the real-time simulated load and simulated load effects are obtained by Ansys simulated program. The experimental results show that the simulated strains and the measured strains of tensile steel and compressive concrete agree well, the simulated deflection and the measured deflection is consistent, the simulated load and the applied load agree well.

关 键 词：碳纤维复合材料 钢筋混凝土梁 加固 模拟 测评 

分 类 号：TU528[建筑科学—建筑技术科学]