连续纤维在工程结构加固中的应用

纤维聚合物(Fiberreinforcedpolymer,简称FRP)复合材料由于其质轻、高强、耐腐蚀等特点,已被广泛应用于土木工程中。为了更好地维修加固桥梁、延长构件的使用寿命,文中对普通粘贴FRP加固法、嵌入式加固法(NearSurfaceMounted,简称NSM)以及预应力FRP加固法在工程结构加固中的应用进行了概述。提出了粘贴FRP加固工程结构中,被加固构件的长期性,包括复合材料和粘贴固化后的老化性能、耐久性能,胶粘剂徐变收缩对梁体性能的影响以及疲劳可靠性、加固结构的整体性能等问题,这些问题都有待进一步研究解决,并拟将预应力加固技术应用于铁路桥加固工程中。

APPLICATION OF CONTINUOUS FIBRE IN REINFORCEMENT OF ENGINEERING STRUCTURE

The complex materials of fiber reinforced polymer is widely applied in civil engineering because of its features of light mass,thigh strength and anti-corrosion.The application of reinforcement methods of ordinary pasting fibre reinforced polymer,near surface mount and prestressed fibre reinforced polymer are presented in this paper in order to maintain and reinforce bridge better and increase the service life of bridge's members.The problems related to the duration of reinforced members pasted by fibre reinforce polymer for reinforce engineering structure are pointed out,including aging and duration performances of complex materials and its performance after solidification,influence on performance of girder body by slow contraction of adhesive,fatigue reliability and overall performance of reinforced structure.These problems have to be further studied and solved.The reinforcement technique of prestress will be applied in reinforcement of railway bridge.