摘要
在桥梁建筑结构的加固中,有时存在一些高温环境,可能会使预应力碳纤维板产生较大的预应力损失,甚至出现碳纤维板的锚夹具夹持不牢而失效的情况.针对此设计了一组预应力碳纤维板试件,在高预应力水平(2 000 MPa左右)、高温环境(85℃左右)下进行应力损失观测;最后进行了碳纤维板的拉伸破断试验.试验观测表明,不计碳纤维板在放张时的短期应力损失,在11 d的高温及高应力双重作用下,预应力碳纤维板的总应力损失不足3%;拉伸破断试验也证实碳纤维板在波形锚中的锚固性能良好.
There are some hith-temperature environments in the structural reinforcement of bridges, in which large prestress losses of the prestressed carbon fiber plate may be occurred, even the anchor of the carbon fiber plate don＇t clamp strongly and is disabled eventual- ly. A group specimens of prestressed carbon fiber reinforced polymer （CFRP） plate were specially designed to observe stress losses un- der high prestress levels （ about 2 000 MPa） and high-temperature environment （ about 85 ~C ）. The tensile and breaking test on CFRP plate was carried out at last. Experimental observations showed that total stress losses of prestressed CFRP plate was less than 3% in the dual role of the ll-day high-temperature and high-stress, without taking short-term stress losses into account. The tensile and breaking test also confirmed the anchoring performance of CFRP plate was good in the wave-shape-gear-grip （WSGG） anchor.
出处
《华北水利水电学院学报》
2013年第1期67-69,共3页
North China Institute of Water Conservancy and Hydroelectric Power
基金
国家自然科学基金项目(51078370)
重庆市建设科技项目(110297)
关键词
波形齿夹具锚
碳纤维板
高温
高应力
锚固性能
wave-shape-gear-grip （WSGG） anchor
carbon fiber reinforced polymer （CFRP） plate
high temperature
high stress
anchoring performance
