韩 艳,王龙龙
韩艳,王龙龙.CFRP板加固高强混凝土梁试验研究[J].混凝土与水泥制品,2021(4):78-82.
HAN Y,WANG L L.Experimental Study on Strengthening High-strength Concrete Beam with CFRP Plates[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):78-82.
CFRP板加固高强混凝土梁试验研究
韩 艳,王龙龙
韩艳,王龙龙.CFRP板加固高强混凝土梁试验研究[J].混凝土与水泥制品,2021(4):78-82.
HAN Y,WANG L L.Experimental Study on Strengthening High-strength Concrete Beam with CFRP Plates[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):78-82.
摘 要:通过三点弯曲试验,并利用CCD相机及数字散斑分析技术研究了CFRP板裂缝扩展至破坏的全过程。结果表明:各因素对试件承载力的影响程度从大到小依次为CFRP板厚、加载速率、裂缝深度、混凝土强度;粘贴CFRP板的高强混凝土试件破坏是由混凝土剪切破坏引起的CFRP板粘贴胶层与混凝土之间的界面剥离破坏,其从裂缝开始扩展到完全破坏的时间明显长于未粘贴CFRP板的试件;黏结界面仍是外粘CFRP板加固高强混凝土构件的薄弱部位。
Abstract: The whole process of the specimens from crack propagation to destruction was studied through the three-point bending test, and the CCD camera observation system and digital speckle analysis technology were used. The test results show that the order of influence factors on the bearing capacity of the high-strength concrete specimens is CFRP plate thickness, loading rate, depth of the pre-crack and the concrete strength. The failure of high-strength concrete specimens reinforced with external CFRP plates is the interface peeling damage between the CFRP plates adhesive layer and the concrete caused by the shear failure of the concrete, and the time from crack propagation to complete failure is significantly longer than that of the specimens without CFRP reinforcement. The bonding interface is still the weak part of the high-strength concrete members reinforced by externally bonding CFRP plates.
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州