多种施工偏差下预应力混凝土空心板的稳定承载力研究
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摘要
粘贴碳纤维片材加固型钢筋混凝土被称为一类新型混凝土加固方法,在多种施工偏差条件下,实验通过制作4块预应力混凝土空心板试件,在相同截面尺寸和等同配筋率情况下,分析不同粘贴方式和不同碳纤维粘贴量对试件承载能力影响。根据粘贴FRP加固混凝土构件设计指南,从理论角度计算出受到不同荷载力的预应力混凝土空心板极限承载力理论值。在近似均匀荷载力作用下进行抗弯承载力实验,并记录混凝土空心板开裂荷载数据、钢筋及碳纤维应变数据等,比较4块空心板数据值差异。实验结果表明:碳纤维粘贴层数对加固效果产生影响,粘贴层数越多空心板正截面承载力提升越高;通过粘贴碳纤维布对预应力混凝土空心板进行加固后,跨中挠度增加明显,显示碳纤维粘贴量多的板延性好,提升混凝土空心板结构抗弯剪承载力。
Carbon fiber sheet reinforced concrete is known as a new kind of concrete reinforcement method,in a variety of conditions under construction by making experimental deviation,4 pieces of prestressed concrete hollow slab specimens in the same section size and reinforcement ratio equal conditions,analysis of the bearing capacity of specimens of different type and different carbon paste paste.The amount of fiber. According to the design guidelines of FRP reinforced concrete members,the theoretical value of ultimate bearing capacity of prestressed concrete hollow slabs subjected to different loads is theoretically calculated. Under the action of approximate uniform load,the bending capacity test is carried out,and the cracking load data,reinforcement and carbon fiber strain data of concrete hollow slab are recorded. The difference of data between 4 hollow panels is compared. The experimental results show that carbon fiber layers affect the reinforcement effect,enhance the bearing capacity of the higher layers more hollow slab section; prestressed concrete slab strengthened by CFRP,the deflection ductility increased obviously,the display board of CFRP amount,improve the flexural shear structure concrete hollow plate.
Carbon fiber sheet reinforced concrete is known as a new kind of concrete reinforcement method,in a variety of conditions under construction by making experimental deviation,4 pieces of prestressed concrete hollow slab specimens in the same section size and reinforcement ratio equal conditions,analysis of the bearing capacity of specimens of different type and different carbon paste paste.The amount of fiber. According to the design guidelines of FRP reinforced concrete members,the theoretical value of ultimate bearing capacity of prestressed concrete hollow slabs subjected to different loads is theoretically calculated. Under the action of approximate uniform load,the bending capacity test is carried out,and the cracking load data,reinforcement and carbon fiber strain data of concrete hollow slab are recorded. The difference of data between 4 hollow panels is compared. The experimental results show that carbon fiber layers affect the reinforcement effect,enhance the bearing capacity of the higher layers more hollow slab section; prestressed concrete slab strengthened by CFRP,the deflection ductility increased obviously,the display board of CFRP amount,improve the flexural shear structure concrete hollow plate.
引文
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[2]郭伟丛,孙圣康.新型建筑材料泡沫混凝土的性能及应用[J].建材发展导向:上,2017,15(11):8-9.
[3]郝帆.基于神经网络的工程结构智能监测系统设计[J].电子设计工程,2016,24(23):112-114.
[4]秦焕朝.混凝土结构加固方案比较[J].建筑技术,2016,47(7):600-601.
[5]张婵,叶琳昌.混凝土结构耐久性与防水功能一体化研究的思考[J].新型建筑材料,2016,43(1):59-62.
[6]张景奎,崔德密,严卫中.混凝土缺陷智能化快速检测与定量识别技术研究[J].科学技术与工程,2016,16(19):288-293.
[7]丁声荣,霍艳华.混凝土结构建筑物抗震加固强度测试仿真[J].计算机仿真,2017,34(8):429-432.
[8]陈柯园.建筑结构加固设计与施工技术的应用[J].四川建材,2016,42(1):55-56.
[9]李勤,盛金喜,田飞.基于改进理想点法的建筑结构加固方案优选[J].工业建筑,2016,46(8):155-157.
[10]张国印,宋祥林,吴亚平.钢筋混凝土结构加固形式的探讨与分析[J].重庆建筑,2016,15(3):56-59.
[11]王桢,亢景付,王堃,等.FRP锚钉锚固长度对FRP加固混凝土构件拉拔性能影响的试验研究[J].硅酸盐通报,2017,36(4):1365-1370.
[12]王勃,刘杰,周柏成,等.FRP加固损伤混凝土结构研究综述[J].低温建筑技术,2017,39(3):33-35.
[13]郭生全,江俊杰,王旭良.FRP片材加固混凝土板研究进展[J].四川建材,2016,42(4):25-25.
[14]郭樟根,曹双寅,王安宝,等.化爆作用下FRP加固RC板的试验研究及动力响应分析[J].工程力学,2016,33(3):120-127.
[15]夏建中,竹相,黄竹也.CFRP板嵌入式加固受损RC梁抗弯性能试验研究与计算方法[J].科技通报,2016,32(7):72-76.