钢筋和FRP筋混合配筋ECC-混凝土复合梁受弯性能试验研究  

Experimental study on flexural behavior of steel and FRP hybrid reinforced ECC⁃concrete composite beams

作　　者：姜景 张素康 王仪[3] 葛文杰[3,4] 严卫华 孙传智 曹大富 JIANG Jing;ZHANG Sukang;WANG Yi;GE Wenjie;YAN Weihua;SUN Chuanzhi;CAO Dafu(Jiangsu Jianyan Construction Engineering Quality and Safety Appraisal Co.,Ltd.,Nanjing 210008,China;Jiangsu Suke Construction Technology Development Co.,Ltd.,Nanjing 210008,China;College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China;Jiangsu Province Engineering Research Center of Prefabricated Building and Intelligent Construction,Suqian 223800,China)

机构地区：[1]江苏建研建设工程质量安全鉴定有限公司,南京210008 [2]江苏省苏科建设技术发展有限公司,南京210008 [3]扬州大学建筑科学与工程学院,扬州225127 [4]江苏省装配式建筑与智能建造工程研究中心,宿迁223800

出　　处：《建筑结构》2023年第17期98-103,共6页Building Structure

基　　金：科技部“高端外国专家引进计划”项目(G2022014054L);江苏省住建厅建设系统科技资助项目(2018ZD047,2021ZD06);甘肃省建设科技计划项目(JK2021-19);扬州市科技计划项目-市校合作专项(YZ2022194);2022年度(下半年)江苏省土木建筑学会科研课题。

摘　　要：为研究钢筋和FRP筋混合配筋ECC-混凝土复合梁受弯性能,制作了4组不同配筋类型的混凝土梁共16根进行受弯性能试验研究,每组为4根不同ECC替代高度试件。研究了配筋类型(钢筋和FRP筋各一组,钢筋和FRP筋混合配筋2组)和截面类型(混凝土梁、ECC-混凝土复合梁和ECC梁)对承载能力、变形、裂缝和破坏形态的影响。结果表明,ECC与混凝土具有良好的粘结性能;用受拉性能好的ECC替代混凝土以及采用混合配筋提高梁在弯曲荷载作用下抵抗变形和裂缝发展的能力,且抵抗能力随着ECC高度替代率和配筋截面含钢率的提高而增大;ECC基体中纤维具有良好的桥接作用,可实现ECC梁弯曲破坏时仅发生基体压碎,不产生崩裂。In order to investigate the flexural behavior of steel and FRP hybrid reinforced engineered cementitious composite(ECC)⁃concrete composite beams,four groups of different reinforcement type,a totally 16 concrete beams,were made and tested by flexural behavior experimental study,and one group has four specimens with different ECC replacement height.The effects of reinforcement type(one group reinforced with FRP bars,one with steel bars,and two groups hybrid reinforced with steel and FRP bars)and cross⁃section type(concrete beam,ECC⁃concrete composite beam and ECC beam)on the bearing capacity,deflection,crack and failure pattern were studied.The results show that the bonding between the ECC and concrete is good.Using ECC with good tensile performance replace concrete and hybrid reinforcement can effectively enhance the ability to resist deformation and crack.And the resist ability increases with the increase of ECC replacement height and the area ratio of steel to whole reinforcement.The fibers distributed in the ECC matrix have good bridging effect,result in the matrix crushing but no rupture occurred in the bending failure of ECC beam.

关 键 词：FRP筋 混合配筋 工程用水泥基复合材料 复合梁 受弯性能 

分 类 号：TU377[建筑科学—结构工程]