BFRP筋含砖骨料再生混凝土梁抗弯性能试验研究  

Experimental study on flexural behavior of BFRP reinforced concrete beams with recycled brick aggregate

作　　者：黄靓[1] 秦明珠 邓鹏[1] 高畅 HUANG Liang;QIN Mingzhu;DENG Peng;GAO Chang(Department of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《混凝土》2022年第10期1-5,共5页Concrete

基　　金：国家重点研发计划(2019YFC1904700,2017YFC0703300)。

摘　　要：通过5根BFRP筋含砖骨料再生混凝土(Recycled Aggregate Concrete with Brick Aggregate,RAC-BA)梁、1根BFRP筋天然骨料混凝土(Natural Aggregate Concrete,NAC)梁和1根钢筋RAC-BA梁的弯曲破坏试验,探究筋材种类、受拉纵筋的配筋率、BFRP筋直径和再生骨料取代率等因素的影响。结果表明:BFRP筋RAC-BA梁表现出明显的脆性破坏特征。与钢筋RAC-BA梁相比,相同条件下的BFRP筋RAC-BA梁的承载性能更好,且挠度变形在规范允许的限值内。在设计BFRP筋RAC-BA梁时,可通过调整配筋率实现构件性能与成本的最优化。Based on the bending failure tests of five BFRP reinforced recycled aggregate concrete beams with brick aggregate,one BFRP reinforced natural aggregate concrete beam with brick aggregate and one reinforced recycled aggregate concrete beam with brick aggregate,the effects of reinforcement types,tensile longitudinal reinforcement ratio,BFRP reinforcement diameter and recycled aggregate replacement ratio were investigated.The results show that BFRP reinforced recycled aggregate concrete beams with brick aggregate exhibited obvious brittle failure characteristics.Compared with the reinforced recycled aggregate concrete beam with brick aggregate,the bearing capacity of BFRP reinforced recycled aggregate concrete beams with brick aggregate were better under the same conditions,and the deflections were within the allowable limit of the code.In the design of BFRP reinforced recycled aggregate concrete beam with brick aggregate,the optimization of component performance and cost can be achieved by adjusting the reinforcement ratio.

关 键 词：BFRP筋 再生凝土梁 抗弯性能 配筋率 

分 类 号：TU528.571[建筑科学—建筑技术科学]