BFRP筋增强海水海砂混凝土梁的抗冲击性能  

Impact resistance of seawater sea-sand concrete beams reinforced with BFRP bars

作　　者：朱德举 钟伟霖 徐振钦 刘志健 郭帅成 李安令 ZHU Deju;ZHONG Weilin;XU Zhenqin;LIU Zhijian;GUO Shuaicheng;LI Anling(Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province,College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院绿色先进土木工程材料及应用技术湖南省重点实验室,长沙410082

出　　处：《振动与冲击》2023年第14期220-228,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金山东联合基金项目(U1806225);湖南省高新技术产业科技创新引领计划项目(2020GK2079);山东省科技型中小企业创新能力提升工程项目(2021TSGC1175)。

摘　　要：为研究玄武岩纤维增强复合材料(basalt fiber reinforced polymer,BFRP)筋增强海水海砂混凝土(seawater sea-sand concrete,SSC)梁的抗冲击性能,利用落锤冲击装置研究了不同冲击能量(1818 J,2727 J,3636 J,4848 J)作用下,不同混凝土强度(30 MPa,50 MPa)和配筋率(0.23%,0.48%)的BSFP-SSC梁冲击响应,并测试了冲击后梁的残余承载力。结果表明,随着冲击能量的增加,BFRP-SSC梁的破坏模式由弯曲破坏转变为剪切破坏,梁的残余承载力系数逐渐降低。提高配筋率或海水海砂混凝土强度,均可有效降低梁的最大跨中位移,提升初始峰值冲击力和抗冲击性能。该研究可为BFRP筋增强海水海砂混凝土梁的抗冲击设计提供重要依据。In order to study the impact resistance of seawater sea-sand concrete(SSC)beams reinforced with basalt fiber reinforced polymer(BFRP)bars,the impact responses of the BFRP-SSC beams with different reinforcement ratios(0.23%,0.48%)and concretes strengths(30 MPa,50 MPa)were tested by using a drop-hammer impact equipment under different impact energies(1818 J,2727 J,3636 J,4848 J),and the residual load-carrying capacity of the beams was also tested after impact.The experimental results indicate that the failure mode of the BFRP-SSC beams changes from bending failure to shear failure with the increase of impact energy,and the residual load-carrying capacity factor decreases gradually.Increasing the reinforcement ratio or seawater sea-sand concrete strength can effectively decrease the maximum midspan deflection of the beams,and increase the initial peak impact force and impact resistance performance.The study serves as an important reference for the impact resistance design of the BFRP-SSC beam.

关 键 词：玄武岩纤维增强复合材料(BFRP)筋 海水海砂混凝土梁(SSC) 低速冲击 动态冲击性能 冲击损伤 

分 类 号：TU377.9[建筑科学—结构工程]