硅酸盐通报2025，Vol.44Issue(5)：1703-1716,14.DOI:10.16552/j.cnki.issn1001-1625.2024.1141
钢-连续纤维复合筋珊瑚混凝土单向板受弯性能研究
Flexural Performance of Coral Concrete Unidirectional Slabs Reinforced by SFCB
摘要
Abstract
Steel-FRP composite bar(SFCB)has the advantages of both steel bars and fiber-reinforced polymer(FRP),and its excellent corrosion resistance can be combined with coral concrete,which has a good application prospect in the development of islands in the distant sea.In order to study the flexural mechanical properties of coral concrete unidirectional slabs reinforced by SFCB,six unidirectional plate specimens were subjected to static monotonic flexural loading test with varying parameters such as the steel bar type,longitudinal reinforcement ratio and concrete type.The failure process and morphology of the unidirectional slab under force were observed,the flexural moment-deflection curves and material strain distribution of the entire force process were obtained,and the influence of variation parameter on the flexural performance of the unidirectional slabs was analyzed.The results show that the failure mode of the SFCB specimen is similar to that of the ordinary steel specimen,which belongs to the flexural failure of normal cross-section,and has stronger bending stiffness after concrete cracking,the crack development is effectively limited.Compared with odinary steel specimen,the ultimate flexural moment is increased by 8.4％,but the ductility is reduced by 12.7％.The bending stiffness and bearing capacity of SFCB specimens decrease with the decrease of reinforcement ratio,but the ductility is improved,with a maximum increase of 71.2％.The surface porousness,micro-pumping effect and brittleness of coral aggregate lead to higher bearing capacity and poor deformation ability of SFCB coral concrete slab specimen,but its failure form is similar to that of ordinary concrete slab specimen.Finally,based on the assumption of flat cross-section,the formulas for calculating the ultimate flexural moment of concrete unidirectional slabs reinforced by SFCB are derived,and the calculated values are in good agreement with the test values.关键词
钢-连续纤维复合筋/珊瑚混凝土/单向板/受弯性能/承载力计算Key words
SFCB/coral concrete/unidirectional slab/flexural performance/calculation of bearing capacity分类
建筑与水利引用本文复制引用
梁莹,覃伟恒,陈宗平,李志彬..钢-连续纤维复合筋珊瑚混凝土单向板受弯性能研究[J].硅酸盐通报,2025,44(5):1703-1716,14.基金项目
国家自然科学基金(51578163) （51578163）
中央引导地方科技发展资金资助项目(桂科ZY21195010) （桂科ZY21195010）
八桂学者专项([2019]79号) （[2019]79号）
广西大学对口支援学科建设项目(2023N01) （2023N01）
广西高校中青年教师科研基础能力提升项目(2024KY1885) （2024KY1885）
