建筑结构学报2026，Vol.47Issue(8)：123-133,11.DOI:10.14006/j.jzjgxb.2025.0511
高强珊瑚骨料混凝土梁受剪承载力试验研究与设计方法评估
Experimental study and evaluation of design methods for shear capacity of reinforced high-strength coral aggregate concrete beams
摘要
Abstract
To investigate the shear performance of reinforced high-strength coral aggregate concrete(HSCAC)beams,both experimental and theoretical studies were carried out.A total of eight shear beams were tested,using a three-point loading scheme,to investigate the failure patterns,load-carrying capacity and strain development in reinforcements.The parameters considered for test specimens were shear span-to-depth ratio(1-2.5),grade of concrete strength(C30～C70),area ratio of longitudinal rebars(2.06％-2.55％)and stirrups(0.25％-0.38％).Further,the predictive performances of ACI 318-19 and GB 50010-2010 formulas as well as the simple strut-and-tie model(STM)to calculate the shear capacity were evaluated and compared in detail.The test results identify four failure modes which are found for HSCAC shear beams,including the shear-compression,diagonal compression,shear-flexural and shear-bond failure;the concrete spalling of HSCAC beams with a shear-compression or diagonal compression failure are more severe than ordinary concrete specimen;the shear strength is significantly affected by shear span-to-depth ratio and concrete strength.As for the design methods to determine shear capacity of HSCAC beams,the ACI 318-19 and GB 50010-2010 equations would provide conservative predictions,with an average predicted-to-test shear capacity ratio of 0.31 and 0.56,respectively.Meanwhile,the STM,which only considers the failure of inclined and horizontal struts,could obtain a relatively higher predictive accuracy,with a mean value of predicted-to-test shear capacity ratio of 0.92.Based on the analysis,GB 50010-2010 formula or the STM,simultaneously considering the destruction of tie,inclined and horizontal struts,are suggested for conservative shear design,and the STM,only considering the failure of inclined and horizontal struts,for precise prediction.关键词
高强珊瑚骨料混凝土/拉-压杆模型/受剪试验/受剪性能/受剪承载力Key words
high-strength coral aggregate concrete/strut-and-tie model/shear test/shear behavior/shear strength calculation分类
建筑与水利引用本文复制引用
姚刚峰,刘文渊,付强,于潇,朱磊,蔡新江..高强珊瑚骨料混凝土梁受剪承载力试验研究与设计方法评估[J].建筑结构学报,2026,47(8):123-133,11.基金项目
国家自然科学基金项目(12102476). （12102476）
