钢纤维/玻璃纤维增强橡胶混凝土动态劈裂拉伸性能研究  

Dynamic splitting tensile properties study on steel fiber and glass fiber reinforced rubber concrete

作　　者：李靖滨 武献鹏 罗文华 刘锋[2] 武念铎 LI Jingbin;WU Xianpeng;LUO Wenhua;LIU Feng;WU Nianduo(China Railway Construction Group Second Engineering Co.,Ltd.,Guangzhou 511455,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China;China West Construction Group 4th(Guang Dong)Co.,Ltd.,Guangzhou 511498,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]中铁城建集团第二工程有限公司,广州511455 [2]广东工业大学土木与交通工程学院,广州510006 [3]中建西部建设集团第四(广东)有限公司,广州511498 [4]中国建筑第八工程局有限公司,上海200135

出　　处：《建筑结构》2025年第5期55-61,15,共8页Building Structure

基　　金：国家自然科学基金面上项目(12072080)。

摘　　要：橡胶混凝土是一种将废弃轮胎掺入混凝土中的新型绿色建筑材料。相比于传统混凝土,橡胶混凝土具有更优的韧性、抗冲击能力、耗能能力及隔音隔热性能,但橡胶混凝土的劈裂抗拉性能往往低于传统混凝土。因此在橡胶混凝土中掺入刚性纤维(钢纤维)及柔性纤维(玻璃纤维),对动态劈裂试验的试样破坏模态进行了分析,并对巴西圆盘劈裂试验进行过载修正以获得更真实的试验结果,分析动态应变率的影响以及能量耗散性能。结果表明,钢纤维及玻璃纤维的复掺可以发生协同效应,其原因为玻璃纤维和钢纤维分别在混凝土破坏过程中的微裂缝产生阶段和微裂缝扩展至宏观裂缝生成阶段起到了抑制作用。Rubber concrete is a novel green building material that reuses discarded tires adding into concrete.Compared to traditional concrete,rubber concrete exhibits superior toughness,impact resistance capacity,energy absorption capacity,and sound thermal insulation properties.However,the splitting tensile strength of rubber concrete is often lower than that of traditional concrete.Therefore,rigid fibers(steel fibers)and flexible fibers(glass fibers)were added into rubber concrete.An analysis of the failure modes of specimens in dynamic splitting tests was conducted.Additionally,overload corrections were applied to the Brazilian disc splitting tests to achieve more realistic experimental results,and the effects of dynamic strain rates and energy dissipation properties were analyzed.The results indicate that the hybrid incorporation of steel fibers and glass fibers leads to a synergistic effect.This is attributed to the inhibitory effects of glass fibers and steel fibers during the micro⁃crack formation stage and the micro⁃crack propagation to macro⁃crack generation stage in the concrete failure process respectively.

关 键 词：橡胶混凝土 纤维增强 动态劈裂拉伸 动态应变率 能量耗散 

分 类 号：TU528.57[建筑科学—建筑技术科学]