混杂纤维高性能轻骨料混凝土对称倾角梁抗剪性能试验研究  

Experimental study on shear performance of symmetrical inclined beams with hybrid fiber high performance lightweight aggregate concrete

作　　者：尤志国 褚艳敏 李杰 毛小勇 周云龙 YOU Zhiguo;CHU Yanmin;LI Jie;MAO Xiaoyong;ZHOU Yunlong(Institute of Intelligent Manufacturing and Smart Transportation,Suzhou City University,Suzhou 215104,China;College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]苏州城市学院智能制造与智慧交通学院,江苏苏州215104 [2]华北理工大学建筑工程学院,河北唐山063210

出　　处：《广西大学学报(自然科学版)》2025年第1期28-37,共10页Journal of Guangxi University(Natural Science Edition)

基　　金：河北省自然科学基金项目(E2021209121);河北省教育厅科技重点项目(ZD2020139);苏州城市学院科研启动基金项目(5010702824);唐山市应用基础研究计划项目(23130214E)。

摘　　要：为了研究不同纤维组合对轻骨料混凝土对称倾角梁的抗剪性能的影响,对7根混杂纤维高性能轻骨料混凝土对称倾角梁进行抗剪性能试验研究,并利用ABAQUS有限元软件进行数值模拟以验证其可性行。结果表明:混杂纤维可以提高试验梁的抗剪性能,混杂钢纤维、仿钢纤维与聚丙烯短纤维具有正混杂效应。混杂纤维的加入有效抑制裂缝的产生与发展,明显提高对称倾角梁的极限荷载。三元混杂钢纤维、仿钢纤维和聚丙烯短纤维梁的抗剪性能优于二元混杂钢纤维和聚丙烯短纤维的梁。经研究得出二元混杂钢纤维和聚丙烯短纤维的梁中最优纤维组合分别为50、1 kg/m^(3),三元混杂钢纤维、仿钢纤维和聚丙烯短纤维的梁中最优纤维组合分别为40、3、0.7 kg/m^(3)。To investigate the influence of different fiber combinations on the shear performance of lightweight aggregate concrete symmetrical inclined beams,experiments on seven hybrid fiber high-performance lightweight aggregate concrete symmetrical inclined beams were conducted.Feasibility verification of numerical simulation was carried out by using ABAQUS finite element software.The study indicates that hybrid fibers can enhance the shear performance of the test beams,and the hybridization of steel fibers,imitation fibers,and polypropylene short fibers shows a positive hybrid effect.The addition of hybrid fibers effectively suppresses the generation and propagation of cracks,significantly increasing the ultimate load of symmetrical inclined beams.The shear performance of ternary hybrid steel fibers,imitation fibers,and polypropylene short fibers beams is superior to that of binary hybrid steel fibers and polypropylene short fibers beams.The optimal fiber combination for binary hybrid steel fibers and polypropylene short fibers beams is determined to be 50 kg/m^(3) and 1 kg/m^(3),respectively,while for ternary hybrid steel fibers,imitation fibers,and polypropylene short fibers beams,the optimal fiber combination is found to be 40 kg/m^(3),3 kg/m^(3) and 0.7 kg/m^(3),respectively.

关 键 词：混杂纤维 轻骨料 抗剪性能 数值模拟 极限荷载 

分 类 号：TU375.1[建筑科学—结构工程]