废弃轮毂纤维混凝土单轴受压下本构关系研究  

Study on Constitutive Relationship of Waste Hub-Fiber Concrete Under Uniaxial Compression

作　　者：杨俊[1] 向丰靖 王乾峰[1] 袁晓露[1] 李元丰 YANG Jun;XIANG Fengjing;WANG Qianfeng;YUAN Xiaolu;LI Yuanfeng(College of Civil Engineering&Architecture,China Three Gorges Univ.,Yichang 443002,China;Hubei Road and Bridge Group Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002 [2]湖北省路桥集团有限公司,武汉430056

出　　处：《三峡大学学报（自然科学版）》2021年第3期54-59,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金青年科学基金项目(51709155);湖北省教育厅科学研究计划项目(D20191201);宜昌市应用基础研究项目(A19-302-09)。

摘　　要：通过对轮毂纤维体积分数掺量分别为0.0%、0.5%、1.0%、1.5%、2.0%的轮毂纤维混凝土进行单轴受压实验,得到同一应变率下混凝土应力-应变曲线.在废弃轮毂纤维掺量增加的同时,废弃轮毂纤维混凝土的应力-应变峰值均有所增加,达到峰值后均存在应变软化现象.以此试验结果为基础,提出了兼顾混凝土非线性应变效应和轮毂纤维增强效应的轮毂纤维混凝土本构关系,并通过试验曲线拟合得到相应拟合参数,结果表明该本构方程对试验曲线拟合效果良好.借助拟合曲线进行整体对比分析,再次说明了轮毂纤维的增韧效果明显.Through uniaxial compression experiments on hub-fiber concrete with volume fraction of 0.0%,0.5%,1.0%,1.5%and 2.0%,the stress-strain relationship curves of concrete with different hub-fiber content at the same strain rate were obtained.With the increase of volume rate of abandoned wheel hub fiber,the peak stress and peak strain of concrete increase to a certain extent,and the strain softening phenomenon occurs after the peak value.Based on the test results,the constitutive relation of hub-fiber concrete considering the nonlinear strain effect of concrete and the strengthening effect of hub fiber is proposed.By means of the fitting curve,the overall comparative analysis of hub-fiber concrete is carried out,which further indicates that the effect of strengthening toughness of hub-fiber is obvious.

关 键 词：轮毂纤维 混凝土 本构关系 增强增韧 

分 类 号：TU502.06[建筑科学—建筑技术科学]