橡胶混凝土断裂性能试验研究  

Experimental study on the fracture characteristics of crumb rubber concrete

作　　者：曹国瑞 王娟[2] 卿龙邦 杨朝霞[2] 姜军 Cao Guorui;Wang Juan;Qing Longbang;Yang Zhaoxia;Jiang Jun(College of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,P.R.China;College of Water Conservancy and Environment Engineering,Zhengzhou University,Zhengzhou 450001,P.R.China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]郑州大学水利与环境学院,郑州450001

出　　处：《土木建筑与环境工程》2018年第6期91-97,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：长江水利委员会长江科学院开放研究基金(CKWV2017517/KY);河南省高等学校重点科研项目计划(15A570010)~~

摘　　要：开展了橡胶混凝土三点弯曲梁断裂试验,获得了不同试件尺寸和橡胶掺量下的裂缝断裂全过程曲线,对橡胶混凝土断裂能GF及裂缝扩展K-R阻力曲线进行研究。基于数字图像相关方法,获得了橡胶混凝土试件垂直于裂缝扩展方向的全场位移和应变信息,对裂缝扩展的损伤断裂演化过程进行研究。结果表明:随试件尺寸增加和橡胶掺量提高,断裂能均呈现出上升趋势;K-R阻力曲线随试件尺寸变化表现出明显尺寸效应,橡胶掺量在0%~14%设计范围内时,K-R阻力曲线与橡胶掺量无关。Based on the three-point bending beam fracture tests on the crumb rubber concrete with different specimen geometries and rubber volumes,the experimental curve of the whole fracture crack process was obtained,and the fracture energy and K-R resistance curve were studied.Through the digital image correlation method,the whole field displacement and strain distribution perpendicular to the direction of crack propagation were determined,from which the crack propagation and evolution process of fracture and damage can thus be examined.The results indicate that the fracture energy displays an increasing tendency with specimen geometry and rubber volume.The K-R resistance curve reveals the size effect by change of specimen geometries and shows no indicative relationship with 0%~14%rubber volume which was designed in this study.

关 键 词：橡胶混凝土 断裂能 K-R阻力曲线 数字图像相关 裂缝扩展过程 

分 类 号：TU528.1[建筑科学—建筑技术科学]