水力发电学报2024，Vol.43Issue(8)：56-63,8.DOI:10.11660/slfdxb.20240806
沥青混凝土起裂韧度试验研究
Experimental study on initial fracture toughness of asphalt concrete
摘要
Abstract
Semi-circular bending(SCB)fracture tests on asphalt concrete were conducted in this study,and load-crack opening displacement curves of its crack propagation process were obtained.We examine the effects of temperature,loading rate,and initial crack length on its initial fracture toughness,using the steep drop method of linear correlation coefficients;a digital image correlation method was used to study its damage and deformation characteristics at the stages of crack initiation and crack propagation.Research findings show that at the damage position,the initial cracking load obtained using this steep drop method is within the ranges of experimental load,verifying the rationality of the method in studying the initial fracture toughness.This toughness decreases gradually with the temperature and initial crack length,while increases with the loading rate.关键词
沥青混凝土/起裂韧度/数字图像相关方法/裂缝扩展/起裂荷载Key words
asphalt concrete/initial fracture toughness/digital image correlation method/crack propagation/initial cracking load分类
建筑与水利引用本文复制引用
曹国瑞,卿龙邦,刘天云,陈礼彪,曾俊铖..沥青混凝土起裂韧度试验研究[J].水力发电学报,2024,43(8):56-63,8.基金项目
国家自然科学基金资助项目(51779069 （）
52066027) （）
福建省科技重大专项资助(2021HZ026010) （2021HZ026010）
