Experimental and numerical analysis of three-point bending fracture of pre-notched asphalt mixture beam

被引：34
作者：
Gao, Hu [1 ]
Yang, Xinhua [1 ,2 ]
Zhang, Chuanchuan [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Civil Engn & Mech, Wuhan 430074, Peoples R China
[2] Hubei Key Lab Engn Struct Anal & Safety Assessmen, Wuhan 430074, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 90卷
基金：
中国国家自然科学基金;
关键词：
Three-point bending fracture; Asphalt mixture; Image processing technique; Discrete element method; INTERFACE ELEMENTS; RANDOM PACKING; SIMULATION; CONCRETE; GRADATION;
D O I：
10.1016/j.conbuildmat.2015.04.047
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The experiments are combined with the discrete element simulations to investigate the three-point bending fracture of pre-notched asphalt mixture and evaluate the effects of aggregate distribution and pre-notch dislocation on fracture. Compared with aggregate distribution, pre-notch location is a more important effect factor for the crack path. The crack-path deviation angle, the critical fracture load, and the critical fracture displacement generally increase with the increasing pre-notch offset. The three-point bending fracture of asphalt mixture is of Mode I and induced by high normal contact force concentration. Due to some random factors and the narrow limitation of 2D simulations, two discrepancies are also found in the crack-path deviation angle and the critical fracture load. (C) 2015 Elsevier Ltd. All rights reserved.
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收藏
页码：1 / 10
页数：10
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