大变形时温度和应变率对沥青混凝土动态力学性能的影响  

Effects of Temperature and Strain Rate on Dynamic Mechanical Properties of Asphalt Concrete with Finite Deformation

作　　者：项笑炎[1,2,3] 张春晓[3] 何翔[3] 王武[3] 张磊[3] 

机构地区：[1]河海大学岩土工程研究所,南京210098 [2]河海大学土木与交通学院,南京210098 [3]总参工程兵科研三所,洛阳471023

出　　处：《武汉理工大学学报》2012年第11期72-77,共6页Journal of Wuhan University of Technology

摘　　要：利用大直径分离式霍普金森压杆(SHPB)研究了沥青混凝土在不同温度下高应变率的动态力学性能。结果表明,应变率越高、温度越低时沥青混凝土动力强度越高。高应变率的应力应变曲线存在明显强度退化。沥青混凝土力学性能具有时温等效性,提高实验温度和减小应变率效果相当。The large diameter split Hopkinson pressure bar （SHPB） experiment was carried out for the dynamic prop erties of asphalt concrete with high strain rate under different temperatures. The experimental results indicate that the dy namic strength of asphalt concrete increased with the increase of strain rate and the decrease of temperature. The stress strain curves have the distinct strength degradation under high strain rate. The mechanical properties of asphalt concrete indicate the rate temperature equivalence. The increase of temperature and the decrease of strain rate have the equivalent effect.

关 键 词：SHPB 沥青混凝土 应变率效应 温度效应 应变软化 

分 类 号：F403.3[经济管理—产业经济]