Dynamic Mechanical Property of Hybrid Fiber Reinforced Concrete(HFRC)  

作　　者：任志刚 徐卫国 

机构地区：[1]School of Civil Engineering & Architecture,Wuhan University of Technology [2]Department of Orthopaedics,Tongji Hospital Affiliated to Tongji Medical College,Huazhong University of Science and Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第4期783-788,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Self-determined and Innovative Research Funds of WUT

摘　　要：The uniaxial compressive response of steel-polypropylene hybrid fiber reinforced concrete（HFRC） and steel fiber-reinforced concrete（SFRC） was analyzed under high strain rate loading with a 74 mm diameter split Hopkinson pressure bar（SHPB）.The experimental investigation focused on recorded data and resulted in distinguishing the strain rate that mobilized different ductility of steel-polypropylene hybrid fiber reinforced concrete（HFRC） and steel fiber-reinforced concrete（SFRC）.64 specimens of HFRC and SFRC with higher static compressive strength were tested at the strain rates changing from 20 to 120 s-1.The static compressive strength and dynamic stress-strain curves of the two materials were obtained at 4 different strain rates and the failure stress,and peak strain and peak toughness were also analyzed.The results show that HFRC has quite good dynamic mechanical property and clear strain-rate effect,and the failure mechanism of HFRC and SFRC was also compared based on the specimens＇ failure modes in static and dynamic compressive tests.The uniaxial compressive response of steel-polypropylene hybrid fiber reinforced concrete（HFRC） and steel fiber-reinforced concrete（SFRC） was analyzed under high strain rate loading with a 74 mm diameter split Hopkinson pressure bar（SHPB）.The experimental investigation focused on recorded data and resulted in distinguishing the strain rate that mobilized different ductility of steel-polypropylene hybrid fiber reinforced concrete（HFRC） and steel fiber-reinforced concrete（SFRC）.64 specimens of HFRC and SFRC with higher static compressive strength were tested at the strain rates changing from 20 to 120 s-1.The static compressive strength and dynamic stress-strain curves of the two materials were obtained at 4 different strain rates and the failure stress,and peak strain and peak toughness were also analyzed.The results show that HFRC has quite good dynamic mechanical property and clear strain-rate effect,and the failure mechanism of HFRC and SFRC was also compared based on the specimens＇ failure modes in static and dynamic compressive tests.

关 键 词：HFRC SFRC compression property SHPB strain rate 

分 类 号：TU528.572[建筑科学—建筑技术科学] TQ333.1[化学工程—橡胶工业]