硅酸盐通报2026，Vol.45Issue(6)：1937-1946,10.DOI:10.16552/j.cnki.issn1001-1625.2025.1156
基于SHPB与直剪装置的UHPC力学性能试验研究
Experimental Study on Mechanical Properties of UHPC Based on SHPB and Direct Shear Apparatus
摘要
Abstract
In practical engineering,concrete structural members are subjected not only to compressive loads but also frequently to tensile and shear loads.Therefore,investigating the mechanical behavior of ultra-high performance concrete(UHPC)under various stress states and loading rates is crucial for structural safety design.In this study,quasi-static and dynamic compression,splitting tensile,and shear tests were performed on UHPC with and without steel fibers,utilizing a universal testing machine,a split Hopkinson pressure bar(SHPB),and a self-designed direct shear apparatus.The results indicate that the incorporation of steel fibers significantly enhances the mechanical properties of UHPC under both quasi-static and dynamic conditions.Furthermore,both types of specimens(UHPC with and without steel fibers)exhibit a significant strain rate hardening effect.Specifically,in the shear tests,although the presence of steel fibers and high strain rates alter the evolution characteristics of peak stress,they do not alter the failure mode,which remains as mixture fractures of type I and type II.关键词
超高性能混凝土/分离式霍普金森压杆/直剪装置/动态压缩/动态劈拉/动态剪切Key words
ultra-high performance concrete/split Hopkinson pressure bar/direct shear apparatus/dynamic compression/dynamic splitting/dynamic shearing分类
建筑与水利引用本文复制引用
杨恒,李萌萌,陈江瑛..基于SHPB与直剪装置的UHPC力学性能试验研究[J].硅酸盐通报,2026,45(6):1937-1946,10.基金项目
宁波市科技创新2025重大项目(2022Z209) （2022Z209）
国家自然科学基金(11572163,11832013) （11572163,11832013）
