混凝土压缩性对SHPB试验中惯性效应的影响  

THE INERTIA EFFECT OF THE COMPRESSIBLE CONCRETE MATERIAL TESTS IN SHPB SYSTEM

作　　者：陈滔[1] 李庆斌[1] 管俊峰[2] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]华北水利水电学院土木与交通学院,郑州450011

出　　处：《固体力学学报》2013年第5期515-520,共6页Chinese Journal of Solid Mechanics

基　　金：国家973项目(2013CB035902);国家自然科学基金(90715041和51209094);华北水利水电学院高层次人才科研启动项目(201064)资助

摘　　要：惯性效应是造成大尺寸的SHPB试验中混凝土试件应力不均匀和多轴性的主要原因.论文分析了SHPB试验中的惯性效应规律,给出了可考虑混凝土压缩性的改进Gorham惯性效应公式.进一步结合SHPB系统混凝土试验的加载过程,利用改进公式对试验进行了计算分析,与试验比较结果表明:建议的惯性效应改进公式对实际混凝土SHPB试验的考虑更为合理和全面.The inertia effect is one of the main sources leading to the stress nonuniformity and triaxial stress state in a concrete test utilizing the large-sized SHPB system.An improved Gorham＇s inertia correction formula which could reflect the compressibility was derived in the light of a theoretical analysis on the regulation of the inertia effect.The improved formula was analyzed and validated by calculating the inertia stress based on the actual dynamic loading process of several concrete material tests.The results show that the improved formula is more comprehensive and reasonable for the consideration of the inertia effect.

关 键 词：SHPB 惯性效应 混凝土 可压缩性 动态试验 

分 类 号：TU528[建筑科学—建筑技术科学]