2010•Journal of Jiaxing UniversityRequires access

Study on Quasi-static and Dynamic Concrete Specimens Compressive Test

Dong Xin-long

Abstract

In this study,dynamic compressive tests with 70mm C60、C100 concrete specimens were carried out on a 74mm conic variable cross-sectional SHPB,compared with quasi-static compressive tests on a MTS810 electro-hydraulic servo-controlled testing machine. The result indicates that compressive strength,dynamic increase factor (DIF) and the ratio of dynamic strain to quasi-static strain all have tendency of ascending with the increasing of strain rates. When in the same strain rate,the higher compressive strength concrete is higher than the lower strength compressive concrete in the increasing rate of compressive strength. And concrete specimens also have different forms in cracks extending with different strain rates. Furthermore,the mechanism of strain rate effect is also studied.

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Key concepts: Compressive strength, Strain rate, Materials science, Universal testing machine, Composite material, Dynamic testing, Structural engineering, Strain (injury)