Nghiên cứu ảnh hưởng cùa tốc độ biến dạng đến hệ số tăng động DIF của bê tông sử dụng trong xây dựng công trinh ngầm
- Authors: Dang Van Kien, Vo Trong Hung
Affiliations:
Hanoi University of Mining and Geology
- *Corresponding:This email address is being protected from spambots. You need JavaScript enabled to view it.
- Received: 10th-June-2020
- Revised: 26th-May-2020
- Accepted: 10th-June-2020
- Online: 30th-June-2020
- Section: Underground and Mining Construction
Abstract:
The dynamic increase factor (DIF), i.e. the ratio of the dynamic to static strength, is normally reported as function of strain rate. Knowledge of the DIF is of significant importance in the design and analysis of structures for explosives safety. DIF curves for concrete are typically based on limited data. This data support the dynamic increase factor (DIF) being a bilinear function of the strain rate in a log-log plot. From the results of dynamic experiments SHPB on concrete, this study also formulated an approximate formula to determine the approximate DIF value according to the strain rate with the groups of static compressive strength M300, M400 and M600.
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