Dynamic increase factors, reinforced concrete

Dynamic Strength. The dynamic design strengths for steel reinforcing and concrete are equal to their static design strengths times the appropriate Dynamic Increase Factor (DIF). 

Table I. Dynamic Increase Factors (DIF) for Reinforced Concrete...

Values for dynamic increase factors are presented in a variety of references although most are based on the same data source. Additional data has been produced in various test programs but has not been assembled into a central source. Much of the data that has been published is based on high strain rate tests and many of the recommended values are arbitrarily chosen. Table 5.A.1 provides recommended DIFs for reinforced concrete and masonry and Tabic 5.A.2 contains values for structural steel, cold-formed steel and aluminum. 

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