Dynamic Behavior of Concrete: Experimental Aspects - Dynamic Behavior of Concrete and Seismic Engineering - page 44

a) Opening rate 0.15 μm/s b) Mean opening rate 2.8 m/s

Figure 1.22a and b. Direct traction characterization tests on very high performance
concrete, at low and high rate, on pre-slotted specimens. Direction C specimens.
High efficiency of the fibers (from [TOU 99b])

Quasi-static reference
value
(0.05 MPa/s)
in MPa

Variation with speed
in MPa/u. log.

Traction strength 8 + 0.8

eq. 1 mm threshold stress 7 + 0.5

Young's modulus 52,000 env. + 450

Table 1.1. Calculation characteristics for very high performance
concrete containers, derived from the traction characterization
(“rounded off” values used for calculation) (from [TOU 99b])