Experimental Tests on Fibers Influence on the Size Effect on Shear - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 83

Fig. 5.11 Formworks and beams just casted

reached peak loads well below those of the rst shear cracking, reaching 30, 40 and

50 kN for beams H500, H1000 and H1500, respectively.
Figure 5.12 shows the test arrangement of the beams. To prevent movement out
of plane of the beams, H1000 and H1500 steel pro

les were arranged around the

beam ends.
Instrumentation was available to measure: de ections, shear cracks widths,

settlement of supports, shortening of top chord and elongation of bottom chord.
Linear Variable Differential Transformers (LVDTs) were utilized for measuring
de

fl

ections at midspan (front and back side) and support displacements. Potentio-
metric transducers were employed for measuring crack widths and strut shorten-
ings. The latter were placed with an inclination of 40

fl

° (struts) and 140 ° (crack

screw jack

steel plate and layer
of mortar at load point
spec imen to be tested

load cell

supp o rt

Fig. 5.12 Three point test setup for the full-scaled beams