3.1.3 Cyclic vertical loading test
(1) Loading
At first the spring unit is deformed horizontally by 0 mm, 30 mm, 42 mm. Then the unit is
dynamically loaded in vertical direction cyclically by a hydraulic jack.
(2) Displacements
At first the spring unit is compressed statically by 40 mm. Then it is vertically loaded by ± 20 mm in
the first cycle, ± 30 mm in the second cycle, ± 40 mm in the third cycle and ± 50 mm in the fourth
cycle.