Badanie wzmocnień konstrukcji
Test reinforcement t-joint welds and overlay welds
According to the draft provided for the repair and reconstruction of existing structures to strengthen
the girders by welding designed elements. Designed to strengthen due to present limitations require the use
of specific welded joints, which by definition are with non full penetration.
Designed procedure to explore such strengthens
allows to test these strengthenings with thru-transmission method. The design and shape of the joints preclude the
use of the pulse-echo method. In preparing the test simulations used in the
Method and efficacy studies were validated (checked) in accordance with PN-EN ISO / IEC 17025.
In this case,
it was agreed that the estimated sensitivity of the method of research is comparable to the size of defects
in the equivalent of 4 mm, ie an artificial standard defect in the co compared ultrasonic.
Necessary adaptive and complex and difficult repair to result in the construction joints, which have the
geometry of preventing the application of typical ultrasonic echo testing method. Therefore, the developed
test procedure used in the transmission method based on the standard SFS-EN 583-3. The essence of the procedure
are comparative studies in which test items are accepted or not by the amplitude of the transition from the
detected discontinuities, which are compared with the indication (the amplitude of the transition) at the
artificial defect (reference).
Below shows the simulation results for test of reinforcement, which allowed to choose the correct angles heads
and their optimal arrangement.
geometric arrangement of heads in a non-optimal for the method of transmission.
geometric arrangement of heads in the optimal method of transmission.