Considerações sobre prova de carga em estruturas de concreto

Abstract

(NBR 9607-1986), American Code (ACI 318-2002), Australian Code (AS 3600-2001), Spanish Recommendations (EHE-1998) and European Recommendations (Rilem TBS-2-1984

Proof Load Test on Bridges and Viaducts: A Bibliography Analysis

“…In this way Oliveira and Junior [8] recommends the proof load test, a more efficient load test, to verify the safety of a construction already concluded. Still, according the authors, load tests are not always made in Brazil, due to the fact if reinforced concrete structures are made according the design and used materials were approved on quality control tests, it is admitted the automatic acceptance of the structure.…”

“…In the case of existent road construction, Oliveira [3] highlight that exist situations that structures, such as bridges and viaducts, can be submitted to loads above the predicted on design, being indispensable the evaluation of a proof load test to analyze the structure and avoid its failure. The author also suggest that, on new constructions, the proof load test and only after the analysis of results, the construction would be accepted or not, whereas in these cases, the proof load test must verify the static and dynamic behavior of constructions, and gauge structure strength under load.…”

“…Considering Oliveira [3], another form to achieve these tests, in cases of bridges with large spans and unusual structures which does not accomplish design specifications relative to repetitive loads, is producing short term oscillations, permitting to determine the vibration period under load.…”

“…According Oliveira [3], the main international regulation for load test on reinforced concrete structures are the American Standard ACI 318 [12], Australian Code AS 3600 [13], Spanish recommendation [9], European Recommendation RILEM TBS [14] and, in Brazil, Brazilian Code ABNT NBR 9607 [6].…”

“…Proof load test is a very efficient test to analyze the stability of a concluded construction, once it is analyzed the structural behavior on service conditions. Besides, Oliveira [3] recommends this test should be done on new structures, serving as a parameter for structures acceptance.…”