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QA/QC, Quality Control Engineer, CPM Consulting , Belgrade , Serbia
This paper presents the full-scale static tensile factory acceptance testing of the OVM.ST15-47 parallel-strand hanger system intended for installation on the New Sava Bridge in Belgrade, Serbia. Each tested hanger assembly consisted of 47 seven-wire prestressing strands, with a nominal tensile strength of 1,860 MPa and a nominal cross-sectional area of 150 mm² per strand, together with the associated anchorage and fork components. Two representative full-scale hanger specimens were subjected to a predefined staged loading procedure, including a 60-minute load-holding period at 0.8 of the guaranteed ultimate tensile strength (GUTS), followed by loading to the governing acceptance force. The required acceptance force was defined as the greater of 95% GUTS and 92% of the calculated actual ultimate tensile strength (AUTS) of the 47-strand bundle. Both specimens exceeded the governing force and minimum elongation requirements. No damage to specimens and no failure of anchorage-system components were observed after the loading procedure. The results demonstrate that both tested hanger assemblies satisfied the specified static tensile acceptance criteria.
arch bridge, bridge hanger, parallel-strand system, full-scale testing, factory acceptance testing, static tensile test, anchorage system
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