Abstract
This paper presents experimental results analyzing the flexural behavior of a 30-year-old reinforced concrete bridge that was dismantled for replacement. The results revealed that the beam underwent three main phases: elastic, cracking, and failure, with a maximum load capacity of 226 kN. The primary failure mode was flexural, characterized by concrete crushing in the compression zone, yielding of the tensile reinforcement, and crack widening up to 1.2 mm. Simultaneously, a numerical model using ATENA software was developed to specifically analyze the flexural behavior of the beam and compare it with experimental results. These results provide important quantitative data for assessing load-bearing capacity and proposing effective repair and strengthening solutions.
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