Estudio patológico del puente PVE077 UF10 vía nacional Buenaventura - Buga

Abstract

This study evaluates the condition of the reinforced concrete structure (beams and deck) of vehicular bridge UF10-E077, located in the Loboguerrero, Dagua district, Valle del Cauca, with de objective of evaluating the structural condition and proposing intervention alternatives. The methodology included a visual inspection to identify pathologies, analysis of laboratory tests carried out by the road concession in 2023, the proposal of additional tests to assess the current condition of the structure, a vulnerability analysis, and an intervention proposal. The identified pathologies include moisture, depositary grime, honeycombing in concrete, loss of concrete cover, steel oxidation, corrosion of the reinforcement due to oxidation, efflorescence, as well as animal and vegetal contamination. The laboratory results indicate that the beams exhibit a compressive strength below 16 MPa, the yield strength of the steel is 235 MPa, and the corrosion potential of the reinforcement ranges between -200 mV and -300 mV, which corresponds to an active–passive transition state. Furthermore, through a structural modeling in SAP2000, it was verified that the slab and beams do not meet the load-bearing capacity required by CCP-14. Finally, the analysis concluded that the structure presents a high seismic vulnerability. The intervention includes the repair of honeycombing, waterproofing treatment of concrete, crack sealing, application of rust converter, cleaning, drainage improvement, and structural strengthening of the deck and beams in order to restore their capacity. The study also includes a four-month schedule and a budget of $12,813,000 for the execution of the complete pathological assessment. It is concluded that the structure requires immediate intervention, as it has already lost its structural capacity