STRUCTURAL ASSESSMENT OF A BRIDGE ON THE SPONDYLUS ROUTE IN ECUADOR

Abstract

In this project, the methodology for existing bridges "Load and Resistance Factor Rating" (LRFR) of the Bridge Evaluation Manual published by AASHTO is applied, in order to adapt it to the conditions imposed by Ecuadorian road regulations. The bridge is made of reinforced concrete and is located on Ruta del Spondylus to the southeast of Pedernales, in Ecuador. It was built in 1986 when other vehicle loads and construction regulations existed. Through a visual inspection, an acceptable degree of deterioration was detected in its structure, in this way its condition is qualitatively qualified. For the verification, the calculation of the solicitations to which the different structural members will be subject was carried out, considering their different static and dynamic effects. The calculation of the real resistance considered the verification of the beams, slabs and diaphragms of the superstructure and piers and abutments of the substructure. An analytical model was developed in the CSI Bridge software, where the design load effects were determined, in addition to the fundamental period and the behavior it will have in the face of a seismic event. Finally, the "RF" capacity indices are determined in the sections that were expected to act on the greatest solicitations of the possible combinations of loads in force in the Ecuadorian regulations. It is concluded that the elements of the superstructure and the abutments have a greater degree of affectation with possible flexural failure, so they must be reinforced. Batteries have the highest rated capacity and can withstand any combination of loads.