Browsing by Author "Yambay Guano Dolores"

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    Evaluación estructural de un puente en el sector Yaguana del cantón Quijos.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas., 2025) Yambay Guano Dolores; Cañizares Ortega Freddy Fernando
    The present study focused on the analysis and structural reinforcement of the bridge over the Yahuana River, which presented critical problems due to deformations, cracks and corrosion in its structure. The initial inspection revealed that the most affected girder suffered a complete torsion due to soil saturation after heavy rains, which caused deformations in the bracing and diagonals. In addition, cracks were observed in the bridge slab, causing corrosion in the reinforcement due to water infiltration. These problems were aggravated by the reduction of the minimum clearance of the bridge, compromising its safety and functionality. Analysis of both dead and live loads identified that the main girders had critical web slenderness, which made them susceptible to buckling under high loads. The maximum bending and torsional moments, as well as the vertical displacements, exceeded the regulatory limits established by AASHTO, which highlighted the need for structural strengthening. After the implementation of the strengthening, a significant improvement in the structural response of the bridge was observed. Vertical displacements were reduced by 71.16%, bending moments by 66.31% and torsional moments by 69.48%. These results confirmed that the proposed strengthening was effective in improving the stability and strength of the bridge, complying with the limits established by the AASHTO standards. The study demonstrated that the reinforcement by means of reinforcing plates in the web of type I girders is a viable solution to correct structural deficiencies in bridges with slenderness and buckling problems. In addition, it highlights the importance of performing detailed inspections and structural analysis to ensure the safety and functionality of critical infrastructure. Finally, it is recommended to implement a regular monitoring and maintenance program, as well as to improve the drainage system around the bridge to prevent future problems related to water infiltration and ground instability.