Evaluación de la rigidez a flexión de puentes de viga y losa en concreto presforzado a partir de pruebas de carga. Caso de estudio: Puente La Parroquia vía La Renta - San Vicente de Chucurí

The work presented is part of an investigation project conducted by an inquiry group of new materials and structures, which is focused on the load test study for pre-stressed concrete bridges, typology slab-beam which its span is approximately between 30 meters, it was built by the existing regulations about 30 years ago in Colombia. The bridge that is being studying is located in the Santander department between Bucaramanga City and San Vicente del Chucurí Municipality. La Parroquia bridge analysis is presented through the elaboration of a numerical model which was fitted with the static load test done. The methodology used for the load analysis of each studied bridges, it is configured by expressing over the structure a consistent operation set in the reproduction of one or more load states on the same, in order to determine behavior aspects when they are being subjected by solicitations which produce them their maximum stress state. At the end, the obtained results are translated into getting results that verify the bearing load on the structure validating and calibrating a three-dimensional finite element model of the bridge. Where the final data allow to reduce considerably the uncertainties related to mathematical modeling and also, they will identify the structural current state to get an objective criteria to issue an opinion on its structural safety. In response to the calibration, a numerical model is obtained, which presents an approximate behavior of the structure analyzed against static gravitational loads. It determines that the geometrical properties of the structural elements have a significant influence on the flexural rigidity of pre-stressed concrete bridges.KEYWORDS:Beam and slab bridge, Bending, Calibration, Load testing, Prestressed concrete, Stiffness.1.INTRODUCCIÓNDentro del marco del proceso investigativo desarrollado por el grupo de Investigación en Nuevos Materiales y Estructuras de Construcción (INME), adscrito a la Universidad Industrial de Santander (UIS), se identificó la oportunidad de generar un proyecto enfocado al estudio del comportamiento de puentes de hormigón postensado, tipo viga y losa, en servicio; las metodologías de evaluación de características dinámicas y estructurales; y las técnicas de rehabilitación. Lo anterior, aprovechando las circunstancias generadas por el desarrollo de un proyecto energético en la región. Como consecuencia de la construcción de la represa del proyecto hidroeléctrico HidroSogamoso, se h