Please use this identifier to cite or link to this item: https://repositorio.escuelaing.edu.co/handle/001/609
Title: Comportamiento Ante Carga Perpendicular al Plano, de Muros de Mampostería en Concreto, Reforzados con Barras de FRP
Other Titles: Out-Of-Plane Perpendicular Load Behavior, Of Walls Concrete Masonry, Reinforced With FRP Bars
Authors: Otálora Barros, Daniel
Escuela Colombiana de Ingeniería Julio Garavito
Keywords: Mampostería
Fibras Reforzadas con Polímeros FRP
Carga Perpendicular al plano
Issue Date: 2017
Publisher: Escuela Colombiana de Ingeniería Julio Garavito
Abstract: Fiber Reinforced Polymers have emerged since the 1990s as an alternative to reinforcing structures. Have in their favor, high tensile strength, high modulus of elasticity, high corrosion resistance and no conductivity; its design is based on the capacity before gravitational loads and has not yet been accepted to reinforce structures that are subjected to seismic forces. In the USA, the ACI 440 committee specifies the design guidelines related to the internal and external reinforcement of structures, considering the FRP as a material, both in its presentation of bars and bands; this is how ACI Guide 440.1R-15, "Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars" presents the recommendations for the design of new concrete structures with internal reinforcement in FRP bars. On the other hand, in relation to the masonry, the guidebook ACI.440.7R-10 "Guide For The Design And Construction Of Externally Bonded Fiber Reinforced Polymer Systems For Strengthening Unreinforced Masonry Structures" defines the criteria for the design of externally reinforced masonry with bands of FRP; evidencing the nonexistence of a regulation to design reinforced masonry internally with FRP bars. Given the gap found in the international ACI guidelines regarding the use of FRP rods as internal reinforcement of masonry walls and given the wide advantages that would be offered, a macro experimental program was generated, where an initial investigation would be carried out initially to evaluate the load capacity perpendicular to the plane of masonry walls reinforced internally with FRP bars and to generate a preliminary design protocol to evaluate the theoretical capacity of these walls, based on the requirements specified in: ACI 440.1R-15 and The code that specifies the requirements for the design of Masonry Structures, TMS 402-16 "Building Code Requirements for Masonry Structures". Within the experimental program, 16 types of concrete masonry walls were constructed and tested, 2 reinforced with conventional steel and 14 reinforced with FRP. The length of the walls varies from 1.0 m to 1.8 m, with amounts ranging from 0.13% to 0.45%. The thickness of the walls was 14 cm and the height of 203 cm. Unit deformations on the reinforcing bars were measured by gauges and the deflections were also recorded at half height of the specimens by LVDT - Linear Variable Differential Transformer. By making a relation between the theoretical and experimental data, of the flexural strength of the walls, it was found that this ratio was greater than 1.0 for the walls of smaller amounts of reinforcement and greater separations between bars. It was observed that for a limit displacement in the masonry of 0.007h in walls reinforced with steel, the walls reinforced with FRP would allow a maximum displacement of 0.018h. The walls to be submitted to their maximum capacity presented a behavior of totally elastic and recoverable deflections, presenting the advantage of being able to be repaired because its reinforcement material does not present a zone of plasticity and its behavior is elastic until failure. The failure mode presented in the walls reinforced with FRP was by crushing in the masonry coinciding with the theoretical failure.
URI: http://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=20759
http://repositorio.escuelaing.edu.co/handle/001/609
Appears in Collections:CF - Trabajos de Grado Maestría en Ingeniería Civil

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Tesis dob Final.pdfSe planteó un programa experimental para evaluar la capacidad ante cargas perpendiculares al plano de muros de mampostería reforzados internamente con barras de polímeros reforzados con FRP “Fiber Reinforced Polymer” por sus siglas en inglés, con el fin de generar un protocolo de diseño preliminar para evaluar la capacidad teórica de dichos muros, toman-do como base los requisitos especificados en el ACI 440.1R-15 y el TMS 402-16. Dentro del programa experimental, se constru-yeron y ensayaron catorce muros reforzados internamente con barras de FRP y dos muros reforzados con acero convencio-nal. Se midieron deformaciones unitarias en las barras de refuerzo mediante deformímetros electrónicos e igualmente se registraron las deflexiones en la mitad de la altura de los especímenes mediante transformadores diferenciales lineales varia-bles. Los muros reforzados con FRP, al ser sometidos a su máxima capacidad presentaron un comportamiento de deflexiones elásticas y parcialmente recuperables hasta la falla, presentando la ventaja de poder ser reparados debido a que su ma-terial de refuerzo no presentaba una zona de plasticidad. El modo de falla presentado en los muros reforzados con FRP fue por aplastamiento en la mampostería coincidiendo con la falla teórica esperada. 4.37 MBAdobe PDFView/Open
autorización.pdfAutorización de publicación de documento697.61 kBAdobe PDFView/Open


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