Browsing by Author "Sánchez Guerrero, Johnny Homero"

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Comportamiento a flexión de conexiones apernadas tipo Brida en estructuras de telecomunicaciones tipo monopolo, empleando el método de elementos finitos y validación con prototipo a escala
(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2019) Sánchez Guerrero, Johnny Homero; Lagos Zamora, Christian David; Arroba Arroba, César Hernán
The present investigation is developed in order to identify the main causes of failure in bolted connections type flange used in structures type monopole subjected to bending due to the incidence of wind loads according to the considerations of design and analysis proposed by the Association of the Telecommunications Industry in the TIA-222-G standard. The information was collected through a theoretical-technical review of the functional and service characteristics to which the connections are exposed, using bibliographic resources and field measurements, and the behavior of bending was analyzed using the finite element method. of a structure of 6 sections using solid elements and shell elements in order to verify the proposed analysis methodology. The experimental analysis includes tests to flex the prototype to scale in a test bench. Said test was carried out in ten stages: 1) Analysis of finite element analysis data, 2) Determination of height-displacement relationship, 3) 3D geometric modeling of several prototypes, 4) Finite element testing of prototypes, 5) Analysis of the results of the finite elements test of the prototypes, 6) Selection of the most optimal prototype, 7) Design and construction of the test bench, 8) Experimental tests in the test bench, 9) Taking and recording data of parameters of load and displacement by means of a balance type crane and a comparator clock, 10) comparison of the results obtained by the analysis by finite elements and the physical test. In order to optimize the joints studied, an experimental test was carried out using finite element software, varying the thicknesses and the number of bolts of the joints in the structure of 6 sections and the prototype that allow to elaborate a simplified model by obtaining the characteristics of the behavior and of the equations that make it possible to reproduce the non-linearity present in this type of structure with the help of a software for matrix resolution. Finally, we verified the results obtained by checking the deviation of the results obtained in the metamodel, the experimental tests and the FEA analysis, optimizing the flexural analysis of the flanged joints of monopole structures, reducing the processing time and the computational cost.
Comportamiento a flexión de conexiones apernadas tipo Brida en estructuras de telecomunicaciones tipo monopolo, empleando el método de elementos finitos y validación con prototipo a escala
(Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Mecánica, 2019) Lagos Zamora, Christian David; Sánchez Guerrero, Johnny Homero; Arroba Arroba, César Hernán
The present investigation is developed in order to identify the main causes of failure in bolted connections type flange used in structures type monopole subjected to bending due to the incidence of wind loads according to the considerations of design and analysis proposed by the Association of the Telecommunications Industry in the TIA-222-G standard. The information was collected through a theoretical-technical review of the functional and service characteristics to which the connections are exposed, using bibliographic resources and field measurements, and the behavior of bending was analyzed using the finite element method. of a structure of 6 sections using solid elements and shell elements in order to verify the proposed analysis methodology. The experimental analysis includes tests to flex the prototype to scale in a test bench. Said test was carried out in ten stages: 1) Analysis of finite element analysis data, 2) Determination of height-displacement relationship, 3) 3D geometric modeling of several prototypes, 4) Finite element testing of prototypes, 5) Analysis of the results of the finite elements test of the prototypes, 6) Selection of the most optimal prototype, 7) Design and construction of the test bench, 8) Experimental tests in the test bench, 9) Taking and recording data of parameters of load and displacement by means of a balance type crane and a comparator clock, 10) comparison of the results obtained by the analysis by finite elements and the physical test. In order to optimize the joints studied, an experimental test was carried out using finite element software, varying the thicknesses and the number of bolts of the joints in the structure of 6 sections and the prototype that allow to elaborate a simplified model by obtaining the characteristics of the behavior and of the equations that make it possible to reproduce the non-linearity present in this type of structure with the help of a software for matrix resolution. Finally, we verified the results obtained by checking the deviation of the results obtained in the metamodel, the experimental tests and the FEA analysis, optimizing the flexural analysis of the flanged joints of monopole structures, reducing the processing time and the computational cost.