Maestría en Ingeniería Civil con Mención en Estructuras Metálicas

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/34193

Browse

Has files: YesSubject: search.filters.subject.DIAGONALES EXCÉNTRICAS

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Análisis comparativo de una estructura habitacional con diagonales excéntricas y una estructura sin diagonales excéntricas, ante una solicitación sísmica
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Salazar Gamboa, Alvaro Napoleón; Frías Torres, Alex Xavier
    The main objective of this research work was the comparative analysis of a housing structure under seismic stress, taking as a reference point the urban area of Ambato, capital city of the province of Tungurahua, where the building under study is located. A specialized software was used for the modeling and design of the structure, as well as the guidelines of the Ecuadorian construction standard NEC-SE-DS 2015 and ANSI/AISC 360 and 341, respectively. The results obtained were satisfactory with respect to drifts and deflections, according to the configuration in columns, beams and diagonals it was not necessary to redesign the sections of the structural elements. Regarding the analysis, it should be noted that both the structure without eccentric braced frame and the structure with eccentric braced frame obtained an adequate behavior, with drifts of less than 2 percent that comply with the stipulations of the standard, but a notable difference was evidenced in the sections of both columns and beams, obtaining a 45.88 percent reduction in the weight of the structural elements. In the structure with eccentric braced frame, the drifts were maintained within the established limits for this typology according to the NEC with the inclusion of some diagonals, which helped to improve the behavior, reducing considerably the different sections of the structural elements, thus lightening the structure, achieving a balance and avoiding torsional effects in the floor plan, as well as allowing compliance with the maximum floor drifts that limit seismic damage. It was concluded that the structure with eccentric braced frame presents a better lateral resistance to the action of an earthquake due to the addition of the diagonals, which are responsible for redistributing the lateral forces within the building, lightening the structure and considerably reducing the weight of the elements and the consumption of materials.
  • No Thumbnail Available
    Item
    Evaluación de edificios de mediana altura en estructura de acero con diagonales excéntricas, concéntricas
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Abril Gavilanes, Bernarda Estefanía; Guerra Avendaño, Oswaldo Marcelo
    The purpose of this research project is to use stiffening systems that allow for better structural performance in the presence of seismic events by comparing structural energy dissipation systems such as: buildings with concentric diagonals in the form of x and buildings with eccentric diagonals with a link length of 1 meter in medium-rise steel buildings considering the mechanical and physical properties of these elements as well as the implementation and construction advantages. In this project, two 20-story steel buildings were compared, which have seismic stiffening systems that were located symmetrically in the structure, for modeling the ETABS 2016 software was used, applying the Ecuadorian Construction Standard (NEC-15). ), as well as the verification of compliance with the AISC 341-16 standard, from which an optimal seismic-resistant structural design was obtained that is within the permitted parameters. The use of concentric and eccentric diagonals allows to guarantee the stability in the structure, to obtain an appropriate structural behavior that allows to be able to minimize the horizontal movements caused by the earthquakes and the wind, it requires a greater rigidity and stability to the structure. The result was obtained by using concentric diagonals a vibration period of 2.037 seconds, the inelastic floor drift was 0.0129 mm, likewise the value of static and dynamic shear were 580.78 and 464.62 respectively, while when using eccentric diagonals the period of vibration was 1.921 seconds, with inelastic floor deviations of 0.0118 mm, complying with the requirements established by the NEC-15 norm, in the same way a static shear of 615.868 and a dynamic shear of 492.695. Additionally, a non-linear static analysis (Pushover) was carried out, where a load pattern was applied to all the nodes that join the main beams and columns, which is related to the modal shapes of the first two vibration modes of the steel structure. of medium height, where from the static capacity curve it was possible to observe that in the two models used concentric diagonals as well as eccentric diagonals the result is similar in terms of resistance drops, however compared to the concentric system, the system of Eccentric diagonals have higher ductility.