Maestría en Ingeniería Civil con Mención en Estructuras Metálicas

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

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Start date: 2023Subject: search.filters.subject.SECCIONES COMPUESTAS

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    Comparación de diseños de vigas de alma abierta con conectores de corte de perfil angular y de varilla corrugada para determinar su grado de eficiencia
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas., 2025) Oña Cifuentes Cristian Jair; Cevallos Cabrera Jorge Washington
    The purpose of this article is to compare the strength and deflections at the yield limit and maximum capacity provided by the composite system of an open-web beam with a solid slab and shear connectors using corrugated rebar and angles. The specimens were fabricated using materials from Ambato y Quito, Ecuador, including ASTM A36 steel, ASTM A615 steel, and concrete with a compressive strength of f'c = 210 kg/cm². These comparisons were based on the results obtained from a four-point bending test conducted on two six-meter-long specimens with corrugated rebar connectors and two with angle connectors. This research analyzed the efficiency of the specimens in dissipating energy in the elastic and plastic regions, their ductility, stiffness, structural behavior regarding deformations, and failure modes during the interactive load versus deflection process. The average capacity for each type of connector was determined, and comparative calculations were performed, revealing a 16% variation in the yield limit and a 6% variation in the plastic limit, concluding that the two systems differ in structural strength. The results also validate the accuracy of the calculation methodologies for the beam’s nominal moment resistance and the precision of the formulations adapted for shear connectors using rebar and angles, given that AISC and SJI do not provide a specific method for this type of connection.
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    Evaluación de estado límite por deflexión en losas con vigas compuestas tipo Joist fabricadas con acero ASTM A36
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2023-03) Allauca Llamuca, Miguel Angel; Cevallos Cabrera, Jorge Washington
    The goal of this project is to evaluate the limit state to deflection in slabs with composite Joist beams made of ASTM A36 steel, considering the floor systems frequently used in our country. The Joist beam design was carried out for a free length of 5.00 m and an effective width of 0.40 m, considering the specifications established in the Ecuadorian Construction Standard for the quantification of loads, then, the structural analysis of the beam was carried out in the structural analysis program to obtain the axial loads in tension and compression of the bars that are part of the Joist, and by using the SJI specifications, the upper and lower chords, diagonals of the beam web, the saddle and the shear connectors were designed. The limit state deflection analysis was carried out in the structural analysis program for the three case studies proposed in the project: Joist beam designed as noncomposite, Joist beam composed with solid slab and Joist beam composed with steel deck, applying different load values. The beams were manufactured in the VIGA-TEC workshops, located in Quito, and were transported to Ambato, to assemble the formwork and cast the concrete to form the composite sections with solid slab and steel deck. The concrete used was made with aggregates from Peninsula’s quarry of Ambato for a compressive strength of 21MPa. The experimental load/strain test was carried out at the Technical University of Ambato at the Ingahurco campus following the requirements of the AISC 360-16 and American National Standard SJI 200 - 2015 codes. Finally, the results of the experiment were used to evaluate the deflection limit states of the three case studies presented in this project.