bachelorThesis
Dimensionamento e análise comparativa de esforços e taxa de armadura pelo software TQS: estudo de caso para laje protendida com e sem aderência
Fecha
2021-11-23Registro en:
PORTES, Leonardo Müller. Dimensionamento e análise comparativa de esforços e taxa de armadura pelo software TQS: estudo de caso para laje protendida com e sem aderência. 2021. Trabalho de Conclusão de Curso (Engenharia Civil) - Universidade Tecnológica Federal do Paraná, Pato Branco, 2021.
Autor
Portes, Leonardo Müller
Resumen
Prestressed concrete is increasingly used in current constructions, but there is a gap in studies addressing bonded prestressing in residential buildings. This study performs the design and comparative analysis of bending efforts and reinforcement ratet ween a bonded and unbonded prestressed flat slab in a residential building, in order to contribute to the technical knowledge in the area. For this purpose, the bonded and unbonded prestressed concrete was studied, the bending dimensioning of a bounded pre stressed flat slab was performed in the software TQS based on the Brazilian standards ABNT NBR 6118 (2014) and ABNT NBR 6120 (2019), also based on the American standards ACI 318-95 and ACI 423.3R-17 and academic papers. The results obtained were compared with the ones from the same project originally made in unbonded prestressed concrete, and the technical viability of implementing bonded and unbonded prestressing concrete in residential buildings was analyzed. The highest bending moment values obtained in the new project were 21.3 kN.m and -15.6kN.m, while in the original project 137.9 kN.m and -73.61 kN.m were obtained, showing that the bonded prestressing was more able to balance the loads on the pavement. The armor rates obtained were 6.53kg/m² for active armor, 6.06 kg/m² for passive armor and 0.945 kg/m² for ancho rage armor, while originally had the values of 4.08 kg/m², 7.52 kg/m and 0.417 kg/m² respectively, with lower consumption of passive armor in the new project. It was concluded that bonded prestressing concrete is not viable in small residential buildings due to the heavy equipment used in its execution, where unbounded prestressing is more advantageous due to its simplicity of execution.