Aplicación del ddbd (direct displacement based design) y comparación con el fbd (force based design) en estructuras regulares. (enfocado a evaluar geometría estructural): pórticos de hormigón armado resistentes a momento (de 5 a 20 pisos).

Abstract

This curricular integration project aims to perform a comparative assessment of the seismic-resistant design of 3 different structural geometries made up of moment-resistant reinforced concrete frames, through the application of 2 different methodologies: force-based design method (FBD) and Direct Displacement-Based design method (DDBD). For the FBD method, the linear static analysis of the structure was carried out, which is mandatory for the calculation and seismic-resistant design of any structure in Ecuador, based on the criteria established in the NEC-SE-DS (2014). Additionally, for this method, the design of the elements was carried out based on the provisions of the NEC-SE-HM (2014) and ACI 318-19 (2019). On the other hand, for the application of the DDBD, the structural analysis and design by the elements’ capacity was carried out, through the criteria and procedures established in Priestley, Calvi, and Kowalsky (2007), which bases its analysis on the concept of the surrogate structure or equivalent system of one degree of freedom. In this way, for the 3 proposed structural geometries, the results of basal shear, drift, and reinforcement (amount of steel) obtained from the application of force-based design (FBD) and direct displacement-based design (DDBD) were compared and evaluated, in order to establish the main differences between these two methods.