Estudio de la participación de la respuesta lateral de muros estructurales para identificar la condición de edificio dual

Abstract

This degree project aims to evaluate the seismic behavior of a mid-rise building located in the city of Machala, classified as a high seismic hazard zone with soil type D according to the Ecuadorian Construction Code (NEC-15). The structure combines steel moment-resisting frames and reinforced concrete shear walls, and was analyzed to verify whether it meets the criteria to be classified as a dual structural system, in which the walls must resist at least 75% of the base shear. To this end, linear static and modal response spectrum analyses were applied in accordance with the guidelines established in the NEC-SE-DS. The results show that, in certain directions, the walls do not reach the required participation threshold; therefore, the building cannot be classified as a dual system in its current configuration. In addition, for the analysis of internal forces and verification of steel elements, the provisions of the AISC 360-22 standard were used, evaluating compactness, plastic moment, and demand-to-capacity ratio.