Evaluación de conexiones madera a madera de la especie campnosperma panamense standl. Utilizando pernos y clavos sometidas a carga lateral para la adaptación de la metodología de la Norma Sismo Resistente Colombiana-NSR

Abstract

Connections are a fundamental part of structures in general, since they influence stiffness, load capacity and structural behavior, therefore the study of their behavior allows determining the strength and degree of structural safety; in spite of this, the deficiency of reliable information available regarding the evaluation of the behavior of connectors, specifically bolts and nails in wood joints, was evidenced. Specifically, there was a lack of studies related to the structural behavior of low density Colombian native woods, as is the case of the Sajo species (Campnosperma panamense Standl.). Therefore, the purpose of this work is to evaluate the behavior of wood-to-wood connections with bolted and nailed joints subjected to lateral loads, for the adaptation of the design methodology of connections in the new Colombian Seismic Resistant Standard - NSR. Experimental tests were performed to determine the loads at the elastic limit (Le), creep (Py) and maximum (Pu), and their subsequent comparison with the theoretical values obtained through the methodologies of the NSR-10 and the NDS-18; It was observed that bolted connections presented a higher safety factor with respect to nailed connections, where for bolted connections, only one single experimental value was obtained below that obtained by calculation with the standards, while nailed connections presented three cases. It was also found that there are significant differences between the densities worked, so that it is recommended to use the basic minimum density due to its safety factor. It is also suggested that the range of values presented in the standard.