Análisis comparativo del Desempeño de Pórticos Planos diseñados por el Código Ecuatoriano de la Construcción y por el método de Diseño Directo Basado en Desplazamientos

Abstract

A comparative analysis of the earthquake-resistant design of flat porticoes is presented, which shows a new design methodology called "Direct Design Based on Displacement (DDBD)." This study evaluates the performance of two methods: the one proposed in The Ecuadorian Code of Construction (CEC-2000), which is based on forces and DDBD, which is based on displacements.The comparison is based on the results of 30 flat porticos that have been designed by both methods. ) The degree of precision with which the methods predict the floor drifts 2) The ease of application of the methods Verification analyzes were performed to determine the precision with which the methods predict the performance of the frames. Was used was the Dynamic Dynamic Analysis "ADI" proposed by Vamvatsikos and Cornefl [2002], which requires the realization of non-linear analysis of history in time.The calculation process begins with the determination of the required seismic forces, for The CEC-2000 method and by the DDBD, which was done in the program Microsoft Excel and ends with the design of each one of the porticos, in Etabs 8.26 [CSI, 2004]. For verification analysis it is necessary to obtain momentum curvature diagrams of the armed sections, which were obtained from the USC-RC program [Esmaeily A, 20011, and the application of the Nonlinear History of Time (NTHA) analysis was made possible To the support of the Ruaumoko program [Carr 19961. The study revealed, among other things, that the porches designed by the CEC-2000 and by the DDBD, present a good seismic performance. Details of the study are presented as well as all the results of comparative analysis.