Aplicación del método dfe diseño directo basado en el desplazamiento (DDBD) para pilas y pilotes pre barreanados

Abstract

The present research is focused on expanding the Direct Design Based on Displacement (DDBD) method for pre-drilled piles and piles. This is the purpose of the development of new equivalent models for clays of medium and hard consistency; And more resistant sands, in addition to the implementation of hysteretic damping curves corresponding to each type of soil. This work is based on a parametric study in which static inelastic and time history analysis are used to obtain the response of pre-drilled stacks of different dimensions, embedded in different soil types. The Displacement-Based Direct Design Method is a tool for the structural analysis of bridges, especially for piles and drilled foot piles of reinforced concrete embedded in clays and sands. With this method, it is designed so that its capacity to deform is greater than or equal to the demand low to a seismic action, which can be expressed in terms of objective displacement. This method does not consider soil interaction, however, it considers the effects of soil-structure interaction, such as damping. In addition, the DDBD method (Suárez, 2005) considers the viscous damping equivalent and calculates the moments in an appropriate way. In addition to this DDBD models the pile-floor system with an embedment length that is at the point of maximum moment and the rigidity of the system which is calibrated by factors. In the appendices, an example of calculation is presented in detail: The calculation of a pre-drilled pile, the same that will be applied an equivalent model, pushover, a nonlinear analysis of history in time and equivalent damping.