Implementación del diseño directo basado en desplazamientos para puentes con sistemas de aislamientos sísmico

Abstract

Bridge Design with Seismic Insulation Systems has gained in popularity due to the advantages it has in terms of the reduction of forces and damage control of the structure. In this research, Direct Design Based on Displacement (DDBD) is implemented for bridges with this type of systems. This paper presents a compilation of existing literature on the Menshin and AASHTO design methods. In addition, DDBD is implemented for isolated bridge design. To implement the DDBD, particular attention is given to: 1) The interaction between the insulator and the substructure, 2) Combination of the equivalent damping given by insulation devices and reinforced concrete piles, and 3) Damping models used with dissipation devices Of energy. The application of each proposed procedure is demonstrated with examples of design that include: elastomeric isolators with lead nucleus and cells that support simply supported superstructures. For comparison purposes, the current AASHTO design specs with seismic insulation are also used with design examples. The efficiency of the procedure is evaluated by a non-linear analysis of history in time.