RESUMEN
A hybrid model for soils, which combines percolation theory and finite element method is presented. The internal soil structure is modelled via the finite element method, and percolation networks are used for analyzing its mechanical behaviour. Through a microscopic characterization of elastic properties of soil grains, the model is generated. The effective percolation threshold obtained is lower than that of the network geometric percolation. The effective mechanical properties predicted are successfully compared to published experimental results.
Asunto(s)
Terremotos , Impacto de los Desastres , Vivienda , Efectos de Desastres en las Edificaciones , México , 34623Asunto(s)
Terremotos , Ingeniería , Industria de la Construcción , Evaluación de Daños , Medición de RiesgoRESUMEN
The suitability of jacketing of non-ductile frame elements as a rehabilitation technique was assessed experimentally. The research was aimed at studying the shear strength performance of jacketed joints. Four large-scale beam-column connections were rehabilitated and tested under bidirectional cyclic loading. The variables included jacketing of columns only or both columns and beams, damage or no damage prior to jacketing, and the layout of the jacketed column longitudinal reinforcement. Test results indicated that jacketing was effective to rehabilitate the existing structure, thus improving the strength, stiffness and energy dissipation characteristics of the existing structures. Results also indicated that the shear strength of jacketed joints in new construction. Test data also evidenced that the criterion on bar development of current recommendations should be fulfilled by longitudinal reinforcement in the jackets (AU)
