THREE-DIMESIONAL SEISMIC ANALYSIS FOR SOIL-FOUNDATION-SUPERSTRUCTURE BASED ON DYNAMIC SUBSTRUCTURE METHOD

Employing Foundation Nonlinearity to Mitigate Seismic Demand in Superstructure

Because of difficulty in inspection and retrofit of foundation in comparison with other elements, the common design philosophy is to avoid any nonlinear deformation in the foundation. This paper shows that by employing controlled foundation nonlinearity, in predetermined sections with arrangements for inspection and retrofit, it is possible to reduce seismic demand on superstructure. Localizing...

Seismic stability of reinforced-soil wall by pseudo-dynamic method

Determination of the internal stability of reinforced soil walls under earthquake conditions is an important part of seismic design. The horizontal method of slices is used for determining internal stability or for tieback analysis of the reinforced soil wall. A pseudo-dynamic method is adopted in the present analysis, which considers the effect of phase difference in both the shear and primary...

Seismic Design of Steel Structures Based on Ductility and Incremental Nonlinear Dynamic Analysis

In this paper a simple tool for seismic design of steel structures for a selected ductility level is presented. For this purpose, a consistent set of earthquakes is selected and sorted based on the maximum acceleration of ground surface. The selected records are applied as the base motion to a single-degree-of-freedom system with strain hardening and the maximum response acceleration is determi...

Probabilistic Seismic Assessment of Structure, Foundation, and Soil Interacting Systems

Soil–Foundation–Structure Interaction Effects in Seismic Behavior of Bridges

Presented here is an analysis of the effects of soil-foundation-structure interaction (SFSI) on seismic response of highway bridges. Of particular importance is the issue of input motions, their scaling and application to the SFS models. The analysis presented in this paper addresses the influence of inelastic behavior of both the soil and the structural components during seismic response evalu...