Nonlinear Inelastic Dynamic Analysis with Soil-Flexibility in Rocking,

摘要

This report compares the dynamic response of a building on a rigid foundation designed for earthquakes to the dynamic response of the same building on a nonlinear inelastic flexible foundation. A 17-story reinforced concrete shear wall apartment building was placed on each one of two limiting cases of clay soils. Foundation systems were designed for each soil profile according to existing codes,and moment-rotation relationships for each foundation system were generated. An existing dynamic response computer program was modified to incorporate the predicted moment-rotation characteristics of the foundations. Response of the building on both flexible foundation systems were compared to the response of that building on a rigid foundation,and significant differences identified.