Site response analysis using a non-linear hysteretic model

✍ Scribed by Grigori Muravskii; Sam Frydman

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 813 KB
• Volume: 17
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/s0267-7261(98)00002-5

✦ Synopsis

A non-linear model for the description of soil response to earthquake loading is presented, and applied to the prediction of surface vibration for a given soil profile. The model is developed on the basis of well-established experimental trends with regard to the strain dependence of shear modulus and damping ratio, as well as cyclic degradation of stiffness. A constitutive equation for one-dimensional shear deformation is constructed on the basis of a hysteretic, frequency-independent damping model, with the assumption that elastic and damping coefficients are functions of mean values of deformation. One-dimensional propagation analyses are carried out by using the proposed model and an equivalent linear model, and the results are compared. The comparison highlights some limitations of the equivalent linear approach, and it is shown that these are solved by the new procedure.