How do you model soil structure interactions?

Abstract. A simple three-dimensional soil–structure interaction (SSI) model is proposed. First, a model is developed for a layered soil medium. In that model, the layered soil medium is divided into thin layers and each thin layer is represented by a parametric model.

What is soil-structure interaction analysis?

The soil-structure interaction analysis is the method of evaluating the collective response of the three linked systems mentioned above for a specified ground motion.

Why soil-structure interaction is important?

Considering soil-structure interaction makes a structure more flexible and thus, increasing the natural period of the structure compared to the corresponding rigidly supported structure. Moreover, considering the SSI effect increases the effective damping ratio of the system.

Is code for soil-structure interaction?

IS:1893
Abstract. The Indian seismic design code IS:1893 (Part 1) (BIS, 2002) suggests ignoring soil–structure interaction (SSI) studies for seismic design of structures located on rock or rock-like material.

What is Winkler model?

Winkler Model ➢ Winkler’s idealization represents the soil medium as a. system of identical but mutually independent, closely. spaced, discrete, linearly elastic springs. ➢ According to this idealization, deformation of foundation. due to applied load is confined to loaded regions only.

What is soil structure PDF?

Soil structure refers to the organization and arrangement of soil particles and the resultant complex maze of pores.

What is soil pile interaction?

Soil-Pile-Structure Interaction (SPSI) has an important effect in the dynamic analysis and seismic design of massive or stiff structures and pile foundations. Because of soil stiffness degradation under earthquake excitations, pile foundation configurations affect the seismic response of soil-pile-structure systems.

What are the limitations of Winkler’s model?

Limitations of the Winkler Method As the springs are independent and do not interact, the deformation of the ground is constricted in the loaded region, an assumption that is unrealistic since the soil is a continuous material as it deforms as depicted in Figure 3.

What are the limitations of Winkler’s foundation model?

Limitations of Winkler Model numerical value of the coefficient of subgrade reaction not only depends on the nature of the subgrade, but also on the dimensions of the loaded area as well.

What is the difference between time history and response spectrum?

Time history analysis is based on the generated forces of past earthquake happenings under static conditions. Response spectrum analysis indicates the dynamic behaviour of structure under peak ground acceleration and is useful to assess the performance of structure under dynamic excitation.