Evaluation of the Seismic Response of Reinforced Concrete (RC) Buildings Considering Soil-Structure-Interaction Effects

Abstract

The dynamic response of the structure is influenced by soil-structure interaction (SSI), and is distinct from the fixed-base one. When stiff structures are supported by soft to very soft soil, SSI has a substantial effect. This work intends to investigate the effects of SSI using various estimation techniques in order to quantify the foundation damping effect on the response of reinforced concrete (RC) buildings. Generalized and completely viscous damping formulas were utilized to estimate the damping of the soil-foundation system. The investigated structures are 4, 8, and 12-story RC buildings built on very soft soil in a high seismic zone. In comparison to the fixed base condition, the study demonstrated an increase in the natural period, damping of the system, and a decrease in base shear. The study's response parameters are compared to those obtained in accordance with ASCE7-16 code provisions.

Keywords

• Foundation damping
• SSI
• RC building
• Base shear
• ASCE7-16

References

1. Asce. (2007). Minimum design loads and associated criteria for buildings and other structures. American Society of Civil Engineers, 1877, 7-16.
2. Avilés, J., & Pérez Rocha, L. E. (2011). Use of global ductility for design of structure-foundation systems. Soil Dynamics and Earthquake Engineering, 31(7), 1018–1026.
3. Givens, M. J., Mylonakis, G., & Stewart, J. P. (2016). Modular analytical solutions for foundation damping in soil-structure interaction applications. Earthquake Spectra, 32(3), 1749–1768.