SOIL STRUCTURE INTERACTION EFFECTS ON MULTISTOREY R/C STRUCTURES

Öz

This paper addresses the behavior of multistorey structures considering soil structure interaction under earthquake excitation. For this purpose, sample 3, 6, 9 storey RC frames are designed based on Turkish Seismic Design Code and analyzed in time domain with incremental dynamic analysis. Strength reduction factors are investigated for generated sample plane frames for 64 different earthquake motions recorded on different site conditions such as rock, stiff soil, soft soil and very soft soil. According to the analysis result, strength reduction factors of sample buildings considering soil structure interaction are found to be almost always smaller than design strength reduction factors given in current seismic design codes, which cause an unsafe design and nonconservative design forces

Anahtar Kelimeler

• Incremental dynamic analysis, soil structure interaction, strength reduction factor

Kaynakça

1. Veletsos A.S., Newmark N.M., Effect of inelastic behavior on the response of simple systems to earthquake motions. Proceedings of the Second World Conference on Earthquake Engineering, Tokyo, 895–912, 1960.
2. Newmark, N.M., Hall, W.J., Seismic design criteria for nuclear reactor facilities. Report No. 46, Building Practices National Bureau of Standards, U.S. Department of Commerce, pp.209-236, 1973. Mitigation,
3. Lai S.P., Biggs J.M., Inelastic response spectra for a seismic building design. Journal of Structural Engineering, ASCE, 106:1295–310, 1980.
4. Riddell R., Hidalgo P., Cruz E., Response modiŞcation factors for earthquake resistant structures. Earthquake Spectra; 5(3):571– 90, 1989.
5. Elghadamsi, F.E., Mohraz, B., Inelastic earthquake Engineering and Structural Dynamics, Vol. 15, pp. 91-104, 1987. Earthquake
6. Nassar, A.A., Krawinkler, H., Seismic demands for SDOF and MDOF systems. Report No.95, The John A. Blume Earthquake Engineering Center, Stanford University, Stanford, California, 1991.
7. Miranda, E., Site dependent strength reduction factors. Journal of Structural Engineering, ASCE, Vol.119, No.12, 1993.
8. Aviles, J., Perez-Rocha, L.E., Influence of foundation flexibility on Rµ factors. Journal of Structural and Cµ Engineering, ASCE, Vol.131, No.2, 2005.

9. Ghannad, M.A., Jahankhah, H., Site- dependent strength reduction factors for soil-structure systems. Soil Dynamics and Earthquake Engineering, 27: 99-110, 2007.
10. Ministry of Public Works and Settlement, Turkish Seismic Design Code, Ankara, 2007. [in Turkish]
11. Applied Technology Council - ATC, Seismic evaluation and retrofit of concrete buildings. ATC-40, Applied Technology Council, California, 1996.
12. Applied Technology Council - ATC, Quantification of building seismic performance factors. ATC-63, Applied Technology Council, California, 2008.
13. Boore, D.M., Some notes concerning the determination of shear-wave velocity and attenuation. Proceedings of geophysical techniques for site and characterization, p. 129-34, 1993. material