Seismic soil response of scaled geotechnical test model on small shaking table
- 10 Downloads
This research comprises a series of shaking table tests and finite element analyses of scaled soil-foundation model to determine the dynamic interaction effects between the foundation and the underlying soil. The purpose of this work is to specify a realistic geometric scaling coefficient for test model to be used in a small-capacity shaking table. The scaling factor addressed in this study involves not only geometric similarity but also kinematic and dynamic similarity with the real system. The free-field soil response under different earthquake excitations for both real system and scaled test model was directly performed by using 2D finite element method under plane-strain conditions. The kinematic interaction of the shallow foundation slab on free-field motion was also examined. In this computational model, the behavior of the soil medium is idealized by linear elastic-perfectly plastic assumption with a yield surface according to Mohr-Coulomb failure criterion. Two different earthquake acceleration records as Chi-Chi (1999) and Loma Prieta (1989) have been carried out at the bedrock level of the soil-foundation system for this study. By comparing the results of the numerical analysis with data from the laboratory tests, the proposed geotechnical model can properly simulate the seismic response of the full-scale real system. It can be concluded that the kinematic interaction effects are negligible in the low frequencies. It should be noted that the local soil properties have considerably amplified the earthquake response of the free-field motions in comparison to the bedrock excitations.
KeywordsFinite element analysis Soil-foundation interaction Shaking table Scaled test model Free-field motion
This study is supported financially by the Sakarya University Scientific Research Project Units under the Project number of 2015-40-01-048 K 120970 and this support is greatly acknowledged.
- Brinkgreve RBJ, Al-khoury R, Bakker KJ, Bonier PG, Brand PJ, Broere W, Burd HJ, Solty G, Vermeer PA, Haag DD (2002) Plaxis finite element code for soil and rock analyses. Published and Distributed by AA. Balkema Publisher, The NetherlandsGoogle Scholar
- Chunyu T, Congzhen X, Hong Z, Jinzhe C (2012) Shaking table model test and seismic performance evalution of Shangai Tower. Int J High-Rise Build 1(3):221–228Google Scholar
- Hosseinzadeh NA, Nateghi F (2004) Shake table study of soil structure interaction effects on seismic response of single and adjacent buildings. In: 13th World Conference on Earthquake Engineering, Vancouver, B.C., CanadaGoogle Scholar
- Li PZ, Hou XY, Liu YM, Lu XL (2012) Shaking table model tests on dynamic structure-soil structure interaction during various excitations. In: 15th World Conference on Earthquake Engineering, LisboaGoogle Scholar
- Meymand PJ (1998) Shaking Table Scale Model Tests of Non-linear Soil-Pile Superstructure Interaction in Soft Clay. Ph.D. Dissertation, Civil and Environmental Engineering Department, U.C. BerkeleyGoogle Scholar
- Wolf JP, Song C (1996) Finite element modelling of unbounded media. USAGoogle Scholar
- Yazdchi M, Khalili N, Valliappan S (1999) Dynamic soil–structure interaction analysis via coupled finite-element–boundary-element method. 18(7):499–517Google Scholar