Abstract
In some cases, tall buildings are located in geotechnically unsuitable places, due to their high ratio of height to width; there is risk of uplift and other effects such as overturning and reduction structure serviceability during earthquake. This research is aimed to evaluate the effect of Soil-Structure Interaction (SSI) on seismic behavior of two adjacent 32 story buildings such as time period, base shear and displacements. The interaction effects are investigated for variable distance between the two buildings. Three types of soil such as soft clay, sandy gravel and compacted sandy gravel are considered for this study. The result obtained that the interaction effect increases time period of both buildings base shear and lateral displacement of the structures increases.
Highlights
A method has been presented for evaluation of structures with a risk of foundation uplift or slip[1]
The results of analytical-experimental studies proved that increasing of time period and damping in tall buildings is more than low-rise buildings and these effects are negligible in upper modes
The ratio of maximum lateral displacement and maximum base shear of two adjacent buildings to the single building on subsoil is shown in Fig. 12 and 13
Summary
A method has been presented for evaluation of structures with a risk of foundation uplift or slip[1]. Research has shown that Soil-Structure Interaction increases the time period and damping in structural models[2]. These effects are more considerable in soft soil to compact soil. With increase of structure damping, the effects of SSI (SoilStructure Interaction) are decreases. Researchers have examined the effects of SSI in pounding of two adjacent structures[3] Both of subsoil and high time period pounding can increase the potential of pounding of two adjacent structures. Poison ratio for all types of soil is assumed as 0.3 Barghi recommended that it is better neglecting variation of this ratio
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