Abstract
The present research analyzed the influence of the soil structure interaction (SSI) in buildings, varying geotechnical parameters and height, considering 3 international codes. The responses obtained from the structures taking into account the SSI, were compared with the responses of fixed-base buildings, being the main control variables: the period and the drift. It was determined that the estimated range in which the period of the structure increases is from 30 to 98%, demonstrating the influence of considering soil flexibility. Due to the variability of the responses obtained, an adjustment factor is proposed to predict said amplification of the control variables, depending on the height of the building and the ground.
Highlights
The conventional analysis performed for the modeling of a building is based on recessing the structure considering an infinitely rigid floor
This idealization does not reflect the real behavior of the soil since it, depending on its geotechnical parameters, provides a certain stiffness that is related to an elastoplastic behavior [1]
The data that will be used for this study will have the following characteristics: the first 3 floors of the analyzed structures will not be used, since the variation of their results (SSI vs fixed), does not fit the data dispersion and the correlation will be established for structures greater than 12.00m at 35.00m
Summary
The conventional analysis performed for the modeling of a building is based on recessing the structure considering an infinitely rigid floor. This idealization does not reflect the real behavior of the soil since it, depending on its geotechnical parameters, provides a certain stiffness that is related to an elastoplastic behavior [1]. Aydemir et al [4], evaluated the behavior of structures considering SSI under the effect of an earthquake. The authors verify the increase in the period and demonstrate that the influence of considering such interaction is greater in soft soils. This study demonstrated the importance of considering the soil-structure interaction in the design of buildings, demonstrating how displacements increase. The predominant frequency of the soil was very similar to the frequency of buildings with greater structural damage, this correlates with the effects of resonance, an effect that in several of the cases analyzed could have increased seismic demand and thereby justify the increase in damage observed
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