scholarly journals Comparison of Seismic isolation with isolator and Soil structure Interaction U-shaped metallic isolator and Soil structure Interaction

2020 ◽  
Vol 184 ◽  
pp. 01097
Author(s):  
G. Jyothi Sravya ◽  
A. Manchalwar
Keyword(s):  
Earthquake Engineering ◽  
Soil Structure ◽  
Seismic Isolation ◽  
Soft Soil ◽  
Structural Response ◽  
Soil Structure Interaction ◽  
Soil Medium ◽  
Structure Interaction ◽  
Steel Damper ◽  
The Impact

Soil condition is an important research area in earthquake engineering. In this work we evaluated the impact of soil-structure interaction (SSI) and U-shaped steel damper on the isolated response of the building base. Different soils for a seismic performance of multistory buildings are systematically compared and discussed. The soil’s physical state is divided into; hard soil, medium soil, and soft soil. It was compared with the U-shaped steel damper and there is noticeable difference between them. This study concludes that the use of steel damper shaped and SSI has been effective in minimizing structural response. It was observed that interaction of the soil structure provides some flexibility to the structure by increasing the structure’s displacements. Modeling base isolation along with consideration of soil structure interaction therefore leads to better structural response prediction.

scholarly journals Seismic damage assessment of a historical masonry minaret considering soil-structure interaction

2021 ◽  
Vol 4 (3) ◽  
pp. 196-212
Author(s):  
Taha Yasin Altıok ◽  
Ali Demir
Keyword(s):  
Finite Element ◽  
Interaction Effect ◽  
Soil Structure ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Structural Behaviour ◽  
Damage Distribution ◽  
Soil Medium ◽  
Structure Interaction ◽  
Historical Masonry

Historical structures should be carefully preserved and transferred to the next generations. Therefore, their seismic performances should be investigated in detail. In the finite element method, many parameters affect the seismic behaviour and damage distribution in the structures. One of the most significant parameters is the Soil-Structure Interaction effect. In finite element analyses, the soil medium is generally neglected, and the structures' base is restrained by fixed supports. In this study, seismic response of a historical masonry minaret is investigated by considering the Soil-Structure Interaction and Operational Modal Analysis methods. To determine the effect of Soil-Structure Interaction on structural behaviour, the fixed supports, hard and soft soil mediums at the base of the structure are modelled. The material and failure behaviours are defined with the Concrete Damage Plasticity model. Displacements, principal stresses, damage rates, and damage distribution of models are obtained with nonlinear time history analyses. According to the results, the interstory drift increases due to the decrease in the stiffness of the soil media. In addition, the fixed supports model was damaged more tensile stress damage than the other models. The least occurred in the soft soil model. It is concluded that the Soil-Structure Interaction effect significantly affects structural behaviour, especially the damage rate and distribution.

Seismic Soft Soil-Structure Interaction Using RLBRB-Equipped Strut in Deep Excavations

2020 ◽  
pp. 1-29
Author(s):  
Abdolghafour Khademalrasoul ◽  
Arash Shirmohammadi ◽  
Mohammad Siroos Pakbaz ◽  
Mojtaba Labibzadeh
Keyword(s):  
Soil Structure ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Deep Excavations ◽  
Structure Interaction

scholarly journals Effect of Soil-Structure Interaction on the Seismic Response of Existing Low and Mid-Rise RC Buildings

2020 ◽  
Vol 10 (23) ◽  
pp. 8357
Author(s):  
Ibrahim Oz ◽  
Sevket Murat Senel ◽  
Mehmet Palanci ◽  
Ali Kalkan
Keyword(s):  
Seismic Response ◽  
Seismic Performance ◽  
Soil Structure ◽  
Soft Soil ◽  
Soil Structure Interaction ◽  
Soil Conditions ◽  
Existing Buildings ◽  
Structure Interaction ◽  
Fixed Base ◽  
New Buildings

Reconnaissance studies performed after destructive earthquakes have shown that seismic performance of existing buildings, especially constructed on weak soils, is significantly low. This situation implies the negative effects of soil-structure interaction on the seismic performance of buildings. In order to investigate these effects, 40 existing buildings from Turkey were selected and nonlinear models were constructed by considering fixed-base and stiff, moderate and soft soil conditions. Buildings designed before and after Turkish Earthquake code of 1998 were grouped as old and new buildings, respectively. Different soil conditions classified according to shear wave velocities were reflected by using substructure method. Inelastic deformation demands were obtained by using nonlinear time history analysis and 20 real acceleration records selected from major earthquakes were used. The results have shown that soil-structure interaction, especially in soft soil cases, significantly affects the seismic response of old buildings. The most significant increase in drift demands occurred in first stories and the results corresponding to fixed-base, stiff and moderate cases are closer to each other with respect to soft soil cases. Distribution of results has indicated that effect of soil-structure interaction on the seismic performance of new buildings is limited with respect to old buildings.

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