scholarly journals SEISMICALLY EFFECTIVE DAMPER PLACEMENT FOR SHEAR-FLEXURAL BUILDING MODELS INCLUDING SOIL STRUCTURE INTERACTION

2000 ◽  
Vol 65 (530) ◽  
pp. 77-84 ◽  
Author(s):  
Izuru TAKEWAKI
Keyword(s):  
Soil Structure ◽  
Soil Structure Interaction ◽  
Structure Interaction ◽  
Building Models

scholarly journals Correlation between Ground Motion Parameters and Displacement Demands of Mid-Rise RC Buildings on Soft Soils Considering Soil-Structure-Interaction

Buildings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 125
Author(s):  
Muhammet Kamal ◽  
Mehmet Inel
Keyword(s):  
Ground Motion ◽  
Soil Structure ◽  
Soil Structure Interaction ◽  
Rc Buildings ◽  
Ground Motion Parameters ◽  
Structure Interaction ◽  
Inelastic Displacement ◽  
Building Models ◽  
Ground Motion Parameter ◽  
Motion Parameters

This paper investigates the correlation between ground motion parameters and displacement demands of mid-rise RC frame buildings on soft soils considering the soil-structure interaction. The mid-rise RC buildings are represented by using 5, 8, 10, 13, and 15-storey frame building models with no structural irregularity. A total of 105 3D nonlinear time history analyses were carried out for 21 acceleration records and 5 different building models. The roof drift ratio (RDR) obtained as inelastic displacement demands at roof level normalized by the building height is used for demand measure, while 20 ground motion parameters were used as intensity measure. The outcomes show velocity related parameters such as Housner Intensity (HI), Root Mean Square of Velocity (Vrms), Velocity Spectrum Intensity (VSI) and Peak Ground Velocity (PGV), which reflect inelastic displacement demands of mid-rise buildings as a damage indicator on soft soil deposit reasonably well. HI is the leading parameter with the strongest correlation. However, acceleration and displacement related parameters exhibit poor correlation. This study proposed new combined multiple ground motion parameter equations to reflect the damage potential better than a single ground motion parameter. The use of combined multiple parameters can be effective in determining seismic damages by improving the scatter by at least 24% compared to the use of a single parameter.

Coupled Soil-Structure Interaction Effects of Building Clusters during Earthquakes

2015 ◽  
Vol 31 (1) ◽  
pp. 463-500 ◽  
Author(s):  
Yigit Isbiliroglu ◽  
Ricardo Taborda ◽  
Jacobo Bielak
Keyword(s):  
Ground Motion ◽  
Soil Structure ◽  
Dynamic Properties ◽  
Soil Structure Interaction ◽  
Rigid Base ◽  
Northridge Earthquake ◽  
Structure Interaction ◽  
Building Models ◽  
Building Foundation ◽  
San Fernando

This study addresses the responses of idealized building clusters during earthquakes, their effects on ground motion, and the ways individual buildings interact with the soil and with each other. We simulate the ground motion during the 1994 Northridge earthquake and focus on the coupled responses of multiple simplified building models located within the San Fernando Valley. Numerical results show that the soil-structure interaction (SSI) effects vary with the number and dynamic properties of the buildings, their separation, and their impedance with respect to the soil. These effects appear as: (i) an increased spatial variability of the ground motion; and (ii) significant reductions in the buildings’ base motion at high frequencies, changes in the higher natural frequencies of the building-foundation systems, and variations in the roof displacement, with respect to those of the corresponding rigid-base and single SSI models.

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