Dynamic soil–structure interaction effects on the seismic response of asymmetric buildings

Shakib, Hamzeh; Fuladgar, A.

doi:10.1016/j.soildyn.2004.01.002

Cited by 33 publications

(15 citation statements)

References 20 publications

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“…Both buildings and soil are involved in earthquake excitation and deformation of one affects the other (soil-structure interaction, SSI). SSI effects of buildings have been widely treated by former researchers (Parmelee et al 1969;Gupta, Trifunac 1991;Shakib, Fuladgar 2004;Dutta et al 2004). An experimental test carried out by Gallipoli et al (2006) showed that buildings are able to modify substantially the freefield ground motion in their proximity.…”

Section: Introductionmentioning

confidence: 99%

Ssi and Sssi Effects in Seismic Analysis of Twin Buildings: Discrete Model Concept

Naserkhaki

Pourmohammad

2012

Journal of Civil Engineering and Management

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This paper presents a numerical study of soil-structure interaction (SSI) and structure-soil-structure interaction (SSSI) effects on response of twin buildings during earthquake excitations. The buildings are modeled as shear buildings and the soil is simulated by a discrete model representing a visco-elastic half-space subjected to earthquake acceleration. Equation of motion of twin buildings with different conditions, fixed based (FB), SSI and SSSI, are developed via an analytical procedure and solved numerically. Buildings responses are evaluated for aforementioned three conditions considering various soil types and compared together. One must say that soil causes change in distribution of responses throughout the buildings while ignoring soil interaction may lead to detrimental effects on buildings. Anyway, interaction between twin buildings with SSSI condition slightly mitigates soil unfavorable effects compare to one building with SSI condition. In addition, it is found that influence of soil is very significant for soft to stiff soils whereas negligible for hard soils.

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Section: Introductionmentioning

confidence: 99%

Ssi and Sssi Effects in Seismic Analysis of Twin Buildings: Discrete Model Concept

Naserkhaki

Pourmohammad

2012

Journal of Civil Engineering and Management

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“…Ambient vibrations of buildings were recorded by a number of researchers before and after the infill walls were in place to evaluate their effect on the dynamic response of the structures . Thus, recent experimental and analytical studies have noted that cladding and partition walls, if modeled adequately in finite element (FE) models, can affect the dynamic simulations significantly, as was found, for example, in previous studies . Moreover, for RC buildings with walls as resisting vertical elements or for masonry buildings, the hypothesis of a rigid floor might not always be reliable, and the actual deformability of the floor should be taken in account in the study of the entire structure; the infill walls and partitions increases the transversal stiffness of the vertical elements with respect to the bare frames, making the floor effect not rigid as in framed buildings .…”

Section: Literature Reviewmentioning

confidence: 99%

“…[16][17][18] Thus, recent experimental and analytical studies have noted that cladding and partition walls, if modeled adequately in finite element (FE) models, can affect the dynamic simulations significantly, as was found, for example, in previous studies. [19][20][21] Moreover, for RC buildings with walls as resisting vertical elements or for masonry buildings, the hypothesis of a rigid floor might not always be reliable, and the actual deformability of the floor should be taken in account in the study of the entire structure; the infill walls and partitions increases the transversal stiffness of the vertical elements with respect to the bare frames, making the floor effect not rigid as in framed buildings. 21 Different numerical studies [22][23][24][25][26] or studies based on experimental tests 27 have evaluated the effects of flexible diaphragms on building structures, concluding that the flexible diaphragms affect the buildings in two ways: the dynamic characteristics of the buildings, such as natural frequencies, and the lateral load distributions of the seismic action to the vertical resisting elements.…”

Section: Literature Reviewmentioning

confidence: 99%

The structural identification of the infill walls contribution in the dynamic response of framed buildings

Angelis

Pecce

2019

Struct Control Health Monit

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Summary Reinforced concrete (RC) frame buildings containing unreinforced masonry infill walls are commonly used in structural systems around the world. The performance of this type of building can be significantly affected by the presence of infill walls according to their type and distribution in the plane and along the height as revealed by earthquakes. This paper presents data collection, system identification, and finite element modeling of an existing RC framed building designed for gravity loads and containing unreinforced masonry infill walls. Based on a previously carried out ambient vibration test, a three‐dimensional finite element model, comprising infill walls and partitions, was successfully updated on the basis of the global modes identified by the in situ test, pointing out the important role of the nonstructural components for this type of building. The influence of the infill walls and partitions on the vibration period was examined, introducing a comparison with simple formulations for the period calculation suggested by codes or available in the literature. The updated model has been further used to assess an approach for an approximate estimation of the story and global stiffness of the building considering the effect of the secondary elements. The dynamic test with the model updating results an efficient procedure for a complete identification of the elastic behavior of the structure.

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“…These factors, if modelled adequately in FEMs, can affect the dynamic simulations significantly, as was found, for example, in Chaudhary et al . , Bhattacharya and Dutta , Shakib and Fuladgar , Su et al . and Pan et al .…”

Section: Introductionmentioning

confidence: 99%

Updating of an instrumented building model considering amplitude dependence of dynamic resonant properties extracted from seismic response records

Omenzetter

Butt

2015

Struct. Control Health Monit.

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Summary This paper presents system identification and numerical analyses of a three‐story RC building. System identification was performed using 50 earthquake response records to obtain the frequencies and damping ratios, taking into account soil–structure interaction. Trends in the resonant parameters were correlated with the peak response accelerations at the roof level. A general trend of decreasing resonant frequencies with increasing level of response was observed and quantified, whereas for the damping ratios, no clear trends were discernible. A series of finite element models (FEMs) of the building were updated using a sensitivity‐based method with a Bayesian parameter estimation technique to follow the changes in the resonant frequencies with response amplitude. The FEMs were calibrated by tuning the stiffness of structural and non‐structural components and soil. The updated FEMs were used in time history analyses to predict and assess the building seismic performance at the serviceability limit state. It was concluded that the resonant frequencies depend strongly on the response magnitude, even for low‐to‐moderate levels of shaking. The structural and non‐structural components and soil make contributions to the overall building stiffness that depends on the level of shaking. The FEM calibrated to the largest responses was the least conservative in predicting the serviceability limit state inter‐story drifts, but the building performed satisfactorily. Copyright © 2015 John Wiley & Sons, Ltd.

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Dynamic soil–structure interaction effects on the seismic response of asymmetric buildings

Cited by 33 publications

References 20 publications

Ssi and Sssi Effects in Seismic Analysis of Twin Buildings: Discrete Model Concept

Ssi and Sssi Effects in Seismic Analysis of Twin Buildings: Discrete Model Concept

The structural identification of the infill walls contribution in the dynamic response of framed buildings

Updating of an instrumented building model considering amplitude dependence of dynamic resonant properties extracted from seismic response records

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