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111441

Soil-Structure Interaction Effects on Seismic Response of multi-story Buildings on Raft Foundation

Article

Last updated: 04 Jan 2025

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Subjects

-

Tags

Civil Engineering: structural, Geotechnical, reinforced concrete and s…nd sanitary engineering, Hydraulic, Railway, construction Management.

Abstract

The investigation on the energy transfer mechanism from soils to buildings during earthquakes is critical for the design of earthquake resistant structures and for upgrading existing structures. Thus the need for research into Soil-Structure Interaction (SSI) problems is greater than ever. Moreover, recent studies show that the effects of SSI may be detrimental to the seismic response of structure and neglecting SSI in analysis may lead to un-conservative design. Despite this, the conventional design procedure usually involves assumption of fixity at the base of foundation neglecting the flexibility of the foundation, the compressibility of soil mass and consequently the effect of foundation settlement on further redistribution of bending moment and shear force demands. Hence the soil-structure interaction analysis of multi-story buildings is the main focus of this study; the effects of SSI are analyzed for typical multi-story building resting on raft foundation. Three methods of analysis are used for seismic demands evaluation of the target moment resistant frame buildings: equivalent static load (ESL); response spectrum (RS) methods and nonlinear time history (TH) analysis with suit of nine time history records. Three-dimensional FEM model is constructed to analyze the effects of different soil conditions and number of stories on the vibration characteristics and seismic response demands of building structures. Numerical results obtained using soil structure interaction model conditions are compared to those corresponding to fixed-base support conditions. The peak responses of story shear, story moment, story displacement, story drift, moments at beam ends, as well as force of inner columns are analyzed. The analysis results of different approaches are used to evaluate the advantages, limitations, and ease of application of each approach for seismic analysis.

DOI

10.21608/jesaun.2014.111441

Keywords

soil-structure interaction, Seismic design, Egyptian building code, time history, Dynamic analysis, Moment resistant multi-story building, Raft foundation

Authors

First Name

Shehata E

Last Name

Abdel Raheem

MiddleName

-

Affiliation

Civil Engineering Dept, Faculty of Engineering, Assiut University, Assiut 71516

Email

shehataraheem@eng.au.edu.eg

City

Assiut

Orcid

0000-0002-9576-2563

First Name

Mohamed M.

Last Name

Ahmed

MiddleName

-

Affiliation

Civil Eng. Department, Faculty of Engineering, Assiut Univ., Egypt

Email

-

City

-

Orcid

-

First Name

Tarek M.A.

Last Name

Alazrak

MiddleName

-

Affiliation

Civil Eng. Department, Faculty of Engineering, Assiut Univ., Egypt

Email

eng.tarek2011@gmail.com

City

-

Orcid

-

Volume

42

Article Issue

No 4

Related Issue

16854

Issue Date

2014-07-01

Receive Date

2014-04-17

Publish Date

2014-07-01

Page Start

905

Page End

930

Print ISSN

1687-0530

Online ISSN

2356-8550

Article File

JESAUN_Volume 42_Issue No 4_Pages 905-930.pdf

PDF . 1.2MB

Link

https://jesaun.journals.ekb.eg/article_111441.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=111441

Order

1

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

Soil-Structure Interaction Effects on Seismic Response of multi-story Buildings on Raft Foundation

Details

Type

Article

Created At

23 Jan 2023