Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures
Effect of soil-structure interaction (SSI) and site condition on elastic and inelastic seismic demands of structure is investigated in this research. More emphasis is on Effect of soil-structure interaction and site condition is assessed by using earthquakes recorded on different site classes C, D a...
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| Format: | Article |
| Language: | fas |
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Semnan University
2016-03-01
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| Series: | مجله مدل سازی در مهندسی |
| Subjects: | |
| Online Access: | https://modelling.semnan.ac.ir/article_1751_3757932436cf19c567e57218756919bf.pdf |
| _version_ | 1797296630699917312 |
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| author | Javad Vaseghi Amiri Leila Khanmohammadi Mohammad Ali Ghannad mohammadreza davoodi |
| author_facet | Javad Vaseghi Amiri Leila Khanmohammadi Mohammad Ali Ghannad mohammadreza davoodi |
| author_sort | Javad Vaseghi Amiri |
| collection | DOAJ |
| description | Effect of soil-structure interaction (SSI) and site condition on elastic and inelastic seismic demands of structure is investigated in this research. More emphasis is on Effect of soil-structure interaction and site condition is assessed by using earthquakes recorded on different site classes C, D and E (NEHRP [1]) where SSI has a significant effect on the structural demands because of noticeable difference between the stiffness of soil and the structure. In order to develop a comprehensive statistical parametric study, the structure is modeled as an elastic-plastic single degree of freedom (SDOF) system and the soil beneath the foundation is supposed as a homogeneous half space and is idealized by fundamental lumped mass parameters based on the concepts of the cone model (Wolf, 1994[17]). To consider the frequency dependency of soil’s dynamic stiffness in this model, the soil is represented with a three-DOF system that introducing an internal DOF in the soil can represent this effect. Then the whole of soil-structure model is analyzed under 45 earthquakes recorded on previously mentioned site classes. A parametric study is done for a wide range of non-dimensional parameters controlling the SSI effects on structural demands. It is concluded that SSI affects on structural seismic demands such as elastic and inelastic strength, strength reduction factor, ductility demand, and inelastic displacement ratio especially for structures located on site class E. Results exhibit remarkable differences in comparison to fixed base one. Consequently, in some cases, using parameters derived for fixed base case, lead to non-conservative results in design and assessment parameters of structures located on soft soils. |
| first_indexed | 2024-03-07T22:07:33Z |
| format | Article |
| id | doaj.art-ca03fd46c4a943ee9f584fbfb0bd16a7 |
| institution | Directory Open Access Journal |
| issn | 2008-4854 2783-2538 |
| language | fas |
| last_indexed | 2024-03-07T22:07:33Z |
| publishDate | 2016-03-01 |
| publisher | Semnan University |
| record_format | Article |
| series | مجله مدل سازی در مهندسی |
| spelling | doaj.art-ca03fd46c4a943ee9f584fbfb0bd16a72024-02-23T19:00:32ZfasSemnan Universityمجله مدل سازی در مهندسی2008-48542783-25382016-03-011444496710.22075/jme.2017.17511751Effect of soil-structure interaction on seismic demands of structures in evaluation and design proceduresJavad Vaseghi Amiri0Leila Khanmohammadi1Mohammad Ali Ghannad2mohammadreza davoodi3دانشگاه صنعتی بابلدانشگاه صنعتی بابلدانشگاه صنعتی شریفdont haveEffect of soil-structure interaction (SSI) and site condition on elastic and inelastic seismic demands of structure is investigated in this research. More emphasis is on Effect of soil-structure interaction and site condition is assessed by using earthquakes recorded on different site classes C, D and E (NEHRP [1]) where SSI has a significant effect on the structural demands because of noticeable difference between the stiffness of soil and the structure. In order to develop a comprehensive statistical parametric study, the structure is modeled as an elastic-plastic single degree of freedom (SDOF) system and the soil beneath the foundation is supposed as a homogeneous half space and is idealized by fundamental lumped mass parameters based on the concepts of the cone model (Wolf, 1994[17]). To consider the frequency dependency of soil’s dynamic stiffness in this model, the soil is represented with a three-DOF system that introducing an internal DOF in the soil can represent this effect. Then the whole of soil-structure model is analyzed under 45 earthquakes recorded on previously mentioned site classes. A parametric study is done for a wide range of non-dimensional parameters controlling the SSI effects on structural demands. It is concluded that SSI affects on structural seismic demands such as elastic and inelastic strength, strength reduction factor, ductility demand, and inelastic displacement ratio especially for structures located on site class E. Results exhibit remarkable differences in comparison to fixed base one. Consequently, in some cases, using parameters derived for fixed base case, lead to non-conservative results in design and assessment parameters of structures located on soft soils.https://modelling.semnan.ac.ir/article_1751_3757932436cf19c567e57218756919bf.pdfsoil-structure interactionsoil’s dynamic stiffnessfrequency dependency of soil’s stiffnesselastic and inelastic strengthstrength reduction factorductility demandand inelastic displacement ratio |
| spellingShingle | Javad Vaseghi Amiri Leila Khanmohammadi Mohammad Ali Ghannad mohammadreza davoodi Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures مجله مدل سازی در مهندسی soil-structure interaction soil’s dynamic stiffness frequency dependency of soil’s stiffness elastic and inelastic strength strength reduction factor ductility demand and inelastic displacement ratio |
| title | Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures |
| title_full | Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures |
| title_fullStr | Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures |
| title_full_unstemmed | Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures |
| title_short | Effect of soil-structure interaction on seismic demands of structures in evaluation and design procedures |
| title_sort | effect of soil structure interaction on seismic demands of structures in evaluation and design procedures |
| topic | soil-structure interaction soil’s dynamic stiffness frequency dependency of soil’s stiffness elastic and inelastic strength strength reduction factor ductility demand and inelastic displacement ratio |
| url | https://modelling.semnan.ac.ir/article_1751_3757932436cf19c567e57218756919bf.pdf |
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