Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems
Due to the inherent complexity, the common approach in analyzing nonlinear response of structures with soil–structure interaction (SSI) in current seismic provisions is based on equivalent Single Degree-of-Freedom systems (E-SDOF). This paper aims to study the influence of higher modes on the seismi...
| Main Authors: | , , |
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| Format: | Journal Article |
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World Scientific Publishing
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/9103 |
| _version_ | 1848745852367011840 |
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| author | Ganjavi, B. Hao, Hong Hajirasouliha, I. |
| author_facet | Ganjavi, B. Hao, Hong Hajirasouliha, I. |
| author_sort | Ganjavi, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Due to the inherent complexity, the common approach in analyzing nonlinear response of structures with soil–structure interaction (SSI) in current seismic provisions is based on equivalent Single Degree-of-Freedom systems (E-SDOF). This paper aims to study the influence of higher modes on the seismic response of SSI systems by performing intensive parametric analyses on more than 6400 linear and non-linear Multi Degree-of-Freedom (MDOF) and E-SDOF systems subjected to 21 earthquake records. An established soil-shallow foundation-structure model with equivalent linear soil behavior and nonlinear superstructure has been utilized using the concept of cone models. The lateral strength and ductility demands of MDOF soil–structure systems with different number of stories, structure-to-soil stiffness ratio, aspect ratio and level of inelasticity are compared to those of E-SDOF systems. The results indicate that using the common E-SDOF soil–structure systems for estimating the strength and ductility demands of medium and slender MDOF structures can lead to very un-conservative results when SSI effect is significant. This implies the significance of higher mode effects for soil–structure systems in comparison with fixed-based structures, which is more pronounced for the cases of elastic and low level of inelasticity. |
| first_indexed | 2025-11-14T06:23:56Z |
| format | Journal Article |
| id | curtin-20.500.11937-9103 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:23:56Z |
| publishDate | 2016 |
| publisher | World Scientific Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-91032018-03-29T09:05:56Z Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems Ganjavi, B. Hao, Hong Hajirasouliha, I. Due to the inherent complexity, the common approach in analyzing nonlinear response of structures with soil–structure interaction (SSI) in current seismic provisions is based on equivalent Single Degree-of-Freedom systems (E-SDOF). This paper aims to study the influence of higher modes on the seismic response of SSI systems by performing intensive parametric analyses on more than 6400 linear and non-linear Multi Degree-of-Freedom (MDOF) and E-SDOF systems subjected to 21 earthquake records. An established soil-shallow foundation-structure model with equivalent linear soil behavior and nonlinear superstructure has been utilized using the concept of cone models. The lateral strength and ductility demands of MDOF soil–structure systems with different number of stories, structure-to-soil stiffness ratio, aspect ratio and level of inelasticity are compared to those of E-SDOF systems. The results indicate that using the common E-SDOF soil–structure systems for estimating the strength and ductility demands of medium and slender MDOF structures can lead to very un-conservative results when SSI effect is significant. This implies the significance of higher mode effects for soil–structure systems in comparison with fixed-based structures, which is more pronounced for the cases of elastic and low level of inelasticity. 2016 Journal Article http://hdl.handle.net/20.500.11937/9103 10.1142/S1793431116500068 World Scientific Publishing restricted |
| spellingShingle | Ganjavi, B. Hao, Hong Hajirasouliha, I. Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title | Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title_full | Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title_fullStr | Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title_full_unstemmed | Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title_short | Influence of Higher Modes on Strength and Ductility Demands of Soil–Structure Systems |
| title_sort | influence of higher modes on strength and ductility demands of soil–structure systems |
| url | http://hdl.handle.net/20.500.11937/9103 |