Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake
The seismic behavior of pile-supported structures is influenced by complex interactions between inertial force and kinematic force mainly drawn by soil properties and superstructure characteristics. This study aims to investigate the combined effects of inertial and kinematic interaction on the dyna...
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MDPI AG
2025-05-01
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| author | Sun-Yong Kwon |
| author_facet | Sun-Yong Kwon |
| author_sort | Sun-Yong Kwon |
| collection | DOAJ |
| description | The seismic behavior of pile-supported structures is influenced by complex interactions between inertial force and kinematic force mainly drawn by soil properties and superstructure characteristics. This study aims to investigate the combined effects of inertial and kinematic interaction on the dynamic response of pile foundations under seismic loading. To achieve this, three-dimensional numerical simulations were conducted using FLAC3D, based on a bridge substructure model. A total of twelve analysis cases were developed by varying input seismic motion levels, soil relative densities, and pile cap masses. The results demonstrate that kinematic force effects become more dominant in dense soils as seismic intensity increases, resulting in greater velocity responses and internal forces in the pile cap. Meanwhile, inertial forces from heavier superstructures interacted with kinematic force effects in a resistive manner, particularly under embedded pile cap conditions. The displacement of pile foundations remained within serviceable limits in all cases, although structural demands would be elevated under certain conditions. These findings confirm the significance of accounting for both inertial and kinematic effects in seismic design and highlight the importance of site-specific soil conditions. |
| format | Article |
| id | doaj-art-76f95d66e8f2462f918beaa14fb062b3 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-76f95d66e8f2462f918beaa14fb062b32025-08-20T03:49:22ZengMDPI AGApplied Sciences2076-34172025-05-01159508510.3390/app15095085Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under EarthquakeSun-Yong Kwon0Korea Environment Institute, Sejong 30147, Republic of KoreaThe seismic behavior of pile-supported structures is influenced by complex interactions between inertial force and kinematic force mainly drawn by soil properties and superstructure characteristics. This study aims to investigate the combined effects of inertial and kinematic interaction on the dynamic response of pile foundations under seismic loading. To achieve this, three-dimensional numerical simulations were conducted using FLAC3D, based on a bridge substructure model. A total of twelve analysis cases were developed by varying input seismic motion levels, soil relative densities, and pile cap masses. The results demonstrate that kinematic force effects become more dominant in dense soils as seismic intensity increases, resulting in greater velocity responses and internal forces in the pile cap. Meanwhile, inertial forces from heavier superstructures interacted with kinematic force effects in a resistive manner, particularly under embedded pile cap conditions. The displacement of pile foundations remained within serviceable limits in all cases, although structural demands would be elevated under certain conditions. These findings confirm the significance of accounting for both inertial and kinematic effects in seismic design and highlight the importance of site-specific soil conditions.https://www.mdpi.com/2076-3417/15/9/5085group pile-supported structureseismic responsesoil–structure interactionkinematic forceinertial forcesoil relative density |
| spellingShingle | Sun-Yong Kwon Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake Applied Sciences group pile-supported structure seismic response soil–structure interaction kinematic force inertial force soil relative density |
| title | Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake |
| title_full | Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake |
| title_fullStr | Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake |
| title_full_unstemmed | Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake |
| title_short | Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake |
| title_sort | effect of inertial and kinetic forces of a soil pile structure system on the behavior of a superstructure under earthquake |
| topic | group pile-supported structure seismic response soil–structure interaction kinematic force inertial force soil relative density |
| url | https://www.mdpi.com/2076-3417/15/9/5085 |
| work_keys_str_mv | AT sunyongkwon effectofinertialandkineticforcesofasoilpilestructuresystemonthebehaviorofasuperstructureunderearthquake |