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http://dx.doi.org/10.7843/kgs.2022.38.9.5

A Study of Soil Spring Model Considering the Seismic Load in Response Spectrum Analysis of Pile-Supported Structure  

Yun, Jung-Won (Dept. of Civil Engrg., Korea Army Academy at Yeongcheon)
Kim, Jongkwan (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology)
Lee, Seokhyung (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology)
Han, Jin-Tae (Dept. of Geotechnical Engrg. Research, Korea Institute of Civil Engrg. and Building Technology)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.9, 2022 , pp. 5-17 More about this Journal
Abstract
Recently, several studies have been conducted on virtual fixed-point and elastic soil spring methods to simulate the soil-pile interaction in response to spectrum analysis of pile-supported structures. However, the soil spring stiffness has not been properly considered due to the seismic load magnitude, and studies on the response spectrum analysis of pile-supported structures considering this circumstance are inadequate. Therefore, in this study, the response spectrum analysis was performed considering the soil spring stiffness according to the seismic load magnitude, and the dynamic behavior of the pile-supported structure was evaluated by comparing it with existing virtual fixed-point and elastic soil spring methods. Comparing the experiment and analysis, the moment differences occurred up to 117% and 21% in the virtual fixed-point and elastic soil spring models, respectively. Moreover, when the analysis was performed using an API p-y curve considering the soil spring stiffness according to the seismic load magnitude, the moment difference between the experiment and analysis was derived at a maximum of < 4%, and it is the most accurate method to simulate the experimental model response.
Keywords
Dynamic centrifuge model test; Pile-supported structure; Response spectrum analysis; Seismic design; Soil spring model;
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