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http://dx.doi.org/10.14481/jkges.2022.23.2.13

Calculation of the Earthquake Vulnerability of the Bridge Foundation Considering the Characteristics of the Ground  

Lee, Donggun (Department of Civil Engineering, Inha University)
Song, Kiil (Department of Civil Engineering, Inha University)
Publication Information
Journal of the Korean GEO-environmental Society / v.23, no.2, 2022 , pp. 13-23 More about this Journal
Abstract
The ground-structure interaction of the bridge foundation has been pointed out as a major factor influencing the behavior of the bridge during earthquakes. In this study, the effect of characteristics of ground and bridge foundation on the earthquake vulnerability is investigated. From the pseudo-static analysis, it is confirmed that non-linearity becomes lesser and horizontal load becomes greater when surcharge is considered. It is also found that as the ground worsens and the size of foundation decreases, horizontal load reduces. To derive reasonable structural model for bridge foundation, fragility curve is obtained considering four conditions (fixed condition, equivalent linear condition, non-linear without surchage condition, non-linear with surcharge condition) and compared. Seismic analysis is performed on single pier with Opensees. From the earthquake vulnerability analysis, it is found that shallow foundation can be assumed as fixed condition. In conservative approach, stiffness of spring can be obtained based on Korean highway bridge design code for pile foundation which can consider the ground condition.
Keywords
Fragility curve; Bridge foundation; Earthquake vulnerability; Numerical analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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