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Structural Engineering and Mechanics Volume 10, Number 6, December 2000 , pages 621-633 DOI: https://doi.org/10.12989/sem.2000.10.6.621 |
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Dynamic behaviors of the bridge considering pounding and friction effects under seismic excitations |
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Kim SH, Lee SW, Mha HS
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| Abstract | ||
| Dynamic responses of a bridge system with several simple spans under longitudinal seismic excitations are examined. The bridge system is modeled as the multiple oscillators and each oscillator consists of four degrees-of-freedom system to implement the poundings between the adjacent oscillators and the friction at movable supports. Pounding effects are considered by introducing the impact elements and a bi-linear model is adopted for the friction force. From the parametric studies, the pounding is found to induce complicated seismic responses and to restrain significantly the relative displacements between the adjacent units. The smaller gap size also restricts more strictly the relative displacement. It is found that the relative displacements between the abutment and adjacent pier unit became much larger than the responses between the inner pier units. Consequently, the unseating failure could take a place between the abutment and nearby pier units. It is also found that the relative displacements of an abutment unit to the adjacent pier unit are governed by the pounding at the opposite side abutment. | ||
| Key Words | ||
| bridge system, seismic excitation, pounding, friction, impact element, abutment, unseating failure | ||
| Address | ||
| Kim SH, Yonsei Univ, Dept Civil Engn, Seoul 120749, South Korea Yonsei Univ, Dept Civil Engn, Seoul 120749, South Korea Hoseo Univ, Dept Civil Engn, Asan 336795, South Korea | ||