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| Seismic response of bridge pier on rigid caisson foundation in soil stratum | |
| 作者姓名： | C. Tsigginos N. Gerolymos D. Assimaki G. Gazetas |
| 作者单位： | National Technical University of Athens Greece Civil Engineer，Civil Engineering National Technical University of Athens Greece Lecturer，Civil Engineering Georgia Institute of Technology Atlanta USA Assistant Professor，Civil Engineering National Technical University of Athens Greece Professor |
| 基金项目： | U.S. Federal Highway Administration，美国国家自然科学基金 |
| 摘 要： | An analytical method to study the seismic response of a bridge pier supported on a rigid caisson foundation embedded in a deep soil stratum underlain by a homogeneous half space is developed. The method reproduces the kinematic and inertial responses, using translational and rotational distributed Winkler springs and dashpots to simulate the soil-caisson interaction. Closed-form solutions are given in the frequency domain for vertical harmonic S-wave excitation. Comparison with results from finite element （FE） analysis and other available solutions demonstrates the reliability of the model. Results from parametric studies are given for the kinematic and inertial responses. The modification of the fundamental period and damping ratio of the bridge due to soil-structure interaction is graphically illustrated. |
| 关 键 词： | 沉箱 地基 运动学响应 地震 |
| 收稿时间： | 25 January 2008 |
| 修稿时间： | 2 February 2008 |
Seismic response of bridge pier on rigid caisson foundation in soil stratum |
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| C. Tsigginos,N. Gerolymos,D. Assimaki,G. Gazetas.Seismic response of bridge pier on rigid caisson foundation in soil stratum[J].Earthquake Engineering and Engineering Vibration,2008,7(1):33-43. | |
| Authors: | C Tsigginos N Gerolymos D Assimaki G Gazetas |
| Institution: | 1. National Technical University of Athens, Greece 2. Civil Engineering, National Technical University of Athens, Greece 3. Civil Engineering, Georgia Institute of Technology, Atlanta, USA |
| Abstract: | An analytical method to study the seismic response of a bridge pier supported on a rigid caisson foundation embedded in a deep soil stratum underlain by a homogeneous half space is developed. The method reproduces the kinematic and inertial responses, using translational and rotational distributed Winkler springs and dashpots to simulate the soil-caisson interaction. Closed-form solutions are given in the frequency domain for vertical harmonic S-wave excitation. Comparison with results from finite element (FE) analysis and other available solutions demonstrates the reliability of the model. Results from parametric studies are given for the kinematic and inertial responses. The modification of the fundamental period and damping ratio of the bridge due to soil-structure interaction is graphically illustrated. |
| Keywords: | caisson embedded foundations kinematic response inertial response Winkler model effective period effective damping |
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