土壤－結構互制效應對橋梁耐震評估之影響

陳常麒

doi:10.6840/CYCU.2014.00030、10.6840/cycu201401013

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土壤－結構互制效應對橋梁耐震評估之影響

The effect of soil-structure interaction on seismic assessments of briges

陳常麒 , Masters　　Advisor：黃仲偉　　

繁體中文 DOI： 10.6840/CYCU.2014.00030、10.6840/cycu201401013

側推分析；橋梁耐震評估；直接基礎；樁基礎；土壤─結構互制； Pushover analysis ； Seismic assessment ； Direct foundation ； Soil-structure interaction ； Pile foundation

Abstract │ Reference (24) │ Times Cited (3) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

In most analyses and designs, bridge columns are assumed to be rigidly connected to the foundation. In reality, bridge columns, however, are buried into the ground with different foundations. Soil confinements provide limited stiffness which could elongate the natural period of the bridge and magnify the lateral displacements. As a result, the bridge could be damaged due to large displacements. The effect of soil–structure interaction on the seismic assessment of bridges is studied in this study. Nonlinear static pushover analyses and dynamic time history analyses of single column bent bridges are performed by three separate types of finite element models. The first type model assumes that bridge columns are rigidly connected to the foundation while the second type model with pile foundation and the third type model with direct foundation both incorporate soil-structure interactions through the use of equivalent soil springs. In addition, parametric study is carried out to investigate the effects of soil types, buried depth of piles, and foundation sizes on the seismic assessments for bridges. Numerical results demonstrate that the fixed-end bridge designs will generate conservative results while the soil–structure interaction will effectively decrease the ductile ratio of the bridge columns.

Reference ( 24 ) 〈TOP〉

1. AAHTO. “Guide Specifications for LRFD Seismic Bridge Design,” edition 1 (2009).
連結：
2. ATC-40. Seismic Evaluation and Retrofit of Concrete Buildings, Volume 1, Applied Technology Council, Redwood City, California. (1996).
連結：
6. Gulkan P. and Sozen M.A., “Inelastic response of reinforced concrete structures to earthquake motions,” American Concrete Institute Journal, 71(12), pp. 604-610, (1974).
連結：
7. Isaković, T., and Fischinger, M., “Higher modes in simplified inelastic seismic analysis of single column bent viaducts,” Earthquake Engineering and Structural Dynamics, 35(1), pp. 95-114. (2006).
連結：
8. Kowalsky, M.J., “A displacement-based approach for the seismic design of continuous concrete bridges,” Earthquake Engineering and Structural Dynamics, 31(3), pp. 719-747 (2002).
連結：

Times Cited (3) 〈TOP〉

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