橋梁基礎搖擺機制之初步研究

何姿慧

doi:10.6342/NTU.2009.00072

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橋梁基礎搖擺機制之初步研究

Preliminary Study of Rocking Bridge Foundation

何姿慧 , Masters　　Advisor：張國鎮　　

繁體中文 DOI： 10.6342/NTU.2009.00072

直接基礎；搖擺基礎；擬動態試驗；反覆載重試驗；隔震； spread foundation ； rocking foundation ； pseudo-dynamic test ； cyclic test ； seismic isolation

Abstract │ Reference (40) │ Altmetrics

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Some recent studies have shown that rocking of spread foundation has beneficial effect on the dynamic performance of columns by decreasing the plastic deformation occurring at the plastic zone. This implies that the ductility demand of columns can possibly be reduced. However, rocking is still not an acceptable mode of response in design code generally. In order to gain better understanding of the problem of rocking, and in turn have more confidence in taking its benefit into consideration during design and retrofit process, a series of rocking experiments were performed and an analytical model was established. These rocking experiments include two pseudo-dynamic tests followed by a cycling test. From these tests, the rocking behaviors of a column undergoing different levels of earthquake were obtained. In addition, an analytical model which can take the nonlinear interaction between foundation and underlying soil into account was also established using Sap2000N. This analytical model was validated through the comparison with the experimental data. Using this analytical model, a parametric study was performed and the influence of foundation size and soil spring stiffness on rocking behavior was discussed.

Reference ( 40 ) 〈TOP〉

【 5 】 FEMA (1997), NEHRP Guidelines and Commentary for the Seismic Rehabilitation of Buildings, Reports No. 273, Washington, D.C.
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【 7 】 AASHTO (2002), Standard Specifications for Highway Bridges, 17th Edition, American Association of State Highway and Transportation Officials.
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【 9 】 Priestley, M. J. N., Seible, F. And Calvi, G. M. (1996), Seismic Design and Retrofit of Bridges, John Wiley & Sons, Inc.
連結：
【 12 】 Yim, C. S., Chopra, A. K. and Panzien, J. (1980), “Rocking Response of Rigid Blocks to Earthquakes”, Earthquake Engineering and Structural Dynamics, 8, pp.565-587.
連結：
【 13 】 Tso, W. K. and Wong, C. M. (1989), “Steady State Rocking Response of Rigid Blocks, Part I: Analysis”, Earthquake Engineering and Structural Dynamics, 18, pp.89-106.
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