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논문 기본 정보

자료유형
학술저널
저자정보
El Abbas, Nadia (Department of Physics, Laboratory of Civil Engineering and Mechanics, Faculty of Science and Techniques) Khamlichi, Abdellatif (Department of STIC, National School of Applied Sciences) Bezzazi, Mohammed (Department of Physics, Laboratory of Civil Engineering and Mechanics, Faculty of Science and Techniques)
저널정보
테크노프레스 Coupled systems mechanics Coupled systems mechanics 제5권 제4호
발행연도
2016.1
수록면
285 - 304 (20page)

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초록· 키워드

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The effects of large rotations and p-delta on the dynamic response of a structure subjected to seismic loading and local uplift of its foundation were analyzed in this work. The structure was modeled by an equivalent flexible mat mounted on a rigid foundation that is supported either by a Winkler soil type or a rigid soil. The equations of motion of the system were derived by taking into account the equilibrium of the coupled foundation-mat system where the structure was idealized as a single-degree-of-freedom. The obtained nonlinear coupled system of ordinary differential equations was integrated by using an adequate numerical scheme. A parametric study was performed then in order to evaluate the maximum response of the system as function of the intensity of the earthquake, the slenderness of the structure, the ratio of the mass of the foundation to the mass of the structure. Three cases were considered: (i) local uplift of foundation under large rotation with the p-delta effect, (ii) local uplift of foundation under large rotation without including the p-delta effect, (iii) local uplift of foundation under small rotation. It was found that, in the considered ranges of parameters and for moderate earthquakes, assuming small rotation of foundation under seismic loading can yield more adverse structural response, while the p-delta effect has almost no effect.

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