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논문 기본 정보

자료유형
학술저널
저자정보
Quoc Van Nguyen (University of Technology Sydney (UTS)) Behzad Fatahi (University of Technology Sydney (UTS)) Aslan S. Hokmabadi (Ove Arup & Partners)
저널정보
국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.58 No.6
발행연도
2016.1
수록면
1,045 - 1,075 (31page)

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초록· 키워드

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Shallow footings are one of the most common types of foundations used to support mid-rise buildings in high risk seismic zones. Recent findings have revealed that the dynamic interaction between the soil, foundation, and the superstructure can influence the seismic response of the building during earthquakes. Accordingly, the properties of a foundation can alter the dynamic characteristics (natural frequency and damping) of the soil-foundation-structure system. In this paper the influence that shallow foundations have on the seismic response of a mid-rise moment resisting building is investigated. For this purpose, a fifteen storey moment resisting frame sitting on shallow footings with different sizes was simulated numerically using ABAQUS software. By adopting a direct calculation method, the numerical model can perform a fully nonlinear time history dynamic analysis to realistically simulate the dynamic behaviour of soil, foundation, and structure under seismic excitations. This three-dimensional numerical model accounts for the nonlinear behaviour of the soil medium and structural elements. Infinite boundary conditions were assigned to the numerical model to simulate free field boundaries, and appropriate contact elements capable of modelling sliding and separation between the foundation and soil elements are also considered. The influence of foundation size on the natural frequency of the system and structural response spectrum was also studied. The numerical results for cases of soil-foundation-structure systems with different sized foundations and fixed base conditions (excluding soil-foundation-structure interaction) in terms of lateral deformations, inter-storey drifts, rocking, and shear force distribution of the structure were then compared. Due to natural period lengthening, there was a significant reduction in the base shears when the size of the foundation was reduced. It was concluded that the size of a shallow foundation influences the dynamic characteristics and the seismic response of the building due to interaction between the soil, foundation, and structure, and therefore design engineer should carefully consider these parameters in order to ensure a safe and cost effective seismic design.

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참고문헌 (50)

참고문헌 신청
ABAQUS / 2012 / Abaqus Analysis User's Manual / Dassault Systèmes Simulia Corp google schola 2008 / ACI318-08, Building Code Requirements for Structural Concrete and Commentary / American Concrete Institute google schola 2007 / AS1170.4, Structural design actions-Earthquake actions in Australia / Standards Australia google schola 2009 / AS2149, Pilling-Design and installation / Standards Australian google schola 2009 / AS3600, Concrete Structures / Standards Australia google schola

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