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5장압축재(Columns)1.Introduction-Combined axial load and bending2.Short columns3.Slender columns

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5장 압축재(Columns)

1. Introduction-Combined axial load and bending

2. Short columns 3. Slender columns

단순하게 압축력만 지지하는 압축재는 거의 없음, 대부분의 기둥이 편심 또는 작용 모멘트에 의해 휨-압축 상태

2016-05-10_ccs

• Introduction

• Tied and Spiral Columns

• P-M Interaction Diagrams (for Concrete Columns)

• Design of Short Columns

• Contributions of Steel and Concrete to Column Strength

• Approximate Solution for Tied Columns Failing in Compression

• Biaxially Loaded Columns

What??

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[Definition and role of the columns]

• Vertical Structural members

• Transmits axial compressive loads with or without

moment

• transmit loads from the floor & roof to the foundation

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띠철근(Hoop) 나선철근(Spiral) 파괴형상

J.G. MacGregor J.G. MacGregor

Hoop

Tie Columns

- 95% of all columns in buildings are tied

Spiral Columns

• spiral restrains lateral (Poisson’s effect)

• axial load  delays failure (ductile)

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