AECT250-Lecture 34

AECT250-Lecture 34 - Lecture 34 Columns (cont.) In the...

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Lecture 34 - Page 1 of 12 Lecture 34 – Columns (cont.) In the previous lecture, we talked about columns having small eccentricity (i.e., small applied moment). While this may be the case for interior columns with offsetting moments, the majority of concrete columns do experience applied moments . Concrete framed buildings typically have columns that are poured monolithically with beams and slabs, thus creating a statically-indeterminate frame such as the one shown below: The analysis of such a frame is usually quite complex and requires computer software such as STAAD or approximate analysis methods such as the Portal Method and others discussed in AECT 210 – Structural Theory Lecture 17 .
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Lecture 34 - Page 2 of 12 The compression capacity of a reinforced column is reduced by the bending stresses on the column and vice-versa. A graph of the axial load capacity of a column vs. the moment capacity of a typical column is shown below (from Lecture 33): Determining points along the curve is quite laborious and typically not done using hand calculations. Instead, computer programs or design guides are used to perform column analysis and design. Below are some “Column Interaction Diagrams” that are used for column
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This note was uploaded on 05/05/2009 for the course AE AE250 taught by Professor Hultenius during the Fall '08 term at SUNY Delhi.

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AECT250-Lecture 34 - Lecture 34 Columns (cont.) In the...

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