Question 9 3 Points This Is A 3 Point Question Consider A Column Laterally Braced Against Sidesway As Shown Below The 1 (127.56 KiB) Viewed 28 times
Question 9 (3 points) This is a 3 POINT question Consider a column laterally braced against sidesway as shown below. The column has a cross section of 500x500 mm with f'c = 30 MPa. The specified (unfactored) dead & live loads on the column are as shown below. The moments result in single curvature. L = 4.3 m 1800 mm 500 mm 1 150 500 mm 400 Beam Section (b) L = 9.0 m 375 mm 12-25M 500 mm 500 mm L = 4.3 m 500 mm = 7.0 m = 7.0 m Column Section Unfactored Loads Dead load Live load 1000 500 Axial load (kN) Top moment (Nm) Bottom moment (kN-m) 100 50 56 20
Using the load combination (1.25D +1.5L), determine the following: kin Blank 1: ratio. (Note: Use L = clear span. In calculating r use h = 500 mm). = r Blank 2: Axial load Pf in KN (Note: use factored loads with 1.250 +1.5L) Blank 3: M1/M2 ratio (Note: use factored moments with 1.25D +1.5L) M 25-10 M Blank 4: The ratio Pf fcag (keep one decimal, i.e. 25.8 not 26) Blank 5: Is the column slender (answer with Y or N)
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