1) A W10x30, 3.3 m long, A36 steel is used as a column with fixed ends to support a service dead load of 289 kN. Calcul
Posted: Fri Mar 04, 2022 9:49 am
1) A W10x30, 3.3 m long, A36 steel is used as a column with fixed ends to support a service dead load of 289 kN. Calculate the maximum service live load the column can sustain using LRFD. Use theoretical value of k. Write your answer rounded to the nearest whole number in kN.
A = 5,703 mm2
rx = 111.25 mm
ry = 34.80 mm
2)A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yield strength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. Determine the ultimate moment capacity in kN∙m of the beam in negative bending.
42.79
45.07
40.56
47.55
A = 5,703 mm2
rx = 111.25 mm
ry = 34.80 mm
2)A rectangular beam 250 mm wide, 500 mm deep is reinforced at the bottom with 4-20-mm-diameter bars and at the top with 2-16-mm bars. Concrete cover to bar centroid at the top is 80 mm and at the bottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yield strength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. Determine the ultimate moment capacity in kN∙m of the beam in negative bending.
42.79
45.07
40.56
47.55