xed at top is subjected to ultimate load of 3000 kN f = 25 N/mm², fy=360 1/mm², fys=360 N/mm², Design the column showing all necessary details.
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- I. Calculate the safe concentrated live load at the free end for a rectangular cantilever beam 3 m long with a width of 300 mm and effective depth of 500 mm with protective covering of 60 mm. Steel reinforcements consist of 6 – 32 mm diameter bars. fc'= 27.6 MPa, fy = 414 MPa. Weight of concrete is 23.5 KN/m3. II. Using working stress for problem I, what will be the safe moment that it can carry. Calculate the safe concentrated live load at the free end for a rectangular cantilever beam 3 m long with a width of 300 mm and effective depth of 500 mm with protective covering of 60 mm. Steel reinforcements consist of 6 – 32 mm diameter bars. fc'= 27.6 MPa, fy = 414 MPa. Weight of concrete is 23.5 KN/m?. Using working stress for problem I, what will be the safe moment that it can carry.A built up column consist of two channels C 450 x 42.7 and one cover plate 500 mm x 12 mm. The channels are placed 300 mm back to back with the flanges outstanding. The height of the Column is 6 m with k=1.0. Determine the axial load capacity of the column. Fy = 248 MPa, E = 200 GPa 500 mm 300 mm 12 mm - 450 mm CIVIL ENGINEERING STEEL DESIGN Properties of C 450 x 42.7 A = 8129.02 mm² 2 = 230.59x106mmª 1x² I₁ = 5.99x106mmª y x = 22.28mm4 in. 200 kip 3 ft - The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. If the column is subjected to an axial force of 200 kip, determine the average normal stress in the concrete and in each rod. Each rod has a diameter of 1 in - change the applied force of 200 kip to 185.7 kip - change original diameter of each steel rod of 1 in to 1.35 in
- A reinforced concrete spiral column carries dead axial load of 600 kN and a live axial load of 9000kN. f’c = 28 Mpa; fy = 415 Mpa. a. What is the factored axial load carried by the column? b. What is the minimum diameter of the column if it has a steel ratio of 0.015? c. Find the number of 20 mm diameter bar that will be used if it is the reinforcement of the column.Situation. A flooring system consists of parallel I-beam sections spaced at 3 m. on centers simply supported over a span of 9 m. The beam supports a 200 mm thick concrete slab of ultimate strength f'c = 21 MPa. The flooring system is designed for as ceiling and floor load of 750 N/m². The properties of the I-beam sections are: A = 11,500 mm² d = 350 mm; tw = 10 mm bf = 250 mm; t = 16 mm lx = 266x106 mm4 ly = 45 x 106 mm4 fy = 248 MPal Wb = 90 kg/m fy = 248MPa If each beam is laterally braced by the concrete slab, calculate the allowable bending strength using safety factor of 1.67. Select the correct response: 175.17 248.79 235.94 394.03Situation. A flooring system consists of parallel I-beam sections spaced at 3 m. on centers simply supported over a span of 9 m. The beam supports a 200 mm thick concrete slab of ultimate strength fc = 21 MPa. The flooring system is designed for as ceiling and floor load of 750 N/m². The properties of the I-beam sections are: A = 11,500 mm² d = 350 mm; tw = 10 mm bf = 250 mm; t+= 16 mm lx = 266x106 mm4 ly = 45 x 106 mm4 fy = 248 MPa Wp = 90 kg/m. fy = 248MPa Calculate the service floor live load (kPa) each beam can sustain under LRFD method using a resistance factor of 0.90. Select the correct response: 221 1.92 7.05 2.92
- = A tied column which is subjected to an eccentric load has dimensions of 300 mm x 500 mm which is reinforced with 4 - 28 mm Ø bars arranged as shown in the figure. The concrete cylinder strength f 27.6 MPa and the steel yield strength fy = 414.7 MPa. The column carries a nominal load P₁ at an eccentricity "e" from the y-axis of the column section. If the neutral axis is 125 mm from the right edge of the column section. Neglect the area of concrete displaced by the compression steel bar. 300 mm 62.5 Tension Bars 187.5 187.5 62.5 4-28 mun o 500 mm e Compression Bars Pn Determine the value of the nominal load Pn. 2 Determine the nominal moment capacity of the column section. 3 Determine the eccentricity "e" where the nominal load is acting. Solution:Situation. A flooring system consists of parallel I-beam sections spaced at 3 m. on centers simply supported over a span of 9 m. The beam supports a 200 mm thick concrete slab of ultima strength fc = 21 MPa. The flooring system is designed for as ceiling and floor load of 750 N/m². The properties of the I-beam sections are: A = 11,500 mm² d = 350 mm; tw = 10 mm bf = 250 mm; t+= 16 mm lx = 266x105 mm4 ly = 45 x 105 mm4 fy = 248 MPa Wb = 90 kg/m fy = 248MPa Calculate the service floor live load (kPa) each beam can sustain in bending under allowable stress design method. Select the correct response: 7.05 2.91 C CUN 2.21 1.92b) The floor system shown is subjected to a total uniform distributed load of 20 kN/m². Sketch the loading that acts along the members and CDE. 2 m E 3 m F G H 4 m 3 m
- The prestress T-beam section has a simple span of 6 m. The tendons is subjected to an initial stress of 900 MPa with an area of 800 mm?. Assuming a loss of stress of 18%, no tension will be acting at the bottom and a maximum stress of 9.5 MPa at the top should not exceeded. -450 00 800 100 150- Determine the safe uniform live load that the beam could carry if the unit weight of concrete = 24 kN/m?. (kN/m)Calculate the safe concentrated live load at the free end for a rectangular cantilever beam 3 m long with a width of 300 mm and effective depth of 500 mm with protective covering of 60 mm. Steel reinforcements consist of 6-32 mm diameter bars. fc'= 27.6 MPa, fy = 414 MPa. Weight of concrete is 23.5 KN/m. Using working stress for problem I, what will be the safe moment that it can carry.A hall is covered by a beam and slab system with beams placed at 3.0 m centers. The effective span of the beam is 8.35 m. the thickness of the slab is 120 mm. The size of the beam below the slab is 230 mm width and 380 mm depth. The beam is reinforced with two numbers of 32 mm diameter steel rods of grade 415 N/mm2. Compute the Maximum total load/m run, the beam can carry, including its own weight at service stage. Grade of concrete is M 25.