Situation #a A concrete co lumn has a diameter 4 300mm. The Column has 6 6teel rinforcing bars. Each reiforcing bar has a Crocs-sectional area 4 J0o mm2.The column is I15om lorg ard has a load 14 1,370 kn applied to a igid steel plate af the top the column. The plati distributes the load evenly over the top 4 the cotumn) E,> J00 GPa ard Eç= a5G Pa Find the sfress in the 8teel ard in the concrete ard the deformation urder the load.
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A: Solution:- Neutral axis of section, b.x22=m×As×d-x250x22=8×1530×600-xx2+97.92-58752=0x=198.32 mm…
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Q: Q.1: By using LRFD method: A. Determine the max. load (P) can be applied on the structure shown in…
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Q: A column section I.S.H.B. 350 @ 661.2 N/m carries an axial load of 1100 kN. Design a suitable gusset…
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Q: Example : 5.2 A column section I.S.H.B. 350 @ 661.2 N/m carries an axial load of 1100 KN. Design a…
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Q: Design a rectangular beam to carry a live load of 1.5 kips/ft amd a dead load of 1.5 kips/ft, in…
A: Given Data Live load= 1.5 Kips/ft Dead Load= 1.5 Kips/ft Span length= 32 ft F'c= 4000 psi Fy= 60000…
Q: Light-grade steel channel was used as a purlin of a truss. The top chord of the truss is inclined I…
A: We will solve this question in step no. 2
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Topic: Statistically indeterminate members
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- If column AB is made from high strength pre-castconcrete and reinforced with four 20 mm diameter A-36steel rods, determine the maximum allowable floorloadings P. The allowable normal stress for the highstrength concrete and the steel are (ϭallow)con = 18 MPaand (ϭallow)st= 170 MPa, respectively.The beam is simply supported on a span of 6 m and carries a load of 18 KN/m. Use ACI Specifications withfc’ = 17.2 MPa, fs = 124 MPa, n = 12, d’ = 65 mm, and ?concrete = 23.54 KN/m3.(a) service moment (f) use b = 250 mm, d = Answer (round down to nearest 25 mm) + 50 mm(b) fc to take care of dead load(c) k (g) h (h) dead load (i) total load(d) j (j) recompute service moment (k) check effective depth(e) R (l) use 28mmɸ for As (m) check main bar clear spacingA rectangular beam 250 mm wide, 500 mm deep is reinforced at thebottom with 4-20-mm-diameter bars and at the top with 2-16-mmbars. Concrete cover to bar centroid at the top is 80 mm and at thebottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yieldstrength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. 2. Determine the design moment capacity of the beam in positivebending. = [m] kN∙m (whole number)
- A rectangular beam 250 mm wide, 500 mm deep is reinforced at thebottom with 4-20-mm-diameter bars and at the top with 2-16-mmbars. Concrete cover to bar centroid at the top is 80 mm and at thebottom is 70 mm. Use concrete strength f’c = 21 MPa and steel yieldstrength fy = 415 MPa for 20-mm bars and fy = 275 MPa for 16-mm bars. 1. Determine the limiting tensile steel ratio for a tension controlledcondition in positive or negative bending with the given materialstrengths. ρt = [r] in 5 decimal places (ex. 0.00001)(a) The detached servant room of a quarter is having internal size of 3.0mxx4.50m. It is to be covered by a roof of RCC. The dead load on roof 4.5kN//m^(2) and the live load is 1.50kN//m^(2) Design the slab by I.S. Code method. Assume grade of concrete as M25 and grade of Steel as Fe415.5. A doubly reinforced rectangular beam has 3 - 20 mmɸ compression bars and 6 - 28 mmɸ.The breadth and overall depth are 410 mm and 650 mm respectively. Use 10 mmɸ stirrups,40 concrete cover, fc’ = 20.7 MPa, and fy = 345 MPa. Calculate the following(a) d (b) As’ (c) cbalance(d) a (e) fs’ (f) Cc(g) Cs(h) Abalance(i) check if compression steel yields (fs’ > fy)(j) design strength of the beam ( ? Mn)
- 1. A rectangular reinforced concrete beam has a length of 7.5 – 10.5 m. It is supported with a hinged at one end and a roller 2m from the other end. The width of beam is 350 mm and the overall depth is 550 mm. The beam is reinforced with 5D25 tensionreinforcement and 2D25 compression reinforcement located at 60 mm from the outermostfiber of the beam. The concrete strength fc = 28 MPa and steel yield fy= 390 MPa. Determinethe following:a. Sketch the beam and its cross sectionb. Stress in the compression steel.c. Moment capacity of the beam.d. Factored uniform load throughout the entire span of the beam that could carry.A rectangular concrete beam has a width of 300 mm and an effective depth of 550 mm. The beam is simply supported over a span of 6 m and is used to carry a uniform dead load of 25 KN/m and a uniform live load of 40 kN/m. Assume fic= 21 MPa and fx = 312 MPa. Compression reinforcement if necessary shall be placed at a depth of 80 mm from the extreme compression concrete. Which of the following most nearly gives the required tension steel area? A. 3743.38 mm2 B. 3626.05 mm2 C. 3324.24 mm2 D. 2915.15 mm2A short rectangular column 300 mm on one side and 400 mm on the other side. It is reinforced with 8-20-mm-diameter longitudinal bars equally distributed to the shorter sides of the column. The centroid of the bars are 70 mm from the concrete surface. Use f’c = 21 MPa and fy = 415 MPa. a. Determine the nominal compressive force on concrete only when the column is at balanced condition with bending about the strong axis. = [Cc] kN (whole number, ANS: 888) b. Determine the location of the plastic centroid from the left short side of the column. = [x] mm (ANS 200) c. Determine the ultimate axial load the column can sustain at balanced condition if the reduction factor is 0.65. = [Pub] kN (whole number, ANS 552).
- A short rectangular column 300 mm on one side and 400 mm on the other side. It is reinforced with 8-20-mm-diameter longitudinal bars equally distributed to the shorter sides of the column. The centroid of the bars are 70 mm from the concrete surface. Use f’c = 21 MPa and fy = 415 MPa. 4. Determine the nominal compressive force on concrete only when the column is at balanced condition with bending about the strong axis. = [Cc] kN (whole number) Answer: 888A cast iron 3m long is completely filled with concrete and used as a vertical strut. If the externaldiameter of the tube is 450mm and the wall is 35mm thick, determine the maximum compressiveload the composite strut can support if the stress in the concrete is not 2N/mm2? By how muchshould the strut shorten under this load? For cast iron EA= 100GN/m2 and for the concrete EB=10GN/m2?The column is constructed from high-strength concrete and eight A992 steel reinforcing rods. The column is subjected to an axial force of P=210 kip. Each rod has a diameter of 1 in.in. For A992 steel, Est=29.0(103)ksi, and for high-strength concrete, Ec=4.20(103)ksi. Determine the average normal stress in the concrete and in each rod. (Please type answer no write by hend)