c) A concrete lintel with an effective span of 4.0m supports a 230mmbrick wall as shown in figure 7.3. The load on the lintel are G 100kN andQk = 40kN. Determine suitable dimensions for the lintel if grade 30 concreteis used. The beam breadth b will match the wall thickness so that b = 30mm.Assumed loaddistribution4m. effective spanAFigure 7.3

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Answered: c) A concrete lintel with an effective…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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SITUATION A: The floor system shown has the following applied loads. Super Imposed Dead Load = 2.00 kPa Live Load = 1.90 kPa Slab Thickness = 100.00 mm Weight of Concrete = 24 kN/m3 Self-Weight of the beam = 1.92 kN/m Material Specifications: f’c = 21.00 MPa fy = 345.00 MPa Steel Cover = 50.00 mm What is the maximum positive moment of beam BE, acting on the midspan? in kN-m What is the maximum steel ratio of the section located at the supports? What is the actual steel ratio of the beam section at the supports? What is the ultimate moment capacity of the beam at the supports? in kN-m What is the effective flange width at the midspan? in mm What is the height of the compression block of the section at midspan? in mm What is the ultimate moment capacity of the beam at the midspan? in kN-m What would be the height of the CHB that can be placed on beam BE? Assuming the weight of the blocks is 2.30 kN/m per meter height? in meters
1. The strain profile of the section below with compression reinforcement was calculated with a computer program. All dimensions are to center of the reinforcements. Material properties: (a) (b) (c) Concrete, f'e = 4.0 ksi Steel, fy = 60.0 ksi Is the section tension controlled? What is the strength reduction factor (p)? Check if the forces in the section are in equilibrium. Do not correct them if they are not in equilibrium. What is the nominal moment resistance of the section? (4) #9- #5@4" (5) #11. (5) #11 -24"- SECTION 3" 3" 3" 48" 0.015 0.01 0.005 Strain diagram eps ecu epst 10.035 0.01 @lowest reinforcing steel Strain Profile 0 10 20 30 40 50 60 -0.005
4.3 A simply supported beam is reinforced with 5-ϕ25 mm at the bottom and 2-ϕ20 mm at the top of the beam. Concrete covering to centroid of reinforcement is 70 mm at the top and 64 mm at the bottom of the beam. The beam has a gross depth of 450 mm and gross width of 300 mm. fc’= 28 MPa, fy = 415 MPa. Assume bars laid out in single layer. Calculate the following if the limiting tensile steel strain is 0.004 for a ductile failure: Calculate: Maximum service uniform live load over the entire span in addition to a DL = 20 kN/m (including the weight of the beam) if it has a span of 6 m = _____?____ kN/m (to the nearest whole number)

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c) A concrete lintel with an effective span of 4.0m supports a 230mm brick wall as shown in figure 7.3. The load on the lintel are G 100kN and = 40kN. Determine suitable dimensions for the lintel if grade 30 concrete is used. The beam breadth b will match the wall thickness so that b = 30mm.