5. A reinforce concrete beam having a width of 310 mm and an overall depth of 550 mm is reinforced with 2-25 mm compression bars and 8-25 mm tension bars, both having fy= 415 MPa. Concrete protective covering is 50 mm from the centroid of the bar group. Unit weight of concrete is 23.5 kN/m3. Concrete strength fc= 21 MPa. The beam is supported as shown in the figure. L1= 8m, L2= 3 m. Other the weight of the beam, will support a uniform live load. Use 2015 NSCP a. Determine the balance tension steel area. b. Determine the ultimate moment capacity of the beam. c. Determine the maximum uniform service live load that the beam can carry. Answer: a) Asb = 4,332 mm²; b) OMn = 468 kN – m c) WL= 46.5 kN/m

5. A reinforce concrete beam having a width of 310 mm and an overall depth of 550 mm is reinforced with 2-25 mm compression bars and 8-25 mm tension bars, both having fy= 415 MPa. Concrete protective covering is 50 mm from the centroid of the bar group. Unit weight of concrete is 23.5 kN/m3. Concrete strength fc= 21 MPa. The beam is supported as shown in the figure. L1= 8m, L2= 3 m. Other the weight of the beam, will support a uniform live load. Use 2015 NSCP a. Determine the balance tension steel area. b. Determine the ultimate moment capacity of the beam. c. Determine the maximum uniform service live load that the beam can carry. Answer: a) Asb = 4,332 mm²; b) OMn = 468 kN – m c) WL= 46.5 kN/m

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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A rectangular reinforced concrete beam has a length of 14 m is simply supported atboth ends. The width of beam is 350mm and the overall depth is 550 mm. Determine the area of the steel reinforcements if the beam is to carry a DL = 15kN/m and LL =18kN/m. The concrete strength fc = 25 and steel yield fy = 400 ��. Use 60 mm concretecover.