2. Design of reinforcing for singly-reinforced concrete beams. Design a rectangularreinforced concrete beam to resist a total design moment, Mu of 140k-ft (This includesthe moment due to self-weight of beam). Architectural considerations require that thewidth (b) be 12in. and the overall depth(h) be 18in. and clear cover is 1.5in. Usef'c=3000psi and fy=60,000 psi. Sketch your design.

Answered: 2. Design of reinforcing for…

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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REINFORCED CONCRETE SUBJECT
The 5-story building design project will have its beams and slab poured monolithically and formed a T- section as shown. Determine the design strength oMn in accordance with the ACI/NSCP Code. The tension steel is 9- 36 mm diameter bars (As of 36 mm = 1006 mm2) with three bars in each of three layers. Assume 12 mm stirrups are used, and there is 25 mm between layers. Use fc' = 28 MPa and fy = 413.70 MPa. 750 mm T175 mm 1000 mm 9-36 mm dibmeter bars 350 mm dooo
A rectangular bear has a wish of 300mm and a total depth of 650mm , calculate the area of steel reinforcement repral Take, M. 360kN.m f30 MPa and , 400MP
1. A rectangular beam section is 10 in. wide and has a structural depth of 13.5 in. Reinforcement consists of two No. 8 bars. Given that the strength normalweight concrete is 4000 psi and there is NO shear reinforcement in the section, determine the nominal shear capacity allowed by the ACI Code. (5 pt) (Hint: No web reinforcement, so Vc = 8λ¸λ(pw)¹/³¸ √ Fcbw d cbwd shall be used).
III. A simply-supported rectangular concrete beam with a width of 300mm wide, 600 mm total depth, and 5.8 m long, is needed to accommodate both ceiling height clearance below and the superimposed loads. If f' = 28 Mpa and steel 415 Mpa, fy = 13) what is the allowable resisting moment of the beam without 300 mm stressing the concrete beyond 0.45f"c and steel 0.60f,? Use the transformed area method and rn 8 65 mm 2 #25mm 535 mm 600 mm 14) what is the allowable resisting moment of the beam using the strength design method. 4 #32 mm 65 mm 15) Compare the results of (a) and (b) and comment your observation.
Principle of Reinforced/ Pre-stressed Concrete Please provide clear solution. Thank you!
Q2// A floor system consists ofconcrete slab supported by continuous beam h = 140mm , bw = 300mm,d = 550mm, f 28MPA, fy = with: %3D 420MPа. Determine the steel reinforcement required at mid span of interior beam to resist service dead load moment Ma = 320KN.m and service live load moment M = 250 kN.m %3! %3D 8m + 3m 4 3m 3m 1-1
Practice Problem 4.5 A rectangular beam has a width of 320 mm and an effective depth of 570 mm. Concrete cover is 60 mm from the centroid of bars. Concrete compressive strength, f'c= 24 MPa. Steel yield strengths are 415 MPa for longitudinal bars and 275 MPa for hoops. Stimups are placed in 2 layers with a diameter of 10 mm. Detemine the required spacing of the stimups when a) The required strength Vu is 50 kN b) The required strength Vu is 90 kN c) The required strength Vu is 130 kN d) The required strength Vu is 290 kN e) The required strength Vu is 360 kN f) The required strength Vu is 570 kN
A precast T beam is to be used as a bridge over a small roadway. Concrete dimensions are be = 48 in., bw= 16 in., hf = 5 in., and h = 25 in. The effective depth d = 20 in. Concrete and steel strengths are 6000 psiand 60,000 psi, respectively. Using approximately one-half the maximum tensile reinforcement permittedby the ACI Code (rmax = 0.0273), determine the design moment capacity of the girder. If the beam is usedon a 30 ft simple span, and if in addition to its own weight it must support railings, curbs, and suspendedloads totaling 0.475 kip/ft, what uniform service live load limit should be posted?
Wood planks are used on each working level. The deck width/bearer span is 5 ft.. The bearers and posts are standard pipe and the pipe material is A36 steel with a yield stress of 36,000 psi and modulus of elasticity of 29,000,000 psi. Bearers are to be located at a vertical spacing of 10 ft (largest, lowest post height). Posts are to be 7 ft oc (plank length) parallel to the building wall and 5 ft apart (bearer length) perpendicular to the building wall. There are four working levels and the anticipated scaffold loading will be med duty. A. Assuming the ultimate bending strength of the planks is 3,800 psi (apply a 4:1 F.O.S.), determine the required minimum plank thickness to the nearest 100th. B. Based on the bearer material provided, what is the minimum pipe size that can be safely used? See Appendix 2 in your textbook for steel pipe properties. C. Based on the post material provided, can a 2” standard pipe be used safely? Be sure it satisfies buckling stress conditions only.
3) Calculate the nominal moment strength and the design ultimate moment of the precast T-beam shown in Figure if the beam span is 30 ft. Given: f=4000 psi, normal-weight concrete fy=60,000 psi Reinforcement area at the tension side: 2 in. 40 in. 4 No. 9 bars 10 in. 2.5 in. 20 in.
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