Concept explainers
Repeat Problem 20-12, with the slab containing temperature steel in the form of welded wire mesh consisting of 0.125 in.2 steel/ft width. The modulus of steel, Es, is
Trending nowThis is a popular solution!
Chapter 20 Solutions
MindTap Engineering for Garber/Hoel's Traffic and Highway Engineering, 5th Edition, [Instant Access], 1 term (6 months)
- CASE:A rectangular beam has the dimensions (see Fig.1) b = 15 in.,h = 30 in., and d = 27.37 in. and is reinforced with three No.9 bars. The concrete compressive strength fc' is 4000 psi, and the tensile strength in bending (modulus of rupture) is 475 psi. The yield point of the steel fy is 60,000 psi, the stress-strain curves of the materials being those of Fig.2. Determine the stresses caused by a bending moment M = 45 ft-kips.Question1:Check this case, would the concrete of the beam crack? Please calculate the strengths of those two materials in this beam.Question2:Suppose the beam under this case is subject to a bending moment M = 110 ft-kips (rather than45ft-kips as previously). Calculate the relevant properties and stresses.Question3:Determine the nominal moment Mn at which the beam of this case will fail. Question4:Have a comparison of the calculation results with those of three questions.arrow_forwardArectangular concrete hollow section simply supported beam shown below have the following dimensions: b= 10-inch, w = 2 inches and h = 18 inches and spans 14 ft. The section should carry its own weight and imposed a dead load of 150 Ib/ft and a live load of 50 lb/ft. If the young's modulus is 10.2 x 10° psi and the density of concrete is 150 Ib/ft³, calculate the: 1. Permissible bending stress if the concrete strain is 0.003 2. The moment resistance of the beam 3. The maximum bending moment b warrow_forwardJm The two-way slab has been assumed to have a thickness of 150 mm. Check the NSCP 2015 equations to determine if the slab thickness is satisfactory for an interior panel. Use fc = 28 MPa, fy = 415 MPa and normal weight. What is the value of a 5.0m Express your answer in two decimal places. 4.0m 4.0m 4.0ml L all columns 300mmx300mm 1000mm 300mm Section A-A -5.0m 150mm + 350mm -5.0marrow_forward
- Bonusarrow_forwardA 6m-simply supported beam cross-section is shown in the figure below is prestressd with 15 wires of 5mm diameter at the bottom and 3 wires at the top. Assuming prestress in steel is 840 Mpa and the density of concrete is 24 kN/m3. Calculate the stress at bottom extreme fiber at midspan. (Mpa)arrow_forwardA reinforced concrete beam has a width of 400 mmand a total depth of 550 mm. The longitudinal bars at the top are 2– 28 mm and 4 – 32 mm at the bottom. Concrete strength is f’c =24 MPa and steel yield strength fy = 300 MPa. Steel cover is 70mm and modular ratio is 9.What is the transformed moment of inertia?What is the moment capacity?What is the safest uniformly distributed load that the beam cancarry if the length of the simply supported beam is 8 m.arrow_forward
- Question.barrow_forwardThe three parts of this problem refer to the floor plan shown in figure. Assume that the entire floor system is constructed sand normal weight concrete that has a compressive strength, fc= 4000psi. Also assume that the longitudinal steel has a yield strength, fy=40 ksi, and that the transverse steel has a yield strength of fyt= 40ksi. The slab thickness is 6", with a superimposed dead load of 18 psf and live load of 26 psf. a). Design the spandrel beam between columns B1 and C1 for bending, shear, and torsion. Check that all of the appropriate ACICode requirements for strength, minimum-reinforcement area, and reinforcement spacing are satisfied. b). Design the spandrel beam between columns A1 and A2 for bending, shear, and torsion. Check that all of the appropriate ACI Code requirements for strength, minimum-reinforcement area, and reinforcement spacing are satisfied. c). Design the spandrel beam between columns B2 and C2 for bending, shear, and development length and splicing. Check…arrow_forward1. Determine the area of reinforcing steel required for the T beam shown if concrete compressive strength is 28 MPa and steel yield strength = 420 MPa and modulus of elasticity of steel = 200,000 MPa. Check tensile strain to see that it is 0.005 effective width= 1600 mm 300 mm M₂=475 kN m 100 mm 600 mm 500 mmarrow_forward
- Hello, please solve the question about reinforced concrete from the sixth and seventh chapters of the third civil stagearrow_forwardDetermine the design moment strength of a hollow reinforced concrete section shown in Fig (2). f'c =28 mPa and fy= 420 mPa and check the specification of the section according to ACI Code. 100 100 100 Fig. (2). (All dimensions in mm) 700 mm 3632 300 mm 100 150 65arrow_forwardA reinforced concreté column contains longitudinal steel equal to 1% of net cross-sectional area of the column. Assume modular ratio as 10. The loads carried (using the elastic theory) by the longitudinal steel and the net area of concrete are P and P, respectively. The ratio PJP, expressed as per cent isarrow_forward
- Structural Analysis (10th Edition)Civil EngineeringISBN:9780134610672Author:Russell C. HibbelerPublisher:PEARSONPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
- Fundamentals of Structural AnalysisCivil EngineeringISBN:9780073398006Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel LanningPublisher:McGraw-Hill EducationTraffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning