Situation no. 1: Calculate the bending stresses in the concrete and the reinforcing steel, using the transformed area method: fc= 3000 psi, normal- weight concrete, n= 9, M = 250 ft-k. %3D -bym 60 in. - 1. Bending stress of concrete. a 0.057psi My = 5 in. b. 57ksi C. 6840 ksi d= 28 in. A,6 hars d. 684psi e. 2. Bending stress of steel. a. 24.4ksi b. 2.03 ksi C. 24354.00ksi b12 in. d. 2.71ksi e.

Situation no. 1: Calculate the bending stresses in the concrete and the reinforcing steel, using the transformed area method: fc= 3000 psi, normal- weight concrete, n= 9, M = 250 ft-k. %3D -bym 60 in. - 1. Bending stress of concrete. a 0.057psi My = 5 in. b. 57ksi C. 6840 ksi d= 28 in. A,6 hars d. 684psi e. 2. Bending stress of steel. a. 24.4ksi b. 2.03 ksi C. 24354.00ksi b12 in. d. 2.71ksi e.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Assuming concrete is uncracked. Compute the bending stress in the extreme fiber of the beam of figure for bending moment 1x10°kg cm . Determine the cracking moment of the section. A = 10cm² %3D E, = 2*10°kg / cm² E = 2*10°kg / cm² %3D %3D f'. =1836kg / cm² %3D 90 cm 100 cm 40 cm
The cross section of a beam is shown in the figure is reinforced with 5-28 mm diameter bars placed at 100 mm from the bottom fiber. The beam is expected to carry a service moment of 280 kN-m. Use f'c=28 MPA and fy=280 MPa. All dimensions are in millimeters. Using WSD method, calculate the following: 1. Cracking moment of the section. 2 Compressive stress on the concrete., 3. Tensile stress on the steel. 4. Compressive force on the concrete. 300 I00 300 300 300 100 mm 100 -1700 mm
SIT. B: Determine the tensile steel ratio of a given conditions if concrete strength f'. = 28 MPa and steel yield strength fy 4. if the tensile strain is Es = fy/Es upon crushing of concrete at a strain of 0.003. C. 0.02833 A. 0.01567 B. 0.02161 D. 0.02125 if the tensile strain is limited to 0.004 upon crushing of concrete at a strain of 0.003. A. 0.01567 B. 0.01548 5. 6. Minimum as required by NSCP 2015. C. 0.00313 D. 0.00405 A. 0.00333 B. 0.00276 = 420 MPa. C. 0.02778 D. 0.02064 uniformly
Assuming the concrete is uncracked, compute the flexure stresses in the extreme fibers of the beam as shown in the figure for a bending moment of 34 kN-m. The concrete has an f' of 27.60 MPa; determine also the cracking moment of the section. (Use 0.62 1 = 0.70 in calculating the modulus of rupture). Dimensions are in millimeter. 380 455 3 #9 bars (A, = 3.00 in.2) 75 300
Determine the prestressing steel area required for the precast concrete T-beam. Use the following data: Total moment = 250 kN-m Effective stress fse= 862 MPa Allowable concrete stress = f.=11 MPa Consider zero stress at the bottom of the beam I=3673x106 mm4 A=103125 mm² Eccentricity = 271.6 mm Centroid of steel is located at 100 mm from the bottom of the beam. Select one: a. 591.97 mm b. 789.29 mm 2. C. 443.98 mm 2. d. 986.61 mm
Problem 1: Transformed Moment of Inertia and Elastic Deflection Given: The center of the top and bottom rebars are placed 2.5" from the top and bottom faces. Top Reinforcement: 2 no. 4 Rebar Bottom Reinforcement: 4 no. 9 Rebar Use textbook table A-1 for rebar properties Es = 29,000 ksi Ec = 3,600 ksi Unit weight of plain concrete = 145 lb/ft³ a. Find the transformed moment of inertia of the composite section. b. Calculate the reinforcement ratio p where p is Asb/bd. Asb is the area of the bottom steel, d is the depth from the top face of the beam to the bottom steel, and b is width of the beam. 16" c. A 30' simply supported beam has this cross-section. Ignoring the effects of cracking, how much would the beam deflect under its own self-weight and a live load of 0.64 kip/ft? d. Often the unit weight for reinforced concrete is assumed to be 150 lb/ft³. Repeat part c. using this assumption. e. Repeat part c. using the gross moment of inertia. Note: the gross moment of inertia is the…
Problem 2: If f = 3 ksi what is the modulus of elasticity Ec and the maximum tensile stress fr that the concrete can carry before cracking (use ACI recommended equations). Assume a unit weight of the plain concrete is: a. Wc = 90- b. w lb lb 118- ft39 ft3) C. W = 160- Problem 3: Wight 3-6 Rugblom 4: Wight ? 7 lb ft3
* The Dn value for a low relaxation steel is ______. * Determine the elastic shortening loss of a pretensioned concrete, in percentage (simply supported L=15m, H=900mm, B=300mm) given that, fpi=1100MPa, f'ci=40MPa, Eps=200GPa, and the total area of the straight profile tendons is 140 sq.mm.
Assuming concrete is uncracked. Compute the bending stress in the extreme fiber of the beam of figure for bending moment 1x10°kg cm . Determine the cracking moment of the section. =10cm? E, = 2*10°kg /cm? E = 2*10 kg /cm f'. =1836kg / cm? 90 cm 100 cm 40 cm
In all Questions use the Working Stress Method and the flowing material 25 MPa and f, = 420 MPa. properties f = If the stress in the top fiber of the concrete is f = 12.5MPa and in the steel is 400 MPa. Ec 25000 MPa, Es 200000 MPa. Determine the following: 1-Maximum strain in concrete 2- Maximum strain in steel and 3- Flexural strength of the section (the moment M) P 500 mm 300 mm
PROBLEM TO SOLVE: 600 mm 400 mm Using fe' = 28 MPa, Mmax = +320 kNm Determine the following: a. Cracking Moment (kNm) 6-25mm diam. b. Compressive Stress felt by concrete (MPa) c. Tension Stress felt by the tension bars (MPa)
A Normal-weight concrete T beam shown in the figure below is reinforced at the tension side by 3 - #25 bars. The concrete is assumingly uncracked and has a compressive strength of fe' = 29 MPa, fy=370 MPa, and the clear concrete cover is 40 mm, the modular ratio is n=9, and the web rein. is #10 mm. Determine the cracking moment (kN m) of the section using solution 2. 1300 125 250 500