A column with cross section shown below is reinforced with 10 – 28mmϕbars. Concrete covers to c.g. of bars is 70mm in all edges. The 2 bars indicated has a compressive stress, fs’=100 MPa. Using fc’=35 MPa and Grade 420 bars, determine the stress of the bars in tension.
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2. A rectangular beam, 400 x 600 mm gross dimension, is cast using a concrete strength of fc 30 MPa, reinforced with 5-25 mm diameter steel bar at the effective depth of 500 mm. If is subjected to a moment, M 130 kN-m. Determine the following: Magnitude of the bending moment that cracks the singly-reinforced beam section. (10 pts) b. For the computed cracking moment, determine the maximum compressive stress in the concrete and the stress in the tension steel....
1. A cross section of a RC beam is described in a below figure. Three No. 29 reinforcing bars are located at the bottom of the section. The area of a #29 reinforcing bar is 645 mm2 while the yield strength of the steel bar is 420 MPa. The tensile strength of concrete is 2.7 MPa, and the compressive strength of concrete is 21 MPa. In addition, n= E/Eis selected as 8. (1) Compute the maximum compressive and tensile stresses...
A reinforced concrete beam with dimensions (300 mm * 800 mm) subjected to a service dead load moment (MD= 500 kN.m) and a service live load moment (ML = 400 kN.m). Design the section as a double reinforced section (the dimensions can't be increased). Place the compression reinforcement at 65 mm from the compression face. Compressive strength of concrete; fc = 28 MPa, yielding stress of reinforcement; fy= 420 MPa. Assume 30 mm to be used in the tension (two...
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1) A steel pipe is filled with concrete as ilustrated below. If an axial force of kN is applied to the composite column, compute t in the concrete and in the steel. Assume the pipe has an outsid mm and an inside diameter of 70 mm. ESTEEL 200,000 MPa, EcoNC [oSTEEL 48.8 MPa, ơCONCRETE 5.85 MPa] he normal compressive stress e diameter of 80...
Reinforced concrete
Problem #1 (40 points): A beam with x-section shown in the figure is made out of concrete with compressive strength fc = 4000 psi and the steel reinfrocemnt is of Grade 60 (fy 60000psi). Determine 1 The maximum compressive stress in the concrete f and the tensils stress in the steel , if the section is subjected to a bending moment of 130 ft-k (assume n 8) N.A._ 23" 23-х 4 #10 (5.06 in. 3" 18"
ACI code
Interaction Diagrams and Strain Compatibility for Columns The column cross-section is 300 mm x 500 mm and is not in contact with the ground or exposed to the weather. Ties are #10 bars and longitudinal reinforcement is # 19. Concrete compressive strength is 42 MPa and steel yield strength is 420 MPa. Calculate the axial load carrying capacity, OP and flexural capacity OM, for point in the interaction diagram with bending about the 3-3 axis where the tensile...
A reinforced concrete beam with dimensions (300 mm * 800 mm) subjected to a service dead load moment (MD=500 kN.m) and a service live load moment (ML = 400 kN.m). Design the section as a double reinforced section (the dimensions can't be increased). Place the compression reinforcement at 65 mm from the compression face. Compressive strength of concrete; fe 28 MPa, yielding stress of reinforcement; fy= 420 MPa. Assume 30 mm to be used in the tension (two layers), 26...
Design a reinforced concrete beam that has a rectangular cross section with a width b = 24 in. The depth h is limited by architectural reasons to 16 in. It has to carry a factored moment Mu = 360 kip- ft. including the self-weight. The design should satisfy ACI 318 for tension controlled members. Use Grade 60 steel and a specified concrete compressive strength = 4,000 psi. Determine the flexural reinforcement for the beam, and use compression steel if needed....
Reinforced Concrete Design
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Problem 1: The reinforced concrete cantilever beam shown is subjected to a concentrated load P- 2 kips, at its free end. Determine the development length of the shown bars using the detailed and simplified methods for the following cases: a) straight bars b) 90 hooks c )180, hooks The column width is 22 inches. Concrete cover is measured from the concrete surface to the center of the reinforcement. fc 4...
For the same singly-reinforced (reinforcement in tension only) concrete section used in Homework 3, we want to investigate the impact of using a parabolic semi-segment for the shape of the concrete stress-strain curve in the determination of the ultimate capacity of the beam. Note that steel stress-strain behavior will be modeled using elasto-plastic model. The properties of the materials are s"-4500 psi for the concrete and Jy -60 ksi for the reinforcement. Using this type of behavior leads to the...