Steel Design (Activate Learning with these NEW titles from Engineering!)
6th Edition
ISBN: 9781337094740
Author: Segui, William T.
Publisher: Cengage Learning
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Chapter 9, Problem 9.1.6P
To determine
The nominal flexural strength of the composite beam given in problem 9.1-3.
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Compute for the moments of inertia of the composite figure with respect to the following:
a. x2
b. y1
c. centroidal axis
Solve for the centroid of the given composite structural section and determine the moments of area about the x-axisand y-axis.
show fbd and complete solutions
Q2 For the composite beam shown, find the moment of resistance of the beam when the maximum bending stress in the timber s (14 MPa). For steel (E = 200 GPa) and for wood (E = 10Gpa) 2 A 7 7 r*
Chapter 9 Solutions
Steel Design (Activate Learning with these NEW titles from Engineering!)
Ch. 9 - Prob. 9.1.1PCh. 9 - Prob. 9.1.2PCh. 9 - Prob. 9.1.3PCh. 9 - Prob. 9.1.4PCh. 9 - Prob. 9.1.5PCh. 9 - Prob. 9.1.6PCh. 9 - A W1422 acts compositely with a 4-inch-thick floor...Ch. 9 - Prob. 9.2.2PCh. 9 - Prob. 9.3.1PCh. 9 - Prob. 9.3.2P
Ch. 9 - Prob. 9.4.1PCh. 9 - Prob. 9.4.2PCh. 9 - Prob. 9.4.3PCh. 9 - Prob. 9.4.4PCh. 9 - Prob. 9.4.5PCh. 9 - Prob. 9.5.1PCh. 9 - Prob. 9.5.2PCh. 9 - Prob. 9.5.3PCh. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Note For Problems 9.6-1 through 9.6-5, use the...Ch. 9 - Prob. 9.7.1PCh. 9 - Prob. 9.7.2PCh. 9 - Prob. 9.7.3PCh. 9 - Prob. 9.7.4PCh. 9 - Prob. 9.8.1PCh. 9 - Prob. 9.8.2PCh. 9 - A beam must be designed to the following...Ch. 9 - Prob. 9.8.4PCh. 9 - Prob. 9.8.5PCh. 9 - Prob. 9.8.6PCh. 9 - Prob. 9.8.7PCh. 9 - Prob. 9.8.8PCh. 9 - Use the composite beam tables and select a W-shape...Ch. 9 - Prob. 9.8.10PCh. 9 - Prob. 9.10.1PCh. 9 - Prob. 9.10.2P
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- Solve for the centroid of the given composite structural section and determine the moments of area about the x-axisand y-axis.arrow_forwardThe T-beam shown in figure resulted from monolithic construction of the beam and slab. The effective flange width is 1100 mm and the uniform slab thickness is 120mm. Width of beam is 340 mm, total depth of the T-section is 590 mm. The centroid of steel is 70 mm from extreme concrete fiber. Concrete strength f’c= 21 MPa amd steel strength fy= 415 MPa. 1 Calculate the nominal strength of the beam for positive moment neglecting the contribution of the top reinforcement, KN-m A 428.55 B 503.20 C 355.96 D 637.52 2 Calculate the nominal strength of the beam for negative moment, KN-m A 289.88 B 275.53 C 311.67 D 325.48arrow_forwardA composite floor system consists of steel beams supporting a formed steel deck and concrete slab. The deck is shown in Figure P, and the total depth from bottom of deck to top of slab is 61⁄2 inches. Lightweight concrete is used (unit weight =115 pcf), and the 28-day compressive strength is 4 ksi. The deck and slab combination weighs 53 psf. The beams are spaced at 12 feet, and the span length is 40 feet. There is a 20psf construction load, a partition load of 20 psf, other dead load of 10 psf, and a live load of 160 psf. The maximum permissible live-load deflection is Ly/360. Use the composite beam tables and select a W-shape with Fy= 50 ksi. Design the stud anchors. Use partial composite action and a lowerbound moment of inertia. a. Use LRFD. b. Use ASDarrow_forward
- For the singly reinforced beam, calculate the design strength under the following conditions: b = 250 mm; d = 400 mm; fc’ = 21 MPa; fy = 420 MPa ; As is 5- 20 mm diameter bars.arrow_forwardA concrete floor slab 100 mm thick is cast monolithic with concrete beams 2.0 m on centers. The beams have a span of 4.2 m, web width of 250 mm and overall depth of 450 mm. The tensile reinforcement consists of 4-∅25 mm bars in two rows with 25 mm vertical clear spacing. Use material strengths f’c = 21 MPa and fy = 415 MPa. Tensile steel strain compatible with concrete strain of 0.003 in 3 decimal places.arrow_forwardShow the complete FBD and complete solution. Given that centroid of the plane regions is at c find the radius R. use the method of composite areasarrow_forward
- Estimate the transverse tensile strength of the concrete in Problem 12.6.arrow_forwardThe composite bar is firmly attached to unyielding supports. Compute the stress in each material caused by the application of axial load P=50kips.arrow_forward3) A concrete floor slab 100 mm thick is cast monolithic with concrete beams 2.0 m on centers. The beams have a span of 4.2 m, web width of 250 mm and overall depth of 450 mm. The tensile reinforcement consists of 4-∅25 mm bars in two rows with 25 mm vertical clear spacing. Use material strengths f’c = 21 MPa and fy = 415 MPa. Calculate the following considering a T-geometry: Effective flange width of an interior beam in mm = ___________ Depth of uniform stress block at ultimate stage in mm to the nearest whole number = ___________ Tensile steel strain compatible with concrete strain of 0.003 in 3 decimal places = __________arrow_forward
- A W18 x 40 floor beam supports a 4-inch-thick reinforced concrete slab with an effective width b of 81 inches. Sufficient anchors are provided to make the beam fully composite. The 28-day compressive strength of the concrete is f,c = 4 ksi. a. Compute the moment of inertia of the transformed section. b. For a positive service load moment of 290 ft-kips, compute the stress at the top of the steel (indicate whether tension or compression), the stress at the bottom of the steel, and the stress at the top of the concrete.arrow_forwardA beam is reinforced for tension only unless its required steel ratio is _________ the maximum steel ratio required by NSCP 2015. Select one: a. greater b. smaller If the strain in the compression bar is less than that of the yield strain, is the value of fy equal to fs'? Select one: a. no b. yesarrow_forwardA beam, which is rectangular, has a base of 250 mm, and d = 575 mm. The beam is singly reinforced, where the recorded strain in the steel is 0.005, and the strain in the concrete is 0.003. fc' = 20.7 MPa, fy = 414.6 MPa. Note: As is not Given b) Determine the value of "As"arrow_forward
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