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Design of concrete strc course
6" 20" 26" fc = 4,000 psi Y150 lb/ft 4#8 3"...
1. For the cross section and loading shown below. [50 points] 10" fc-5500 psi 60,000 psi...
1. For the cross section and loading shown below. [50 points] 10" fc-5500 psi 60,000 psi Concrete unit weight 150 pcf 18.5, P,-15 kips w 1,500 lb/ft 32" 25" 37 (12) #8 15" a. Calculate the gross moment of inertia, Ig, and the location of the centroid, ybar (from the bottom) Neglect the steel when calculating Ig. [10 points] b. What is the cracking moment, Mcr? [5 points] c. Calculate the cracked transformed moment of inertia, Icr. [10 points] d....
Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi,...
Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load we = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section, including reinforcing...
Design (give the cross section) for a 10 ft. long simply supported plain (unreinforced) concrete beam...
Design (give the cross section) for a 10 ft. long simply supported plain (unreinforced) concrete beam that is capable of supporting its own self weight plus a 270 lb Razorback football player at midspan without cracking (stress at bottom less than modulus of rupture). Use a unit weight of concrete of 145 pcf, try to minimize the concrete area (optimized design). Be careful of units. f’c = 4,000 psi.
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level...
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level moment M= 200 ft-k, use the procedures from Chapter 2 to find (20 pts) the following using linear-elastic analysis procedures and using transformed section a. properties: compressive stress in the concrete (fc) tension stress in the bottom steel (fs) compressive stress in the top steel (f's) What is the applicable moment of inertia of the concrete section if the (10 pts) service level moment...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc =...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load wų = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc'/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section,...
pls show work 2. Find the effective moment of inertia for the following concrete sections (f....
pls show work
2. Find the effective moment of inertia for the following concrete sections (f. = 4000 psi) when cracked moment to applied moment ratio is (a) 0.9 (b) 0.7 and (c) 0.5. Note: values are not from an actual beam. Calculate the applied moment if the beam span is 8 ft and (a) the central point load is 8 kip and (b) a UDL of 1 kip/ft is applied. Calculate the deflection due to a point load of...
In the following reinforced concrete beam, bending moment is 150kip-ft and Ec = 3.75x10^6psi Es =...
In the following reinforced concrete beam, bending moment is
150kip-ft and Ec = 3.75x10^6psi Es = 30x10^6psi determine (a) the
stress in the steel (b) the madimum stress in the concrete
This is what I've done so far. I think the next step is to
calculate the distance of neutral axis from the bottom section
which should end up in a quadratic equation to solve for x.
Q4) In the following reinforced concrete beam, bending moment is 150kip-ft and E=3.75x10°Es=30x10ʻpsi...
Design interior one-way slab for the situation shown. Concrete weight = 150 lb/ft^3 f_y= 60,000 psi,...
Design interior one-way slab for the situation shown. Concrete
weight = 150 lb/ft^3
f_y= 60,000 psi, f_c= 4,000 psi.
Do not use the ACI Code’s minimum thickness for deflections.
Assume: h= 7.5 in, b= 12 in,
d= h-0.75-(0.25)
steel percentages are given on the figures.
The only dead load is the weight of the slab
WL150 psf im -24 ft
WL150 psf im -24 ft
12 in 4 in 18 10 ft 10 ft 10ft 10ft Problem #3 Determine the required...
12 in 4 in 18 10 ft 10 ft 10ft 10ft Problem #3 Determine the required area of steel for a rectangular beam sections with b-10 in andh - 22 in to resist a factored design moment, Mu 260 kip-ft. If compression steel is needed, assume it is placed at a concrete cover of 2.5 in. use fc 4000 psi and fy- 60 ksi. Note: Provide a detailed sketch for the final section with strain and force diagrams
COURSE CE 3202 - Design of Concrete Structures SUBJECT HOMEWORK 4 DATE LECTURE # HW 4-2...
COURSE CE 3202 - Design of Concrete Structures SUBJECT HOMEWORK 4 DATE LECTURE # HW 4-2 A simply supported beam with the cross section shown in Fig. P9-5 has a span of 25 ft and supports an unfactored dead load of 1.5 kips/ft, including its own self-weight plus an unfactored live load of 1.5 kips/ft. The concrete strength is 4500 psi. Compute (a) the immediate dead load deflection. (b) the immediate dead-plus-live-load deflection. 16 No. 8 bars Fig. P9-5
1. For the cross section and loading shown below. [50 points] 10" fc-5500 psi 60,000 psi Concrete unit weight 150 pcf 18.5, P,-15 kips w 1,500 lb/ft 32" 25" 37 (12) #8 15" a. Calculate the gross moment of inertia, Ig, and the location of the centroid, ybar (from the bottom) Neglect the steel when calculating Ig. [10 points] b. What is the cracking moment, Mcr? [5 points] c. Calculate the cracked transformed moment of inertia, Icr. [10 points] d....
Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load we = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section, including reinforcing...
2.5" 2#7 fc= 4,000 psi fy= 60,000 psi n 8 5#11 3" 18" For service level moment M= 200 ft-k, use the procedures from Chapter 2 to find (20 pts) the following using linear-elastic analysis procedures and using transformed section a. properties: compressive stress in the concrete (fc) tension stress in the bottom steel (fs) compressive stress in the top steel (f's) What is the applicable moment of inertia of the concrete section if the (10 pts) service level moment...
Problem 3 Assume normal concrete weight (wc = 143 lb/ft) with specified compressive strength fc = 4,000 psi, and steel Grade 60 (fy = 60,000 psi). For design loads assume dead load wd = 30 lb/ft? (excluding self-weight) and live load wų = 100 lb/ft. Finally assume that the steel percentage ratio is equal to p= 0.18fc'/fy. Design an interior one-way simply supported slab with a 15 ft span using the above assumptions. Show sketches of one-way slab cross section,...
pls show work
2. Find the effective moment of inertia for the following concrete sections (f. = 4000 psi) when cracked moment to applied moment ratio is (a) 0.9 (b) 0.7 and (c) 0.5. Note: values are not from an actual beam. Calculate the applied moment if the beam span is 8 ft and (a) the central point load is 8 kip and (b) a UDL of 1 kip/ft is applied. Calculate the deflection due to a point load of...
In the following reinforced concrete beam, bending moment is
150kip-ft and Ec = 3.75x10^6psi Es = 30x10^6psi determine (a) the
stress in the steel (b) the madimum stress in the concrete
This is what I've done so far. I think the next step is to
calculate the distance of neutral axis from the bottom section
which should end up in a quadratic equation to solve for x.
Q4) In the following reinforced concrete beam, bending moment is 150kip-ft and E=3.75x10°Es=30x10ʻpsi...
Design interior one-way slab for the situation shown. Concrete
weight = 150 lb/ft^3
f_y= 60,000 psi, f_c= 4,000 psi.
Do not use the ACI Code’s minimum thickness for deflections.
Assume: h= 7.5 in, b= 12 in,
d= h-0.75-(0.25)
steel percentages are given on the figures.
The only dead load is the weight of the slab
WL150 psf im -24 ft
WL150 psf im -24 ft
12 in 4 in 18 10 ft 10 ft 10ft 10ft Problem #3 Determine the required area of steel for a rectangular beam sections with b-10 in andh - 22 in to resist a factored design moment, Mu 260 kip-ft. If compression steel is needed, assume it is placed at a concrete cover of 2.5 in. use fc 4000 psi and fy- 60 ksi. Note: Provide a detailed sketch for the final section with strain and force diagrams
COURSE CE 3202 - Design of Concrete Structures SUBJECT HOMEWORK 4 DATE LECTURE # HW 4-2 A simply supported beam with the cross section shown in Fig. P9-5 has a span of 25 ft and supports an unfactored dead load of 1.5 kips/ft, including its own self-weight plus an unfactored live load of 1.5 kips/ft. The concrete strength is 4500 psi. Compute (a) the immediate dead load deflection. (b) the immediate dead-plus-live-load deflection. 16 No. 8 bars Fig. P9-5
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