ye 12" ut r9" selo" Fig. P6-4 Fig. P6-5
Homework Answers
6a)
Width of web of concrete=5"
Effective depth=19"
Grade if concrete=4000 psi
Shear strength of concrete alone=0.75*2*sqrt(4000)*5*19/1000=9 kips
Grade of steel=60 ksi
Number of legs of #3 stirrups=2
Area of stirrups =2*0.11=0.22 in²
Spacing of stirrups=10"
Design strength of stirrups=0.75*60*0.22*19/10=28.7
Total design shear strength of section=9+28.7=37.7 kips
b)
Width of web=6+6=12 in
Effective depth=19.5 in
Shear strength of concrete=0.75*2*sqrt(4000)*12*19.5/1000=22.2 kips
Area of stirrups=2*0.2=0.4 in²
Spacing=12 in
Desugn strength of stirrups=0.75*60*0.4*19.5/12=29.25 kips
TotsT strength of section=22.2+29.25=51.45 kips
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P6-5. In cach case user-yeopsi and, (of the ) stirrups) 60,000 psi. 6-2, 6-3, 6-4, and 6-5 Compute for the cross s...
TOIMII. (10 points) Compute V. for the sections shown. Use fc' = 4,000 psi and fy=...
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HW 3-1 6-9 The beam shown in Fig. P6-9 supports the unfactored D 1.4 kips/f L...
HW 3-1 6-9 The beam shown in Fig. P6-9 supports the unfactored D 1.4 kips/f L -1.5 kips/ft loads shown. The dead load includes the weight o the beam. (a) Draw shearing-force diagrams for 25 ft factored dead and live load on the entire beam; Fig. P6-9 (b) Design stirrups. Use f 4500 psi and No. 3 40,000 psi. double-leg stirrups with f 36 14* 12-
PLEASE USE Imperial units Compute the design strength of the beam shown if fy 60,000 psi...
PLEASE USE Imperial units
Compute the design strength of the beam shown if fy 60,000 psi and f 5,000 psi 12 in 2#9 3 in 21 in 5#9 6 in 3 in 36 in
Compute the design strength of the beam shown if fy 60,000 psi and f 5,000 psi 12 in 2#9 3 in 21 in 5#9 6 in 3 in 36 in
NOTE Vn(min)= 12.8k Vn(Max)= 81.9k 2) Design the stirrups for the beam using f'4000 psi concrete and # 3 Grade 60 s...
NOTE
Vn(min)= 12.8k
Vn(Max)= 81.9k
2) Design the stirrups for the beam using f'4000 psi concrete and # 3 Grade 60 stirrups. a) Determine if and where no stirrups can be used in the beam. b) Provide 3 "zones" of stirrups: maximum permissible spacing near midspan, tightest spacing near the support and a transition zone 12 in f4000 psi d 16 in 24 ft #3 stirrups Normal weight concrete 3/4 in. max. aggregate 1.5 in. clear cover 2.69 in 3...
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P.6-2 The circuit in Fig. 6-9 is situated in a magnetic field B a,3 cos (5?...
P.6-2 The circuit in Fig. 6-9 is situated in a magnetic field B a,3 cos (5? 1071- ry) (pT). Assuming R -15(Q), find the current i P.6-4 In Fig. 6-10 assume a constant current i, - lo.but that the rectangular loop moves away with a constant velocity u = a,uo. Determine i2 when the loop is at a position as shown. FIGURE 69 A circuit in a time-varying magnetic FIGURE 6-10 A rectangular loop near a long field (Problem P.6-2)...
1) Find minimum depth. Assuming it does not support partitions likely to be damaged. 2) If...
1) Find minimum depth. Assuming it does not support partitions
likely to be damaged.
2) If the beam were to fail in bond, the cracks (relative to the
plane defined by the longitudinal steel) will most likely be:
A. Vertical
B. Horizontal
C. Combination of vertical and horizontal
D. Inclined
E. None of the above
3) Find the spacing of the #3 U stirrups corresponding to a
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Design of concrete strc course 6" 20" 26" fc = 4,000 psi Y150 lb/ft 4#8 3"...
Design of concrete strc course
6" 20" 26" fc = 4,000 psi Y150 lb/ft 4#8 3" The cross-section of an R/C beam is given as shown. The main reinforcements are placed at the bottom. Using the listed data, determine the following: (1) the location of the neutral axis (NA) from bottom: (Ybar) (2) the moment of inertia about the Neutral Axis :(I) (3) the cracking moment: (Mer)
TOIMII. (10 points) Compute V. for the sections shown. Use fc' = 4,000 psi and fy= 50,000 psi. 5 in #3 stirrups 8 in. 27 in. 30 in. #4 stirrups @ 6 in 22 in. 32 in. 3 in 16 in Problem 2. (10 points) For the given beam and load, select stirrup spacings. Assume #4 U-stirrups (fyt = 60,000 psi) and normalweight concrete with fe' = 4,000 psi. Show your shear diagram and the important values. Also, show the...
HW 3-1 6-9 The beam shown in Fig. P6-9 supports the unfactored D 1.4 kips/f L -1.5 kips/ft loads shown. The dead load includes the weight o the beam. (a) Draw shearing-force diagrams for 25 ft factored dead and live load on the entire beam; Fig. P6-9 (b) Design stirrups. Use f 4500 psi and No. 3 40,000 psi. double-leg stirrups with f 36 14* 12-
PLEASE USE Imperial units
Compute the design strength of the beam shown if fy 60,000 psi and f 5,000 psi 12 in 2#9 3 in 21 in 5#9 6 in 3 in 36 in
Compute the design strength of the beam shown if fy 60,000 psi and f 5,000 psi 12 in 2#9 3 in 21 in 5#9 6 in 3 in 36 in
NOTE
Vn(min)= 12.8k
Vn(Max)= 81.9k
2) Design the stirrups for the beam using f'4000 psi concrete and # 3 Grade 60 stirrups. a) Determine if and where no stirrups can be used in the beam. b) Provide 3 "zones" of stirrups: maximum permissible spacing near midspan, tightest spacing near the support and a transition zone 12 in f4000 psi d 16 in 24 ft #3 stirrups Normal weight concrete 3/4 in. max. aggregate 1.5 in. clear cover 2.69 in 3...
5.7. Compute the siresses in the compression sieel. f for the crosS sections shown in Fig.5.38. Also compute the nominal moment strength for the section in pan (b). Given 6000 psi (414 MPa),normal-weight concrete 60.0000 psi (414 MPa) .5 in 63.5 mmn 2.5 in (63.5 mm 2 No. 8 2 No, 5 3 No. 9 4 No. 9 10 in. in, (254.0 mm) 163,5 mm 12 in, 304.8 mm (al lb) Figure 5.38 We were unable to transcribe this image
4. For the beam shown below,fe' = 4000 psi and fy = 60,000 psi. (20 points) (a) Compute the effective flange width at midspan. 911-6 in (a) Beam section and distance to adjacent beams Support (negative bending) Midspan positive bending) 7 No. 7 bars IIT 3 No. 8 plus 2 No. 7 bars at midspan 22 2 No. 8 bars at ends (b) Beam span supported by 18-in. wide columns (b) Compute Mn for the positive and negative-moment regions and...
P.6-2 The circuit in Fig. 6-9 is situated in a magnetic field B a,3 cos (5? 1071- ry) (pT). Assuming R -15(Q), find the current i P.6-4 In Fig. 6-10 assume a constant current i, - lo.but that the rectangular loop moves away with a constant velocity u = a,uo. Determine i2 when the loop is at a position as shown. FIGURE 69 A circuit in a time-varying magnetic FIGURE 6-10 A rectangular loop near a long field (Problem P.6-2)...
1) Find minimum depth. Assuming it does not support partitions
likely to be damaged.
2) If the beam were to fail in bond, the cracks (relative to the
plane defined by the longitudinal steel) will most likely be:
A. Vertical
B. Horizontal
C. Combination of vertical and horizontal
D. Inclined
E. None of the above
3) Find the spacing of the #3 U stirrups corresponding to a
design shear of 100 k
A 12 ft cantilever beam 21 in. wide...
6. Compute the orders of the permutations (2 1 4 6 3), (1 2)(3 4 5) and (1 2)(34). 7. Compute the orders of the following products of non-disjoint cycles: (1 2 3)(2 3 4);(1 2 3)(3 2 4);(1 2 3)(3 4 5). Show your work Ans 6. The orders are 5, 6 and 2 respectively. 7. The orders are 2, 3 and 5.
Design of concrete strc course
6" 20" 26" fc = 4,000 psi Y150 lb/ft 4#8 3" The cross-section of an R/C beam is given as shown. The main reinforcements are placed at the bottom. Using the listed data, determine the following: (1) the location of the neutral axis (NA) from bottom: (Ybar) (2) the moment of inertia about the Neutral Axis :(I) (3) the cracking moment: (Mer)
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