Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 2, Problem 2.26QP
To determine
Explain the slipping of atoms and the effect of material deformation.
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For the tower shown in Figure (2), check the
suitability of the proposed piled foundation with
the following infiormation: (minimum safety factor
against failure is (2). (neglect the group action), (V
- 2250 kN, including pile cap weight) and (M
4500 kN.m), the pile group consists of one central
the
distributed
and eight piles
circumference of a (6 m) diameter circle ( 45 )
degrees appart}.
pile
on
=
1 m
8 m diameter cap
20 m
Figure (2)
10 m
M
0.5 m diameter bored pile
-30 kPa.
y= 19 kN/m²
Gs-2,7
Sand
Clay
A group of nine piles, 12 m long and 250 mm in diameter, is to be arrenged in a square form in clay
soil with an average unconfined compressive strength of 60 kN/m². Work out the center to center
spacing of the piles for a group effeciency factor of 1. Neglect bearing at the tip of the piles.
Determine the allowable pile load
capacity of the 40 cm diameter driven
concrete pile shown in the Figure (1).
W.T.
Figure (1)
K=1
6=0.750
3 m
6 m
K = 2
6=0.750
5 m
Loose sand
Y₁ = 16 kN/m², '= 30°
Soft clay
Year = 18 kN/m,
2
C= 15 kN/m²
Dense sand
Ysat = 20 kN/m²,
-40°
Chapter 2 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 2 - Define elastic and plastic behaviors at the micro...Ch. 2 - Prob. 2.2QPCh. 2 - Prob. 2.3QPCh. 2 - Describe the order in which electrons fill the...Ch. 2 - Prob. 2.5QPCh. 2 - Why do atoms maintain specific separations?Ch. 2 - Prob. 2.7QPCh. 2 - Prob. 2.8QPCh. 2 - Prob. 2.9QPCh. 2 - Two hypothetical metals are created with different...
Ch. 2 - Prob. 2.11QPCh. 2 - Prob. 2.12QPCh. 2 - Prob. 2.13QPCh. 2 - Prob. 2.14QPCh. 2 - Prob. 2.15QPCh. 2 - Prob. 2.16QPCh. 2 - Prob. 2.17QPCh. 2 - Determine the density of a hypothetical BCC metal...Ch. 2 - Determine the density of a hypothetical FCC metal...Ch. 2 - Prob. 2.20QPCh. 2 - Prob. 2.21QPCh. 2 - Prob. 2.22QPCh. 2 - Prob. 2.23QPCh. 2 - Prob. 2.24QPCh. 2 - Prob. 2.25QPCh. 2 - Prob. 2.26QPCh. 2 - Prob. 2.27QPCh. 2 - Prob. 2.28QPCh. 2 - Prob. 2.29QPCh. 2 - Prob. 2.30QPCh. 2 - Prob. 2.31QPCh. 2 - Prob. 2.32QPCh. 2 - Prob. 2.33QPCh. 2 - Prob. 2.34QPCh. 2 - Prob. 2.35QPCh. 2 - Prob. 2.36QP
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- = The allowable working load on a prestressed concrete pile 21-m long that has been driven 356 mm (see Table 9.3a). into sand is 502 kN. The pile is octagonal in shape with D Skin resistance carries 350 kN of the allowable load, and point bearing carries the rest. Use E, = 21 x 10° kN/m², E, = 25 x 103 kN/m², p, 0.35, and = 0.62. Determine the settlement of the pile. ==arrow_forwardH.W.5: A beam section is limited to a width of 300 mm, and total depth h=500 mm, and has to resist a factored moment 405 kN.m.Calculate the required reinforcement, given f'c=28 MPa, fy=420 MPa. (As=6425mm, As'=2425 mm Ans)arrow_forwardH.W.1: A rectangular beam has a width of 300 mm, and effective depth d=570 mm to centroid of tension steel bars. Tension steel reinforcement consist of 6628mm in two rows, compression reinforcement of 2022mm. Calculate the design moment strength of the beam, where f'c=28 MPa, fy=420 MPa. (Mu=822 kN.m Ans)arrow_forward
- H.W.4: A beam section is limited to a width of 250 mm, and total depth h=550 mm, and has to resist a factored moment 307 kN.m.Calculate the required reinforcement, given f'c=21 MPa, fy=350 MPa, d'=65mm. (As=5425mm, As'=2022 mm Ans) HW5 A beam section is limited to a width of 300 mm and total denth h-500 mm and has to resistarrow_forwardH.W.3: A rectangular beam has a width of 400 mm, and effective depth d=700 mm to centroid of tension steel bars. Tension steel reinforcement consist of 4036mm in two rows, compression reinforcement of 2622mm. Calculate the design moment strength of the beam, where f'c=21 MPa, fy=420 MPa, d'=65mm. (Mu=927 kN.m Ans)arrow_forwardH.W.4: A beam section is limited to a width of 250 mm, and total depth h=550 mm, and has to resist a factored moment 307 kN.m.Calculate the required reinforcement, given f'c=21 MPa, fy=350 MPa, d'=65mm. (As=5425mm, As'=2422 mm Ans)arrow_forward
- H.W.6: Design the steel reinforcement for flexural for the beam shown in the fig. below. Given f'c=28 MPa, fy=420 MPa. D.L 100 kN/m L.L=200 kN 3 m 3 m 600 mm- A =? 300 mm.arrow_forwardThe tension member shown in the figure below must resist a service dead load of 60 kips and a service live load of 45 kips. Does the member have enough strength? The steel is A588: Fy = 50 ksi, F₁ = 70 ksi; and the bolts are 11/8 inches in diameter. Assume that A = An PL 38 x 72 оо a. Use LRFD. Determine the design strength and the factored load. Make a conclusion about the member. (Express your answers to three significant figures.) +Pn Pu = = kips kips -Select- b. Use ASD. Determine the allowable strength and required strength. Make a conclusion about the member. (Express your answers to three significant figures.) Ft Ae = P₁ = -Select- kips kipsarrow_forwardA single-angle tension member of A36 steel must resist a dead load of 49 kips and a live load of 84 kips. The length of the member is 18 feet, and it will be connected with a single line of 1-inch-diameter bolts, as shown in the figure below. There will be four or more bolts in this line. For the steel Fy = 36 ksi and F₁ = 58 ksi. Try the tension members given in the table below. Tension member 4, (in.) rz (in.) 7 L6 × 6 × 9.75 1.17 8 L 5 × 3 × 4.93 0.746 L 5 × 3 × 5 2.56 0.758 16 7 L5 × 3 × 3.31 0.644 16 Bolt line a. Select a single-angle tension member to resist the loads. Use LRFD. A) L 6 × 6 × B) L 5 × 3 × CL5×3× D) L 5 × 3 × -Select- 5 16 7 16 What is the required gross area? (Express your answer to three significant figures.) A₁ = in.² What is the required effective area? (Express your answer to three significant figures.) A = in.2 What is the minimum radius of gyration? (Express your answer to three significant figures.) "min = in. b. Select a single-angle tension member to…arrow_forward
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