A circular Beam with roller joint R L y y oo = 298.6055 Pa Ro = 2.0649 m L = 61 m Material Data E[ GPA] Oyp [MPa] p [kg/m^3 V 200 0.3 700 7800 Find: Displacement in X, Y, Z direction, von misses stress, tresca stress, and triaxial stress at x = L, at x = L/2 and x = 0. Please show all work

For the drilled shaft described in Problem 19.7, estimate the total elastic settlement at working load. Use Eqs. (18.45), (18.47), and (18.48). Assume that Ep = 20 106 kN/m2, s = 0.3, Es = 12 103 kN/m2, = 0.65 and Cp = 0.03. Assume 80% mobilization of skin resistance at working load. (See Part c of Problem 19.7) 19.7 Figure 19.16 shows a drilled shaft without a bell. Here, L1 = 6 m, L2 = 7 m, Ds = 1.5 m, cu(1) = 50 kN/m2, and cu(2) = 75 kN/m2. Find these values: a. The net ultimate point bearing capacity. Use Eqs. (19.23) and (19.24) b. The ultimate skin resistance. Use Eqs. (19.26) and (19.28) c. The working load, Qw (FS = 3) FIG. 19.16

Earth Sciences Downward force is 4000 kg and rotational force is 3000 kg. Contact surface area (cross sectional area) is 100 cm2. Also, the rock sample (diameter: 20 cm) is tested by a uniaxial compressive strength machine and the sample was cracked at 30000 kg. Answer the following questions:a. Find the resultant force acting on the rock formation.b. Find the bearing strength of the rock drilled.c. Can we drill under these circumstances?

Hint: The problem is 10.10 taken from the book " introductory to mining engineering " written by "Howard L.Hartman" A single rectangular opening 10 ft in height is driven in rock having strengths of fc=18000 lb/in2 and ft= 1500 lb/in2. Rock specific gravity is 2.3. The opening is located at a depth of 2000 ft in a stress field of no lateral pressure and has a fillet ratio of 1/6. (a). Determine if the opening will fail when its width is 20 ft ? (b). What is the maximum safe width of the opening?.A single rectangular opening 10 ft (3.0 m) in height is driven in rock having strengths of fc = 18,000 lb/in2 (124 MPa) and ft=1500 lb/in2. (10.3 MPa).Rock specific gravity is 2.3.The opening is located at depth of 2000 ft (610 m) in a stress field of no lateral pressure and has a fillet ratio of 1/6 .a. Determine if the opening will fail when its width is 20 ft (6.1 m).b. Is there any benefit to reducing the width to 10 ft (3.0 m)? To 5 ft (1.5 m)?c. What is the maximum safe width of opening?

2: An embankment shown in the figure is constructed. compute the vertical stress increment under Points A. B. and C at z = 10 m Use vertical stress Increment under an embankment loads? 10 m 12 m 10 m Y₁-192 kN/m² Take value of 15 from chart s6v=9[s

A 3 ft diameter straight drilled shaft is shown in Figure P13.7. Determine the load-carrying capacity of the drilled shaft with FS = 3. Take / as 0.8 for the sand.

o T ☺ ť (Q4): For the soil profile shown in figure (2) find the difference in stress in (kPa) at point located at a depth (10m) under the center of the circular foundation when using the below formulas and when using the approximation method 1 Ao, = q [(R/2)* + 1] Dia4m q0.21 N/mm N.G.S Sand e0.8 G.-2.6 3m W.L e0.7 G-2.7 5m Clayey - Sand e045 G.-2.68 مر ر ل لأعلى لاستعراض الفلاتر إضافة شرح. .. mum < II

3. The A-36 steel drill shaft of an oil well extends 12000 ft into the ground. Assuming that the pipe used to drill the well is suspended freely from the derrick at A, determine the maximum average normal stress in each pipe string and the elongation of its end D with respect to the fixed end at A. The shaft consists of three different sizes of pipe, AB, BC, and CD, each having the length, weight per unit length, and cross-sectional area indicated. AAB= 2.50 in.² WAB= 3.2 lb/ft ABC= 1.75 in? WBC= 2.8 lb/ft ACD= 1.25 in.² WCD= 2.0 lb/ft B C D 5000 ft 5000 ft 2000 ft

www Problem 2 For the stress conditions given, determine the Maximum Shear Stress (Tmax) value from the Mohr Circle. 18 psi 26.5° 16 psi 20 45⁰ 30