1. In a series of triaxial compression tests on a sandstone, the following repre-sent the stresses at peak load conditions:Testo3(MPa)o (MPa)11.05.09.515.09.228.0348.7474.0Determine values of S; and o that best fit the data.

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Answered: 1. In a series of triaxial compression…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A 30 ft tall column has a cross section of 8" x 8" with 1" thick walls, (i.e., it has a 6" x 6" hole in the middle). The material has a Young's Modulus E = 2,000,000 psi, and an axial yield stress of 1600 psi. Using a crushing FOS of 1.67 and a buckling FOS of 1.9, compute the following: a) What is the LARGEST axial load this column can sustain? Hetion b) If the column is braced (in both directions) at 10 feet above the ground, what is the maximum axial load the column can sustain?
Current Attempt in Progress Two solid bars support a load P as shown. Bar (1) has a cross-sectional area of A1 = 3150 mm2 and an allowable normal stress of 175 MPa. Bar (2) has a cross-sectional area of A2 = 2900 mm2 and an allowable normal stress of 140 MPa. Assume x1 = 1.9 m, x2 = 2.9 m, y1 = 1.4 m, and y2 = 2.4 m. Determine the maximum load Pmax that can be supported by the structure without exceeding either allowable %3D %3D normal stress. y2 A (1) В W P Answer: Pmax kN
Laboratory tests to determine shear strength parameters generally consists of direct shear and triaxial tests. Table 1 present data obtained from consolidated-undrained tests on a soft clay. Table 1: Triaxial test results At failure Pore water pressure (kN/m²) Cell pressure (kN/m²) Cu 200 400 800 Deviator stress (kN/m²) 117 242 468 110 227 455 Determine the shear strength parameters in terms of effective stress 3 90 ap uu im Cu to 207 415
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?
Current Attempt in Progress Two solid bars support a load P as shown. Bar (1) has a cross-sectional area of A₁ = 4650 mm² and an allowable normal stress of 80 MPa. Bar (2) has a cross-sectional area of A2 = 2800 mm2 and an allowable normal stress of 160 MPa. Assume x₁ = 1.5 m, x₂ = 3.1 m, y₁ = 1.5 m, and y2 = 2.5 m. Determine the maximum load Pmax that can be supported by the structure without exceeding either allowable normal stress. A Answer: Pmax= (1) i B (2) C kN 1/₂
Two foundations are located next to each other as follows. Determine the stress increase on a horizontal plane (i.e. - the increase in vertical stress) beneath Point A at a depth of 3 m below the ground surface. The foundations are bearing on the ground surface. 3 m- +2.5 m -6 m 5 m A O= 90 kPa = 120 kPa 6 m
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1. In a series of triaxial compression tests on a sandstone, the following repre- sent the stresses at peak load conditions: Test o3(MPa) o¡(MPa) 1 1.0 9.2 28.0 48.7 74.0 2 5.0 9.5 15.0 3 4 Determine values of S¡ and o that best fit the data.