An earthquake produces a longitudinal pressure wave called a P-wave that travels through thebody of the earth at speed1.4B37.8 km/sThe quake also produces a transverse wave called an S-wave that travels at a speedV4.5 km /sIf the earth's density p equals 2400 kg/m', use the preceding information to calculate the (a) bulkmodulus B and (b) shear modulus S of the earth.

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Answered: An earthquake produces a longitudinal…

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 simply supported beam, having a length of 8.5 m, is being subjected to a concentrated live load of 20 kN, and a concentrated dead load of 15 kN, both at midspan of the beam. Neglecting the weight of the beam, take Ec = 20,000 MPa, and le = %3D 4000x10^6 mm^4. a)What ks the value of Ma(DL+LL)? b.) What is the value of Instantaneous deflection at Midspan (DL+LL)
Air flows past an object in a pipe of 2-m diameter and exits as a free jet as shown in Figure Q4. The velocity and pressure at upstream are uniform at 10 m/s and 50 N/m, respectively. At the pipe exit the velocity is non-uniform as indicated in the figure. The shear stress along the pipe wall is negligible. Determine: (a) the head loss associated with a particle as it flows from the uniform velocity upstream of the object to a location in the wake at the exit plane of the pipe; (b) the force that the air puts on the object. Air 4 m/s 2-m-dia. Wake 1-m dia. 12 m/s Exit p = 50 N/m? V = 10 m/s Figure Q4
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4) A large moveable plate is located between two large plate as shown in the figure. Determine the magnitude and direction of the shearing stresses that act on the fixed walls when the moving plate has a velocity of 4 m/s. Assume that the velocity distribution between the plates is linear Fixed plate 6 mm H- 0.02 N. sim 4 m/s 3 mm A = 0.01 N• sim Fixed plate
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A steel bar 25 mm wide and 50 mm deep is freely supported at two points 1 m apart and carries a mass of 200 kg in the middle of the bar. Neglecting the mass ofthe bar, find the frequency of transverse vibration.If an additional mass of 200 kg is distributed uniformly over the length of the shaft, what will be the frequency of vibration? Take E = 200 GN/m2.
A platform of weight = 5000 lb is supported by four identical columns (E = 29000ksi, I = 69.2 in4) with a length of 12 ft, assumed to have fixed supports. It was determined from a free vibration test that the ratio of displacements three cycles apart is 10.237. Duringan earthquake, it was determined that the maximum force was 50 lb. It was also observedthat a cycle of oscillation occurs every 3.979 s. The earthquake lasted for 15 s. What is the displacement 10 s after the earthquake stopped?HINT USING THREE MOMENT EQUATION
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5. A solid steel disk E=200X10^9 N/m^2 start rotation from the rest with constant acceleration. When the disk changed an angular position by 180 degrees, a small disk attachment (hummer) hit an aluminum rod E = 70 x 10^9 N/m^2. At that moment the angular velocity was 2500 rad/s. Diameter of the aluminum rod is 0.1 m. Please, find strain in the rod. R= 2m Rad Wo = O lad diolm We=2500 A- - R. hummeR Eslal-200 *10 Ene %3D Al
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