1 The weight W of the building is 200 kips and the building is set into free vibration by releasing it (at time t = 0) from a displacement of 1.20 in. If the maximum displacement on the return swing is 0.86 in at time t = 0.64 sec, determine: a) the lateral spring stiffness k b) the damping ratio c) the damping coefficient c

Design a steel hollow column of length 15-m with minimum weight for a water tank such that it can carry a water tank of 45000 kg. The tank is to designed such that to withstand a ground vibration due to an earthquake. The earthquake excitation is idealized as undergoing a harmonic ground acceleration of amplitude of 0.5 g. The natural frequency of the water tank should exceed 20 Hz. Assume the Yield Strength for the steel to be 250 MPa. Assume a damping ratio of = 0.2. D 5(1)

determine the bending stress developed at point A. enter negative value in the case of compression and positive value in the case of tension determine the bending stress developed at point B. enter negative value in the case of compression and positive value in the case of tension determine the bending stress develpoed at point C. enter negative value in the case of compression and positive value in the case of tension

1000 N/m Given: A cantilever beam has loading and cross section as shown. The allowable stress is 64 MPa. 150 mm Determine: the minimum width for the beam 6 m b