Total Duration: 1 hour a f Question 1: A one story building is idealized as a rigid girder supported by weightles as shown in Figure 1. In order to evaluate the dynamic properties of this structure, test is made, in which the roof system (rigid girder) is displaced laterally by a hydraul then suddenly released. During the jacking operation, it is observed that a force of R required to displace the girder R/20000 in .After the instantaneous displacement, the maximum release of displacement on the first return swing is R/25000 in a required to complete this cycle is 1.40 sec. Determine following a. Weight of girder b. Viscous damping coefficient c. Displacement amplitude after 6 cycles. Where R Your four digits university registration number (15 Question 2: Determine equivalent stiffness of the two hollow circular rods shown in along longitudinal axis (10 Weight W = mg 82 74 p=jacking force Figure 1