Use the following information for Problems 1-3 The plan view of the building shown below has four concrete shear walls a

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Use The Following Information For Problems 1 3 The Plan View Of The Building Shown Below Has Four Concrete Shear Walls A 1 (136.69 KiB) Viewed 37 times

Use the following information for Problems 1-3 The plan view of the building shown below has four concrete shear walls and an AC unit. The west wall has a parapet of 4 feet above the roof. The unit weight of the roof and walls are 50 and 62 pounds per square foot respectively. The AC unit weighs 2.5 tons. The relative rigidities of all walls are shown and all walls have the same thickness of 4.0 inches. Seismic design category (SDC) C and Sps = 0.80g. Consider the unit weight of concrete 140 pcf. 30 60 AC unit T R=8 C R=12 50 AC unit R=7 30 12 R=8 15 PLAN SECTION G-C 1- Calculate the coordinates (x, y) of the center of mass (CM) 2- Calculate the coordinates (x, y) of the center of rigidity (CR) using the given relative rigidities. 3- The plan view of a one-story masonry shear wall structure with a rigid roof diaphragm is shown below. The relative rigidities for walls “A” through “D” are indicated.