CIE 681 Classical Structural Analysis Spring Semester 2015 ____________________________________________________________________________________________________________

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Assignment #2 Due date: February 27, 2015 (4 pm).

NOTE: The calculation of wind pressures in your textbook is based on ASCE 7-05. In this class, we have discussed the ASCE 7-10 wind provisions. Thus, DO NOT use the ASCE 7-05 importance factor, I, in your calculations. 1. Problem 2.8 of your textbook. 2. Problem 2.11 of your textbook. Note that the Cp coefficients in Table P2.11 of your textbook are the same as those found in Table 27.4-1 of ASCE 7-10. 3. Problem 2.12 of your textbook. 4. Problem 2.14 of your textbook. 5. Problem 2.15 of your textbook. 6. An enclosed office building is located in a region with a basic wind speed of 120 mph. The exposure is C and the building is on flat terrain. The building has plan dimensions of 50 x 90 and an elevation of 22. The roof is flat. The building has a period of vibration of 0.30 s. The design spectral accelerations at the site are SDS =0.25g and SD1 = 0.05g. Seismic effective weights are 250 k and 150 k for the second floor and roof, respectively. The lateral load resisting system corresponds to ordinary reinforced masonry shear walls. Determine:

a) The wind pressures applied to the windward and leeward surfaces and the net forces applied to the building in each direction.

b) The seismic base shear in each direction.