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Problems:
1. Complete text problem 11.1 on page 459:
Answer: T = 600 lb/in, f = 12,000 lb/in^2
2. Complete text problem 12.7 on page 483. Note: Include the concrete dead load when the density of concrete is 150 lb/ft^3_. Also, the answer should be T = 1,007,283 lb._ 3. For the reinforced concrete shell of Problem 2, determine the meridional and hoop forces at the base of the shell. Answer: N ๏ฆ = 10,720 lb/ft, N ๏ฑ = 5254 lb/ft 4. Develop an upper-level and lower-level roof framing system over the floor plan of the small Art Studio shown. Your design should be structurally sound, efficient, and accommodate all programmed conditions and requirements. Show the layout of columns and/or load-bearing walls, the placement of beams and lintels, and the location of all roof joists. Indicate the span direction of decking with an arrow.
12.7.
12.
12.7 (^) 12.6.
5. Determined the maximum moments (positive and negative) for a beam of 65 ft with a distributed load of 70 lb/ft for a ) the optimal support location with one overhang and b ) the optimal support location with two overhangs ( see section 6.4.1 ). Answer: a) M 1 = M 2 = 12,717 lb-ft, b) M 1 = M 2 = 6,211 lb-ft 6. The gulf coast of the United States (along Texas, Louisiana & through to Florida) can experience strong wind gusts from large wind speeds, sometimes due to hurricanes. Identify two other regions of the United States with basic wind speeds (3-second gust) of 130 miles per hour at 33 ft above ground for Exposure C category that are not in special wind regions. 7. Describe vortex-shedding and the problems it causes tall structures. 8. In 1974 the Texas panhandle (western portion) experienced a 4.5 magnitude earthquake which caused cracking in plaster (intensity V). What does the magnitude and intensity tell you about the energy and damage from the ground acceleration? How does the Texas earthquake compare to the 6.3 (strong) magnitude earthquake in Java, Indonesia in May of 2006 where more than 127, houses were destroyed and an additional 451,000 were damaged in the area, with the total loss estimated at approximately 3.1 billion U.S. dollars? 9. In the aftermath of national and international disasters, infrastructure management and hazardous response has been a major focus of research and funding. How does this concern relate to architectural considerations other than structural performance?
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