CONCRETE STRUCTURES

Student Name:__________________________________
SS#: _________________
ARCH 5023/ ARCH 4343 - ARCHITECTURAL STRUCTURES II 

CONCRETE STRUCTURES  

UNIVERSITY OF OKLAHOMA - COLLEGE OF ARCHITECTURE 

EXAM 1
Friday 01.31.97

Please print clearly.
Show all work.
Include units of measurement.
Closed Book, Closed Notes, 
2 (8 1/2"x11") Summary pages allowed.
Multiple-Choice: 
Clearly mark only one correct answer for each question: 
Each correct answer is worth 2 points


1. Wind Tunnel tests are used for what purpose? ( 2 points)

	a.	thermal expansion tests	

	b. 	wind velocity measurements

	c. 	open terrain simulations

	d.	simple designs



2. Exposure B classifies which of the following cases ? ( 2 points)

	a.	high-rise structures	

	b. 	urban & suburban areas

	c. 	open terrain

	d.	coastal areas



3. A construction site is located half way between the 80 mph and 90 mph Zone.

	What is the basic wind speed (velocity) for the site? ( 2 points)

	a.	60 mph

	b.	80 mph

	c. 	85 mph

	d. 	90 mph

 

4. Who invented Portland Cement? ( 2 points)

	a.	The Romans

	b.	Foster & Parker

	c.  	Joseph Aspdin

	d.	Moneer



		                    				Student Name:_______________________	



5. Seismic Zone 4 is equivalent to what rating on the Richter Scale? ( 2 points)

	a.	4

	b.	7

	c.	two times the zone value

	d. 	no direct relationship between the two



6. The basic wind speed (velocity) for the State of Oklahoma is? ( 2 points)

	a.	60 mph

	b. 	75 mph

	c. 	90 mph

	d.	100 mph



7. What structural damage does the building code anticipate in seismic zone 1? (2P)

	a. 	none

	b.	moderate

	c.	major

	d.	great 



8. What is the Monroe Effect ? ( 2 points)

	a.	rain water suction

	b. 	chill factor for windows

	c.	wind from right only (from left under British code)

	d. 	wind turbulence (uplift) in between high-rise structures



9. What is the soil factor for rock or gravel? ( 2 points)

	a.	0

	b. 	1.0

	c.	1.2

	d.	1.5



10. Buildings with more than 300 people fall under what occupancy category? (2 p)

	a.	I

	b. 	II

	c.	III

	d.	IV

 

11. The cantilevers on a pier foundation should be limited to? ( 2 points)

	a.	S = span

	b.	S/2

	c. 	S/4

	d.	0



12. What seismic zone is Oklahoma City in? (2 points)

	a. 	1

	b.	2

	c.	3

	d.	4



13. What is a Shear Wall as defined by BOCA? (2 points)

	a.	any concrete wall

	b.	two pieces of steel forming a diagonal

	c. 	a wall designed to resist lateral forces parallel to the wall

	d.	a 8'x4' sheet of 1/8" plywood nailed to studs 24" O.C. 



14. What is the typical width of a poured or concrete block foundation wall? ( 2 points)

	a.	4"

	b.	6"

	c. 	8"

	d.	1'



15. What is the minimum bearing for steel beams on top of foundation walls? ( 2 points)

	a.	2"

	b.	3"

	c. 	4"	

	d.	6"



16. What is the maximum unsupported height for concrete pier foundations? (2 points)

	a.	1 x min. width of pier

	b.	2 x min. width of pier

	c.	5 x min. width of pier

	d. 	10 x min. width of pier



Short Answer Questions:



17.  How large is the overturning moment for a building? ( 4 points)









18. Wind Forces are a special problem with? ( 3 points max.)









19. Name the (2) Design Methods used to account for Wind forces (4 points)











20. Name 4 elements which Laterally stabilize a building. (4 points)















21. Name the components in a concrete mix. (3 points + 1 bonus point)











22. The design of column footings is usually based on the following 6 considerations. (6 points)

















23. Sketch a individual footing for a wood post and indicate min. distance to grade. ( 4 points)





















24. Sketch a Concrete Slab on Grade Section indicating min. thickness.( 4 points)





















		                    				Student Name:_______________________	

Calculations:



25. Problem: ( 5 points)

You are working on a hill side construction project in Hawaii. Given a wind speed of 110 mph.

What is the wind stagnation pressure under UBC code?

Show all formulas and calculation steps!





		                    				Student Name:_______________________	

Calculations:



26. Problem: ( 6 points)



A 8 inch wide 2000 psi concrete column is loaded with 100 k.

The maximum soil pressure according to tests is 2,000 lb/sqft.

What are the footing dimensions (h) and (w) for a square concrete column footing?







 

		                    				Student Name:_______________________	

27. Problem: (12 points) 

You are designing a 150'x100', 15 story, flat-roof, concrete office building, with 10' finished floor to finished floor ceiling height, on rock, at the corner of  McCormick & Lake Drive in downtown Chicago,IL less than 1 mile from Lake Michigan under BOCA building code.

Determine the design pressure in determining the wind loads for the main windforce-resisting system.   





                   				Student Name:_______________________	

28. Problem: ( 12 points)

You are designing a 150'x100', 15 story, flat-roof, concrete office building, with 10' finished floor to finished floor ceiling height, on gravel, at the corner of Santa Monica Blvd. & Ocean Avenue  in Los Angeles under UBC building code.

Determine the seismic shear force acting on the structure.