The simply supported T-beam shown below is used in a corrosive environment to carry a service...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The simply supported T-beam shown below is used in a corrosive environment to carry a service load, consisting of 250 lb/ft dead load and 600 lb/ft live load over 40 ft. span, in addition to the self weight of the beam. Normal density concrete is used and the beam is pretensioned using multiple strands (Ap = 0.7 in²) having a constant eccentricity. The prestress at transfer is 65% ultimate and the time- dependent losses are equal to 10% of the prestress force at transfer. a) [6] Calculate stresses at midspan and support sections at transfer and under final conditions. b) [2] Compare the stresses a) with relevant permissible values given in ACI-318. The concrete strengths are 4,000 psi and 5,000 psi at transfer and in service, respectively. 30 in. 20 in. 5 in. Ap = 0.7 in². 5 in. 7 in. Fig. 1. A prestressed concrete beam under flexural loads (not to scale) The simply supported T-beam shown below is used in a corrosive environment to carry a service load, consisting of 250 lb/ft dead load and 600 lb/ft live load over 40 ft. span, in addition to the self weight of the beam. Normal density concrete is used and the beam is pretensioned using multiple strands (Ap = 0.7 in²) having a constant eccentricity. The prestress at transfer is 65% ultimate and the time- dependent losses are equal to 10% of the prestress force at transfer. a) [6] Calculate stresses at midspan and support sections at transfer and under final conditions. b) [2] Compare the stresses a) with relevant permissible values given in ACI-318. The concrete strengths are 4,000 psi and 5,000 psi at transfer and in service, respectively. 30 in. 20 in. 5 in. Ap = 0.7 in². 5 in. 7 in. Fig. 1. A prestressed concrete beam under flexural loads (not to scale)
Expert Answer:
Related Book For
Posted Date:
Students also viewed these chemistry questions
-
The simply supported T-beam shown below is used in a corrosive environment to carry a service load, consisting of 250 lb/ft dead load and 600 lb/ft live load over 40 ft. span, in addition to the self...
-
Read the case study "Southwest Airlines," found in Part 2 of your textbook. Review the "Guide to Case Analysis" found on pp. CA1 - CA11 of your textbook. (This guide follows the last case in the...
-
The cross section of the beam shown below is reinforced with 4 - HD244 mm bars placed in one layer. This beam has a simple span of 6.00 meters and carries the moving loads as shown. Design...
-
Class Median Midpoint, x Income, I 19.5 $12,965 An individual's income varies with age. The table shows the median income I of individuals of different age groups within the United States for a...
-
Garys TV had the following accounts and amounts in its financial statements on December 31, 2010. Assume that all balance sheet items reflect account balances at December 31, 2010 and that all income...
-
Vaughn, Inc., manufactures clamps used in the overhead bin latches of several leading airplane models. Thomas Taylor, president of Vaughn, Inc., has gathered the following cost information from the...
-
Using an elementary mechanics of materials approach, find the micromechanics equation for predicting the minor Poisson's ratio, \(v_{21}\), for a unidirectional fiber composite in terms of the...
-
Petes Petroleum, Inc., an SEC registrant with a calendar year-end, is in the business of constructing and operating offshore oil platforms. Petes Petroleum is required legally to dismantle and remove...
-
KFC, Pizza Hut, and Taco Bell locations are all franchised and operated by Yum China Holdings Inc., which is a corporation that specializes in the operation of fast-food restaurants in China. In...
-
The trial balance of Pacilio Security Services Inc. as of January 1, 2015, had the following normal balances: Cash ...................$62,860 Accounts receivable ............. 20,500 Supplies...
-
Adjusted Trial Balance Income Statement Balance Sheet Account Title Dr. Cr. Dr. Cr. Cr. Dr. Cash 379 Accounts Receivable 2,781 Supplies 126 Prepaid Insurance 95 Land 3,160 Equipment 1,264 Accum....
-
During extension, why do we sometimes get joints (and veins) and other times shear fractures and faults?
-
In countries in which there is nonprice rationing for care, waiting time costs may be substantial. How could you measure the economic costs of the waiting time?
-
It is important to compare items under the rubric of all else equal. What crucial factors must be adjusted when comparing health expenditures across countries?
-
Is fault sealing good or bad in terms of petroleum exploration and production?
-
How could a single-insurer health insurance system provide additional cost savings over a multiple-insurer system like that in the United States? Price 100 90 85 80 70 60 55 50 40 30 20 10 0 Quantity...
-
In the long run, the positive economic profits that the monopolistic competitor earns will attract a response either from existing firms in the industry or firms outside. As those firms capture the...
-
Prove that the mean heat capacities C P H and C P S are inherently positive, whether T > T 0 or T < T 0 . Explain why they are well defined for T = T 0 .
-
Show how you would synthesize the following compounds, starting with acetylene and any compounds containing no more than four carbon atoms. (a) hex-1-yne (b) hex-2-yne (c) cis-hex-2-ene (d)...
-
For each pair of compounds, state which compound is the better SN2 substrate. (a) 2-methyl-1-iodopropane or tert-butyl iodide (b) cyclohexyl bromide or 1-bromo-1-methylcyclohexane (c) 2-bromobutane...
-
Show how you would convert the following starting materials to the indicated nitriles: (a) Phe(nylacetic acid phenylacetonitrile (b) Phenylacetic acid 3-phenylpropionitrile (c) P-chloronitrobenzene...
-
Is an oscillating object in translational equilibrium?
-
How far above Farth's surface must a \(10,000-\mathrm{kg}\) boulder be moved to increase the mass of the Earthboulder system by \(2.50 \mathrm{mg}\) ? Assume the same ratio of energy change to mass...
-
Show that for small displacements the restoring force exerted on part 2 of the displaced string in Figure 15.14 is linearly proportional to the displacement of that part from its equilibrium...
Study smarter with the SolutionInn App