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A rectangular beam made using concrete with f'c = 6000 psi and steel with fy=60000 psi has a width b= 20 in. The concrete modulus of rupture fr=530 psi. The elastic moduli of the concrete and steel are, respectively, Ec=4,030,000 psi and Es= 29,000,000 psi. The tensile steel consists of four No. 11 (No. 36) barsa. Find the maximum service load moment that can be resisted without stressing the concrete above .45f'c or steel above .40fyb. Determine whether the beam will crack before reaching the service loadc. Compute the nominal flexural strength of the beamd. Compute the ratio of the nominal flexural strength of the beam to the maximum service load moment, and compare your findings to the ACI load factors and strength reduction factor.
A bridge is subjected to a load of 10,000 kN at its mid span, yielding a displacement of 5 millimetres at that location. What will be the bending stiffness of the bridge in this case (make sure the unit is given)
An equal-tangent crest vertical curve connects a +3.2% and -1.1% grade. The PVI is at station 98+20. Due to drainage considerations, the highest point of the curve is at station 100+79.35.
Find a solid steel shaft to transmit 100 hp at a speed pf 1200 rpm, if the maximum shearing stress is not to exceed 7500 psi.
You are going to assemble 1,000 bolt + hole combinations. The bolts have a mean diameter of 1.000 cm, normally distributed with standard deviation of 0.010 cm. The holes have a mean diameter of 1.030 cm, normally distributed with standard deviatio..
The wastewater influent has a linear velocity of 0.5m/s and contains 3.0x10^5 fecal coliform colony unit (CFU) per liter. Determine the coliform concentration of the discharge effluent into Back river.
A cylindrical tank having a diameter d=2.5 inches is sunjected to internal gas presuure p=600 psi and an external tensile load T=1000 lbs. Determine the minimum thickness t of the wall of the tank
A rectangular channel carries a flow of 10 cfs/ft of width. Plot a curve of specific energy vs depth. Compute the minimum value of specific energy and the critical depth. What are the alternative depths for Es = 5.0
What difference does the tightening of bolt in the friction grip joint make to the load at first slip and the failure load.
A hollow circular, gray cast-iron pipe supports a red brass rod and weight W = 2 kips, as shown. The outside diameter of the pipe is d = 6". If the allowable compressive stress in the pipe is 5000 psi and the allowable shortening of the pipe is 0...
The partial pressure of the gasses in a 22,414-L volume of air at STP are: oxygen, 21,224 kPa; nitrogen, 79,119 kPa; argon, 0.946 kPa; and carbondioxide, 0.036 kPa. Determine the gram molecular weight of air.
The uniform 25 kg plate is welded to the vertical shaft, which is supported by bearings A and B. Calculate the magnitude of the force supported by bearing B during application of the (M =) 140 N·m couple to the shaft.
The heat exchanger consists of 12 m of copper tubing that is 2 cm in diameter with 19 return bends. The flow rate is 3 x 10-4 m3/s. Water enters at 20 C and exits at 80 C. The elevation difference between the entrance and the exit is 0.8 m.
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