Question

In: Civil Engineering

. A prestressed road bridge of span 16 + 0.01 (35× 2) m consists of a...

. A prestressed road bridge of span 16 + 0.01 (35× 2) m consists of a concrete slab of 420 mm thick with parallel post-tensioned cables, in each of which the force at transfer is 440 kN. If the bridge is required to support a uniformly distributed applied load of 38 + 0.01 (135) kN/m , with tensile stress in the concrete not exceeding 0.85 N/mm2 at any time. Calculate the maximum horizontal spacing of the cables, their distance from the soffit of the slab at mid-span and their lowest possible position at
supports. Assume 15 % loss of prestress after transfer. Also calculate the number of steel wires used in each cable with the permissible stress of 1200 N/mm2 for 7 mm diameter steel wire. Assume the density of the concrete is 24 kN/m

Solutions

Expert Solution

Ally Wells answered 10 months ago
Next > < Previous

Related Solutions

prestressed road bridge of span 16.74 m consists of a concrete slab of 420 mm thick...
prestressed road bridge of span 16.74 m consists of a concrete slab of 420 mm thick with parallel post-tensioned cables, in each of which the force at transfer is 440 kN. If the bridge is required to support a uniformly distributed applied load of 43.37kN/m2 , with tensile stress in the concrete not exceeding 0.85 N/mm2 at any time. Calculate the maximum horizontal spacing of the cables, their distance from the soffit of the slab at mid-span and their lowest...
question 1 - Suppose that the Lo = 661 m main span of a steel bridge...
question 1 - Suppose that the Lo = 661 m main span of a steel bridge had no expansion joints. How much longer would the bridge be if the temperature increased from a cold winter at Tcold = –32 oC to a warm summer at Twarm = 30 oC? (The coefficient of linear expansion for steel is (alpha) α = 11 . 10-6 1/Co.) question 2 - A ball rolls along a surface, starting with an initial velocity of vo...
Show by calculations whether MnS (Ksp = 5.6 ✕ 10-16) will precipitate when a 0.01 M...
Show by calculations whether MnS (Ksp = 5.6 ✕ 10-16) will precipitate when a 0.01 M solution of Mn+2 containing 0.02 M H+1 is saturated with H2S (0.1 M). For H2S, K1xK2 = 6.3 ✕ 10-22 a) [Mn+2][S-2] Ksp; no, a precipitate will not form b) [Mn+2][S-2] > Ksp; yes, a precipitate will form      c) [Mn+2][S-2] < Ksp; yes, a precipitate will form d) [Mn+2][S-2] > Ksp; no, a precipitate will not form
A 3-blade wind turbine with a diameter of 16 m spins at 35 rpm at a...
A 3-blade wind turbine with a diameter of 16 m spins at 35 rpm at a 5000 m elevation where the average wind speed is 30 km/hr. The atmospheric pressure and temperature at that location are 98 kPa and -10 oC, respectively. There is a rotating wake behind the turbine. Neglecting the frictional drag, calculate the maximum power coefficient and maximum power.
2. A suspension cable has a span of 160 m and central dip of 16m. It...
2. A suspension cable has a span of 160 m and central dip of 16m. It carries a load of 5kN/m of horizontal length. Calculate the maximum and minimum tension in the cable. Find the horizontal and vertical forces in each pier under the following conditions: a) If the cable passes over frictionless rollers on the top of the pier. b) If the cable is firmly clamped to saddles on frictionless rollers on the top of piers. In each case,...
A rectangular channel 2 m wide has a bottom slope of 0.01 and a roughness coefficient...
A rectangular channel 2 m wide has a bottom slope of 0.01 and a roughness coefficient of 0.017. A sluice gate 2 m wide is located in the channel. The sluice gate has a contraction coefficient of 0.61 and a discharge coefficient of 0.58. The depth of water just upstream from the gate is 2 m. The depth of water just downstream from the gate is 0.5 m. Determine how far upstream from the gate the depth of water will...
Q2) A trapezoidal wadi 3 m wide and 2:1 side slope is to cross a road...
Q2) A trapezoidal wadi 3 m wide and 2:1 side slope is to cross a road at station 1+120. The drainage area is 50-hectare consisting of bare earth with steep slopes. A concrete box culvert is considered to drain the wadi assuming 15 minutes concentration-time and a 20-years return period. Determine the minimum width of the culvert to the nearest 10 cm assuming one meter maximum culvert depth, two meter allowable headwater depth, 1% culvert slope (same as the Wadi...
A galvanic cell consists of a lead electrode in 0.0256 M Pb(NO3)2 and a aluminum electrode...
A galvanic cell consists of a lead electrode in 0.0256 M Pb(NO3)2 and a aluminum electrode in 0.292 M Al(NO3)3. What is the cell potential (emf, in V) of this cell at 25oC?
A galvanic cell consists of a iron electrode in 1 M Fe(NO3)2 and a copper electrode...
A galvanic cell consists of a iron electrode in 1 M Fe(NO3)2 and a copper electrode in 1 M Cu(NO3)2. What is the equilibrium constant for this reaction at 25oC? Enter you answer with 2 significant digits, using the syntax of "1.0x10(22)" for "1.0x1022"
A galvanic cell consists of a iron electrode in 1 M Fe(NO3)2 and a copper electrode...
A galvanic cell consists of a iron electrode in 1 M Fe(NO3)2 and a copper electrode in 1 M Cu(NO3)2. What is the equilibrium constant for this reaction at 25oC? Enter you answer with 2 significant digits, using the syntax of "1.0x10(22)" for "1.0x1022 What is the cell potential (emf, in V) of this cell at 25oC? Cu |Cu2+ (0.0510 M) ‖ Br2 |Br- (0.363 M) What mass (in g) of aluminum can be electroplated when 0.855 amps are used...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT