Design Problem 5 Determine the spacing of 10 mm U Stirrups required for the beam of design problem 4.0 at Ls = 1.10 m from the support if fpu is 1,724 MPa for the prestressing steel and fy for the stirrups is 276 MPa. Aps = 945.16 mm² (Use NSCP Equation, Table 409.6.3.3e)

12. Assume a uniformly load simply support beam with a rectangular cross section. The width of the beam is fixed by other design considerations. Determine the ratio between the difference in depth required for an aluminum beam compared to a steel beam in order to obtain the same maximum deflection. MOE aluminum can be taken as 10,000 ksi, for steel as 30,000 ksi. The maximum deflection for the beam is 5wl*/384EI Factoring the deflection equations we can conclude that for equal deflection Eala = Esls where subscripts a and s represent values for aluminum and steel. The depth of must be times the depth of the

SEA 2002 (c) total elongation o stretch the wire 45 mm and 3 9.20 A steel rod 10 ft long is made up of two 5 ft lengths, one in. in diameter and the other in. in diameter. How much will the bar elongate when subjected to an axial tensile load of 5000 lb? 9.21 A titanium alloy bar elongates 0.500 in whor

2/3 700 mm 1) A typical cross-section of a properly reinforced con-crete beam is shown in the figure below. The material properties are summarized below. Use an effective depth of 600 mm. 500 mm Given: fy = 400 MPa = 0.65 75% = 0.85 E = 200 000 MPa Y See the Table 1 f' 48MPa - Bar : 3-30M a) Is the beam properly reinforced/over-reinforced/ balanced Determine the factored moment resistance? b) Consider the beam section "a) "above. However, due to embedded items, the reinforcing is raised by 65 mm, such that the effective depth is reduced to 585 mm (Draw the new cross-section view). Find the factored moment resistance considering the new reinforcement layout. c) Comment on the effect of the change in reinforcement location on the moment resistance d) Refer to the beam section from Part "b" above. The same contractor reported that, due to some problems related to batching, the actual 28-day concrete strength is reduced by 10%. What is the new F'c? Find the factored moment resistance for…