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Design of Pre-stressed Concrete Bridge Members


Quiz Questions

1. What is the time-dependent deformation of concrete under sustained load?
Creep of concrete
Curvature friction
Debonding
Coating
2. Maximum negative moments are to be considered as existing at the of the span.
Middle
Ends
3. In the design of the cross section, consideration shall be given to the ____________________ in web shear resulting from eccentric loading or geometry of structure.
Increase
Decrease
4. Changes in girder stem thickness shall be tapered for a minimum distance of ____________ times the difference in web thickness.
5
12
15
20
5. For segmental box girders, diaphragms shall be placed _________________ the box at span ends.
Above
Under
Within
None of the above
6. In calculating stresses in the deck panel due to negative moment near the stringer, no compression due to prestressing shall be assumed to exist.
True
False
7. The design shall provide for full transfer of shear __________________ forces at contact surfaces of interconnected elements.
Vertical
Horizontal
8. In structures with a cast-in-place slab on precast beams, the differential ________________ tends to cause tensile stresses in the slab and in the bottom of the beams.
Expansion
Shrinkage
9. The _______________ is the tensile force in the anchorage zone acting ahead of the anchorage device and transverse to the tendon axis.
bursting force
resistance
compressive stress
reinforcement
10. Intermediate anchorages shall not be used in regions where significant tension is generated ____________ the anchor from other loads.
In front
Behind