I. Single-choice questions.: 1. Crowd load is a kind of . ( ) A. Permanent action B. Variable action C. Accidental action D. Combined action 2. One-way slab in bridge refers to the four side supported bridge deck with an aspect ratio of length over width . ( ) A. Greater than 1 B. Less than or equal to C. Greater than or equal to 2 D. Less than 22
I. Single-choice questions.:
1. Crowd load is a kind of . ( )
A. Permanent action
B. Variable action
C. Accidental action
D. Combined action
2. One-way slab in bridge refers to the four side supported bridge deck with an aspect ratio of length over width . ( )
A. Greater than 1
B. Less than or equal to
C. Greater than or equal to 2
D. Less than 22
3. A simply supported beam bridge with a structural importance coefficient of 1.0. The mid span bending moment under dead load MG1 is 300 kN(m, the mid span bending moment under traffic load MQ1 is 1200 kN(m, and the mid span bending moment under crowd load MQ2 is 250 kN(m. According to the basic combination, what are the combined values of bending moment in the middle of span? ( )
A. 2302.5 kN(m
B. 2390.0 kN(m
C. 1750.0 kN(m
D. 2062.5 kN(m
4. The change of the load distribution coefficient in the longitudinal direction should be considered when calculating induced by the live load of a simply-supported beam bridge. ( )
A. Bending moment at L/2 point
B. Shear force at L/2 point
C. Bending moment at L/4 point
D. Shear force near the bearings
5. Bridge piers belong to which part of a bridge? ( )
A. Bridge superstructure
B. Bridge substructure
C. Bridge deck system
D. Bridge foundation
6. When calculating the load transverse distribution coefficient (m) near the bearing supports of a simply-supported beam bridge, which kind of calculation method is recommended? ( )
A. Lever principle method
B. Hinge joint slab method
C. Eccentric compression method
D. G-M method
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