Steel Structure Design

1

If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by

A. ` P_s = N xx (pi//4) d^2 xx P_s`
B. ` P_s = N xx (d xx t xx p_s)`
C. ` P_s = N xx (p - d) xx t xx P_s`
D. `P_s = N xx (P + d) xx t xx p_s`
E. none of these.

2
A column is carrying an axial load W and an eccentric load P. If A is its cross-sectional area, ex and ey are the eccentricities and Pxx and Zyy the section modulli, the equivalent axial load is obtained from the formula,


A. `P_(ep) = P_E (1 + (Ae_e)/(Z_(xxxx)) + (Ae_y)/(Z_(xxxx))) + W`
B. `P_(ep) = P_E (1 + (Ae_e)/(Z_(xxxx)) - (Ae_y)/(Z_(xxxx))) + W`
C. `P_(ep) = P_E (1 - (Ae_e)/(Z_(xxxx)) - (Ae_y)/(Z_(xxxx))) + W`
D. `P_(ep) = P_E (1 + (Ae_e)/(Z_(xxxx)) - (Ae_y)/(Z_(xxxx))) - W`
E. `P_(ep) = P_E (1 - (Ae_e)/(Z_(xxxx)) - (Ae_y)/(Z_(xxxx))) - W`

3

 

If P is the allowable bending stress in a slab, whose greater and lesser projections from the column faces, are A and B, the thickness (t) of the slab base, is (where w is the intensity of earth pressure.)

A. ` t = sqrt((3W)/(P) (A^2 + B^2/4))`
B. ` t = sqrt((3)/(P) (A^2 + B^2/4))`
C. ` t = sqrt((3W)/(P) (A^2 - B^2/4))`
D. ` t = sqrt((P)/(3) (A^2 + B^2/4))`

4

The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

A. `d = root[3] (M/f_b)`
B. `d =1.5 root[3] (M/f_b)`
C. `d =2.5 root[3] (M/f_b)`
D. `d =3.5 root[3] (M/f_b)`
E. `d =4.5 root[3] (M/f_b)`

5

 

If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

A. `(D^2 T)/(250) xx R/W`
B. `(D^3 T)/(250) xx R/W`
C. `(D T)/(250) xx R/W`
D. `(D T)/(250) xx W/R`