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.

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2: A column is carrying an axial load W and an eccentric load P. If A is its cross-sectional area, e_x and e_y are the eccentricities and P_xx and Z_yy 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`

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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))`

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4: The economical depth d of a web plate in which allowable bearing stress is f_b, 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)`

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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`

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