Rigid beam ABC is supported by a pinned connection at C and by an inclined strut that is pin-connected at B and D as shown. The strut is fabricated from two steel [E = 200 GPa] bars, which are each d= 75 mm wide and b= 15 mm thick. Between B and D, the bars are separated and connected by two spacer blocks, which are s = 30 mm thick. Assume that LAB= 0.95 m, LBc = 2.05 m, LcD = 1.55 m, P = 70 kN, The strut cross section is also shown. Determine (a) the compression force in strut BD that is created by the loads acting on the rigid beam. (b) the slenderness ratios for the strut about its strong and weak axes. (c) the minimum factor of safety in the strut with respect to buckling. Answers: (a) FBD= (b) (L/r)horz= LCD (L/r)vert = (c) FS= LAB i i i B spacer blocks- LBC (1) kN D Spacer block S b

Rigid beam ABC is supported by a pinned connection at C and by an inclined strut that is pin-connected at B and D as shown. The strut is fabricated from two steel [E = 200 GPa] bars, which are each d= 75 mm wide and b= 15 mm thick. Between B and D, the bars are separated and connected by two spacer blocks, which are s = 30 mm thick. Assume that LAB= 0.95 m, LBc = 2.05 m, LcD = 1.55 m, P = 70 kN, The strut cross section is also shown. Determine (a) the compression force in strut BD that is created by the loads acting on the rigid beam. (b) the slenderness ratios for the strut about its strong and weak axes. (c) the minimum factor of safety in the strut with respect to buckling. Answers: (a) FBD= (b) (L/r)horz= LCD (L/r)vert = (c) FS= LAB i i i B spacer blocks- LBC (1) kN D Spacer block S b

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Plane and Space Trusses

In civil engineering, a truss is the most important structure that forms the most fundamental member of any building structure and commercial complexes. Trusses are composed of individual members or links that are interconnected by suitable joints, such as rivets, welds, or bolts, and nuts. In trusses, the interconnection leads to the formation of a series of triangles joined together such that all the triangular members behave as a single rigid body. In a simple truss, three members are connected to form a truss member. In trusses, the force always acts at the joints or the interconnection between the individual members.

Question

Rigid beam ABC is supported by a pinned connection at C and by an inclined strut that is pin-connected at B and D as shown. The strut
is fabricated from two steel [E = 200 GPa] bars, which are each d= 75 mm wide and b = 15 mm thick. Between B and D, the bars are
separated and connected by two spacer blocks, which are s = 30 mm thick. Assume that LAB = 0.95 m, Lgc = 2.05 m, LcD = 1.55 m, P = 70
kN, The strut cross section is also shown. Determine
(a) the compression force in strut BD that is created by the loads acting on the rigid beam.
(b) the slenderness ratios for the strut about its strong and weak axes.
(c) the minimum factor of safety in the strut with respect to buckling.
A
Answers:
(a) FBD =
LAB
LCD
(L/r)vert=
(c) FS=
(b) (L/r)horz = i
tel
B
spacer
blocks-
LBC
(1)
kN
D
Spacer block
b S b

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