1. The three-member (ABC, AD and BD) frame shown in Fig. 1 is subjected to a force P and a moment, M. Determine the average normal stress in member AD, which has circular section with diameter 30 mm, for P = 25 kN and M = 2 kN.m. If the member AD is to be made from wood which has ultimate stresses as 50 MPa in tension and 30 MPa in compression; what will be the factor of safety of the member AD without considering pin connections. P -イ… 1.0m B M 60° 60° D -2.0 m

1. The three-member (ABC, AD and BD) frame shown in Fig. 1 is subjected to a force P and a moment, M. Determine the average normal stress in member AD, which has circular section with diameter 30 mm, for P = 25 kN and M = 2 kN.m. If the member AD is to be made from wood which has ultimate stresses as 50 MPa in tension and 30 MPa in compression; what will be the factor of safety of the member AD without considering pin connections. P -イ… 1.0m B M 60° 60° D -2.0 m

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

Composite Construction

Composite construction is the construction of structures in which two or more materials are used. Regarding structural engineering, composite construction is a construction where two materials are bound together in a technical manner such that both the materials act as a single unit to carry and transfer the load. The motives of composite construction are to increase the structural strength, make structures more aesthetic, and provide a sustainable environment.

Question

1. The three-member (ABC, AD and BD) frame shown in Fig.1 is subjected to a force P and
a moment, M. Determine the average normal stress in member AD, which has circular
section with diameter 30 mm, for P = 25 kN and M = 2 kN.m. If the member AD is to be
made from wood which has ultimate stresses as 50 MPa in tension and 30 MPa in
compression; what will be the factor of safety of the member AD without considering pin
connections.
P
---f--
1.0 m
B
M
A
60°
60°
D
-2.0 m
Figure 1
Answer: F.S.=1.85

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