15 (b) 2
Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)
5th Edition
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Saeed Moaveni
Chapter12: Electric Current And Related Variables In Engineering
Section12.2: Electrical Circuits And Components
Problem 6BYG
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Question
Classify each of the structures shown as statically determinate, or statically indeterminate, stable or unstable. If statically indeterminate externally, then determine the degree of statical indeterminacy. Show complete computations.
Use the formula given below.
Transcribed Image Text:-
(b)
11
11
Transcribed Image Text:Static Determinacy,
Internally Stable:
a. 3b + r < 3j
b. 3b + r = 3j
c. 3b + r > 3j
Internally Unstable
a. 3b + r <3j+ c
b. 3b + r = 3j + c
3b + r > 3j + c
c.
Indeterminacy and Instability of Plane Frames
the truss is statically unstable externally
the truss is statically determinate externally
the truss is statically indeterminate externally
DSI = (3b + r) - 3j
(internal supports):
the truss is statically unstable externally
the truss is statically determinate externally
the truss is statically indeterminate externally
DSI = = (3b + r) − (3j + c)
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