In the direct stiffness method, the diagonal coefficient Kii physically represents the force at coordinate i caused by
Correct answer: B. A unit displacement at i with other coordinates fixed
- A. A unit load at i with all coordinates free
- B. A unit displacement at i with other coordinates fixed
- C. A unit rotation at every coordinate
- D. A unit displacement at another coordinate with i fixed
Explanation
Kii is the restoring force or moment at coordinate i produced by imposing a unit displacement at the same coordinate while all other nodal coordinates remain fixed. A coefficient Kij with i not equal to j represents the corresponding interaction between different coordinates.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Structural Analysis
Structural analysis determines how beams, frames, trusses and arches carry loads through reactions, shear forces, bending moments, axial forces and deflections. It covers free-body diagrams, equilibrium equations, determinacy, influence lines and methods such as slope deflection, moment distribution and virtual work, while distinguishing analysis of a structure from its design.
Practise Structural Analysis
78 free Structural Analysis MCQs from Civil Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Civil Engineering questions like this
Civil Engineering is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Structural Analysis questions
For a structure in equilibrium, the principle of virtual work states that the virtual work of the external forces is equal to the
In the approximate portal method for a multistorey frame under lateral loading, points of contraflexure are commonly assumed at the
In the force method, what is done to form the primary structure of a statically indeterminate system?
A unit load moves across a simply supported beam of span L. If x is its distance from the left support, the influence-line ordinate for the left reaction is
For a beam segment without a distributed load, the relationship between bending moment M and shear force V is
In the force method, what compatibility condition is imposed after selecting the redundant forces?