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Published in

arXiv, 2022

DOI: 10.48550/arxiv.2205.12264

Journal of Theoretical, Computational and Applied Mechanics, 2022

DOI: 10.46298/jtcam.9615

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Efficient Update of Redundancy Matrices for Truss and Frame Structures

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Redundancy matrices provide insights into the load carrying behavior of statically indeterminate structures. This information can be employed for the design and analysis of structures with regard to certain objectives, for example reliability, robustness, or adaptability. In this context, the structure is often iteratively examined with the help of slight adjustments. However, this procedure generally requires a high computational effort for the recalculation of the redundancy matrix due to the necessity of costly matrix operations. This paper addresses this problem by providing generic algebraic formulations for efficiently updating the redundancy matrix (and related matrices). The formulations include various modifications like adding, removing, and exchanging elements and are applicable to truss and frame structures. With several examples, we demonstrate the interaction between the formulas and their mechanical interpretation. Finally, a performance test for a scaleable structure is presented.