Displacement and force control of complex element structures by Matrix Condensation

Saeed, Najmadeen M. and Kwan, Alan S. K. ORCID: https://orcid.org/0000-0003-4206-4435 2016. Displacement and force control of complex element structures by Matrix Condensation. Structural Engineering and Mechanics 59 (6) , pp. 973-992. 10.12989/sem.2016.59.6.973

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Abstract

A direct and relatively simple method for controlling nodal displacements and/or internal bar forces has been developed for prestressable structural assemblies including complex elements ("macro-elements", e.g., the pantographic element), involving Matrix Condensation, in which structural matrices being built up from matrices of elementary elements. The method is aimed at static shape control of geometrically sensitive structures. The paper discusses identification of the most effective bars for actuation, without incurring violation in bar forces, and also with objective of minimal number of actuators or minimum actuation. The advantages of the method is that the changes for both force and displacement regimes are within a single formulation. The method can also be used for adjustment of bar forces to either reduce instances of high forces or increase low forces (e.g., in a cable nearing slack).

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	Techno-press Ltd
ISSN:	1225-4568
Date of Acceptance:	15 April 2016
Last Modified:	01 Nov 2022 11:28
URI:	https://orca.cardiff.ac.uk/id/eprint/95071

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