Techno Press
You logged in as Techno Press

Structural Engineering and Mechanics
  Volume 43, Number 3, August10 2012 , pages 273-285
DOI: https://doi.org/10.12989/sem.2012.43.3.273
 


An efficient approach to structural static reanalysis with added support constraints
Haifeng Liu, Baisheng Wu and Zhengguang Li

 
Abstract
    Structural reanalysis is frequently used to reduce the computational cost during the process of design or optimization. The supports can be regarded as the design variables in various types of structural optimization problems. The location, number, and type of supports may be varied in order to yield a more effective design. The paper is focused on structural static reanalysis problem with added supports where some node displacements along axes of the global coordinate system are specified. A new approach is proposed and exact solutions can be provided by the approach. Thus, it belongs to the direct reanalysis methods. The information from the initial analysis has been fully exploited. Numerical examples show that the exact results can be achieved and the computational time can be significantly reduced by the proposed method.
 
Key Words
    structural static reanalysis; Cholesky factorization; increase of support constraints; stiffness matrix; computational cost
 
Address
Haifeng Liu: Department of Mathematics, School of Mathematics and Statistics, Xi\'an Jiaotong University,
Xi\'an 710049, P.R. China
Baisheng Wu: Department of Mechanics and Engineering Science, School of Mathematics, Jilin University, Changchun 130012, P.R. China
Zhengguang Li: Department of Mathematics, School of Mathematics and Statistics, Xi\'an Jiaotong University,
Xi\'an 710049, P.R. China
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2023 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: info@techno-press.com