(Created 2010-07-25.)

ENGINEERING MODELLING: ANALYSIS OF STRUCTURES | VSMF05 |

**Aim**

Analysis of bars, beams, trusses and frames belongs to the most common computing tasks for a structural engineer. The aim of the course is to give knowledge of how to define physically correct models and to use them for solving engineering problems. The generality of the element based analysis method is emphasized by the fact that also one-dimensional flow problems such as thermal conduction, diffusion and groundwater flow are treated.

*Knowledge and understanding*

For a passing grade the student must

- be able to theoretically model bars, beams, trusses, frames and one-dimensional flow problems such as thermal conduction, diffusion and groundwater flow.

*Skills and abilities*

For a passing grade the student must

- be able to use element based displacement method to analyse trusses, frames and one-dimensional flow problems.
- be able to choose suitable models for analysing structures, including dividing the structure into elements, defining degrees of freedom, and defining support conditions and loads.
- be able to perform computer based analysis of the structures in question.
- be able to present a clear written description of basic conditions, model for analysing the structure, and results from computations performed by hand and using computer, for different applications.

*Judgement and approach*

For a passing grade the student must

- be able to assess if the obtained results are in accordance with the assumed conditions and the defined computational model.

**Contents**

Matrix algebra. Introduction to discrete systems. Bar and beam elements. Element-based analysis of trusses and frames. Aspects of modelling; symmetry, hinges in frames, subsidiary conditions, static condensation, reduced systems of equations. One-dimensional scalar problems; thermal conduction, diffusion, groundwater flow, pipe network and electrical circuit. Beams and supports on elastic foundation. Frames and trusses considering geometric nonlinearity and instability. Frames and trusses considering material nonlinearity.

**Literature**

Dahlblom O, Olsson K.-G.: Struktumekanik- modellering och analys, Byggnadsmekanik, Lunds tekniska högskola 2009.

CALFEM ver 3.4 - A finite element toolbox, Studentlitteratur AB, 2004.