Original scientific paper

INFLUENCE OF MODELLING ON TRUSS STRESS ANALYSIS RESULTS

Diana Šimić orcid.org/0000-0001-5862-1852 ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia
Tanja Ilijaš ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia

Abstract

In order to determine the real state of stress in a reinforced concrete truss and to determine the impact of restraint rods in the truss nodes on the stress in the beam, a theoretical and an experimental analysis of stress in reinforced concrete truss were conducted. The analytical modelling is conducted for the idealized truss system with hinges in nodes, and separately for the realistic truss system with rigid nodes. The numerical modelling is conducted using the finite-element method, and the experimental modelling is made using the concrete Warren truss, while a dimensional analysis is used for the comparison of results. In all elements of the realistic truss with rigid nodes, the stress values are greater than those of the corresponding elements of the idealized truss with hinges in nodes, especially in truss elements next to bearings. To gain a more complete insight into the real state of stress in trusses, it is recommended to view the truss structure as a frame structure with rigid nodes, which is in agreement with its real behaviour.

Keywords

truss; analytical and experimental modelling; finite-element method; dimensional analysis

Hrčak ID:

96586

URI

https://hrcak.srce.hr/96586

Publication date:

5.2.2013.

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