Rod (statics)
A rod is the simplest beam in a structure such as B. a truss or a frame . In contrast to a beam , a rod is very thin compared to its length. The member axis represents the gravity axis of a component. It can transfer normal forces, in three dimensions also torsion . A structure made of bars is calculated using the bar statics ; a structure made of beams according to the beam statics .
In addition to their length l, bars have, among other things, a tensile stiffness EA . These properties are sufficient to be expected. If the relationships between EA of the individual bars are known, the bar forces can be calculated using the linear theory of elasticity. Since materials generally behave in a plastic and viscous manner, the utilization of statically indeterminate systems also influences the load-bearing behavior, see e.g. B. Plastic hinge .
A bar can be loaded at any point.
A structure made of bars can be statically determined or statically indeterminate. There are two-dimensional and three-dimensional bar structures.
See also
literature
- Horst Werkle : Finite elements in structural engineering. 2nd Edition. Springer Fachmedien Wiesbaden, Wiesbaden 2001, ISBN 3-528-18882-0 .
- Konstantin Meskouris , Erwin Hake: Statics of the rod structures. Springer Verlag Berlin Heidelberg, Berlin Heidelberg 1999, ISBN 3-540-66136-0 .
- Wilhelm Schlink , Heinrich Dietz: Technical statics . A textbook for an introduction to technical thinking, Julius Springer Verlag, Berlin 1939.
- Hans Albert Richard, Manuela Sander: Technical mechanics, statics. 3. Edition. Vieweg + Teubner, Wiesbaden 2010, ISBN 978-3-8348-1036-6 .
- Karl-Eugen Kurrer : History of Structural Analysis. In Search of Balance , Ernst and Son, Berlin 2016, ISBN 978-3-433-03134-6 .
Web links
- Statics of building structures III (accessed on January 3, 2016)
- Structure of static calculations (accessed on January 3, 2016)
- Member statics (accessed on January 3, 2016)
- Structural models of the bar statics (accessed on January 3, 2016)