FAQ 000340 IT

Modeling | Structure RF-FE-LTB

I have the following problem occurring in RF-/FF-LTB: To analyze the effect on the load application point, I have defined the eccentricity e-z one time positively and another time negatively. A positive value, which means a load application on the lower chord, should be a contribution to the stabilization of the structural system. But this is not the case. What do I have to do?

Risposta

The definition of the point of load application in RF-/FE-LTB depends on the local member axis system. For example, if you define a horizontal member (global Z-axis points downward), the z-axis of the local axis system points downward as well (in the positive Z-direction). Now, if you want the loading to act on the upper side, you have to enter a negative value for e-z. Moreover, for a horizontal member it doesn't matter in which direction the member orientation runs: The local axis z always points downward.

This is different for a vertical member. In this case, the member orientation runs from top to bottom, and the local axis z of the local axis system points to the negative direction X. Now, if a positive value is entered for the eccentricity e-z, this input corresponds to a load application on the upper chord and thus results in a higher utilization.

You can activate the graphical representation of the local axis systems for each member in the Display navigator by selecting the option "Model" > "Members" > "Member Axis Systems x,y,z".

Contattaci

Contattaci

Hai trovato la risposta alla tua domanda? In caso contrario, contattaci o inviaci la tua domanda utilizzando il modulo online.

+39 051 9525 443

info@dlubal.it

Primi passi

Primi passi

Offriamo suggerimenti e consigli utili per aiutarti a familiarizzare con i programmi principali RFEM e RSTAB.

Veramente la miglior assistenza tecnica

“Un sentito grazie per le utili informazioni.

Vorrei fare un complimento al vostro team di assistenza tecnica. Sono sempre sorpreso da come trovate le risposte alle mie domande velocemente e professionalmente. Nel settore dell'analisi strutturale, uso diversi software compresi di contratti di servizio, ma la vostra assistenza è di gran lunga la migliore.”