Software

Calculation and Drawing Program for the design and check of prestressed beams like INVERTED T, STRAIGHT T, L, I RECTANGULAR AND PREDALLE

Calculation according to Eurocode 2 UNI EN 1992-1-1 version 2005 and Italian NTC 17-01-2018.

The program verifies and checks iteratively this prestressed beams and automatically generate the Workingshop drawings with bill of materials, following ISO specifics.

Some beams can have holes or larger ends.

Crane loads: automatic input of the forces due to cranes (up to 4). The program calculates automatically moments and shares after the needed checks.

Beams are simply supported and they can have Overhangs at the ends. User can add CAST IN PLACE, to support loads, even with complex shape. The program will homogenize the cast in place to the beam, taking into account the different strengths of the concrete.

User friendly graphic input of the parametric sections.

travi precompresse

 

FEATURES OF THE MODULE

  • Possibility to save Default Sections
  • Workingshop drawings with bill of materials
  • Check of max capacity of strands pulling track
  • Parametric Rebars and stirrups
  • Embeds
  • Database of lifting hooks
  • Automatic input of the forces due to cranes

The program verifies and checks iteratively prestressed beams like INVERTED T, STRAIGHT T, L, I RECTANGULAR AND PREDALLE, according to Eurocode 2 UNI EN 1992-1-1 : 2005 and Italian NTC2018.

Constantly updated to the newest Regulations

The verification is made in a serie of sections with constant step along the whole beam lenght + the first prestressed section + the most stressed section for bending + the last prestressed section.

The program will also verify the transitional phases: the draft, lifting, lifting / transport after a storage period

The losses of tension are calculated in the centre of gravity of the strands contained in the lower 2/3 of the beam. The calculation at limit states is executed in an exact manner based on diagrams of breakage of the strands supplied by the manufacturer of the strands.

In each section the programs checks main traction and compression sigmas on the centre of gravity and shows the minimum distance where the stirrups should be placed.  Superior and inferior reinforcement is always calculated, to absorb the tractions as requested from Regulations.

There is the possibility to calculate any section chosen from the user, with the control of main tau and sigma of traction on the whole height of the section.

Shear Verification in the not-prestressed section on support, following the method “variable strut inclination method”

Crane: automatic input of the forces due to cranes (up to 4). The program calculates automatically moments and shares after the needed checks

CARICHI CARROPONTE AUTOMATICI

Display of Constraint reactions Rare and Ultimate left and right (also shown in the calculation report).

USE DIAGRAMS research of the span-capacities diagram, given a certain reinforcement

Verification of overhang support
Verification in partial prestress

SEISMIC VERIFICATION

Verification of GERBER SUPPORT

FIRE VERIFICATION

SNOW-WIND LOADS for each Italian location for any load situation.

The program automatically generates the workingshop drawings with the bill of materials, according to the results of the checks. The drawings are not available for Predalle nor for T beams.

disegno per la produzione per trave in cap

Stirrups and rebars are the minimum needed calculated from the results of the calculations.

The workingshop drawings can be directly printed or exported in dxf or pdf.

In the program there are a lot of parametric stirrups tipologies available for the user. Rebars are parametric too and can be customized.

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There is a dozen of lifting hook that user can customize.

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Any other stirrup of rebar not resent in the database can be added.

User can also add embeds, thas will be drawn and added in the bill table.

AUTOMATIC PROJECT OF THE NEEDED STRANDS The program designs the minimum needed strands FOR BREACKING VERIFICATION

AUTOMATIC PROJECT OF THE NEEDED REBARS AND STIRRUPS FOR SHEAR AND TORSION

Parametric Autmatic sections
Automatic calculation of all the geometrical characteristics

The beam can have CAST IN PLACE and POINT LOADS. User can input piece of rebars in any point of the beams

Editing of a database of the most used roof elements for the automatic calculation of G1, so that the user doesn’t need to look through weight tables each time

Input of loads on beam using  m2 or m, user choice

Reports and tables can be exported as: DOC, RTF, PDF, HTML
Fast check or results with highlight of eventual values over the limits of the Rules, any values NOT verified are indicated in red, while the values shown in blue are the values within the limits
Graph of the minimal needed area of stirrups along the whole beam
Easy and graphic management of strands, rebars and sheaths.

Handy starting menu
Settings of defaults data can fasten the inputs of the most used configurations of beams
For users that works for more companies, it is possible to save all the default data and the parameters depending on the Company in "Criterions", so that it is easier and fast to switch from a job to another without worring about all settings. For example., it is possible to save any number of lifting ans transportation schemas.
It is possible to switch from one section to another for the verification in a few seconds and immediately see if it is satisfied or not.

SCHEME OF THE BEAM: in every moment current section, cast in place if present, rebars, pre+post tensed strands and calculation results are displayed to always keep the situation under control.

FREE ADD-INS FOR ALL PROGRAMS engineers can easily and quickly make daily calculations

  • CALCULATION OF THE REBARS AREAS (for one or more rebars, to add them and to calculate the rebar area/m)
  • TABLE OF REBAR AREAS
  • TABLE OF STRAND AREAS
  • UNIT OF MEASURE CONVERSION
  • SEISMIC PARAMETERS
  • SNOW-WIND LOADS for each Italian location for any load situation.

SO FAST IT CAN BE USED ALSO IN THE QUOTING STEP
Lots of enhancements are made according to customer request
Available Languages : Italian, English, Spanish

Il programma PREF è una suite di moduli per il calcolo delle travi precompresse che viene distribuita in abbonamento annuale. L'abbonamento può essere personalizzato e include l'uso dei programmi, l'assistenza tecnica e tutti gli aggiornamenti che verranno prodotti.

I programmi hanno protezione hardware USB.

In alto a destra in questo sito, cliccare su LOGIN, accedere con le credenziali fornite (oppure richiederle all'assistenza - non è possibile crearle), andare nel menù Download-Aggiornamenti.

Appare l'elenco degli aggiornamenti disponibili.

Non è necessario scaricare le librerie, gli aggiornamenti le includono, servono solo per casi di assitenza.

The broken dongle is replaced. Contact us to organize the return and for all the details (usually a new dongle is sent and the broken dongle is collected by the courrier at delivery).

Effettuare il login in questo sito. Andare nell'area Download-Aggiornamenti. Cercare errore 7-Memoria esaurita e viene visualizzato il file da scaricare con tutte le istruzioni.

Nella finestra SETTAGGI della finestra iniziale si può impostare il tiro del banco trefoli.

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE

Qua premere MODIFICA

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

Qua selezionare la scheda IMPOSTAZIONI TIRO

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

Quindi premere il pulsante arancione  SETTAGGI DEFAULT

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

Il programma RTL dà un messaggio di errore se il tiro trefoli complessivo supera i limiti imposti in “Impostazioni Tiro”.
Se si hanno a disposizione i valori del prefabbricatore si possono impostare quelli, la quota di riferimento Q.R. è spiegata, basta premere il pulsante "Vedi immagine", in alto a destra, e si ottiene questa finestra descrittiva.

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

I prefabbricatori hanno il progetto delle testate di tiro dei loro banchi di casseri.
Le testate sono delle strutture vere e proprie in calcestruzzo od acciaio a cui vanno appoggiati i martinetti durante la tesatura e a cui vanno fissati i trefoli prima di effettuare il getto delle travi nei casseri. Le testate devono reggere il tiro complessivo fino all’atto del taglio o del rilascio dei trefoli.
Il progettista delle testate le ha dimensionate in funzione di un tiro massimo dei trefoli variabile in altezza riferito ad una quota che stabilisce lui, che in genere è il piede dei contrafforti.

Si riporta uno schema indicativo.

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

Se non si hanno i valori del prefabbricatore si possono impostare dei valori a caso sufficientemente alti, per esempio Dist. Da Q.R. = 200 cm e Tiro = 1000 ton.

Si procede con: Elimina tutto, si impostano i valori e poi si procede con Aggiungi, Elimina Riga.

Si riporta un  esempio

TRAVI RTL CALCOLO TRAVI PRECOMPRESSE - impostazione del tiro massimo per il banco di tiro

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