PRESTRESSED BEAMS with VARIABLE HEIGHT

Calculation Program for the design and check of prestressed pretensed beams with any symmetric section geometry and with VARIABLE heigh

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

The program verifies and checks iteratively prestressed beams of sections that are symmetrical respect to the vertical axis. The beams can have up to two taperings. The sections can be hollow.

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.

Partendo dall'appoggio sinistro è verificata la zona precompressa della trave in una serie di sezioni fino all’appoggio destro, di queste evidenzia la sezione più sollecitata a flessione.

This program can calculate DOUBLE SLOPE BEAMS, even with inferior slab, to calculate BOOMERANG beams, instead, see this program here.

capriate precompresse

 

 

FEATURES OF THE MODULE

  • Aggiornati alle nuove normative NTC del 17/01/2018
  • Travi di forma qualsiasi purchè simmetriche
  • Facilissimo da usare e velocissimo
  • Risultati completi, evidenziati e facilmente controllabili
  • Assistenza tecnica compresa
  • Travi PRE-TESE a trefoli scorrevoli aderenti

The program verifies and checks iteratively prestressed beams of sections that are symmetrical respect to the vertical axis, 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

Calculation of the half beam


Superior peak flat option

smusso


Asymmetric beams

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”

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.

 

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

Input of the form of the beam to simplify the beam management for the user
Parametric Autmatic sections
Handy navigation bar on left side

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

capriate precompresse input cassero

capriate precompresse

capriate precompresse

progetto staffe

The PREF program is a suite of modules for the calculation of prestressed beams of various gometry which is distributed on an annual subscription basis.

The subscription can be customized, choosing the modules of your interest, and includes the use of the programs, technical assistance and all the updates that will be released.

The programs have hardware protection with a USB dongle.

At the top right of this site, click LOGIN, log in with the credentials provided in the initial package (or request them from support - it is not possible to create new ones for this purpose).

Click Download-Updates from the menu, you'll see the list of available updates depending on your subscription: download the desired ones and install them.

It is possible to check which programs need an update by opening the Program Manager and clicking "Updates": the programs to be updated will be listed with a red dot and those that already have the latest version will have a green dot.

It is not necessary to download the libraries and other files that you find in the list, they are only for assistance cases.

To reactivate a subscription, simply send us an email request, specifying whether the programs to be included in the package are the same or if you want to change them, you will be sent a quote for the new subscription.  

The broken dongle is replaced for free.

Contact us to check if the dongle is actually broken and for all the details (usually a new dongle is sent and the broken dongle is collected by the courrier at delivery).

Log in to this site (top right) by cliccking LOGIN and entering using the given credential. Click Download-Updates menu.

Look for "Error 7 - Out of memory": the file to download with all the instructions "DLL FOR ERROR 7 - OUT OF MEMORY" is listed.

Instructions:

The downloaded file must be unpacked and the extracted dlls must be copied to

C:\WINDOWS\SYSTEM32

And in

C:\WINDOWS\SYSWOW64

The dlls may already be present, for safety it is strongly recommended to save a copy of the files on the PC before overwriting them.

Run the program (any program of the package). Select "Impostazioni", "Lingua" from the menu.

Select from the window the desired language:

Click "Salva".

The language is automatically updated for all open windows.
All windows, reports and the program warning messages will be in the chosen language.
MODIFICATION EFFECTS ALL PROGRAMS of EISEKO COMPUTERS.

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

NOTE: you can call the technical support Tel. +39.045.80.31.894 and we will do the installation from remote connection

Or follow the procedure:

If you have the CD:
• Insert the CD: There are multiple folders on the CD, depending on the PREF package modules you purchased.
• All the folders and subfolders contain the installation programs, they must all be installed by launching the Setup.exe file of each folder and subfolder. The order in which the installations are carried out does not matter.
NB. DURING INSTALLATION:
o If version conflict messages appear (if you want to leave the exixting file in the system) click "No to all"
o If dll registration error messages appear click "Ignore" (or "Ok")

• Launch the Program manager - There wil be the setting of the programs
• Launch again the Program manager and enter the registration code provided by the assistance (if you do not yet have the code, press "Later").
• Launch all the purchased programs one by one, they will ask you the Database, select the mdb / mde file from the folder "C:\Users\Public\Public Documents\Eiseko Database" (the name of the database is similar to the name of the program). This operation must be done only once.

If you DO NOT have the CD:
• At the top right of this site, click LOGIN and enter the credentials you've been given.
• Download the installers of the modules included in the package
• Unzip the related downloaded zip files into separate folders. For each, launch the Setup.exe and follow the installation wizard. The order in which the installations are carried out does not matter.
NB. DURING INSTALLATION:
o If version conflict messages appear (if you want to leave the file in the system) click "No to all"
o If dll registration error messages appear click "Ignore" (or "Ok")

• Launch the Program manager - There wil be the setting of the programs
• Launch again the Program manager and enter the registration code provided by the assistance (if you do not yet have the code, press "Later").
• Launch all the purchased programs one by one, they will ask you the Database, select the mdb / mde file from the folder "C:\Users\Public\Public Documents\Eiseko Database" (the name of the database is similar to the name of the program). This operation must be done only once.


You are now ready to use the program.

There are pros and cons in both cases, the choice is very personal, but we recommend working on files.

If you work with file, you can save the file wherever you want, on the local PC or on the network (for example in the job order folder). When you create a new file of the project with the calculation program, you will have to manually select the text file of the section (created with the Geometries module) from the folder in which it was saved in. If you work on files it is good habit to make a backup of the project txt files in order not to lose the work you've done.

If you work with database you have all the beams (created with the Geometries program) and the projects (created with the calculation program) saved in the same file, whose management is automatic by the program and you don't have to worry about where you save it (you can see name and path of the file in the "Information" menu). The list could become very long. Anyway, you can do all the operations of saving multiple databases, using databases on the network, changing databases.

If you are working with a  database you need to remember to make a backup of the mde / mdb files you used. The files must be saved in a folder on the PC where the user has all access privileges (modification and saving), we recommend C:\Users\Public\Public Documents\Eiseko Database (folder created by default with the installation of the program).

In the menu at the top right select "Data Input", "CompanyData"

Enter the desired data and press "Save".

In the menu at the top right select "Data input", "User data"

Enter the desired data and press "Save".

 

Yes, it is possible. It must be done BEFORE creating all the projects belonging to a specific job order.

From the main form, press “SETTINGS” and then “SET SEISMIC PARAMETERS”.
It will open then following window, in which it is possible to associate all the seismic data relating to the location of the selected job.

Each time a new project associated with the “Example” job is created, the program will automatically propose the data of the seismic parameters (they will obviously be modifiable).
NOTE: projects that already existed before these parameters are set will continue to use the previously saved data.

 

Tutti i “dati di default”, in gruppo, possono essere memorizzati in diversi “CRITERI”: ad es, se un ingegnere lavora per più ditte, può memorizzare i dati di default validi per le diverse ditte in più criteri ciascuno con il nome della ditta. Prima di creare il nuovo progetto scegliere il Criterio della ditta per cui si realizza il progetto di calcolo. L’uso dei “Criteri” si dimostra particolarmente utile per gli schemi di sollevamento e trasporto che possono variare da una ditta all’altra.

Yes, it is possible from version 21.00.00. If you have a previous version just update the program from this site and then you will be able to select "Verify Existing" in the materials window.

To learn more about the new features introduced in the new releases of all PREF programs, just go to the Updates and News page of the PREF, where the features included and the publication dates of all the major changes are specified in detail. If there are no details on a specific new version, these are minor bug fixes or improvements.

PREF Free Download

Please fill in the form below and we will send you an email with the link to download the FREE version of the software and all the instructions to the email address you entered.

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