T 14 – MasterBeam Simple Steel Beam Design ... - MasterSeries

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MasterBeam Steel Beam Designer Tutorial

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T 14 – MasterBeam Simple Steel Beam Design Tutorial
Demonstrating the use of MasterBeam Steel Beam
Designer

T14.1.Introduction
This tutorial provides an introduction on the use of MasterBeam Steel Beam Designer
through the generation, analysis and design of a one span simply supported steel
beam.
In general, the basic steps involved in this tutorial are as follows:
 Define the member span, properties and loading
 Define supports conditions
 Analyse the frame
 Design the steel beam
 Print the design results
 View and print analysis results

In this tutorial, you will create, analyse and design a simple steel beam.
Note: There is a video of this tutorial. If it is not on you system please download it from
www.masterseries.co.uk
> User Login > Video Downloads > Tutorials > Tutor 14 ….

MasterBeam Steel Beam Designer Tutorial

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T14.2.Loading MasterFrame

To start this tutorial:
Select Start > All
Programs >
MasterSeries 2009 >
MasterSeries 2009.
Select Designer Suite
from the top menu and
then ‘MasterBeam :
Steel Beam Designer’
from the drop down
menu.

If you are using the free
version you will see this
Evaluation/Demo version
screen.
 Click on the Start Now
icon to open
MasterSeries in
evaluation mode.
 Select Designer Suite
from the top menu and
then ‘MasterBeam :
Steel Beam Designer’
from the drop down
menu.
T14.3.The File Selection Menu
The MasterBeam Steel Design File Selection menu will now be displayed.
This menu enables you to load existing files or create new data files. As each existing
file is selected, a picture of the frame is displayed in the window to assist your
selection.

MasterBeam Steel Beam Designer Tutorial

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Select the New File
button to clear and set the focus to the file
name input box.
Type “Tut single span” or other relevant filename.
The Get File button has changed to Create New.
Select Create New
button
.
File Selection Menu
Start a new file
Load the selected file or
s
tart a new file if a new
n
ame is given
Delete selected file
F
ile Management Options:
Create and remove
directories
Erase Selected Files
Copy, Back and Get data
files
Compress MasterSeries
files for email
Project Title for selected file
MasterBeam Steel Beam Designer Tutorial

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T14.4.Changing the Beam Span and Section Size
To have access to the free single beam design, Spans 2 & 3 need to be removed.
Click into the L(m) cell on the Span 2 line and delete the span length.
This should remove spans 2 & 3 from the sub-frame. Shortly we will see how to
remove the sub-frame columns and make the beam simply supported. The sub-
frame option is there to use should you wish to.
Click into the L(m) cell on the Span 1 line and change the span length to 4.5.
Move to the Section and Grade cell and click on the grey button at the right
hand end of the cell.
This will bring up the Steel Sections database from which you can pick a section
type, size and grade.
Drop the list of UB sections and select a 305x165UB 40.Click on the Close button
to confirm selection of this section size.
MasterBeam Steel Beam Designer Tutorial

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T14.5.Basic Loading
A basic dead and live UDL can be added to the beam.
Overwrite the Dead UDL as 16 and the Live UDL as 20 (kN/m).
Tick the Add selfweight box to have the beam weight added to the dead udl.
MasterBeam Steel Beam Designer Tutorial

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T14.6.Removing Sub-Frame Columns and changing End Supports
 Move to the Support (Columns) tab at the bottom left of the screen.
Initially the beam is part of a sub-frame with columns
above and below.
If you wish to consider a sub-frame analysis, the column
heights and section sizes can be altered to suit your
situation. The beam can then be designed.
In our tutorial we will consider a simply supported beam
which is not part of a sub-frame arrangement.

 Remove the tick from the Add Upper Columns box.
 Delete the dimension in the Below (m) cell to
remove the lower columns.
 Change the Type (P/F) from F (Fixed) to P
(Pinned) to make the ends pinned.
MasterBeam Steel Beam Designer Tutorial

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T14.7.Repositioning and Rescaling Graphics

The beam loading,
bending moment and
shear force diagrams can
be moved vertically up or
down the screen to
improve the graphical
layout.
The loading and diagram
scales can also be altered
to suit.
Tip – what you see on
screen is what is printed,
so the clearer the diagram
layout and scales are, the
better the graphics layout
will be when printed.
 Try manipulating the
positions and scales of
the diagrams using the
up and down arrows.
The lower line of the toolbar, above the
graphics area, gives further options to use
on the graphics.
 Try using these options to see the
different effects on the diagrams.
Tip – hovering the mouse over a button will display a tooltip giving an indication of its
use.

T14.8.Applying Point, Partially Distributed and Variable Loads
a) Additional loading can be easily added to the beam. First add 2 dead point loads.
 Click on the PY’s and PDLY’s tab to access the point loads area.
 Enter 2 point loads as Span
No. 1,Dead Loads of 20 kN
and 14 kN at X distances of
2.1m and 3.6m respectively.
MasterBeam Steel Beam Designer Tutorial

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These are unfactored loads. The
distances are all measured from
the start of the beam.
b) Now add a partial UDL of dead and live load.
 Enter in Span No. 1,Dead Load of 10 kN/m and Live Load of 5 kN/m at start
distance X1 of 1.0m and end distance X2 of 2.0m.
c) Finally add a varying distributed dead load.
 Click on the Varying Loads tab to access the loads area.
 Enter in Span No. 1,at a start distance X1 of 3.6m, a Dead
Load of 12 kN/m and Live Load of 0 kN/m and at end
distance X2 of 4.3m, a Dead Load of 20 kN/m and Live
Load of 0 kN/m.
d) Moving or Rolling Loads.
These various loads can be moved across the beam either individually or as a group
using the <= & => arrows before or after the load type.
 Click on the forward arrow => after PTRY1 and the variable load will move along
the beam. Click on the backward arrow <= to move it back again.
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 Click on the PY’s and PDLY’s tab.
 Under the Point Loads click on the forward and backward arrows <= ALL => to
make both loads roll simultaneously along the beam.
Since the analysis is carried out instantaneously, you will see the bending moment,
shear and deflection diagrams change as the loads move.
T14.9.Graphics, Data and Analysis Output options
Click on the Output tab.
The Graphics, Data and
Analysis Output areas allow
you to choose the number
of diagrams and their size,
the selection of input data
and the preferred analysis
output to be printed.
After the steel design has been completed we will come back to this area and print
out the final results.

Click on the Draw Four Diagrams icon to add the deflection diagram to the 3
existing diagrams. Rescale and reposition the diagrams as before, if necessary.
MasterBeam Steel Beam Designer Tutorial

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T14.10.Taking a Look at Loading Cases and Load Groups
MasterBeam does not analyse for the loads that you apply to the structure but rather
analyses for loading cases. If you have 10 different loads applied to a simple beam
but have no loading cases then no forces/deflections/reactions will be present in the
analysis results. A Load Case is a combination of the individual load groups. Each
load on the structure is assigned to a load group.
A load group is a group of loads that are always applied together with the same load
factor. The loads may be of different types and have different values. In this example
a UDLY load, a PY load, a PDLY load and a variable load were assigned to the Dead
(D1) load group. Similarly, a UDLY and a PDLY were assigned to the Live (L1) load
group.

Loading Cases
Select the All Loading Cases droplist from the lower line of the toolbar.
By default there are already three loading cases and case titles generated.
Loading Case 1: All Spans Loaded (Ultimate: 1.4D1 + 1.6L1)
Loading Case 2: Live Only (Serviceability)
Loading Case 3: All Spans Loaded (Serviceability: 1.0D1 + 1.0L1)

As you move from one loadcase to the next the loading diagram will change to reflect
the loads being considered in that particular loadcase.

Load Groups
Select the All Groups droplist from the lower line of the toolbar.
The following Loading Groups are included.
Load Group D1: Dead Load
Load Group L1: Live Load

Again as you move from one load group to the next the loading diagram will change
to display the loads in the selected group.

Analysis
The beam is being continually analysed and saved with each change in the data.
MasterBeam Steel Beam Designer Tutorial

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T14.11.Designing the Steel Beam
We shall now enter MasterKey Steel Sections Design to carry out the integrated
design of the simply supported beam.

From the Design drop menu
select Steel Design
In the case of a single member simply supported beam the program automatically
applied a Beam and Beam Portion design check to the member. The results from
this check are displayed in the main design output window.
The steel design
calculations appear
showing the bending
moment diagram along
with the capacity of the
current steel section.
There is also a table of
forces for the beam.
Scroll down through
the calculations to
see the full extent of
the output.
The blue background
indicates graphically
that the design is
failing. The figures in
the ‘unity ratio’ bar
show that the applied
moment divided by the
moment capacity
MA/Mc is failing at a
ratio of 1.199 and the
deflection by 1.321.
The tabs at the bottom of the screen contain the information being used for the
design check. The ‘Section AutoDesign’ tab shows the section size and the loading
case that is being used for the design. The program automatically detects the design
cases and the serviceability cases. With the AutoCase button ON
(pressed down)
the program will automatically select the most critical design and deflection cases,
which is very useful when there are a larger number of loading cases.
MasterBeam Steel Beam Designer Tutorial

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 You can enter a Brief Title for the design brief if desired
In the Beam and Beam Portion tab you may change fundamental design
assumptions such as the effective length, deflection limit etc. In most instances the
default values are appropriate. We will look at this tab shortly.
Tip:If you are unsure what the input parameter means simply hover your cursor over
the input box and a more detail description will appear in a tool tip.

AutoSize
Click on the Auto size button
in the bottom left of the screen and the program
will automatically size the section, progressively increasing the size until it works.
Effective Lengths
 Click on the Beam and Beam-Portion tab.
So far the beam has been considered as fully restrained along its length and a
305x165x54UB works. We’ll now assume that the beam is unrestrained.
 Drop the list of effective lengths and choose 1.00 L.
 Scroll down through the calcs.
The 305x165x54UB now fails in buckling
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The beam and beam-portion tab contains other variables applicable to the beam
design, for example, the ‘Def Limit’ gives the deflection limit – in this case L/360.
These additional features are not specifically considered in this tutorial.

Lateral Restraints
We will now consider placing a restraint at the midpoint of the beam and then check
the portion to each side of this restraint to see if they will pass the design check.
 Click on the Lateral Restraints tab.
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 Enter a restraint position of 2.25m for Portion 1.
The calc is now checking only the left half of the beam to the 2.25m position,
assuming a lateral restraint at that point, and the section size is now passing.
 Click on the right side of the bending moment diagram in the calcs and the
check will switch to that side, from the 2.25m midpoint to the right hand end of the
beam.
This should have similar unity factors as the left side – the loading is not quite
symmetrical.

Tip – by placing a value in the Portion 1 cell only, this spacing will be assumed to be
the restraint spacing along the full length of the beam. If the restraints are not
uniformly spaced, you can enter different dimensions in Portion 1, Portion 2, etc to
represent the positions of the restraints.
If the beam was still failing, you would select the ‘Section AutoDesign’ tab and click
on the ‘AutoSize’ button to resize the beam, based on the restraint positions entered
above.

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T14.12.Printing the Design Calculations
From the Print drop menu select Print Current Screen Only

The calculations as seen on
screen will be selected to be
printed. The ‘Job
References’ form now
appears.

The Job Reference form text boxes enable you to finalise or edit the job details that
will appear in your printout just before printing them.

You can change the printer from the
droplist of printers, and alter the page
orientation from portrait to landscape
Select the Printer button
to print
the calcs.

The printed design output appears in exactly the same format as shown on the
screen.

Further design calcs can be printed as required.

T14.13.Printing the Text, Graphical and Tabular Output
 From File select to Exit MasterKey
Sections.
This takes you back to the editing screen
and the graphical output of the analysis.
 Select the Output tab at the bottom of the screen.
This will allow you to select which parts of the graphics, input data and tabular
analysis output you wish to print.
 You can preview the data to be printed by selecting the Preview button
.
Accept the default selections or alter them if you wish.
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 From the Print menu select to Print All.
Select the Printer button.
The printed output will be a copy of that seen
on screen.
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Typical steel design output:-

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Typical graphical and tabular output:-

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This completes the analysis and design of a simply supported steel beam with
various load types and under different restraint conditions.