ram connection staad
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AD.2007-1001.5.1 RAM Connection Design Mode
Purpose
There is now a new mode in STAAD.Pro to dynamically link structural model data, including section
properties and analysis results, to the RAM Connection application to check connection designs for code
compliance. The resulting data and diagrams of the connection can also be included in the User Report.
Description
Connections are designed in the RAM Connection Mode by creating ‘Joints’, from the geometry, section
properties and forces resulting from the analysis and assigning a ‘Design Brief’ of connection templates
from which a suitable connection, where available, is reported.
The RAM Connection application operates using ‘Basic’ or ‘Smart’ connection templates.
A ‘Basic’ connection template contains all the information about the connection (such as the plate sizes
and bolt locations etc) which is applied to joint and then checked for code compliance. A Design Brief
that is to use Basic connections can contain multiple connections, i.e. each with a different plate size
and bolt diameter, if the first connection does not achieve compliance, then the next is selected until
either a suitable connection is defined or all the connections in the brief have been checked.
A ‘Smart’ connection template contains parametric rules defined in a macro which allows characteristics
of the connection to be modified (within limits) in order to achieve code compliance. A Design Brief
that is to use a Smart connection can only specify a single smart connection definition.
The definition of each connection template and the order in which they occur, are defined in a database
which can be displayed and/or modified from the Connection Design menu. See the RAM Connection
manual for more information on editing the connection database:-
STAAD.Pro 2007 Build 1001 Release Report
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Each folder contains a number of ‘templates’. The sequence of these templates determines the order that
will be used when performing a design.
A similar database of properties of Bolts and Welds exists which can be edited if required:-
Workflow
The following 6 stages outline the steps that should be taken in order to create and design a connection.
The workflow is essentially controlled from the Connection Definitions dialog on the right of the
Connection Page, displayed when entering the RAM Connection Mode:-
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1. Create Design Envelope
The list analysis load case results that are to be checked for compliance are collated in Design
Envelopes which can be defined here or selected if already defined in the STAAD file.
The Design envelope is defined by clicking on the [Create Envelope…] button on the Connection
Definitions dialog:-
2. Create Joints
A joint is defined by a number of analytical beam elements meeting at a node.
To create a joint, select a number the beams that meet at a node and click on the [Create Joint…]
button. If a valid joint can be created, then a dialog box is shown to specify the type of joint that
could be created with the given beam selection, similar to the following:-
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The range of Joint type and the number of beams that should be selected before clicking on the Create
Joint button is clicked is shown in the following table:-
Type (code)
Sample No. of selected beams required to form.
Beam-Column Flange Joints (BCF)
2 or 3
Beam-Column Web Joints(BCW)
2 or 3
Beam-Girder Joints(BG)
2 or3
Beam Splice Joints(BS)
2
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Column Splice Joints(CS)
2
Continuous Beam Over Column Joints (CC)Column Cap(CP)
2 or 3
Column-Beam Braces(CBB)
1 or 2 column1 or 2 beams1 to 4 bracesBraces must be defined with the TRUSS command
Cheveron Brace(CVR)Aka Beam-Braces
1 or 2 beams1 to 4 bracesBraces must be defined with the TRUSS command
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Once created, a joint is marked on the graphical window with a triangle symbol thus:-
The status of a joint is identified with a color code:-
Vertical X Brace(VXB)
4 bracesBraces must be defined with the TRUSS command
Color Example Meaning
Grey No Design Brief associated to the joint.
(see Assigning Design Briefs below)
Cyan A Design Brief has been applied, but no
design has yet been performed.
Yellow A design has been performed, but it is not
possible to find any template which does not
report a problem. The results of the last
template will be reported.
Green A design has been performed and a template
has been found which when applied there are
no reported problems.
Red The connection has been selected with the
joints cursor:-
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3. Create Design Briefs
The Design Brief contains the connection templates that are to be assigned to the joint in order, until a
suitable connection template is found.
To create a Design Brief, click on the [Create Brief…] button on the Connection Definitions dialog.
The dialog appears thus:-
Define the name and select the required design envelope from the drop-list.
A Design Brief can be used to provide a single connection that can used by all joints that have the
Design Brief assigned to them or by having the option ‘Design Connection Individually’ selected then
each joint could end up with a different template.
The design code that is to be used should be selected from the drop-list.
The connection template group that is required should be selected from the drop-list. The default list
of groups with an installation of STAAD.Pro include:-
Basic Connection Templates
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1 Basic BP BCF Bent plate, beam to column flange
2 Basic BP BCW Bent plate, beam to column web
3 Basic BP BG Bent plate, beam to beam
4 Basic DA BCF Bolted Double angle bolted beam to column flange
5 Basic DA BCW Bolted Double angle bolted beam to column web
6 Basic DA BG Bolted Double angle bolted beam to beam
7 Basic DA BCF Welded Double angle welded beam to column flange
8 Basic DA BCW Welded Double angle welded beam to column web
9 Basic DA BG Welded Double angle welded beam to beam
10 Basic EP BCF Bolted End plate bolted beam to column flange
11 Basic EP BCW Bolted End plate bolted beam to column web
12 Basic EP BG Bolted End plate bolted beam to beam
13 Basic EP BCF Welded End plate welded beam to column flange
14 Basic EP BCW Welded End plate welded beam to column web
15 Basic EP BG Welded End plate welded beam to beam
16 Basic SP BCF Shear plate beam to column flange
17 Basic SP BCW Shear plate beam to column web
18 Basic SP BG Shear plate beam to beam
19 Basic SSL BCF Bolted Stiffened seated angle bolted beam to column flange
20 Basic SSL BCW Bolted Stiffened seated angle bolted beam to column web
21 Basic SSP BCF Welded Stiffened seated plate bolted beam to column flange
22 Basic SSP BCW Welded Stiffened seated plate bolted beam to column web
23 Basic ST BCF Bolted Shear T bolted beam to column flange
24 Basic ST BCW Bolted Shear T bolted beam to column web
25 Basic ST BG Bolted Shear T bolted beam to beam
26 Basic ST BCF Welded Shear T welded beam to column flange
27 Basic ST BCW Welded Shear T welded beam to column web
28 Basic ST BG Welded Shear T welded beam to beam
29 Basic TP BCF Through plate beam to column flange
30 Basic TP BCW Through plate beam to column web
31 Basic US BCF Bolted Unstiffened seated angle bolted beam to column flange
32 Basic US BCW Bolted Unstiffened seated angle bolted beam to column web
33 Basic US BCF Welded Unstiffened seated angle welded beam to column flange
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SmartConnectionRange
Once a connection group is selected, all the available templates are displayed as available.
If the group is a Basic type then one or more templates can be moved to the Selected side by clicking
on the [>] or [>>] to move all templates to the selected side.
If the group is a Smart type, then only a single template should be moved to the selected side using
34 Basic US BCW Welded Unstiffened seated angle welded beam to column flange
35 Basic CP Bolted Column cap Plate bolted
37 Basic CS Bolted Column splice bolted
38 Basic CS Welded Column splice welded
39 Basic FP BCF Bolted Beam flange plate bolted beam to column flange
40 Basic FP BCW Bolted Beam flange plate bolted beam to column web
41 Basic FP BG Bolted Beam flange plate bolted beam to beam
42 Basic FP BCF Welded Beam flange plate welded beam to column flange
43 Basic FP BCW Welded Beam flange plate welded beam to column web
44 Basic FP BG Welded Beam flange plate welded beam to beam
45 Basic EEP BCF 4Bolts Extended end plate, beam to column flange, 4 bolts
46 Basic EEP BCF 8Bolts Extended end plate, beam to column flange, 8 bolts
47 Basic EEP BCW 4Bolts Extended end plate, beam to column web, 4 bolts
48 Basic MA Bolted Moment angle beam to column flange
49 Smart DA Double angle connections
50 Smart DA Beam splice Double angle beam splice connections
51 Smart EP Shear end plate connections
52 Smart SP Shear single plate connections
53 Smart SP Beam splice Shear single plate beam splice connections
54 Smart ST Shear T connections
55 Smart SS Stiffened seated connections
56 Smart US Unstiffened seated connections
57 Smart DW Directly welded moment connections
58 Smart FP Flange plate connections
59 Smart EEP Extended end plate connections
60 Smart MA Moment angle connections
61 Smart Gussets Gusset connections
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the [>] button.
Once the Design Brief is defined, it is saved by clicking on the [OK] button.
4. Assign Design Briefs to Joints to create Connections
The final stage in setting up the design is in assigning Design Briefs to Joints. The process is simple
and similar to that used elsewhere in STAAD.Pro. The Design Brief should be selected in the
Connection Definition dialog, the choice of assignment selected from the options at the base of the
dialog and then click on the [Assign] button.
Note that when a design Brief is selected the joints that have been assigned this brief are displayed in
the dialog above the Assign button. When changing to the option ‘Assign to Edit List’ this list can be
edited and is updated when clicking on the Assign button.
Note that STAAD.Pro will check that only suitable briefs are assigned to defined joints, e.g. it is not
possible to assign a Design Brief of templates ‘Basic BP BG (Bent Plate Beam Girder) to a joint that
has been defined as type ‘Beam Column Flange (BCF)’
5. Design Connection
To perform the connection design, select the required design option from the Connection Design
menu:-
All connections with associated briefs will be designed and their status reported in a Connection
Design dialog:-
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During the design process, an [Abort] button is provided to allow the design process to be cancelled.
Upon completion, this becomes a [Done] button which must be clicked to complete the design.
6. View connection details
The connection design results can be viewed on an individual joint, by double clicking on the symbol
with the joint selection cursor. The information is displayed in the RAM Connection design window
thus:-
If a design has not yet been performed (i.e. the joint is color coded cyan), then one will be performed
and the resulting connection displayed. Note that the status of the connection is reflected in the color
code of the icon in the top right corner:-
Status RAM Connection Joint color code
Connection DOES pass
all design checks
Connection DOES NOT
pass all design checks
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A preview of the DXF drawing of the connection can be displayed clicking on toolbar icon:-
This DXF image will be available in STAAD.Pro.
Additionally, both the input data and results can be displayed and printed directly here by clicking on
the relevant icon:-
7. Drawing and Results
A full list of the defined connections, templates used, capacity ratio and overall status is displayed in
the Drawing & Results page.
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Any connection that has been designed, not matter if it’s ratio has exceeded unity or has failed for
some other reason, by clicking on the joint name, the DXF diagram of the connection and the design
results for the current template are displayed thus:-
8. Add to report
The connection details and the diagrams can be included in a User Report along with other
STAAD.Pro information.
a. Results
To add the connection results, click on the menu item, File > Report Setup to open the report
setup dialog. On the ‘Items’ sheet select the ‘RAM Connection Report’ from the ‘Available’
drop-list. All connections with results are displayed and those that are required in the Report
should be moved to the ‘Selected’ side.
b. Diagrams
If a diagram of the connection is required, take a photo as with any other graphic and it can be
included as any other picture.
Pages
The RAM Connection mode operates with two pages:-
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Menus
When entering the RAM Connection Mode, the menu structure changes to the following:-
File
Edit
View
Tools
Select
Connection Design
Mode
Window
Help
All menus apart from the Connection Design menu are available in other modes; however, there is an
enhancement to the Select menu.
The Connection menu contains the following options:-
In the RAM Connection mode, the Select menu is enhanced with two additional items:-
Design All Connections All defined connections (i.e.
Joints with defined Briefs) are
designed according to the
setting s of their associated
brief.
Design Selected
Connections
Only connections selected with
the joint cursor are designed.
Configure Connection
Database…
Launch the Connections
database
Configure Bolt & Weld
Database…
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