Main Screen Model & Diagrams
In RM Bridge one of the fastest ways to check results and display the model is directly at the Main Screen. It's easy and fast because any additions or necessary modifications can be made directly at the screen menus.
Tips & Tricks:
Right-button…
Primary Creep
I am looking for RM to print primary Creep. Rm is giving me secondary creep but I want primary creep as well. When I click on results, my primary creep has no output. Can someone kindly help?
Recalculate Window Basic Settings Non-linear Material
In RM Bridge , inside OpenBridge Designer , the user can select the Non-linear Material option at the Non-linear Analysis options inside the Basic Settings Tab of the Analyzer Recalc Window for the consideration of the non-linearities in the modeled structure…
non-linear material analysis in RM Bridge
Hi all.
How is non-linear material analysis n RM Bridge understood? Best regards.
[RM Bridge] stiffness Traveller of Main Girder
hi all, I have a few questions as follows:
1. During the construction of cable-stayed bridges, does the Traveler of Main Girder stiffness model
always have to be considered for cable-stayed bridges to increase the stiffness of Kn girders?
2. If…
the effect of cable sag
Hi all.
How does RM Bridge consider the effect of cable sag?
Best regards.
allowable displacement of towers under live load
Hi all.
In the design of a cable-stayed bridge, what is the allowable displacement of the A and H shaped towers under live load? Best regards.
allowable deflection of a suspension bridge
Hi all.
Can you tell me what the allowable deflection of a suspension bridge is? And what standard is this deflection limit based on?
best regards.
short-term and long-term composite cross-section
Hi all.
In composite steel girder bridges with concrete decks (continuous span bridges), does RM bridge automatically Calculator
effective width of deck to calculate short-term and long-term composite cross-sections?
best regards.
Steel composite bridge
Hi all.
I hava some question about steel composite brige as follows:
1. To calculator stress point of section, Rm Bridge automatic use short-term section for live load and load case type Non-permanent and use long-term section for load case type Permanent…
upward deflection of the continuous bridge structure
Hi all.
In continuous beam structures, the allowable downward deflection of the bridge under HL93 load is L/800.
So may I ask what is the upward deflection of the continuous bridge structure under HL93 load?
best regards.
Use No tens and ReloadSup functions in RM Bridge
Hi all. in steel girder bridges combined with concrete decks (continuous span girder bridges). If the concrete deck is not in tension and the combination of internal forces according to the Service limit state is service.sup, then use the ReloadSup function…
Modeler: Boundaries
Boundaries are any border around elements of a cross-section, internal or external to the CS.
The Boundary constraints are defined by a set of connected boundary line segments and the options are shown in the image below.
More information about…
Flutter
Flutter aerodynamic instability is nowadays a well-known phenomenon; although, it still requires quite complex wind engineering knowledge and techniques to be analyzed.
For Torsional Flutter the Critical velocity derivates from a Single degree of…
LARS | LEAP | OpenBridge | OpenTunnel | RM
This is the Main Page of a series of Wiki articles on the Be Communities page for OpenBridge and OpenTunnel engineering software solutions from Bentley Systems Inc .
OBD - OpenBridge Designer OTD - OpenTunnel Designer
OpenBridge Designer includes…
DSC - Double Sum Combination
For DSC , the Double Sum Combination we have an interaction between the different modes. The interaction is defined by the so-called correlation matrix [ ρ g ] which now has also off-diagonal terms.
R tot = √ ΣΣ R i T ρ g Ri , for j=1 to n, and for…
ABS - Absolute values
For the ABS rule we have basically to make a summation of the absolute values, so the formula is simply:
Rtot = Σ|Ri|
When considering it together with the RM superposition method , to get corresponding values, we also have to check the sign of the…
RM Bridge Analyzer: Extras: Loading and Stages: Response Spectra
Inside OpenBridge Designer , at the Extras Menu, in RM Bridge Analyzer , the users will find useful special functions for Loading and Stages definitions including the additional macro for easily generating the extensive input sequence template for standardized…
RM Bridge Analyzer: Extras: Loading and Stages
Inside OpenBridge Designer , at the Extras Menu, in RM Bridge Analyzer , the users will find useful special functions for Loading and Stages definitions. These are additional macros for easily generating extensive input sequences or templates for standardized…
RM Bridge Main Screen View Options
RM Bridge main screen inside OpenBridge Designer has many View Options to present the model to the user. This menu provides functions for controlling the graphical presentation of the structure in the graphic window of the GUI. As shown in the screenshot…
Rating of Composite Steel Bridge
RM > Analyzer > RateF schedule action evaluates the load rating factor for the bridge structure according to AASHTO code.
Parameters necessary to be introduced are:
Dead load: FactSWSUM.sup
Live Load Sup: FactTraffic.sup
Capacity: Steel PrimLC…
OBM / RM Bridge
1. OBM > Utilities > Send to RM Bridge
2. Select Standard Code and Material List
3. General Settings
4. Superstructure – Deck
5. Substructure – Cap , Piers and Piles
6. Substructure - Restraint Conditions
7. Assign RM Materials
…
OBD / RM Rating of Composite Steel Bridge
Is presented below the Rating Factor calculation done in OBD / RM Bridge for a two spans composite steel bridge with a central pier.
Bridge Modelling done in OBM and calculation performed in RM on a complete model in OBD.
Table of Contents:
A…