The LBS users can utilize either the Design Mode or the Rating Mode . Therefore, the Rating Combinations are different from the Load Combinations and the Rating Loads can be dissimilar from the Design Loads . The user must initially select the Mode: Rating…

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…

The time dependency of specific material properties can be considered in the OpenBridge Designer analysis. In RM Bridge , these time dependencies are defined by variables for creep, shrinkage, and relaxation which are definitions prepared for each 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…

LBS inside OpenBridge Designer , allows users to easily create models with longitudinal stiffeners within a girder element with a variable height. After the usual geometry and modeling steps for creating the main girders in the Member Definition tab,…

There are multiple options to consider Cable Sagging in RM Bridge , the user choice should be related to the model needs according to the problem relevance, namely its size and complexity. Initially, the Elements Type Cable is used to have Normal tension…

RM Bridge has two options for Cable elements subdivision: Internal: Single (final) stage analysis can use the N-Div subdivision of cables. Useful for Preliminary design. To calculate single load cases the subdivision of N=5 to 8 should be sufficient…

RM Bridge , inside OpenBridge Designer, has three possible solutions for designing with cracked concrete in the tensile zone in composite structures with continuous steel girders and concrete reinforced slabs. The combination of both, Reload and No tens…

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…

In RM Bridge circular elements and radial elements edges, as well as circular construction lines and arched boundaries can be created in Modeler, giving great modeling flexibility. Initially, users should know that there are new types of construction…

In LEAP Bridge Concrete , for a flared bridge model with only one single span, the user has to follow some steps to adjust the Precast length : 1. Open the model and go to the Superstructure tab, select the Precast/Prestressed Girder button to open…

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…

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…

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…

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…

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…

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 > 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…

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 …

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…

RM > Modeler definition of slender parts in cross-section. Cross-Sections – Slender Parts: Required for the local buckling. Reference Set – Steel Slender part type Start point = free point Line point = restraint point Subtype of slender…

RM > Analyzer > UltRes schedule action for capacity design of composite steel bridges. Steel Design checks performed with: UltRes – design resistance ResChk – proof check (interaction formulas) Design of Composite Steel Bridge - Video