• PDF

    Study on the Sensitivity of Mesh Size and Properties in the Analysis of Semirigid Diaphragms

    This paper was prepared for and presented at the 2020 Structural Engineers Association of California Convention. It was also presented at the 21st Association of Structural Engineers of the Philippines International Convention. The behavior of a building…
    • Study on Sensitivity Semirigid Diaphragms.pdf
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  • RAM SS AISI 310-16 Diaphragm Stiffness

    Hello The Diaphragm shear stiffness formula has changed based on the AISI 310-16 and this results in a much higher shear stiffness. Following the procedure suggested by RAM Calculating Semirigid Diaphragm E'... this results in a E' value that is 3-4x…

  • RAM deck shear thickness

    Bentley/RAM's website recommends using the deck gage thickness as the deck's effective shear thickness. However, the deck's attachment design, lapping, etc have a large effect on the deck's effective shear thickness and can dramatically change the building…

  • RAM Structural System Diaphragms and Lateral Loading

    Currently my 3 story RAM structural system model is calculating loads differently for each story when the roof diaphragm is switched from pseudo flexible to semi rigid. Additionally, when the roof diaphragm is semi-rigid, the load is applied to the perimeter…

  • Lateral displacemente of semirigid diaphragm

    Hi, I'm trying to verify the drift of a one-story ware house with tilt-up concrete panels and steel deck roof. I followed all the information that I found on the forum, but I still have a few questions: First I calculated the properties and displacement…

  • Diaphragm properties for Laminated Lockwood wood deck

    Could anyone please guide me on the properties that I should input for semi-rigid diaphragm in RAM Structural system, in the decking properties for the Laminated Lockwood wood deck? Effective thickness (in) - ______ Poisson's Ratio - ___________ …

  • RAM SS - Roof with different Diaphragms

    Hello, I have a roof with a composite deck over half of the floor plan. The other half is just the metal deck. I have the model working for gravity and I do not get any errors when I run the lateral model, however I have a feeling that there is something…
  • PDF

    Modeling And Analysis of Diaphragms

    This pdf file contains the slides used in the webinar: Modeling and Analysis of Diaphragms.
    • ModelingAndAnalysisOfDiaphragms.pdf
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  • Modeling and Analysis of Diaphragms

    Bentley Success Factors Webinar: Modeling and Analysis of Diaphragms Webinar Q&A Webinar Date: October 2017 Webinar Description Building structure behavior in response to earthquake or wind is heavily dependent upon the nature, extent and stiffness…

  • RAM Frame - Diaphragm Constraints and Gravity Forces in Shear Walls

    Product(s): RAM Structural System Version(s): Any Environment: N/A Area: Analysis While shear walls are primarily a lateral force resisting system they also carry gravity loads including their self-weight…

  • Lateral Loads on Flexible/None Diaphragms Supported by Gravity Members Only

    Applies To Product: RAM Frame Analysis First Affected Version: Found in Version: 15.03.00 Fixed and Released in Version: 15.04.00 Area: Analysis Issue #: 642195 Problem…

  • RAM Meshing and Segmentation [TN]

    Product(s): RAM Frame, Ram Concrete Version(s): 13.00.00.00 or later Environment: N/A Area: Modeling Meshing and Segmentation in RAM Frame or Concrete General Lateral walls, 2-way decks and semi-rigid…

  • RE: Diaphragm Collector & Chord

    There is still no easy way to model and design collector beams or drag struts with RAM Frame. In order to model a drag strut taking axial load, the beam needs to be a lateral member supported by lateral frames (probably with pinned ends). But, even if…

  • Example Calculating Semirigid Diaphragm E'

    Product(s): RAM Structural System; Ram Frame Version(s): All (V8i; CONNECT Edition) Environment: N/A Area: Analysis See Also RAM Frame - Semirigid Diaphragms

  • RAM Frame - Criteria - Diaphragms

    Product(s): RAM Structural System; Ram Frame Version(s): All Area: Analysis What diaphragm types are available? The diaphragm options in RAM Frame include: Rigid, Flexible/None, Pseudo-Flexible, and Semirigid. Technical…

  • RAM Frame - Load Cases

    Product(s): RAM Structural System; Ram Frame Version(s): All (V8i; CONNECT Edition) Area: Analysis How do I specify lateral loads? There are two kinds of lateral loads possible in RAM Structural System. The most common…

  • RAM Frame Numbers

    Product(s): RAM SS; Ram Frame; Ram Modeler Version(s): All (V8i, CONNECT Edition) Environment: All Area: Analysis; Results; Graphics How can I assign Frame Numbers? Frame numbers can be assigned in either…

  • RAM Frame - Masses

    Product(s): RAM Structural System; RAM Frame Version(s): Any Environment: N/A Area: Analysis Original Author: Bentley Technical Support Group Why do I get a warning about mass that's not associated…

  • RAM Frame - Rigid Diaphragm Constraints and Frame Shear [TN]

    Product(s): RAM Structural System; Ram Frame; Ram Elements; STAAD.pro Version(s): Any Area: Analysis Wall stiffness, height and the effect of a diaphragm constraint When a structure consists of walls (or frames) of…

  • RAM Frame - Pseudo Flexible Diaphragms [FAQ]

    Product(s): RAM Structural System Version(s): Any Environment: N/A Area: Analysis Original Author: Bentley Technical Support Group What are pseudo-flexible diaphragms? Pseudo-flexible diaphragms…

  • RAM Frame - Semirigid Diaphragms FAQ

    Product(s): RAM Structural System Version(s): 13.00.00.00 or later Area: Analysis Original Author: Bentley Technical Support Group What properties are used with meshed semirigid diaphragms? Semirigid diaphragms…

  • RAMSS Two Way Decks [TN]

    Product(s): RAM Structural System; Ram Frame; Ram Concrete Version(s): 14.00.00.00 or later Area: Analysis Use of Two way decks in RAM Structural System The table below clarifies how One way and Two way decks can…

  • RAM Frame - Building and Frame Story Shear

    Applies To Product(s): RAM Structural System Version(s): Any Area: Analysis; Reports How is the Building and Frame story shear calculated? When the program calculates the shear at a particular level, it…
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