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  • Ram Elements P-delta Analysis Results

    I am attempting to run a p-detla analysis on a single story solar carport system in RAM Elements. I have checked the corresponding box in the Analysis dialogue, and though the analysis runs fine and I don't get any errors, I am unable to find evidence…
  • SIG Tech Talk: Stability Analysis and Design of Steel Structures using STAAD.Pro CONNECT Edition

    Tech Talk: Stability Analysis and Design of Steel Structures Presenter: Biswatosh Purkayastha, Senior Structural Engineer, Bentley Systems Surojit Ghosh, Senior Structural Engineer, Bentley Systems Date/Time: Part 1 - 20th May, 11:30 AM GST Part 2 - 3rd…
  • Unstable Structure Detected

    Hello, When running my model, the message below appeared on my screen. It warned me that an instability was found at a rigid diaphragm defined in my model for RZ. It told me to check the elements attached to this diaphragm or check PDelta Effects…
  • STAAD,P-Delta analysis, Number of iteration, Converge, Relative Displacement, Support Reaction.

    PDelta(large)_1(Converge).std PDelta(large)_1(Iteration).std Hello, Firstly, thanks to all of you reading this. I tried to understand what they(number of iteration, converge) do of P-delta analysis. As per the help of STAAD(C:\Program Files…
  • RE: Second order theory with imperfections

    The following changes were made to the file Value of E changed from 2.05e+008 KN/m2 to 2.1e+008 to match with example FIXED BUT supports were taken out as the model is defined as a PLANE frame anyway and so there cannot be any out of plane deformations…
  • RE: P-Delta of a single column

    Yes STAAD.Pro would be able to analyze the column. It does NOT need to be part of a frame. Pdelta effects only come into the picture when you have vertical loads and lateral loads acting simultaneously. So you may add a very small disturbing force in…
  • RE: How can I apply Pdelta analysis for earthquake and wind load seperatley, also why is the small delta command used after performa pdelta text?

    An sample model with seismic and wind loading and PDELTA ANALYSIS is attached. The SMALLDELTA at the end of the PDELTA ANALYSIS command instructs the software to include the small pdelta effect. However even if you DO NOT add the SMALLDELTA part, the…
  • Section force calculations in models with PDELTA ANALYSIS and tension/compression is incorrect

    Applies To Product: STAAD.Pro First Affected Version: 20.07.00.01 Found in Version: 20.07.11.50 Released in Version: 20.07.11.70 Environment: All Area: Analysis Subarea…
  • Analyzing & designing a structure made of steel and concrete

    Applies To Product(s): STAAD.Pro Version(s): ALL Environment: ALL Area: Analysis Subarea: Original Author: Sye Chakraborty, Bentley Technical Support Group …
  • RE: Can anyone provide design file of structure(staad input) with load combinations considering p-delta analysis

    You are correct. Pdelta effect is computed for primary cases only. So you need to combine different primary loads with appropriate combination factors using REPEAT LOADs instead of using LOAD COMBINATIONs to get the proper pdelta effect for these combos…
  • STAAD.Pro Analysis Solutions

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: STAAD.Pro Support Solutions Subarea: N/A Original Author: Bentley Technical Support Group …
  • How does STAAD. Pro check for convergence in a Pdelta Analysis

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: Analysis Solutions Subarea: PDelta Analysis Original Author: Bentley Technical Support Group…
  • What is the difference between a Pdelta and a Nonlinear Analysis

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: Analysis Solutions Subarea: Pdelta Analysis Original Author: Sye Chakraborty, Bentley Technical…
  • Load Case Convergence Error

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: Analysis Solutions Subarea: PDelta Analysis Original Author: Bentley Technical Support Group…
  • PDelta Convergence Error

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: Analysis Solutions Subarea: PDelta Analysis Original Author: Bentley Technical Support Group…
  • PDELTA ANALYSIS is the appropriate way to account for slenderness effects during column design

    Applies To Product(s): STAAD.Pro Version(s): All Environment: N/A Area: Analysis Solutions Subarea: Pdelta Analysis Original Author: Bentley Technical Support Group…
  • MOMENT BALANCE DOES NOT CONSIDER SECONDARY EFFECTS OF P-DELTA OR DIRECT ANALYSIS

    Applies To Product(s): STAAD.Pro Version(s): ALL Environment: ALL Area: Analysis Solutions Subarea: Pdelta / Direct Analysis Original Author: Sye Chakraborty, Bentley…
  • RE: P DELTA ANALYSIS

    The answer to the query is posted at http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/27979.how-does-staad-pro-check-for-convergence-in-a-pdelta-analysis
  • P delta analysis , Pdelta kg effect

    hi, I have two questions.. 1. While running PDELTA analysis in STAAD, how to include the effects of a service level dead load e.g. DL+ 0.25LL, before starting the PDELTA analysis for my repeat load combinations.. load case 1 DL load case 2 LL…
  • PDELTA Analysis ACI 318 Section 10.10

    Regarding PDELTA Analysis for concrete structures, the technical reference manual states that "This analysis method will accommodate the requirements as specified in Section 10.10 of the ACI-318 Code". I just want to confirm the following: 1. Is section…
  • Implementation of P-Delta Effects for Semirigid Diaphragms (RAM Frame Release 14.02)

    By Bulent N. Alemdar, Ph.D., P.E. Introduction P-Delta effects are due to adverse effects of gravity loads on building responses under lateral loads (such as wind and seismic load cases). Thus, additional forces arise because of coupling between…
  • MODIFICATION TO CURRENT P-DELTA IMPLEMENTATION FOR RIGID DIAPHRAGMS (RAM Frame, Release 14.02)

    By Bulent N. Alemdar, Ph.D., P.E. Second-order effects in buildings are generally grouped in two categories: large P-Delta effects and small P-delta effects. The former is related to additional moment applied to the structure due to axial force acting…
  • Observations on Section 10.10 in ACI 318-08

    Some Welcome Revisions I would like to commend ACI on their rework of Sections 10.10 through 10.13 in ACI 318-05, the result of which is a single Section 10.10 in ACI 318-08 that, in my opinion, reads much more clearly than previous editions of…