• Input Support Stiffness and Damping

    Is there a way to input pile (node) stiffness and damping in Staad for a time history analysis? That means inputting support stiffness and damping values for all 6 degrees of freedom (translation and rotation)
  • time history analysis - mass participation with floor diaphragm

    When I specify a floor diaphragm in my time history analysis model, the mass participation in the x direction exceeds 100%. What is the issue behind this? Are my results reliable? If not, how do I work around the issue? Thanks! Time History - diaphragm…
  • Synthetic Time History Generation

    Hi, I generated synthetic time history for IS1893 spectrum. The obtained synthetic time history values in output file is given below. 1. What are all these 4 acceleration values and their units (g or m/s2) ? 2. The obtained time history is statically…
  • *** ERROR *** ABOVE COMMAND IS NOT RECOGNIZED. LINE IGNORED.

    i had proceed the time history analysis by using force...but the error is appear...the force = 10kN is my hydrodynamic forces calculated based on formula/equation..i had assumed the force always constant from 0s to 9s...my loading choose is time load…
  • Time History Analysis - interpretation of graph in STAAD

    .Hi, I am working on dynamic analysis using STAAD.Pro. I would like to check displacement with authorities limits during steady state (which in my case is 29.8Hz - operating frequency). Graphs of my case are shown below: Why max values are not…
  • Time velocity value STAAD is not matching with manual calculation

    STAAD SS6 20.07.11.90 Version is used I have created STAAD file with Single RPM (355) If we see the max displacement value obtained in this STAAD is 7.51 E-3 mm = 0.00751 mm Now using standard equation to calculate Velocity Velocity = ω x Dmax…
  • Warning in Staad Model in time history analysis

    Dear Forum Members, I'm doing Time History analysis. After run of model, i'm getting the below warnings, **WARNING: Time History analysis is being performed with the MASTER-SLAVE command. Forces applied at slave dof will be ignored. Revise these loads…
  • Amplitude-frequency result via Time history analysis

    Dear Sir/Madame, I have performed a time history analysis (for instance by definition of cycle=100 and frequency=50Hz and a given amplitude) for which I could have amplitude-frequency graphs as well as amplitude-time graphs as the results. I am wondering…
  • contradictory frequences in steady state analysis results

    Dear all, I have a model in which I have defined the "sin" type of time history with an operational frequency of 50Hz. In term of results, I can get both displacement-time and displacement-frequency curves which firstly mean the software has perfomed…
  • Error- with nonlinear analysis each load case must be followed by perform non linear analysis then change

    Dear Admin, I tried performing the nonlinear time history analysis feature in STAADPro, but in the end, errors occur. This error says that "each load case must be followed by performing nonlinear analysis then change." I also get a solver error. After…
  • Time history analysis response at resonance

    Hello, I have Time history model of structure supporting machine please find the attached zip file. As you can see the 2 beams parallel to z axis are subjected to 1000 kg of machine dead load which produces 1000 kg of dynamic load in x axis. Time…
  • RE: how to apply 2 ground motions simultaneously in STAAD.Pro?

    Yili : One cannot have multiple time history load cases in the same file but one is allowed to define multiple time history loads as part of the same load case. So one is allowed to define ground accelerations in the form of acceleration time histories…
  • RE: HELP REGARDING TIME HISTORY

    1. Took a quick look at the model. The only thing you may want to check is that the maximum displacement is almost 25 inches at the top node 169. This is due to the softer material you have used for the L20X20X2.5 2. You should use perform analysis…
  • RE: Sorting through Time History results

    The answer is now available at the forum post http://communities.bentley.com/products/structural/structural_analysis___design/f/5932/t/131484
  • RE: Mine Fan Foundation - Dynamic Analysis

    You can easily get the maximum displacement by looking at the Node Displacements table which basically reports the maximum response out of all instants of time at each node for a time history load case. To get the max/min out of all nodes, you can go…
  • RE: Blast analysis using Direct analysis method

    It would not be appropriate to do a direct analysis with a time history loading. Instead what you can do is a Direct analysis for all other cases and then analyze the time history loading using a PDELTA KG. That accounts for the pdelta effects in the…
  • RE: Mine Fan Foundation - Dynamic Analysis

    Sure. After you read the help documentation it may be useful to take a look at a few examples namely Example 16, 22 and 29 available as part of the help documentation as well. The corresponding STAAD.Pro models can be found within C:\SProV8i SS6\STAAD…
  • RE: Mine Fan Foundation - Dynamic Analysis

    Yes once you carry out the time history analysis you can go to the Postprocessing > Dynamics page and get time history of the velocities, displacements and accelerations as shown in the screenshot below. If you need the time-history data based on which…
  • Artificial time history matching a response spectrum

    Hello all, My question on creating time history (TH) from a response spectrum (RS). STAADPro provides the TH for a given RS in the output file but there is no option to get this TH in the text format. I save the output file as a text file. The output…
  • Query on time history analysis of 80 storied building

    I had few questions written below on Dynamic analysis. I will be obliged if somebody could help me on this issues. Awaiting for your reply. Paul Below is my example of input file where I put my questions by star marks(*) STAAD SPACE ..... JOINT COORDINATES…
  • Blast Loading in Staad

    Hi everyone. I am currently handling a structure that requires dynamic analysis for blast loads. I hope someone could enlighten me on the following: 1. Why is there a need for a dynamic analysis on blast loading? Is applying max blast wave pressure…