Search found 976 matches
- 04 Apr 2024, 15:02
- Forum: 04-Unexpected behaviour/errors
- Topic: Pushover Analysis Error
- Replies: 13
- Views: 4136
Re: Pushover Analysis Error
I have encountered situations similar to that you describe. The issue was a real failure of the material based on fracture strain being achieved. I wonder if you might check the parameters in your material definition and in your performance criteria. Then compare limiting values you specified to the...
- 18 Feb 2024, 16:18
- Forum: 04-Unexpected behaviour/errors
- Topic: Unable to apply the next load step
- Replies: 5
- Views: 314
Re: Unable to apply the next load step
It could be that the structure cannot withstand the higher seismic ground shaking. Even if you have no code checks, the rebar still has a fracture strain, the concrete still has a confined compressive strength, the confined concrete still has a strain limit, etc. . . .
- 14 Jan 2024, 16:56
- Forum: 03-Analytical/modelling capabilities
- Topic: damping
- Replies: 8
- Views: 37576
Re: damping
The nonlinear load displacement behavior adds effective damping. For overall elastic, initial component damping, that is up to the user. There are many different philosophies regarding this initial damping. Some would say the traditional 5% is excessive for nonlinear analysis. Some would say this in...
- 14 Jan 2024, 16:51
- Forum: 03-Analytical/modelling capabilities
- Topic: Confinement factor
- Replies: 11
- Views: 44523
Re: Confinement factor
You can specify "Output Stresses and Strains" at selected points in the pre-processor "Analysis Output" tab and then plot stress versus strain for those points in the post-processor. You need to select the appropriate points in order to make the results available in the output. I...
- 07 Jan 2024, 17:45
- Forum: 03-Analytical/modelling capabilities
- Topic: Incremental Dynamic Analysis
- Replies: 5
- Views: 3289
Re: Incremental Dynamic Analysis
The curve multiplier depends on the units used in your accelerogram input and the units valid in SeismoStruct. Typically, an accelerogram is input with units of g. A typical unit in SeismStruct is cm/sec/sec. For this example, the curve multiplier would need to be 981 to convert the input accelerati...
- 06 Jan 2024, 18:48
- Forum: 03-Analytical/modelling capabilities
- Topic: What is the difference between the pushover module and the static time-history module?
- Replies: 4
- Views: 3722
Re: What is the difference between the pushover module and the static time-history module?
I believe if you will examine ASCE 7 closely, you will find that the 100-30-30 rule is applicable for (a) the equivalent lateral force procedure and (b) dynamic response spectrum analysis using modal superposition. When response history analysis (as opposed to response spectrum analysis) with proper...
- 23 Dec 2023, 16:42
- Forum: 03-Unexpected behaviour/errors
- Topic: Damping
- Replies: 1
- Views: 3531
Re: Damping
This is not necessarily a surprise. You could get different accelerograms matching the same target spectrum. The key is to examine the accelerogram response spectrum and compare to the target response spectrum in all three cases. If the match between ground motion and target spectra is satisfactory,...
- 29 Nov 2023, 19:39
- Forum: 02-Analytical capabilities
- Topic: Difference Between Seismosignal and Seismosignal 3D
- Replies: 3
- Views: 5020
Re: Difference Between Seismosignal and Seismosignal 3D
Yes, that is correct. By directional spectra I mean the orientation-dependent rotated component spectra (RotDxx).
- 26 Nov 2023, 21:46
- Forum: 02-Analytical capabilities
- Topic: Difference Between Seismosignal and Seismosignal 3D
- Replies: 3
- Views: 5020
Re: Difference Between Seismosignal and Seismosignal 3D
SeismoSignal3D will produce directional spectra, as you have noted. SeismoSignal3D does not have the capability of producing either (a) response history analyses for SDOF systems found in SeismoSignal or (b) inelastic spectra found in SeismoSignal. I have found both programs to be extremely useful a...
- 18 Nov 2023, 22:39
- Forum: 02-Analytical capabilities
- Topic: vertical component of synthetic accelerograms
- Replies: 3
- Views: 4861
Re: vertical component of synthetic accelerograms
As long as the defined target response spectrum is a vertical component response spectrum, there is no reason that SeismoArtif wouldn't work very well. So the key will be coming up with the appropriate vertical target spectrum. In the past, vertical spectra were taken to be 2/3 of the horizontal geo...