Search found 883 matches

by huffte
21 Sep 2020, 14:14
Forum: 03-Analytical/modelling capabilities
Topic: Pounding Effect
Replies: 1
Views: 10

Re: Pounding Effect

A forum search on the term 'pounding' will give quite a few hits and should get you on your way.
by huffte
21 Sep 2020, 14:13
Forum: 03-Analytical/modelling capabilities
Topic: Base Isolator
Replies: 1
Views: 9

Re: Base Isolator

There are some models of isolated structures on the SeismoStruct support page found here: https://seismosoft.com/seismobuild-seismostruct-sample-models/ Isolators in these models have been treated as link-type elements using, for example, the bi-linear kinetic, link element. See the User's Manual fo...
by huffte
15 Sep 2020, 17:58
Forum: 03-Unexpected behaviour/errors
Topic: Seismomatch- Matching of Time History
Replies: 4
Views: 35

Re: Seismomatch- Matching of Time History

First, this is not unusual. A pioneer of spectral matching has been quoted as saying that 80% of the records generated through such processes should be discarded. This does not mean it is not a valuable tool. It just means you have to put a good deal of work into doing it correctly. Your period rang...
by huffte
03 Sep 2020, 15:10
Forum: 03-Analytical/modelling capabilities
Topic: How to define element class for concrete shear wall element?
Replies: 2
Views: 21

Re: How to define element class for concrete shear wall element?

Chapter 4, Example 2, of the Verification Report should be an excellent guide in modelling shear wall structures. It is found on Page 77 of the Report.
by huffte
02 Sep 2020, 14:19
Forum: 04-Unexpected behaviour/errors
Topic: cyclic loading for masonry infilled frame
Replies: 3
Views: 2952

Re: cyclic loading for masonry infilled frame

The following verification problems should be very useful in understanding the steps required for various forms of cyclic loading. Chapter 2, Example 11. 2D Frame Subjected to Earthquake Loading Chapter 2, Example 16. SDOF System Subjected to Harmonic Loading Chapter 4, RC Building Example 1. Nonlin...
by huffte
01 Sep 2020, 00:41
Forum: 04-Unexpected behaviour/errors
Topic: IDA not yielding results
Replies: 4
Views: 88

Re: IDA not yielding results

Just to be clear and rule out the potential units issue: 1. When you define the time history curve, you specify a factor of 0.01 to get cm to m. 2. When you define the loading, you specify a factor of 1.0, since you converted the units in defining the curve. If these are true, I believe you are corr...
by huffte
31 Aug 2020, 16:02
Forum: 02-Getting started with the modelling
Topic: eigen value
Replies: 4
Views: 57

Re: eigen value

You can place a node in the exact center and connect it to the corners with rigid links. Depending on your intended model, you may have to use rigid links to more than the corners.
by huffte
31 Aug 2020, 15:05
Forum: 02-Getting started with the modelling
Topic: eigen value
Replies: 4
Views: 57

Re: eigen value

If the exact center of mass has, indeed, not been defined, then you likely have eccentric mass distributions at one or more levels, which would indeed produce multi-directional displacements, even if the stiffness is symmetric. Both mass and stiffness must be perfectly symmetric in order to expect n...
by huffte
31 Aug 2020, 15:02
Forum: 04-Unexpected behaviour/errors
Topic: IDA not yielding results
Replies: 4
Views: 88

Re: IDA not yielding results

This looks as though it could be a units problem. I typically load accelerograms in units of g. I typically use units of inches and seconds. So, when I apply a particular accelerogram as a nodal loading, I have to specify a factor of 386. Just a thought, but double-check the scale factor you applied...
by huffte
16 Aug 2020, 01:03
Forum: 03-Analytical/modelling capabilities
Topic: Regarding target displacement
Replies: 14
Views: 222

Re: Regarding target displacement

The Help system has a lot of good information on 'Target Displacement'. I typically don't use auto-calculated target displacement, but specify my own. Start with a reasonable guess. If that doesn't push it far enough, increase on the next run. If that pushes too far, you can reduce on the next run. ...

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