xl 5889's Activities

Beam end force vs reaction force

xl 5889 — Mon, 07 Mar 2022 13:53:46 GMT

Hi all, why the beam end force doesnt match with reaction forces at support ? Which one shall I follow ?

Plaxis academic version

xl 5889 — Tue, 16 Nov 2021 02:25:51 GMT

When I opened the previosly saved plaxis file, it all became academic version, I ended up can't access the file . Is there anyway to access the previously saved file ? I am using the advanced 21 version, not any academic version, why it will become academic version suddenly?

Spring in compression vs reaction

xl 5889 — Thu, 19 Aug 2021 14:52:25 GMT

Say that I have a slab supported by 4 columns and the base is raft foundation. I have assigned area spring in compression only below raft.
I found that when the area spring is higher, the reaction of the column will be higher as well. I think this is incorrect, because the reaction of column depends on the loading above.
Can anyone help to explain this ? Perhaps my concept is wrong, can anyone help to explain what is area spring and its relationship with compression reaction ??

Spring stiffness

xl 5889 — Fri, 04 Jun 2021 01:01:19 GMT

Say that I have a beam that's not perfectly in x/z direction,

First joint is (2,0,2) , second joint is (3,0,8),

Then, how shall I define the stiffness of the spring ? The fixed but Mx, My , Mz options in staadpro refer to global x, y, z axes or local axes x,y, z of member ? It's not stated in the manual...

Anyway to set the stiffness based on local x,y,z axes of member ??

Design of curve beam using staadpro

xl 5889 — Thu, 03 Jun 2021 16:05:28 GMT

Can staadpro design curve beam and showing the torsion value of the beam ? Shall it break the curve beam into small parts or directly use the cruve beam options in Staadpro to create the curve beam ? Can the Staadpro design the torsion of cruve beam and display the torsion diagram at the whole stretch of curve beam ?

Deflection of member

xl 5889 — Wed, 02 Jun 2021 05:48:55 GMT

How to check and ensure all the delfection of member are within limits? The limits of code I am using is L/200.... I have many memebrs in the strucure .. Can staadpro let me input the limit and prompt me when specified members failed in deflection ?

I am only able to get the max deflection of beam in the beam defelction summary , which stated the max deflection of all members only, but I am not sure which member failed in deflection....

Include Moving Load in Load combination

xl 5889 — Tue, 01 Jun 2021 04:21:34 GMT

I have generated the moving live load using... However, I am not able to include the generated moving live load in the load combination...Can someone guid eme how to include the generated moving live load in the load combination ???

Load Combinations Using Moving Loads

Carl Oberg — Fri, 15 Jan 2016 14:56:38 GMT

I have run into this problem several times now and have not found a good solution for it yet. I am modling a large structure in which I need to consider several loaded lanes of traffic traveling accross it. To generate the moving truck loads I am using STAAD's vehicle definition and load generation features. The structure I am analysing is approximately 96 feet long and i need to consider all possible load patterns for 4 lanes. From what I have found there is no way to include load generations within a load combination. To get around this I have taken load generated for each lane and put them into their own envelopes (i.e. all loads that get generated for the moving load in lane one get enveloped). In order to make the necessary AASHTO Load combinations I then have to export all results out of the prgram into Microsoft Excel where i can take the enveloped results and combine them with the results from any of the other static loads that have been applied. This is a very tedious and time consuming process in which there is great potential for human error. Is there any other way that these load generations can be combined with other load cases within the STAAD.pro program so that I do not have to export the data out and do it manually? Also, I am not able to use the STAAD.pro BEVA package for this as it is not approved for use by the DOT we are working for. Any input or suggestions on this would be much appreciated. Thanks.

some member are not designed

xl 5889 — Thu, 27 May 2021 12:53:57 GMT

I have added new beams after running the analysis. However, the newly added member are not designed. I have reassigned the newly added member many yimes, and rerun the analysis multiple times, yet , to no avail . How to resolve this ?? How to ensure that all member are designed ?

Torsional moment vs bending moment

xl 5889 — Mon, 05 Aug 2019 16:33:18 GMT

In the software, Moment about x axis was defined as torsional moment.. While moment about z and y axes are bending moment... Why is it ?

The direction of x, y and a axes were shown in the highlighted part..

I think it is wrong. For red circled beam, i kinda agree that Moment about x axis was defined as torsional moment.. While moment about z and y axes are bending moment...

But for blue circled beam, I think that Moment about z axis was defined as torsional moment.. While moment about x and y axes are bending moment...

Please correct me if I am wrong.https://imgur.com/a/7ZBWMcv

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Mon, 05 Aug 2019 00:00:16 GMT

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