Shivam Sharma's Communities Activities

Concrete pipe encasement design

Shivam Sharma — Thu, 17 Jun 2021 07:36:44 GMT

Hi,

I am designing a concrete pipe encasement.

I am aware that we can analyse a hollow concrete section using tapered tube section in STAAD. However, can we also design it using RC designer ? Does STAAD has that capability ?

Thanks,

Shivam

Modelling settlement for slab-on-grades

Shivam Sharma — Wed, 10 Mar 2021 06:35:59 GMT

Hello,

Could any of the members advice how you can model settlements in slab-on-grade within STAAD ?

Thanks,

Shivam

Plate analysis results - Global Moments

Shivam Sharma — Sun, 30 Aug 2020 09:17:44 GMT

Hi there,

While interpreting global moment results for plate analysis, what the does the result direction means ? I am aware that the 'up' parameter is the axis towards which the local axis of the plate points. I have a little confusion about whether the result direction means about the axis or parallel to the axis (see snippet below). I would appreciate some guidance on this.

Thanks

Shivam

Global Plate Stress

Evan Lake — Tue, 29 Aug 2017 12:23:38 GMT

Hello,

When working with plate stresses, there is a stress type option of 'Global Stress', where the user can choose 'Result Dir.' and' Up'. I can't seem to find a description or derivation for this stress type in the Help. Can I get an explanation / clarification on what this type of stress is defined as?

Thanks!

Underground concrete chamber

Shivam Sharma — Tue, 26 May 2020 06:34:20 GMT

Hi all,

I am designing a underground concrete chamber which has pipe penetrations.

I have modelled it using plate elements as shown below and used elastic mat with relevant subgrade modulus for support. The local Z is on the exterior face of the walls.

My questions are:

1. Can I use global moment/m as design moment/m ? (For example, design vertical moment for wall = result direction y, up direction x/z depending on the wall). I usually use the contour map to obtain the maximum value.

2. For the design shear force/m for wall, I am using Max of (SQX, SQY) shear stress x thickness of the wall. I understand them to be acting outside. Is this approach reasonable ?

Can you advice on this ?

Thanks.

Secant pile shaft - analysis in STAAD.Pro

Shivam Sharma — Wed, 29 Apr 2020 14:49:28 GMT

Hi there,

I have to analyse a secant pile shaft with a capping beam ( see about secant pile here: http://www.railsystem.net/secant-pile-walls/).

Every alternate pile is plain concrete, known as soft piles.

From my understanding, I will be using following steps:

1. Define a cylindrical frame with a capping beam on top.

2. Assign vertical members dimension and material properties

3. add spring support at nodes with stiffness computed by (area x subgrade)

4. add laterals loads

5. run analysis

however, I have following questions:

1. Should I be using horizontal 'dummy' members to connect all the piles and release moments at both ends of each of the members on the piles ? What would be the best properties for such members

2. How can ensure the moment from soft piles are transferred to hard piles (reinforced piles)

I will appreciate some advice on this.

Thanks,

Shivam

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Wed, 29 Apr 2020 02:47:50 GMT

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