STAAD.Pro Ideas Portal

Welcome to the STAAD.Pro Ideas portal. The purpose of this site is to post ideas for enhancements and new features. We value your feedback and our team regularly reviews your suggestions for consideration in future releases.

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Status Future consideration
Created by 佐野 秀昭 Hideaki Sano
Created on Nov 24, 2023

RELATED IDEAS

Using arbitrary Young's modulus (E) in AIJ2005 code calculations

In the current AIJ2005 code allowable stress calculation of STAAD.Pro, the Young's modulus is fixed at 205000 (N/mm2).

On the other hand, in the AIJ2002 code, by using the YNG=1 parameter, the Young's modulus used in the frame analysis can be used in the allowable stress calculation.

Like AIJ2002, AIJ2005 also requires YNG parameter functionality.

Stainless steel members are allowed to be used as building materials, but the Young's modulus of stainless steel is different from that of steel.

Therefore, the current STAAD.Pro AIJ2005 cannot support this.

Also, even in carbon steel, Young's modulus decreases as the temperature increases.

The design of nuclear facilities specifies a Young's modulus that decreases with temperature.

Therefore, AIJ2005 also needs a feature to consider arbitrary Young's modulus.


  • Admin
    Carlos Aguera
    Reply
    |     Nov 29, 2023

    This request has been added to the backlog.

  • 佐野 秀昭 Hideaki Sano
    Reply
    |     Nov 28, 2023

    Thank you for your comment.

    YNG parameters were introduced in AIJ2002 nearly 10 years ago, so things have changed now.

    This request is not directly due to changes in recommendations from JSME.

    Several users have asked about this feature.

    The allowable stresses for stainless steel is specified in Article 90 of the 'Building Standard Law' of Japan.

    And stainless steel sections for architectural structures are found in JIS G 4321.

    This can be done simply by introducing YNG parameters to AIJ2005.

    (AIJ2002 has YNG parameters, so it is already supported.)

    However, the AIJ2005 allowable bending stress calculation uses the shear modulus (G), so it must be taken into consideration as well.

    The allowable stresses formula in the AIJ2005 codebook clearly states E and G, unlike AIJ2002.

    With this, I think changing the AIJ2005 code will not be that difficult.

    Although I don't think it has been specified in JSME code yet, AIJ2005 is already being used in nuclear facility design.

    This feature is also useful in the design of nuclear facilities.

  • Admin
    Carlos Aguera
    Reply
    |     Nov 27, 2023

    Thank you for posting this idea. When the YNG parameter was introduced, it was made clear that this was only required for AIJ2002 and not 2005. Has there been some changes in recommendations from JSME recently? Are the requirements the same as those AIJ 2002?