International Codes 2007
Transcript of International Codes 2007
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European Codes - National Annexes to Eurocode 3 [EN 1993-1-1:2005]
7D.5 Singaporean National Annex to EC3
Adds values from the Singaporean National Annex ‐ titled National Annex to Standard SS‐EN 1993‐1‐1 ‐ for use with Eurocode 3, or EN 1993‐1‐1:2005. The NA document makes small changes to the base document.
Refer to the basic code (EC3) for a description of these clauses. The sections below refer to the corresponding clauses in the Singaporean‐NA.
The following clauses are not implemented in STAAD.Pro:
Clause 6.3.2.4(1) B – Slenderness for flexural buckling The SINGAPORE NA specifies the value of λc0 for I, H channel or box section to be used in equation 6.59 of SS EN 1993‐1‐1:2005 as 0.4. However, STAAD.Pro does not use this clause for design per EC‐3. Therefore, this clause is ignored for the Singaporean National Annex.
Clause 6.3.2.4(2)B – Modification factor ‘kfl’ The value of the modification factor kfl to be used in equation 6.60 of SS EN 1993‐1‐1. However, STAAD.Pro does not use this clause for design per EC‐3. Therefore, this clause is ignored for the Singaporean National Annex.
The clauses/sections in EN 1993‐1‐1:2005 (hereafter referred to as EC‐3) that have been dealt with in the Singaporean National Annex (hereafter referred to as SS‐NA) and that are relevant to the proposed implementation are:
Clause 6.1 – General
Clause 6.3.2.2 – Elastic critical moment and imperfection factors for LTB checks
Clause 6.3.2.3(1) – LTB for rolled sections or equivalent welded section
Clauses 6.3.2.2 and 6.3.2.3 — Calculation of LTB Reduction factor, χLT as per Singaporean NA
Clause 6.3.2.3(2) – Modification factor, f, for LTB checks
Clause 6.3.3(5) – Interaction factors kyy, kyz, kzy, and kzz
Clause 6.3.1.4 ‐ Slenderness for torsional and torsional‐flexural buckling
Page 1 of 1Singaporean National Annexes to Eurocode 3 [EN 1993-1-1:2005]
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