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 SSEN 199311 for use with Eurocode 3, or EN 199311:2005. 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 SingaporeanNA. 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 199311:2005 as 0.4. However, STAAD.Pro does not use this clause for design per EC3. 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 199311. However, STAAD.Pro does not use this clause for design per EC3. Therefore, this clause is ignored for the Singaporean National Annex. The clauses/sections in EN 199311:2005 (hereafter referred to as EC3) that have been dealt with in the Singaporean National Annex (hereafter referred to as SSNA) 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 torsionalflexural buckling Page 1 of 1 Singaporean National Annexes to Eurocode 3 [EN 1993-1-1:2005] 11/4/2015 mk:@MSITStore:C:\SProV8i\STAAD\Help\International_Codes_2007.chm::/European_C...

Transcript of International Codes 2007

Page 1: International Codes 2007

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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