kSIST-TS FprCEN/TS 1993-1-101:2022

Eurocode 3: Design of steel structures - Part 1-101: Alternative interaction method for members in bending and compression

(1) This document provides an alternative method for the stability verification of steel members under compression axial force and bending moment, with reference to EN 1993 1 1.
NOTE   For the applicability of this document, see Clause 4.
(2) The method given in this document applies to uniform steel members with double symmetric cross-section under axial compression force and bi-axial bending.

Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1 101: Alternative Interaktionsmethode für Bauteile unter Druck und Biegung

(1) Dieses Dokument enthält ein alternatives Nachweisverfahren für die Stabilität von Stahlbauteilen unter Drucknormalkraft und Biegemoment mit Bezug auf EN 1993 1 1.
ANMERKUNG   Bezüglich der Anwendbarkeit dieses Dokuments siehe Abschnitt 4.
(2) Das Verfahren in diesem Dokument ist für gleichförmige Stahlbauteile mit doppelt-symmetrischen Querschnitten unter Drucknormalkraft und zweiachsiger Biegung anwendbar.

Eurocode 3: Calcul des structures en acier - Partie 1 101: Méthode de calcul pour la stabilité des barres en acier sollicitées en compression et flexion bi-axiale

(1) Ce document fournit une méthode pour la vérification de la stabilité des barres en acier sous effort axial de compression et moment fléchissant, en se référant à l’EN 1993 1 1.
NOTE   Pour l’applicabilité de ce document, voir le Paragraphe 4.
(2) La méthode donnée dans ce document s’applique à des barres uniformes avec section transversale doublement symétrique, soumis à un effort axial de compression et à de la flexion bi-axiale.

Evrokod 3: Projektiranje jeklenih konstrukcij - 1-101. del: Alternativna interakcijska metoda za upogibno in tlačno obremenjene elemente

(1) Ta dokument zagotavlja alternativno metodo za preverjanje stabilnosti jeklenih elementov pod kompresijsko osno silo in upogibnim momentom, s sklicevanjem na standard EN 1993-1-1.
OPOMBA:   Za uporabo tega dokumenta glej točko 4.
(2) Metoda, podana v tem dokumentu, se uporablja za enakomerne jeklene elemente z dvojnim simetričnim prečnim prerezom pod aksialno kompresijsko silo in dvoosnim upogibom.

General Information

• Status: Not Published
• Public Enquiry End Date: 20-Jul-2022
• Publication Date: 16-Jan-2023
• ICS: 91.010.30 - Technical aspects
• ICS: 91.080.13 - Steel structures
• Technical Committee: KON - Structures
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Mandate: M/515 - Mandate for amending existing Eurocodes and extending the scope of structural Eurocodes
• Ref Project: CEN/TS 1993-1-101:2022 - Eurocode 3: Design of steel structures - Part 1-101: Alternative interaction method for members in bending and compression

Overview

CEN/TS 1993-1-101:2022 - Eurocode 3: Design of steel structures, Part 1‑101 - provides an alternative interaction method for the stability verification of steel members subjected to axial compression and bending. Prepared as a Technical Specification consistent with EN 1993‑1‑1:2022, this document re‑uses the interaction approach formerly given in Annex A of EN 1993‑1‑1:2005. It is intended for uniform steel members with double‑symmetric cross‑sections under axial compression and bi‑axial bending. National Annexes determine the applicability of this CEN/TS in each country.

Key topics and technical requirements

• Scope and applicability
  • Alternative method for combined axial compression and bending verification (bi‑axial bending).
  • Applies to uniform, double‑symmetric cross‑sections; national choice governed by EN 1993‑1‑1 National Annex.
• Interaction method
  • Uses interaction factors (kij) and reduction factors (χ) to combine axial and bending effects.
  • Consistent notation and symbols with EN 1993‑1‑1:2022.
  • Provides formulae for verifying members under combined N (axial) and My/Mz (bending) including simplified criteria when out‑of‑plane buckling is prevented.
• Buckling and reduction factors
  • Includes flexural buckling factors (χy, χz) and lateral‑torsional buckling factor (χLT) per EN 1993‑1‑1.
  • Gives guidance for equivalent uniform moment factors (C) and auxiliary values needed to determine interaction coefficients.
• Design assumptions
  • Covers different cross‑section classes (Class 1–4) and plastic/elastic properties as referenced to EN 1993‑1‑1.
  • References partial factors, slenderness parameters and critical buckling loads consistent with Eurocode rules.

Applications and users

• Practical uses:
  • Stability checks for columns, compression‑and‑bending members in buildings and other steel structures where the alternative interaction approach is preferred.
  • Implementation in structural design offices and engineering software for combined loading checks.
• Key users:
  • Structural engineers and designers applying Eurocode 3.
  • Software developers integrating Eurocode stability checks.
  • Manufacturers, contractors and authorities verifying compliance with Eurocode procedures.
  • Educators and standards committees referencing alternative methods for design practice.

Related standards

• EN 1993‑1‑1:2022 - Eurocode 3: General rules and rules for buildings (primary reference).
• National Annexes to EN 1993‑1‑1:2022 - determine national application/choices for CEN/TS 1993‑1‑101.
• Other Eurocode parts addressing execution, materials and testing as referenced in EN 1993 series.

Keywords: CEN/TS 1993-1-101:2022, Eurocode 3, design of steel structures, interaction method, buckling verification, combined bending and compression, EN 1993-1-1, steel member stability.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CEN/TS 1993-1-101:2023
01-februar-2023
Evrokod 3: Projektiranje jeklenih konstrukcij - 1-101. del: Alternativna metoda
interakcije za upogibne in tlačne elemente
Eurocode 3: Design of steel structures - Part 1-101: Alternative interaction method for
members in bending and compression
Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1 101: Alternative
Interaktionsmethode für Bauteile unter Druck und Biegung
Eurocode 3: Calcul des structures en acier - Partie 1 101: Méthode de calcul pour la
stabilité des barres en acier sollicitées en compression et flexion bi-axiale
Ta slovenski standard je istoveten z: CEN/TS 1993-1-101:2022
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.080.13 Jeklene konstrukcije Steel structures
SIST-TS CEN/TS 1993-1-101:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST-TS CEN/TS 1993-1-101:2023

SIST-TS CEN/TS 1993-1-101:2023

CEN/TS 1993-1-101
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
November 2022
TECHNISCHE SPEZIFIKATION
ICS 91.010.30; 91.080.13
English Version
Eurocode 3: Design of steel structures - Part 1-101:
Alternative interaction method for members in bending
and compression
Eurocode 3: Calcul des structures en acier - Partie 1 Eurocode 3: Bemessung und Konstruktion von
101: Méthode de calcul pour la stabilité des barres en Stahlbauten - Teil 1 101: Alternative
acier sollicitées en compression et flexion bi-axiale Interaktionsmethode für Bauteile unter Druck und
Biegung
This Technical Specification (CEN/TS) was approved by CEN on 22 August 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 1993-1-101:2022 E
worldwide for CEN national Members.

SIST-TS CEN/TS 1993-1-101:2023
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 5
4 Use of this Technical Specification . 5
5 Methodology . 5

SIST-TS CEN/TS 1993-1-101:2023
European foreword
This document (CEN/TS 1993-1-101:2022) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI. CEN/TC 250 is responsible for all
Structural Eurocodes and has been assigned responsibility for structural and geotechnical design
matters by CEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under Mandate M/515 issued to CEN by the European Commission
and the European Free Trade Association.
This document has been drafted to be used in conjunction with relevant execution, material, product
and test standards, and to identify requirements for execution, materials, products and testing that are
relied upon by this document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
SIST-TS CEN/TS 1993-1-101:2023
0 Introduction
0.1 Introduction to CEN/TS 1993-1-101
EN 1993-1-1:2005 ‘Design of Steel Structures — General rules and rules for buildings’ included two
methods for the determination of interaction factors used for the verification of the buckling resistance
of members under bending and axial compression force, which were provided in two separate Annexes
A and B.
During the revision of EN 1993-1-1:2005, the standardization committee CEN/TC 250/SC 3 took a
decision to retain the method provided in Annex B in EN 1993-1-1:2022 and to move the method of
Annex A into a separate document, i.e. this document, for reasons of ease of use, without significant
modifications.
This document is therefore to be considered as an alternative method to the one given in
EN 1993-1-1:2022. Its applicability can be defined for each country, by the National Annex of
EN 1993-1-1:2022.
This document, which was prepared in line with the Eurocodes, is intended for use by designers, clients,
manufacturers, constructors, relevant authorities (in exercising their duties in accordance with
national or international regulations), educators, software developers, and committees drafting
standards for related product, testing and execution standards.
NOTE Some aspects of design are most appropriately specified by relevant authorities or, where not
specified, can be agreed on a project-specific basis between relevant parties such as designers and clients. The
Eurocodes identify such aspects making explicit reference to relevant authorities and relevant parties.
0.2 Verbal forms used in the Eurocodes
The verb “shall" expresses a requirement strictly to be followed and from which no deviation is
permitted in order to comply with the Eurocodes.
The verb “should” expresses a highly recommended choice or course of action. Subject to national
regulation and/or any relevant contractual provisions, alternative approaches could be used/adopte
...

SLOVENSKI STANDARD
SIST-TS CEN/TS 1993-1-101:2023
01-februar-2023
Evrokod 3: Projektiranje jeklenih konstrukcij - 1-101. del: Alternativna interakcijska
metoda za upogibno in tlačno obremenjene elemente
Eurocode 3: Design of steel structures - Part 1-101: Alternative interaction method for
members in bending and compression
Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1 101: Alternative
Interaktionsmethode für Bauteile unter Druck und Biegung
Eurocode 3: Calcul des structures en acier - Partie 1 101: Méthode de calcul pour la
stabilité des barres en acier sollicitées en compression et flexion bi-axiale
Ta slovenski standard je istoveten z: CEN/TS 1993-1-101:2022
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.080.13 Jeklene konstrukcije Steel structures
SIST-TS CEN/TS 1993-1-101:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST-TS CEN/TS 1993-1-101:2023

SIST-TS CEN/TS 1993-1-101:2023

CEN/TS 1993-1-101
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
November 2022
TECHNISCHE SPEZIFIKATION
ICS 91.010.30; 91.080.13
English Version
Eurocode 3: Design of steel structures - Part 1-101:
Alternative interaction method for members in bending
and compression
Eurocode 3: Calcul des structures en acier - Partie 1 Eurocode 3: Bemessung und Konstruktion von
101: Méthode de calcul pour la stabilité des barres en Stahlbauten - Teil 1 101: Alternative
acier sollicitées en compression et flexion bi-axiale Interaktionsmethode für Bauteile unter Druck und
Biegung
This Technical Specification (CEN/TS) was approved by CEN on 22 August 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 1993-1-101:2022 E
worldwide for CEN national Members.

SIST-TS CEN/TS 1993-1-101:2023
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms, definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 5
4 Use of this Technical Specification . 5
5 Methodology . 5

SIST-TS CEN/TS 1993-1-101:2023
European foreword
This document (CEN/TS 1993-1-101:2022) has been prepared by Technical Committee CEN/TC 250
“Structural Eurocodes”, the secretariat of which is held by BSI. CEN/TC 250 is responsible for all
Structural Eurocodes and has been assigned responsibility for structural and geotechnical design
matters by CEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under Mandate M/515 issued to CEN by the European Commission
and the European Free Trade Association.
This document has been drafted to be used in conjunction with relevant execution, material, product
and test standards, and to identify requirements for execution, materials, products and testing that are
relied upon by this document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
SIST-TS CEN/TS 1993-1-101:2023
0 Introduction
0.1 Introduction to CEN/TS 1993-1-101
EN 1993-1-1:2005 ‘Design of Steel Structures — General rules and rules for buildings’ included two
methods for the determination of interaction factors used for the verification of the buckling resistance
of members under bending and axial compression force, which were provided in two separate Annexes
A and B.
During the revision of EN 1993-1-1:2005, the standardization committee CEN/TC 250/SC 3 took a
decision to retain the method provided in Annex B in EN 1993-1-1:2022 and to move the method of
Annex A into a separate document, i.e. this document, for reasons of ease of use, without significant
modifications.
This document is therefore to be considered as an alternative method to the one given in
EN 1993-1-1:2022. Its applicability can be defined for each country, by the National Annex of
EN 1993-1-1:2022.
This document, which was prepared in line with the Eurocodes, is intended for use by designers, clients,
manufacturers, constructors, relevant authorities (in exercising their duties in accordance with
national or international regulations), educators, software developers, and committees drafting
standards for related product, testing and execution standards.
NOTE Some aspects of design are most appropriately specified by relevant authorities or, where not
specified, can be agreed on a project-specific basis between relevant parties such as designers and clients. The
Eurocodes identify such aspects making explicit reference to relevant authorities and relevant parties.
0.2 Verbal forms used in the Eurocodes
The verb “shall" expresses a requirement strictly to be followed and from which no deviation is
permitted in order to comply with the Eurocodes.
The verb “should” expresses a highly recommended choice or course of action. Subject to national
regulation and/or any relevant contractual provisions, alternative approaches could be used
...