On Possibility of Using Eurocode EN 1993 as Harmonized Standard

This article presents the content of Eurocode EN1993 and analyzes its application and the possibility of its use as a harmonized standard according to Federal Law No. 184 of 27.12.2002 On Technical Regulation.


Introduction
Steel structure design using Eurocodes stipulates for the use of the following regulations: Eurocode 3 (EN1993) [1], national parameters, EN1090 standard (building structure manufacturing, acceptance, and installation), EN standards, ISO standards, etc. (standards for steel, workpieces, and consumables).

Suggested solutions
The key provisions for calculations and design are set out in Eurocode 3 (EN1993) that comprises 20 parts. The legal document serving the same design purposes in Russia is the updated Rulebook 16.13330.2017 also known as the Rulebook on Steel Structures [2]. One of the higher-tier technical regulations and rating documents in construction is the Technical Regulations on Safety [3], whose provisions facilitate the implementation of Federal Law No. 184 of 27.12.2002 On Technical Regulation [4]. According to Federal Law No. 184, the implementation of the Technical Regulations on Safety is ensured through harmonized standards [5], i.e., the Eurocodes and (EN1993) in our case.
The Eurocode program was preceded by a decree of the European Commission on the approval and implementation of the construction program in 1975 pursuant to clause 95 of the Agreement. The goal of the program was to eliminate technical barriers in trade and harmonize technical requirements.
Within this program, the Commission took the initiative in creating a set of harmonized technical rules for the structural design that would initially serve as alternatives to the existing national standards in the member states and then replace them altogether.
The Commission together with the Steering Committee of member states had been developing the Eurocode program for 15 years, and the first generation of Eurocodes appeared in the 1980es.
In 1989 What are the Eurocodes? Eurocodes are regional model standards developed collectively by standardization authorities of the EU members. They are not designed to be used as-is and must be adapted to the local context. Thus, all the countries that use them develop their national appendices to Eurocodes that list parameters (specific values) for the given country and provide complementary explanations for inaccuracies due to the translation of the standard from English into the local language, the specifics of applications, etc. After adaptation, Eurocodes become optional standards (usually as national standards). The notation of the standard, in this case, receives a prefix corresponding to the national standardization authority, e.g. СН РК EN in Kazakhstan, DIN EN in Germany, etc.
The goals of Eurocodes: • Providing generic design criteria and methods complying with the mechanical resistance, stability, and fire resistance requirements, including the durability and economy aspects; • Providing a uniform understanding of structural design among owners, managers, designers, construction supply manufacturers, contractors, and operating organizations; • Simplifying the exchange of services in construction between the member states; • Simplifying the marketing and use of construction units and elements in member states; • Simplifying the marketing and use of construction supplies and complement products whose properties are used in design calculations; • Building a generic basis for research and development activities in the construction industry; • Building the development basis for uniform design guidelines; • Improving the competitive characteristics of European construction companies, contractors, designers, and structure and material manufacturers in the global market.
The construction Eurocodes consist of the standards listed in Table 1. The key difference between the Eurocodes and the Rulebook is shown in Table 2. The rulebook regulations are based on the prescriptive rating method sets out the requirements to design, examination, construction, installation, etc. Eurocodes are generic technical documents that do not specify processing techniques and solutions but present unified calculation models and rated parameter lists. These parameters are determined independently in every country in national appendices.
Rulebooks are documents that specify construction technologies, i.e., what should be built and how it should be built. They contain directly recommended parameters and engineering techniques to achieve them, which helps satisfy all of the requirements.
The structure analysis of Eurocode 1993 for Steel Structures is presented in Table 3. Eurocode 3 is used in steel structure design for buildings and civil engineering facilities. It complies with the principles and technical requirements for safety and operation, as well as the bases of their development and calculation set out in EN 1990 on the Bases of Structural Design.
Eurocode 3 comprises only the requirements for the load-carrying capacity, operability, durability, and fire resistance of steel structures. Other requirements, e.g., the ones concerning thermal and acoustic insulations, are not considered.

Experiment
Consider the calculations for a central strut with a durability test for the cross-section selected.
EXAMPLE Load-carrying capacity and durability test for central struts. 1) Source data. An H-beam integral column (305×305×97 UKC, see Figure 1) is loaded with central compression force = = 2850 . The column flexibility λ ̅ ≤ 0,2 and ratio ≤ 0,04 (the ratio of the calculated axial force value and the critical force value for the respective instability mode in the elastic stage depending on the gross cross-section parameters). Material: S275 steel, EN 10025-2 compliant. According to Table 3 where: ε is the coefficient depending on fy; with this ratio of section dimensions, the H-beam wall is classified as Class 1.
The EN1993 cross-section classification is shown in Figure 3. Limited critical swing angle due to the loss of the local stability (less subject to deformation than 1) Local columnar deflection does not allow plastification due to the loss of local stability (Мb nd is restricted to Мm n) Local columnar deflection does not allow the bending moment necessary for plastification due to the loss of local stability (local stability loss under the elastic stage)