Design Aid For Eurocode

The aim of this publication is to illustrate through worked examples how Eurocode 2[1-4] may be used in practice to design in-situ building structures. It is intended that these worked examples will explain how calculations to BS EN 1992—1 —1[1] may be performed. This will be carried out within the environment of other relevant publications:

■ Other Eurocodes.

■ Material and execution standards.

■ Publications by The Concrete Centre and others.

There are, therefore, many references to other documents and while it is intended that this publication, referred to as Worked examples, can stand alone it is anticipated that users may require several of the other references to hand, in particular, Concise Eurocode 2 [5], which summarises the rules and principles that will be commonly used it the design of reinforced concrete framed buildings to Eurocode 2.

Figure 1.1

Worked examples in context

Figure 1.1

Worked examples in context

The worked examples relate to in-situ concrete building structures. The designs are in accordance with Eurocode 2 Part 1-1[1], as modified by the UK National Annex[1a] and explained in PD 6687[5]. The design of other forms of concrete are covered in other publications[6-9].

Generally, the calculations are cross-referenced to the relevant clauses in Eurocode 2[1-4] and, where appropriate, to other documents. See Table 1.1 for a guide to presentation and Section 11 for references. All references in the margins are to Eurocode 2 Part 1-1[1] unless indicated otherwise. References to BS 8110[10]refer to Part 1 unless otherwise stated.

Generally, the 'simple' examples depend on equations and design aids derived from Eurocode 2. The derived equations are given in Appendix A and the design aids from Concise Eurocode 2[11] are repeated in Appendix B.

The examples are intended to be appropriate for their purpose, which is to illustrate the use of Eurocode 2 for in-situ building structures. There are simple examples to illustrate how typical hand calculations might be done using available charts and tables derived from the Code. These are followed by more detailed examples illustrating the detailed workings of the codes. In order to explain the use of Eurocode 2, several of the calculations are presented in detail far in excess of that necessary in design calculations once users are familiar with the code. To an extent, the designs are contrived to show valid methods of designing elements, to give insight and to help in validating computer methods. They are not necessarily the most appropriate, the most economic or only method of designing the members illustrated.

Table 1.1

Guide to presentation_

Relevant clauses or figure numbers from Eurocode 2 Part 1-1 (if the reference is to other parts, other Eurocodes or other documents this will be indicated)

From the relevant UK National Annex (generally to Eurocode 2 Part 1-1)

From both Eurocode 2 Part 1-1 and UK National Annex

Section 5.2

SMDSC

Relevant parts of this publication

Relevant parts of Standard method of detailing structural concrete - a manual for best practice.

<Concise EC2>

Concise EC2

Concise Eurocode 2

How to, Floors

How to design concrete structures using Eurocode 2: Floors

As some of the detailing rules in Eurocode 2 are generally more involved than those to BS 8110, some of the designs presented in this publication have been extended into areas that have traditionally been the responsibility of detailers. These extended calculations are not necessarily part of 'normal' design but are included at the end of some calculations. It is assumed that the designer will discuss and agree with the detailer areas of responsibility and the degree of rationalisation, the extent of designing details, assessment of curtailment and other aspects, that the detailer should undertake. It is recognised that in the vast majority of cases, the rules given in detailing manuals[12'13] will be used. However, the examples are intended to help when curtailment, anchorage and lap lengths need to be determined.

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