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The Structural Engineer

All the articles from the March 2018 issue.

Publish Date - 1 March 2018

Author – Various

Price – £25

The Structural Engineer

Roger Ridsdill Smith leads the Structural Group at Foster + Partners. In this paper, he proposes a Manifesto for Structural Design in which he sets out the four points that he considers to be essential to the design process of the group. These four points are illustrated through projects that the group has designed and delivered over the seven years since its inception.

The paper is based on Roger’s 2017 Milne Medal lecture and a presentation on creativity and collaboration that he delivered at the Bath IABSE Conference in April 2017.

Publish Date - 1 March 2018

Author – R. Ridsdill Smith (Foster + Partners)

Price – £9

The Structural Engineer

While the term 'value engineering' has become synonymous with reducing costs, CCL's approach to re-engineering key elements of the University of Sheffield’s £81M 'Diamond' building with post-tensioned concrete solutions demonstrates the potential added value of re-examining the original specification.

Replacement of the specified voided concrete slabs with post-tensioned slabs for levels 1–4 and the roof level not only saved £0.75M in costs on the project, but also saved time within the programme, reduced the amount of materials required for the build and enabled a shallower slab depth. This increased the ceiling void depth below, thereby aiding co-ordination of the building services installation by allowing simplification of cable and pipework layouts.

Re-engineering of the proposed steel transfer structures beneath the level 1 slab, with a post-tensioned concrete alternative, helped to overcome buildability, logistical and cost challenges, while creating a design feature aligned to the architect's aesthetic and conceptual vision.

A building with ambitious design criteria and multiple technical challenges, the Diamond is a landmark scheme, both for Sheffield and for the higher education sector, which demonstrates the benefits of post-tensioned concrete.

Publish Date - 1 March 2018

Author – A. Sweet (CCL)

Price – £9

The Structural Engineer

In the latest note in the series, Peter Smith gives readers tips on how to prioritise and manage their time effectively.

Publish Date - 1 March 2018

Author – P. Smith

Price – £9

The Structural Engineer

Piled foundations are one of the first aspects of scheme design a structural engineer needs to consider during a project's development. It is at this crucial stage that, without any specialist input, the structural engineer must make recommendations based on the typically limited knowledge they have on the subject.

This Technical Guidance Note describes the method by which bored piles are designed using the current UK codes of practice, i.e. BS EN 1997 (Eurocode 7). It explains how to interpret soil conditions and design piles to match what has been discovered following a site investigation.

The note does not address the types of piling systems that are available, nor the technical issues concerning their installation; these questions are covered in Technical Guidance Note Level 1, No. 23 Introduction to piling.

The note explains how to design what is essentially a buried column of concrete to resist forces from the superstructure that are applied to it. It concerns the design of a single pile and not one that is part of a group. For information on how grouped piles differ in their design approach, the reader is directed to Cl. 6.3.3 of BS 8004:2015.

(This article was update on 9 March 2018 to correct an error in Table 6.)

Publish Date - 1 March 2018

Author – C. O'Regan (AECOM)

Price – £0/£9

The Structural Engineer

Performance-based seismic design (PBSD) can be applied to the design of any structure, regardless of its importance. Nevertheless, this article will mainly be of interest to structural engineers designing new buildings or working on retrofit interventions to high-profile projects falling outside the range of applicability of prescriptive procedures for seismic design of buildings contained in standards such as ASCE 7 and the International Building Code (IBC). In particular, the article will be of interest to engineers involved in the seismic design of buildings where specific performance-in-use expectations are set by the client. It is assumed that readers of the article have a good understanding of non-linear structural mechanics, earthquake engineering and structural dynamics.

The aim of this article is to help structural engineers follow the paradigm shift in seismic engineering from the definition of prescriptive procedures to procedures based on achieving predictable performance levels. The shift will be from the overall load-reduction approach, on which the experience of many structural engineers is based, to the damage-versus-deformation approach, reflected in current approaches to PBSD.

Publish Date - 1 March 2018

Author – C. Silva (CSI Britain) and A. Calabrese (California State University)

Price – £9

The Structural Engineer

Rob Bell is inspired by this insightful and highly personal account of the engineering behind our built environment, which offers the public a window onto the secrets of the structural engineering profession.

Publish Date - 1 March 2018

Author – R. Bell

Price – Free

The Structural Engineer

This month's letters offer more views on the former Institution yearbook, as well as load factors and safety margins; consider the need for certification of as-built drawings; call for the Institution to focus more on construction and erection of structures; and return to the topic of innovation in structural engineering.

Publish Date - 1 March 2018

Author – Various

Price – £9

The Structural Engineer

Upcoming events at HQ and from around the Regional Groups.

Publish Date - 1 March 2018

Author – Various

Price – Free

The Structural Engineer

In this section we shine a spotlight on papers recently published in Structures – the Research Journal of The Institution of Structural Engineers.

This month we preview the content of Volume 13 (February 2018).

Access to Structures is free to Institution members (excluding Student members) as one of their membership benefits, with access provided via the ‘My account’ section of the Institution website. The journal is available online at: www.structuresjournal.org

Publish Date - 1 March 2018

Author – Various

Price – Free

The Structural Engineer

This month we present another question from the Institution's Structural Behaviour Course, looking at the forces in a truss.

Publish Date - 1 March 2018

Author – Various

Price – £9