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Architectural Blast Design

Alan Wood & Partners www.alanwood.co.uk ARCHITECTURAL BLAST DESIGN Blast design is becoming a regular requirement in a number of buildings and is no longer restricted to underground shelters and sensitive military sites. Many industrial sites now carry out processes that require building within the vicinity to be blast resistant. DESIGN BLAST RESISTANT SACRIFICIAL WALL Brick masonry wall Concrete wall Back sheet Foam core Front sheet Foam core Front sheet Explosion The planning and design stages are vital when trying to safeguard a building against blast-induced threats. The diagram above illustrates how a sacrificial wall can provide resistance against a blast. Continuous collapse can generate vertically upward or downward from the source of the explosion, and it can propagate laterally from bay to bay as well. The design criteria addresses the issue of progressive collapse by using a variety of approaches including: INDIRECT DESIGN by providing prescriptive design measures such as requiring special seismic detailing at column-spandrel connections, design of the roof for a prescribed static loading, or using two-way systems to improve redundancy. DIRECT LOAD DESIGN of the member to resist the explosive loads generated by design threat. For example, the design of a column to resist the effects of a hand carried weapon placed directly against it. ALTERNATE LOAD PATH design by considering the effect of loss of each perimeter column or other critical load bearing members on the stability of the building. Corner columns present the greatest challenge for progressive collapse prevention. In some cases, a separate criteria document is provided for progressive collapse prevention which outlines in detail what the designer needs to do to satisfy the requirements. Some solution concepts for meeting these requirements include: The use of moment 1 frames for steel buildings Doubling the columns along the perimeter Using cables embedded in concrete spandrel beams Designing load bearing walls as deep beams to span across the damage Design each floor level to carry its own weight ALAN WOOD & PARTNERS At Alan Wood & Partners we have a wealth of experience surrounding this specialist area of engineering design and are frequently engaged to integrate blast design into the existing norms for structural design. A challenge which is achievable. Our expertise was initially gained in the petrochemical sector but as our capability has developed, we have expanded into a range of sectors worldwide. Structural Engineering is key to any blast design projects. Find out more here: alanwood.co.uk/category/structural-engineering Alan Wood & Partners have seven offices across the UK Hull, Leeds, Lincoln, London, Scarborough, Sheffield and York. Established in Hull in the 1960's, Alan Wood & Partners provide a comprehensive the construction industry. range of engineering services Alan Wood & Partners are proud to deliver outstanding customer care, delivered by specialist teams, with the skills and experience required. Alan Wood & Partners www

Architectural Blast Design

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Blast design is becoming a regular requirement in a number of buildings and is no longer restricted to underground shelters and sensitive military sites. Many industrial sites now carry out processes ...

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