Recent Work on the Design and Construction of Air Inflated Structures

AbstractOver the last few years our practice has been responsible for the structural design of a number of lightweight structures that achieve their structural stability by inflating elements of fabric structure. The paper will explain the design rationale of key examples; describing the structural forms, methods of analysis and design, and the detailing, materials, and methods of fabrication. The largest and most complex of these structures to date is a demountable stage set structure for the Cirque du Soleil “Toruk: First Flight” show, comprising two 15 metre high and 20 metre wide structures. The stage set structures form ‘trees’ on which acrobats climb and perform. Each structure incorporates a high level access gantry with acrobat suspension and counterweight systems, as well as a secondary inflatable skin cladding. The entire primary structure and cladding system is constructed from inflated fabric elements using internal pressures ranging from 0.5 KN/m2 up to 90 KN/m2, and are deflated down to less than 5% of their erected volume for transport between venues. Other examples of our work described will include temporary pavilions with clear spans of up to 25 metres, using a combination of air tight and air permeable elements. Also a range of wide span structures that we describe as “semi-permanent” that are capable of resisting full environmental wind and snow loading, and that are fully demountable but that can also be erected for extended periods of time in a single location

GeoAgyrtodes

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GeoEpistranus

Epistranus lawsoni (Zopheridae) BEAST profile incorporating ancestral state reconstruction with BSSVS

Epistranus_maxent

Epistranus lawsoni (Zopheridae) localities used for ecological niche modeling in Maxent. Localities are in New Zealand Map Grid (NZMG) format

Hisparonia_maxent

Hisparonia hystrix (Nitidulidae) localities used for ecological niche modeling in Maxent. Localities are in New Zealand Map Grid (NZMG) format

GeoHisparonia

Hisparonia hystrix (Nitidulidae) BEAST profile incorporating ancestral state reconstruction with BSSVS

Brachynopus_maxent

Brachynopus scutellaris (Staphylinidae) localities used for ecological niche modeling in Maxent. Localities are in New Zealand Map Grid (NZMG) format

GeoBrachynopus

Brachynopus scutellaris (Staphylinidae) BEAST profile incorporating ancestral state reconstruction with BSSVS

Agyrtodes_maxent

Agyrtodes labralis (Leiodidae) localities used for ecological niche modeling in Maxent. Localities are in New Zealand Map Grid (NZMG) format