2 August 2012
First published: 2 August 2012
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This paper looks at the possibility of using cross-laminated timber (CLT) construction to support commercial buildings to 30 levels. A prototype building structure is proposed and analysed using an elastic analysis program. The main structural elements, including a central tube core, columns and beams, are made of cross-laminated timber. The CLT panels are arranged to ensure structural efficiency with minimal material wastage. The CLT central core is assisted by steel stays (like those of a yacht), and reiforced concrete beams which act like wine barrel hoops. Consideration is given to the design of simple but stiff joints. The structural elements are examined for strength and the building deﬂections are noted. The paper concludes that the proposed structural system with CLT elements is likely to be suitable for buildings to 30 levels.
The Awa Shirasagi Ohashi Bridge, which includes novel structural systems, was recently constructed in Tokushima, Japan (Figure 1). There were a number of severe design constraints for the project. The bridge is located in a very environmentally sensitive area. The site is also in a seismic region and is frequently struck by typhoons. Furthermore, the bridge was to be founded on soft alluvium, and to be constructed to a tight budget. These exceptionally challenging constraints led engineers to adopt a novel combination of structural forms, including the ‘cable egret’ cable truss system, an improved form of the permanent tubular steel pile cofferdam foundation and a steel- concrete composite sandwich slab deck.
All articles published in the August 2012 issue.