BuroHappold Engineering, Dubai
This presentation is a follow up to a 2015 presentation, presented at the CTBUH 9th World Congress in New York, which examined the inter relationship of construction movement on the design and construction of complex towers, through two theoretical case studies. This new presentation examines one of the towers discussed in the earlier presentation, a 320-meter-tall, geometrically complex office building, by taking the actual, measured movement, captured at various stages during construction, and comparing it to the theoretical behavior from analysis, as presented in the 2015 presentation.
By examining the real-world behavior of a structure in comparison to the theory, important lessons can be learned that help designers and contractors understand the implications of design and construction decisions and parameters, and the impact of changes to those parameters, particularly during construction. The presentation emphasizes the importance of the use of sensitivity studies, and the challenges around the use and reliability of concrete testing over relatively short time frames to determine long-term behavior, for use as a basis for design and construction decisions.
Through the comparisons, this presentation offers practical guidance to the design engineer and the contractor, for carrying out construction movement studies, to both inform the structural design and set practical tolerances for construction in the design specifications that can be reasonably achieved by the contractor. Perhaps just as importantly, the presentation provides a means for the designer and contractor to understand the difficulties faced by each, so that better cooperation can be achieved to the benefit of both.