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Motera Stadium, Ahmedabad, India, is the largest cricket stadium in the world. The designers chose to use precast concrete for the structure, and they strived to minimize the number of elements and their joints. This resulted in large and heavy sections with complex, asymmetrical geometries. This article discusses the rigging and assembly of the precast elements that form the structural system of the upper bowl of the stadium.
Available in the following language(s): Spanish
To create a perimeter band of free-flowing workspaces with maximal views of the surrounding landscape at the Novartis Oncology Research Building in East Hanover, NJ, the designers significantly set back the columns from the façade, resulting in long-span cantilevers and large, column-free expanses. The challenges with the quantity and density of a bonded post-tensioning system necessary to meet performance requirements could only be met through open, creative, and precise collaborative efforts between the owner, builders, manufacturers, installers, and designers.
Available in the following language(s): Japanese
A portion of 55 Hudson Yards, a high-rise in New York, NY, is being constructed over and supported by an existing structure. The challenge was to match the anticipated reactions of the new construction to the location and capacity of the columns of the existing structure. The design highlights are summarized and details on how the hyperstatic actions generated by post-tensioning were used to achieve the design objectives are provided.
Available in the following language(s): Japanese
Due to the development of powerful high-range water-reducing admixtures and viscosity modifying admixtures, it is now possible to very efficiently and economically build high-rise concrete structures. These admixtures allow concrete to be pumped from the first to the highest floor, so it is no longer necessary to use cranes to transport and place concrete. This article shows how the construction of high-rise buildings has evolved from entirely structural steel structures to almost exclusively reinforced concrete structures, by discussing the construction of some landmark structures built from 1968 to the present.
Available in the following language(s): Spanish, French, Polish
In theory, the knowledge is available to ensure reliable fastenings with adhesive anchors and to give designers and installers confidence and flexibility in myriad applications. However, with the failure of adhesive anchors in Boston, MA, the installation and use of these types of anchors has been called into question. To figure out what can be improved with regard to the use of adhesive anchors, adhesive anchor installations with injection systems were monitored on 23 job sites in five locations scattered over the U.S. Critical aspects were examined to determine gaps between actual and recommended practice and to come up with proposals to improve installation practices.
Available in the following language(s): French