Structural Analysis Aspects of the City Hall Complex, Tokyo, Japan

In order to resolve the problem that the old City Hall Complex of Tokyo in the Marunouchi district had become old, scattered and cramped, it was decided in 1985 to construct a new City Hall and Assembly Hall for Tokyo in the new commercial-business district of Shinjuko. Therefore, a design and planning competition was held between nine nominated teams of architects to select a master plan for this new City Hall Complex. Kenzo, Tange, Urbanists & Architects won this competition in early 1986, and performed the practical design in partnership with Muto & Associates who was in charge of the structural design. Construction work started in April 1988 and was completed in March 1991. A first article reported on architectural and structural aspects of the project. It appeared in Structural Engineering International 4/91. The present article deals with further structural analysis aspects of the City Hall Complex.