丹下健三研究室のコンピュータ利用の再評価と今日的意義について

－コンピュータシミュレーションを用いたデザイン手法とその理論に着目して－

抄録

 Through the analysis of the design method of Kenzo Tange Laboratory, the University of Tokyo, and the theory as its background, this study has clarified how the clear system in the urban design of Tange Laboratory has been adopted to the computer simulation and examined the significance of the method in the present context. After organizing the cases where computer is used in the early stage of Japanese architecture field, the study has clarified that the use of computer by Tange Laboratory had uniqueness in the point that the target of such use was the urban area. The study showed that this viewpoint of the use of computer by Tange Laboratory was related to the leading study in the United States at that time that was conducted by K. Lynch and C. Alexander, and discussed about its characteristics.
 The study indicated that the computer simulation method of Tange Laboratory could be broadly classified into the one of macro type that treats the whole nation and the one of micro type that treats human spatial cognition. The simulation of macro type is related to the simulation method of social sciences at that time, such as system dynamics or discrete simulation, which was distinctive in the point that such simulation intended to introduce the viewpoints of social sciences in addition to the rationality of civil engineering. The simulation of micro type is related to urban space analysis by K. Lynch, which was outstanding in the point that such simulation was carried out to understand how the elements of scenery image would influence the human spatial cognition, without liMITing to the issues whether the spot is visible or invisible. Through the analysis for the project of Tange Laboratory that was conducted by using these computer simulations, the study clarified that the computer simulation method of Tange Laboratory was the one that was developed from the study on the urban area of Tange Laboratory conducted before the introduction of computer simulation. In addition, it showed that the use of computer by Tange Laboratory has developed on the background of the development of computer technology in the same period of time and maintenance of social information environment, while correlating to urban design projects which had been worked on in parallel.
 The study clarified that the attempt of the introduction work for the use of computer by Tange Laboratory was the one that intend to develop “URTRAN” that has three subroutines as “URBOT”, “RIBOT” and “GRAPHOT”. The characteristics of “Urgorithm”, the concept of the use and development of the computer of Tange Laboratory, was that it focused on feedback circuit and human-machine system. The ideas, which attempt to produce designing plans from more diversified optimization conditions by placing the intervention of the human will on the computer processing, were the significant ones that led to the current use of computer. The study showed that the use of computer by Tange Laboratory and its concept, “Urgorithm”, was also applicable to the current computational design.