Technologies to utilize expansive energies of both expansive concretes and non-explosive demolition agents have been developed and applied widely in Japan. The expansive concretes are mainly used to improve quality of concrete structures and concrete products. This paper summarizes research results concerning estimation methods of expansive energy produced in uniaxial restrained state and multiaxial restrained one. The estimating method of expansive energy due to alkali-aggregate reaction is also referred.

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This report reviews the studies on the behavior of the beam-column joint in reinforced concrete frames, to which much attention has been paid recently among the structural engineers in Japan. It consists of four parts;(1) factors influencing the behavior of the joint core,(2) shear strength and shear transfer mechanism in the joint,(3) anchoragement of reinforcement in the joint,(4) joint behavior after yielding of the adjoining members. Also, it shows the tendencies of the test specimens, which have been carried out since 1963 in Japan.

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The ANA Information Center Building is a large-scale, computerized building, eight-stories high above the ground level, located in an area adjacent to Haneda Airport. Multiple curtain walls-consisting of PC panels, PCF panels, and aluminum curtain walls are now being used on its exterior. The aluminum curtain walls have adopted the structural glazing system-The SGS method. This system is equipped with an earthquake immune mechanism which is the first case to be used in Japan. Although the curtain wall method has been used regularly, problems have been arisen in our lack of data and knowledge, when adjusting the movement to the fitness accordingly. Another problem resulted in the lack of time we had with this project. To keep up the high standard of quality in such a short period of time, and also to give recognition of our initial plan, we reviewed and examined all data thoroughly. After that, our results were confirmed by conducting a full-scale test. This is a prime example of how such results were feed back into the design. Thus reflecting our work execution in which high quality products can materialize in such a short period of time.

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The cultural centre “SHONANDAI”, which is most excellence plan at the open proposal design competition by locality self-government body, is now under construction. Zone of above the ground characterized as composition of group of symbols (group of little rooves, globe, murmuring, etc.) according to the theme, that is “Building as second natural” and “Building as heart character of group”. The other side,that is laid 2/3 of total volume as type of box as modern building. Corresponding to such design, structural designer executed group of planning and analyzing too (underground structure, flat beam, lozenge lattice beam, buoyancy, geodesic dome, etc) by the lead of the theme “The ship of taking microcosm on board”.

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