Recently in our country, it has a tendency to use positively prestressed reinforced concrete in the feild of building and/or many constructions, and this phenomenon is getting more increasing. Here in this paper, author explained the basic characteristics and significance of the prestressed reinforced concrete, and also were introduced foreign/domestic researches of this feild, trends of the standard and showed some examples of the enforcement.

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The author explains the recent inactive depressed trends and circumstances of concrete pavements in Japan, and points out some problems inherent to the design of concrete pavements, comparing with the design examples in Europe and America and consulting research works.

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This paper is intended to report the seismic testing of RC full-scale building on U. S.-Japan cooperative research program. The building designed in accordance with both U.S. and Japan codes was tested by means of newly developed Pseudo-dynamic' Drocess. This is different from static loading test, characterized by applying load to the building so that the displacement obtained from response analysis based on test data may be attained. Testing results were summarized in terms of lateral-resistance capacity and deformation capacity of the building as well as time history of response displacements for testing and preliminary analysis.

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Tsukiji Central Wholesale Market Building was rebuilt with a large truck parking place called artificial ground. Provided grid span was about 20 meters and the depth of beam was 1.5 meters, the prestressed concrete structure was applied in the frame. The rigid frame due to the multispan-continuoussed Box Girder could be accomplished first in Japan by the method of sliding meckanism, which could slide freely the elastic shortening to be caused by prestress, and then the Box Girder was combined with the column by the posttensioned vertical tendons. After the topping concrete slab was cast in place on the precast DT-slab to be set between the Box Girders, the slab was compounded by the secondary prestress.

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