プレストレスト・ケーブルネット構造に関する一実験

Abstract

For the large roofs of sub-gates for EXPO'70, a prestressed suspended roof was adopted.Two types of model tests were conducted to obtain informations for the design of the structure:wind tunnel tests to know the nature of wind loading, and static loading tests to know the staticperformance.Wind tunnel tests were carried out on 1/100 scale models of plastics and rubber sheets.Wind pre3sure distributions on roof surfaces were obtained for nine cases of horizontal and verticalwsnd directions. Dynamic behaviors of roof membranes in wind were observed and someresults were obtained.Also a cable model, which had a scale of 1/15, was tested statically, making use of the windtunnel test results. Data were obtained for the determination of the initial prestressing forcedistribution, the situation of the change in cable tensions under load, and the deflections of theroofs.A numerical calculation was made on the above mentioned problems. The result from theanalysis is compared with the test result and a brief discussion is made.