The Prestressed Construction Technology Control of Frame Girder in High-rise Building

A number of aspects are analyzed in this paper,which include the inner force influence of the frame structure caused by stretching mode,equivalent loads,the problems with non prestressed bar design,and with the strand being laid and prestressed concrete being poured.The tensioning way and the loss of prestress with the frame girder are studied.Tensioning stress is adjusted according to the stretching test data with the frame girder.There is a deviation on expected and measured stress values during the stretching of prestressed bar.Testing and analyzing stress distribution of the frame structure complex spot can keep the prestressed construction technology in good control.