A kind of prestressed reinforcement with yield platform and its prestressed member construction method

Abstract

The invention discloses a prestressed steel bar with a yield platform and a construction method for a prestressed component thereof. The weight percentage composition of the prestressed steel bar is: C: 0.456-0.49%, Mn: 1.95-2.43%, Si: 0.65-0.7% , Cr: 0.24-0.35%, V: 0.02-0.07%, S: 0.013%, P: 0.027%, Ni: 0.34-0.37%, Al: 0.05-0.06%, Nb: 0.28-0.3%, Ti: 0.015- 0.019%, the balance is Fe and unavoidable impurities. The construction method of the prestressed member is to apply prestressed force of 30%-70% of the tensile strength to the prestressed steel bar with yield platform through pretensioning method or post tensioning method to obtain the prestressed member. The invention replaces the existing technological construction method and reduces the consumption of ordinary steel bars by more than 70%.

Description

technical field [0001] The patent of the invention belongs to the technical field of structural engineering and relates to a prestressed steel bar, in particular to a prestressed steel bar with a yield platform and a construction method for a prestressed member thereof. Background technique [0002] At present, when the prestressed reinforced concrete structure is designed as a ductile structure at home and abroad, since the plastic deformation can dissipate the seismic energy, although the structural deformation will increase, the seismic action of the structure will not rise quickly, and the internal force will not increase. will increase again, so the ductile structure can reduce the load-bearing capacity requirements of the structure, and the ductile structure is an economical design strategy. [0003] The specific method is to prepare the prestressed concrete structure with 70% of the amount of common steel bars with yield platforms and 30% of the amount of prestressed ...

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Problems solved by technology

[0003] The specific method is to prepare the prestressed concrete structure with 70% of the amount of common steel bars with yield platforms and 30% of the amount of prestressed steel bars, and the structural bearing capacity is mainly borne by 30% of the prestressed steel bars, so that The design consumes a large amount of ordinary steel bars to increase the requirements of ductile structures, which has the disadvantages of large steel consumption and waste of resources.