I-shaped steel for allowing prestressed steel strand to pass therethrough and application

Abstract

The invention relates to I-shaped steel for allowing prestressed steel strand to pass therethrough and application. The I-shaped steel comprises I-shaped sectional steel, prestressed steel strand holechannels, a second steel plate and a third steel plate, wherein an upper flange of the I-shaped sectional steel and the second steel plate form an upper flange of the I-shaped steel for allowing prestressed steel strand to pass therethrough; a lower flange of the I-shaped sectional steel and the third steel plate form a lower flange of the I-shaped steel for allowing prestressed steel strand to pass therethrough; holes are formed between the upper flange of the I-shaped sectional steel and the second steel plate, and between the lower flange of the I-shaped sectional steel and the third steelplate; the prestressed steel strand hole channels are arranged in the holes. A concrete framework structure is formed through adopting the I-shaped steel in a beam and / or a column. According to the I-shaped steel provided by the invention, the I-shaped steel, which allowing prestressed steel strand to pass therethrough, can be manufactured on the flange of the existing I-shaped steel by adoptinga member combination manner and previous technology biases are overcome. A concrete structure adopting the I-shaped steel has the advantages that the seismic performance of a framework structure and the connection performance of a pitch point are improved.

Description

technical field [0001] The patent of the invention belongs to the field of construction engineering, and specifically relates to an I-beam for passing through a prestressed steel strand, an installation method thereof, and a concrete frame structure containing the I-beam. Background technique [0002] In the prior art, a construction method of passing steel strands in I-beams is proposed. However, the applicant found that the above-mentioned technical scheme has the following problems in use during actual tests: 1) I-beams are generally formed by direct welding of flange plate+web plate+flange plate, and flange plate, web The plates are generally solid thin steel plates. It is very difficult to dig longitudinal holes in the I-beam formed by the solid thin steel plate, and the I-beam itself uses the upper and lower flanges to bear the bending moment. The rigidity and the bending moment of the flange of the small I-beam, and the longitudinal opening of the I-beam is very diff...

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Problems solved by technology

However, the applicant found that the above-mentioned technical scheme has the following problems in use during actual tests: 1) I-beams are generally formed by direct welding of flange plate+web plate+flange plate, and flange plate, web The plates are generally solid thin steel plates. It is very difficult to dig longitudinal holes in the I-beam formed by the solid thin steel plate, and the I-beam itself uses the upper and lower flanges to bear the bending moment. The rigidity and the bending moment of the flange of the small I-beam, and the longitudinal opening of the I-beam is very difficult, so the method and structure for opening the longitudinal hole of the I-beam flange cannot be found in the existing technology; 2) the applicant During the first test, there was a problem that the concrete was broken when the steel strand was stretched: the steel strand was set in the I-beam hole, and the surface of the steel strand was very rough, and it was directly set in the I-beam hole , when stretching, due to the friction between the steel strand and the I-beam, the steel strand will also be stretched, and then the concrete will be stretched, which is equivalent to directly applying tension to the concrete

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