Prestressed tensile reinforcement method for juxtaposed t-beam lateral linkages

Abstract

The invention relates to the field of methods or equipment for repairing or strengthening existing bridges, in particular to a prestressed tensioning reinforcement method for juxtaposing T-beams in transverse connection. A pre-stressed tensioning reinforcement method for juxtaposed T-beam lateral connection, comprising ① arranging a beam, characterized in that it also includes the following steps: ② drilling; ③ tensioning cables; ④ tensioning. The invention has simple equipment, convenient operation, good durability and quick construction.

Description

technical field [0001] The invention relates to the field of methods or equipment for repairing or strengthening existing bridges, in particular to a prestressed tensioning reinforcement method for juxtaposing T-beams in transverse connection. Background technique [0002] Juxtaposed T-beams are often used as the stressed members of the superstructure in railway bridge structures. The factory-fabricated and standardized T-beams are hoisted to form a whole through the horizontal connections of the T-beams to uniformly bear the force, thereby providing lateral bending and overall torsional stiffness. . According to the current "Code for the Design of Concrete Structures of Railway Bridges and Culverts (TB10092-2017)", the T-beam structure is mandatory, and prestress must be applied to the diaphragm beams to connect the T-beams as a whole. [0003] However, before the implementation of the current code, the horizontal connection of railway juxtaposed T-beams was not mandatory ...

AI Technical Summary

Problems solved by technology

[0005] (1) The prestressed tensioning of the finish-rolled rebar requires a hydraulic jack, and the required tensioning equipment is relatively large;

[0006] (2) The anchorage end of the finish-rolled rebar will generate large local stress on the web, which may easily lead to local cracking of the web;

[0007] (3) The ultimate stress of the finish-rolled rebar is relatively small compared with the steel strand, so it cannot provide a large prestress;

[0008] (4) Finish-rolled rebar is prone to rust and corrosion, and its durability is relatively poor, so it needs to be painted regularly for protection;

[0009] (5) Finish-rolled rebar is heavy and inconvenient for transportation and construction;

[0010] (6) The tension force of the finished-rolled rebar cannot be accurately controlled. Although the tension force can be read through the tension jack, the error is relatively large

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