A method for strengthening the structure of the pc frame with energy-dissipating columns attached to and outsourced with steel connections

Abstract

The invention provides a method for reinforcing an exterior PC framework structure with an energy consumption post and connected through packing steel. Strength and ductility of the structure can be improved, the anti-seismic property and safety of the structure are improved, an original structure is not damaged, and construction is convenient to carry out. The framework comprises a newly added PC beam, newly added reinforced concrete columns and the energy consumption post, wherein the newly added reinforced concrete columns are connected with original reinforced concrete columns through the packing steel, outward-packed steel plate concrete is connected through adhesive glue, the newly added reinforced concrete columns and the original reinforced concrete columns are packed through steel plates from the lower end of the beam, an original reinforced concrete beam is connected with the newly added PC beam in a bolt pre-tightening mode, a hole is reserved in the newly added PC beam, the original reinforced concrete beam needs to be punched so that a bolt can penetrate through holes, and the energy consumption post comprises a ductility post body and rigidity supporting bases at two ends. The energy consumption post can be cast on the newly added PC beam on site and also can be connected with the newly added PC beam through assembling; the newly added PC beam is connected with the newly added reinforced concrete columns through prestressed tendons, and the holes are reserved so that the prestressed tendons can penetrate.

Description

technical field [0001] The invention belongs to the technical field of reinforcement, and in particular relates to a method for reinforcing a PC frame of an energy-dissipating column with an externally attached and externally clad steel connection belt. Background technique [0002] At present, many buildings have hidden safety hazards, such as exceeding the design service life, hidden dangers in design and construction, and revisions of new seismic codes, which make many buildings unable to meet the requirements of safety, applicability, and durability, and have been identified as C-level or D-level must be strengthened. Currently applied reinforcement techniques include section enlargement method, energy dissipation and shock absorption method, and prestressed reinforcement method, but all of them have certain defects. The increased cross-section method has a large workload on site and has a great impact on production and life, which will affect the appearance and headroo...

AI Technical Summary

Problems solved by technology

The increased cross-section method has a large workload on site, which has a great impact on production and life, and will affect the appearance and headroom of the structure; the energy dissipation and shock absorption method will block windows and affect lighting; the prestressed reinforcement method will have a certain impact on the appearance of the original structure after reinforcement , and it is not suitable for structures with large shrinkage and creep of concrete. In addition, it is necessary to pay attention to the anti-corrosion of prestressed steel bars after reinforcement

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