A method for strengthening an existing building with a peripheral assembled substructure
A technology for existing buildings and buildings, which is applied in the direction of building construction, construction, building maintenance, etc., to achieve the effects of earthquake resistance, improved earthquake resistance, and reduced negative environmental impacts
Inactive Publication Date: 2016-07-06
BEIJING UNIV OF TECH
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Problems solved by technology
The connection between the newly added prefabricated frame beam and the newly added prefabricated frame column, the newly added prefabricated reinforced concrete frame, and the connection between the newly added prefabricated floor slab and the original frame beam are all completed through the assembly of unbonded prestressed tendons, which not only exerts the prefabricated structure Advantages, and solve the problem of prefabricated structure connection, can be widely used in the field of seismic reinforcement of concrete structures
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[0016] The first step: According to the requirements of "Code for Design of Concrete Structures" (GB50010-2010) and "Code for Seismic Design of Buildings" (GB50011-2010), combined with the newly added prefabricated reinforced concrete frame 9, the newly added prefabricated floor slab 12 and the buildings to be reinforced The principle of easy assembly of the original outer reinforced concrete frame 1 determines the section size, reinforcement amount, and concrete grade of the newly added prefabricated frame beams 10, the newly added prefabricated frame columns 11, and the newly added prefabricated floor slabs 12. The newly added prefabricated frame beams 10 and the newly added prefabricated frame columns 11 are reserved for unbonded prestressed rib channels; the newly added prefabricated frame beams 10 and the newly added prefabricated floor slabs 12 are reserved for a row of non-bonded prefabricated beams every 500-1000mm along the span direction. Bonding of prestressed tendon...
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The invention discloses a method for reinforcing an existing structure by pre-stress assembled precast reinforced concrete frames, and belongs to the field of seismic strengthening of reinforced concrete structures in civil engineering. Reinforced concrete original frames to be reinforced are integrally connected and assembled with newly increased precast reinforced concrete frames for reinforcing through unbonded pre-stressed tendons; reinforced bars at newly increased precast frame beams, newly increased precast frame column joints, upper newly increased precast frame column joints and lower newly increased precast frame column joints are bound into a whole by concreting; gaps are reserved among the newly increased precast reinforced concrete frames and the reinforced concrete original frames and sealed by the aid of mortar; ducts are reserved in the newly increased precast frame beams and newly increased precast frame columns and formed in corresponding positions of original frame beams, original frame columns and the newly increased precast reinforced concrete frames by drilling holes; the unbonded pre-stressed tendons penetrate the ducts, are tensioned and are anchored by the aid of anchors. The seismic capacity of the structure reinforced by the method is improved by 1-2 times.
Description
technical field [0001] A method for reinforcing an existing building with an externally assembled substructure is to add a prefabricated reinforced concrete frame outside the building to be reinforced, and the two are connected and assembled into a whole by adding a prefabricated floor slab. The newly added prefabricated reinforced concrete frame shares the horizontal seismic force of the original building and plays a role in strengthening and protecting the original building, which belongs to the field of seismic reinforcement of reinforced concrete structures in civil engineering. Background technique [0002] In my country, reinforced concrete frame structure and bottom frame structure are widely used due to their convenience and flexibility in use. The reinforced concrete frame structure and the bottom frame structure have different structural arrangements due to different functions, and it is easy to form a structural system with uneven rigidity and rigid upper and lowe...
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IPC IPC(8): E04G23/02E04B1/98
Inventor 李振宝陈磊刘春阳解咏平高宇马华
Owner BEIJING UNIV OF TECH