CN100342095C

CN100342095C - Method for reinforcing space concrete beam column node by sticking fiber cloth

Info

Publication number: CN100342095C
Application number: CNB2004100252507A
Authority: CN
Inventors: 王溥; 夏春红
Original assignee: Shanghai Building Science Research Institute Co Ltd
Current assignee: Shanghai Building Science Research Institute Co Ltd
Priority date: 2004-06-18
Filing date: 2004-06-18
Publication date: 2007-10-10
Anticipated expiration: 2024-06-18
Also published as: CN1710222A

Abstract

The present invention relates to a method for reinforcing space concrete beam column nodes by sticking fiber cloth. Firstly, the beam bottom around the core area of a beam column junction area is supplemented with plain concrete, namely concrete haunch, and a triangular concrete block is formed; then, the surfaces of the concrete block and a beam column is stuck with fiber cloth, and the concrete block is connected with a node main body; finally, the beam end and the column end are stuck with fiber cloth. The method has simple operation, and does not need large mechanical equipment according to the reinforcing method. The method has low operating space requirement and short construction period. On the basis of maintaining the integrity of the core area and enhancing the strength of the core area, the reinforcing effect can enhance the strength and increase the tensibility of the whole node. The method is suitable for the repair and the anti-shock strengthening of the node in the structure, comprising civic buildings, industrial factory buildings, bridges, elevated roads, etc.

Description

Paste the structure of fiber cloth reinforced space concrete beam and column node

Technical field

The present invention relates to the building strengthening engineering, particularly a kind of structure of pasting fiber cloth reinforced space concrete beam and column node.

Background technology

Concrete beam and column node is a part common in the building structure, see also the schematic diagram of Fig. 1, its stress more complicated, bear effects such as the moment of flexure of vertical load that post transmits, beam-ends and shearing, be a pith in the frame construction, and the intersectional region core space of the beam column most important thing especially.

When the method for adopt pasting cloth and be the sheet-form of fibre reinforced composites is reinforced the plane framework node, can paste the cloth of the different numbers of plies of different directions as required at beam, post and core space, see shown in Figure 2.

But for space nodes, crossing of decussation beam and column makes the core space concrete directly paste cloth and reinforces.Only space nodes beam-ends, styletable are reinforced and do not reinforced core space, the performance of whole node just can fundamentally not be improved so.

Summary of the invention

Task of the present invention provides a kind of structure of pasting fiber cloth reinforced space concrete beam and column node, and it has solved the problem that prior art can't be pasted directly to the core space concrete of space nodes that cloth is reinforced thereby can not be improved the whole node performance.

Technical scheme of the present invention is as follows:

A kind of structure of pasting fiber cloth reinforced space concrete beam and column node, at first augmenting plain concrete bottom the beam around beam column intersectional region core space is the concrete haunch, form the triangular concrete piece, on this concrete block and beam column surface, paste cloth then, concrete block and node main body are linked together, paste cloth at beam-ends, styletable at last.

Make bean column node of the present invention, it is simple to operate, does not need heavy mechanical equipment, and is low to the operating space requirement, and short construction period.Consolidation effect is in that to keep core space complete and improve on the core space intensity based, and whole node intensity is improved, and ductility obtains increasing.

In the low all repetition tests that adopt carbon cloth reinforced full size node, bean column node of the present invention can improve the styletable horizontal bearing capacity and be up to 30%, improves styletable horizontal movement 30%～40%.

Description of drawings

Fig. 1 is the plane node schematic diagram of building structure beam column built from concrete.

Fig. 2 pastes the schematic diagram that cloth is reinforced plane node.

Fig. 3 is that the space nodes of the fiber cloth reinforced space of stickup of the present invention concrete beam and column node structure is reinforced floor map.

Fig. 4 is another embodiment schematic perspective view that adopts bean column node structure of the present invention that space nodes is reinforced.

Fig. 5 is the another embodiment schematic diagram that adopts bean column node structure of the present invention that space nodes is reinforced.

The specific embodiment

Referring to Fig. 3 and Fig. 4, according to the structure of the fiber cloth reinforced space of stickup of the present invention concrete beam and column node, at first augmenting plain concrete at beam 1 with the intersectional region core space 3 beam bottom on every side of post 2 is the concrete haunch, forms triangular concrete piece 4.As shown in Figure 3, triangular concrete piece 4 can be arranged on plane two sides.As shown in Figure 4, triangular concrete piece 4 can be arranged on three-dimensional two sides or four sides.

On triangular concrete piece 4 and beam 1 post 2 surfaces, paste cloth then, concrete block and node main body are linked together.Paste cloth 9 at beam-ends, styletable at last.

Adopt bean column node structure of the present invention, can augment plain concrete with the intersectional region core space 3 beam top on every side of post 2 at beam 1 as required is the concrete haunch, forms triangular concrete piece (not shown).Like this, after the triangular concrete piece on beam bottom and beam top and origin node structure link together, be equivalent to enlarge the core space part, played the effect of reinforcement joint cores.

Adopt bean column node structure of the present invention, when pasting cloth, can on the hypotenuse of triangular concrete piece 4, paste oblique cloth 5, on beam 1 position, paste U-shaped cloth 6, on post 2 positions, paste circular fiber cloth 7.This reinforcement means is by pasting cloth when improving beam-ends and styletable intensity, consider intensity and the control shear strain that improves core space.

Referring to Fig. 5, can not when beam bottom or beam top haunch, can take the bean column node structure shown in the figure if be subjected to the restriction of operating space, promptly at first paste cloth in beam column intersection, paste cloth at beam-ends, styletable then.

The structure of the fiber cloth reinforced space of stickup of the present invention concrete beam and column node is applicable to reparation and the seismic hardening to node in the structures such as civic building, industrial premises, bridge, elevated road.Reinforcement material is the sheet-form in the fibre reinforced composites, i.e. cloth, and as carbon cloth, high strength glass fiber sheet, aryl fiber cloth etc., cloth can be unidirectional, also can be two-way.To apply certain rivet clasp measure to cloth after the stickup, itself and original structure are not only linked by bonding adhesive, and by mechanical connection, as adopting bolt, angle steel, fiber rivet etc., thereby prevent that cloth from peeling off to guarantee consolidation effect.

Claims

1. structure of pasting fiber cloth reinforced space concrete beam and column node, it is characterized in that, at first augmenting plain concrete bottom the beam around beam column intersectional region core space is the concrete haunch, form the triangular concrete piece, on this concrete block and beam column surface, paste cloth then, concrete block and node main body are linked together, paste cloth at beam-ends, styletable at last.

2. the structure of the fiber cloth reinforced space of stickup according to claim 1 concrete beam and column node is characterized in that, it is the concrete haunch that plain concrete is augmented on the beam top around beam column intersectional region core space, forms the triangular concrete piece.

3. the structure of the fiber cloth reinforced space of stickup according to claim 1 and 2 concrete beam and column node is characterized in that, pastes oblique cloth on the hypotenuse of triangular concrete piece.

4. the structure of the fiber cloth reinforced space of stickup according to claim 1 and 2 concrete beam and column node is characterized in that, pastes the U-shaped cloth on the beam position.

5. the structure of the fiber cloth reinforced space of stickup according to claim 1 and 2 concrete beam and column node is characterized in that, pastes circular fiber cloth on the post position.