CN202925924U

CN202925924U - Combination reinforcing device for brick pillar

Info

Publication number: CN202925924U
Application number: CN 201220576453
Authority: CN
Inventors: 邓明科; 梁兴文; 樊鑫淼; 祁云麟
Original assignee: Xian University of Architecture and Technology
Current assignee: Xian University of Architecture and Technology
Priority date: 2012-11-04
Filing date: 2012-11-04
Publication date: 2013-05-08
Anticipated expiration: 2022-11-04

Abstract

The utility model discloses a combination reinforcing device for a brick pillar, which aims at solving the problems that the existing common brick pillar is poor in fragility, seismic performance and integrity. The device comprises a plurality of short steel bars, a plurality of steel bands, chamfered angle steels and a high-ductility fiber concrete surface layer, wherein the short steel bars are implanted into vertical mortar joints on the surface of the brick pillar; the steel bands are mounted in the brick pillar height direction; the chamfered angle steels are pasted at four corners of the brick pillar; a plurality of steel band hoops are located on the outer sides of the angle steels; the surface of the brick pillar is coated with the high-ductility fiber concrete surface layer; the steel bands are circumferentially enclosed around the brick pillar to form the steel band hoops; and the brick pillar, the steel band hoops, the angle steels and all the short steel bars are wrapped by the high-ductility fiber concrete surface layer. Compared with the traditional brick pillar, the brick pillar reinforced by the device is higher in pressure bearing capacity, shearing performance and seismic performance, and does not generate brittle failure easily.

Description

A kind of composite reinforcement device of brick post

Technical field

The utility model belongs to building structure aseismatic and reinforcing technique field, is specially a kind of composite reinforcement device of the brick post for masonry structure.

Background technology

The brick post is one of most important supporting member in brick masonry structure, bears the vertical load that superstructure and beam transmit, and also bears simultaneously part or all of horizontal loading, and its anti-seismic performance has considerable influence to the safety of masonry structure.The reason such as due to current specifications, the change of function is used in brick masonry structure requirements for fortification against earthquake raising, building and structure erosion is impaired all may cause the bearing capacity of common brick post not meet the demands.To sum up, existing common brick post has the shortcoming of fragility, cracking resistance and poor seismic behavior.

At present, the common technology of the brick post being reinforced mainly contains coagulation fortifield village's cover reinforcing method and reinforced with external steel encased, CFRP Sheet Strengthening Method etc.Wherein, the on-the-spot support template of coagulation fortifield village's cover reinforcing method needs, construction is complicated, long in time limit, and occupied ground is larger; Reinforced with external steel encased adopts welding batten plate connecting angle, and batten plate is less to the effect of contraction of brick post, and is not obvious to the stress performance raising of reinforcing rear brick post, and need to carry out preservative treatment to angle steel and batten plate exposed surface, and reinforcement cost is higher; The carbon fiber that CFRP Sheet Strengthening Method adopts is fragile material, has tensile property relatively poor, the shortcoming such as substantially can't repair after damage.

In addition, ZL201010575642.6 discloses column reinforcing method in a kind of building, specifically disclose and adopt some steel strap coupled columns to reinforce, when adopting the method that the brick post is reinforced, because Investigation into Compressive Performance of Brick Masonry is low and deformability is relatively poor, cause globality and the less stable of brick post; And the contact site of brick post and prestress steel strap is local crushing easily, causes the prestressing force steel band to lose efficacy; In addition, the steel strap tensile strength of using in method is as more than 800MPa, and when being used for reinforcing the brick post, the lateral deformation before the brick post destroys is less, and the intensity of steel strap all can not effectively play a role.

Summary of the invention

For defective or the deficiency that prior art exists, the purpose of this utility model is, provide a kind of construct simple, cost is lower and the composite reinforcement device of constitutionally stable brick post.

For this reason, the composite reinforcement device of the brick post that provides of the utility model comprises: be implanted in some bar dowels in brick post perpends; Along some steel bands of brick post short transverse installation and the high ductility fibrous concrete surface layer that is coated in the brick outer surface of column; Described each steel band forms steel strap around brick post circumferential closure; Described high ductility fibrous concrete surface layer coats brick post, steel strap and all bar dowels.

Bracing means of the present utility model also has following technical characterictic:

Above-mentioned bracing means further comprises the angle steel that sticks on the process chamfering of four jiaos, brick post along the short transverse of brick post, and described some steel straps all are positioned at the outside of angle steel.

Preferably, level interval and longitudinal pitch between adjacent bar dowel are 300mm, and the diameter of each bar dowel is 10～12mm.

Preferably, the spacing between the adjacent steel strap is 200～400mm, and utilizes pneumatic packaging machine to install and forever seal fixedly steel strap with fastener for bundling articles.

Preferably, the thickness of above-mentioned high ductility fibrous concrete surface layer is 10～30mm.

Bracing means of the present utility model adopts high ductility fibrous concrete surface layer to reinforce the brick post, utilizes the high ductility fibrous concrete of higher-strength and toughness to brick post parcel, improves globality and the anti-seismic performance of brick post.

Compared with prior art, the utlity model has following characteristics:

(1) this device is implanted into bar dowel in brick post perpends, and both convenient construction, can strengthen again the adhesive property between brick post and high ductility fibrous concrete surface layer, guarantees brick post and surface layer co-operation.

(2) more than the high ductility fibrous concrete compressive strength of this device employing can reach 60MPa, ultimate tensile strength can reach more than 100 times of ordinary concrete, plastic deformation ability with similar steel, and good adhesive property is arranged between brickwork, is a kind of ecological architectural material with high strength, high ductility, high-durability and high damnification resistant ability.

(3) this bracing means adopts low intensive prestressing force steel band, further increases substantially bearing capacity and the anti-seismic performance of brick post.

Description of drawings

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is the ruggedized construction schematic diagram of the brick post in embodiment 1;

Fig. 2 is that the A-A of Fig. 1 is to sectional view;

Each coded representation in figure: 1-brick post, 2-bar dowel, the high ductility fibrous concrete of 3-surface layer, 4-steel strap, 5-angle steel, 6-fastener for bundling articles.

The specific embodiment

Embodiment 1:

With reference to illustrated in figures 1 and 2, the fired common brick piece in the present embodiment is of a size of 240mm * 115mm * 53mm; The brick column cross-section size is 370mm * 370mm, the high 3m of post; The bracing means of the reinforcing brick post that the present embodiment provides comprises 36 bar dowels 2 that are implanted in brick post 1 perpends; Along the short transverse of brick post 1, at four jiaos of angle steel 5 that are respectively arranged with through chamfering of brick post 1; Be installed on 9 steel straps 4 on brick post 1, adjacent steel strap 4 interval 300mm along brick post 1 short transverse; And the high ductility fibrous concrete surface layer 3 that is coated in brick post 1 external surface, its thickness is 20mm, described high ductility fibrous concrete surface layer 3 coats brick post 1, all bar dowels 2, angle steel 5 and all steel straps 4.

Wherein, it is that 10mm, length are 120mm that the present embodiment bar dowel 2 adopts HRB400 grade reinforcing steel, diameter, the outstanding surperficial 20mm of brick post 1, and longitudinal pitch and horizontal spacing that adjacent bar dowel is 2 are 300mm; The material of steel strap 4 can be selected cold rolling carbon element steel band, blue steel strip or galvanized steel strip, and the present embodiment is selected cold rolling carbon element steel band, its intensity more than 270MPa, thick 1mm, wide 25mm; Angle steel 5 materials select common Q 235 hot-rolled steel sections, angle steel 5 to be of a size of

40 * 3, for avoiding bight steel band fracture, angle steel 5 chamfer radius are 10mm; The component of high ductility fibrous concrete is cement, flyash, silicon ash, sand, PVA fiber, water reducing agent and water, wherein, by mass percentage, cement: flyash: silicon ash: sand: water=1:0.9:0.1:0.76:0.58; Cumulative volume after mixing take cement, flyash, silicon ash, Sha Heshui is as radix, and the volume volume of PVA fiber is 1.5%; The addition of water reducing agent is 0.8% of cement, flyash and silicon ash gross mass.Wherein: the maximum particle diameter of sand is 1.26mm; The PVA fiber is the PA600 fiber type that Shanghai Luo Yang Science and Technology Ltd. produces, and length is 8mm, and diameter is 26 μ m, and tensile strength is 1200MPa, and modulus of elasticity is 30GPa; Cement is the P.O.52.5R portland cement; Flyash is I level flyash; The loss on ignition of silicon ash used is 5%, and dioxide-containing silica is 88%, and specific area is 18000m2/kg; Water reducing agent be water-reducing rate at the high-efficiency water-reducing agent of poly-carboxylic acid more than 30%, polycarboxylate water-reducer is that Jiangsu Botexin Materials Co., Ltd produces

The type high performance water reducing agent of polyocarboxy acid.

The bracing means of this embodiment is undertaken by following construction sequence:

At first, implant bar dowel in the perpends on brick post surface; Level interval between adjacent bar dowel and longitudinal pitch are 300mm;

Then, four jiaos at the brick post adopt high ductility fibrous concrete to paste the angle steel of process chamfering along brick post short transverse;

Then, utilizing pneumatic packaging machine is the steel strap of 300mm at angle steel outside colligation installing space, seals with fastener for bundling articles simultaneously and fixing steel strap; When the colligation steel strap, adjust given its atmospheric pressure value of baling press, making the steel band tension stress is 30～60% of steel band ultimate tensile strength;

At last, smear high ductility fibrous concrete surface layer on brick post surface, this high ductility fibrous concrete surface layer coats brick post, bar dowel, angle steel and stirrup.

The brick post that this device is reinforced can be used for classroom building of elementary and middle schools brick corridor post, brick wall buttress, single-storey factory building bearing bricks post.

Claims

1. the composite reinforcement device of a brick post, is characterized in that, comprising: be implanted in the some bar dowels (2) in brick post (1) perpends; Along some steel bands of brick post short transverse installation, and each steel band forms steel strap (4) around brick post circumferential closure; And the high ductility fibrous concrete surface layer (3) that is coated in brick post (1) external surface; Described high ductility fibrous concrete surface layer (3) coats brick post (1), all steel straps (4) and all bar dowels (2).

2. the composite reinforcement device of brick post as claimed in claim 1, it is characterized in that, described bracing means further comprises the angle steel (5) that sticks on the process chamfering of four jiaos, brick post along the short transverse of brick post (1), and described some steel straps (4) all are positioned at the outside of angle steel (5).

3. the composite reinforcement device of brick post as claimed in claim 1, is characterized in that, level interval and longitudinal pitch between the adjacent bar dowel (2) in described some bar dowels (2) are 300mm, and the diameter of each bar dowel (2) is 10～12mm.

4. the composite reinforcement device of brick post as claimed in claim 1, is characterized in that, the spacing between adjacent steel strap (4) is 200～400mm, and utilize pneumatic packaging machine to install, also use fixedly steel strap (4) of the permanent sealing of fastener for bundling articles (6).

5. the composite reinforcement device of brick post as claimed in claim 1, is characterized in that, the thickness of above-mentioned high ductility fibrous concrete surface layer (3) is 10～30mm.