CN202925926U

CN202925926U - Reinforcing device for brick pillar

Info

Publication number: CN202925926U
Application number: CN 201220578836
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 reinforcing device for a brick pillar, which aims at solving the problems that the existing reinforcing device for the brick pillar is long in construction cycle and poor in reinforcing effect. The reinforcing device comprises a plurality of short steel bars 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 surface of the brick pillar is coated with the high-ductility fiber concrete surface layer; and the brick pillar and all the short steel bars are wrapped by the high-ductility fiber concrete surface layer. The reinforcing device adopts the mechanical property disadvantage of high-ductility fiber concrete and the good viscosity performance between the high-ductility fiber concrete and the brick pillar, so that the integrity and anti-seismic performance of the brick pillar are improved.

Description

A kind of brick post bracing means

Technical field

The utility model belongs to building structure aseismatic and reinforcing technique field, is specially a kind of brick post bracing means 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.Set up defences and require to improve, use Functional change and the reason such as structure erosion is impaired due to Antiseismic building, all may cause the bearing capacity of brick post not meet the demands, therefore need bearing capacity and anti-seismic performance by effective reinforcement measure raising brick post.

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.

Summary of the invention

For defective or the deficiency that prior art exists, the purpose of this utility model is, provide a kind of construction simply, cost is lower and constitutionally stable brick post bracing means.

For this reason, the brick post bracing means that provides of the utility model comprises: be implanted in some bar dowels in brick post perpends; And the high ductility fibrous concrete surface layer that is coated in the brick outer surface of column; Described high ductility fibrous concrete surface layer coats brick post and all bar dowels.

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

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

Bracing means of the present utility model adopts the high ductility fibrous concrete of high strength and toughness to brick post parcel, improves the globality of brick post, increases substantially 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.Can effectively avoid the local crushing of brick post, significantly improve globality and the anti-seismic performance of brick post.

(3) the brick post reinforced of this device has good durability, but increases substantially bearing capacity and the anti-seismic performance of existing brick post the application life of extending structure, reduces and even removes the work of repairing after macroseism from.

Description of drawings

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

Fig. 1 is the bracing means structural representation of the brick post in embodiment 1;

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

Fig. 3 is to the ruggedized construction schematic diagram of brick post in embodiment 2;

Fig. 4 is that the B-B of Fig. 3 is to sectional view;

Each coded representation in figure: 1-brick post, 2-bar dowel, the high ductility fibrous concrete of 3-surface layer.

The specific embodiment

Embodiment 1:

With reference to illustrated in figures 1 and 2, in the present embodiment, the fired common brick piece is of a size of 240mm * 115mm * 53mm, and brick post 1 is of a size of 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; 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 and all bar dowels 2.

Wherein, the present embodiment bar dowel 2 adopts the HRB400 grade reinforcing steel, and diameter is 12mm, and length is 120mm, outstanding brick post surface 20mm, and longitudinal pitch and horizontal spacing that adjacent bar dowel is 2 are 300mm; The component of high ductility fibrous concrete is cement, flyash, silicon ash, sand, PVA fiber, water reducing agent and water, by mass percentage, and 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 18000m ²/ 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, smear high ductility fibrous concrete surface layer on brick post surface, this high ductility fibrous concrete surface layer coats brick post and bar dowel.

Embodiment 2:

With reference to figure 3 and Fig. 4, the present embodiment difference from Example 1 is: the brick post is buttress, and the fired common brick piece is of a size of 240mm * 115mm * 53mm, is of a size of 370mm * 370mm, be highly 3m, at the high ductility fibrous concrete surface layer of brick post 1 surface uniform trowelling 25mm thickness.

This bracing means can be used for the reinforcing of classroom building of elementary and middle schools brick corridor post, brick wall buttress, single-storey factory building bearing bricks post.

Claims

1. a brick post bracing means, is characterized in that, device comprises: be implanted in the some bar dowels (2) in brick post (1) perpends; 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) and all bar dowels (2).

2. brick post bracing means 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.

3. brick post bracing means as claimed in claim 1, is characterized in that, the thickness of described high ductility fibrous concrete surface layer (3) is 10～30mm.