CN103541496A

CN103541496A - Self-compaction recycled concrete deep beam with built-in FRP (fiber reinforced plastic) rib net

Info

Publication number: CN103541496A
Application number: CN201310445843.8A
Authority: CN
Inventors: 刘华新; 孙英明; 刘蓓蓓; 柳亚男; 王学志
Original assignee: Liaoning University of Technology
Current assignee: Liaoning University of Technology
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2014-01-29
Anticipated expiration: 2033-09-27
Also published as: CN103541496B

Abstract

The invention relates to a self-compaction recycled concrete deep beam with a built-in FRP (fiber reinforced plastic) rib net. The self-compaction recycled concrete deep beam with the built-in FRP rib net comprises a beam foundation formed by self-compaction recycled concrete and is characterized in that chopped fibers are uniformly distributed in the beam foundation, the FRP rib net is arranged at a longitudinal middle position of the beam foundation, and FRP construction ribs and FRP tension ribs are arranged along the longitudinal direction at the upper end and the lower end of the beam foundation. The self-compaction recycled concrete deep beam with the built-in FRP rib net has the advantages that a renewable energy source, namely treated construction waste, can be taken as coarse aggregate for producing recycled concrete; distribution bars of the deep beam adopt a novel reinforcement manner, and FRP ribs have the characteristics of light weight, high strength, corrosion resistance, fatigue resistance and easiness in construction and are widely applied in the industries of building, bridge and the like; the self-compaction recycled concrete deep beam with the built-in FRP rib net can have a good using function while strength is not reduced, and resource is saved; geometric dimension of the deep beam in practical engineering application is large, so that self-compaction recycled concrete is adopted for guaranteeing pouring quality of concrete; the chopped fibers are doped, so that crack resistance and durability of the recycled concrete deep beam are improved.

Description

Built-in FRP muscle net self-compaction regeneration concrete deep beam

Technical field

The present invention relates to a kind of for building, the built-in FRP muscle net self-compaction regeneration concrete deep beam of bridge, harbour and hydraulic engineering etc.

Background technology

Ordinary reinforced concrete deep beam refers to that span-depth radio is not more than 2 freely-supported single beam or span-depth radio and is not more than 2.5 freely-supported continuous beam on many supports.Reinforced concrete deep beam is widely used in high building structure, ocean structure, bridge and complex foundation Foundation Design.Generally, the ultimate strength of deep beam is to be controlled rather than controlled by bending failure by shear failure.In use easily there is diagonal cracking, brittle fracture in reinforced concrete deep beam, is particularly exposed to plain bars easy-to-rust and aging under severe natural environment, causes the use function of structural element to reduce, and can not meet the related request of standard.

Summary of the invention

The present invention is the problems referred to above that will solve existing existence, provides a kind of and make full use of regenerative resource, improves the built-in FRP muscle net self-compaction regeneration concrete deep beam of regeneration concrete deep beam cracking resistance ability, endurance quality and ductile performance.

The built-in FRP muscle net self-compaction regeneration concrete deep beam the present invention relates to, comprise the beam basis 3 being formed by self-compaction regeneration concrete, in beam basis 3, be evenly equipped with chopped strand 2, in 3 longitudinal centre positions, beam basis, FRP muscle net 1 is set, in 3 top and bottom, beam basis, is longitudinally positioned at FRP muscle net 1 both sides and arranges respectively that FRP constructs muscle 4 and FRP is subject to lacing wire 5.

Net spacing≤the 200mm of FRP muscle net 1.

The net spacing of FRP muscle net 1 is 150mm-200mm.

The volume fraction of chopped strand 2 is 0.2%-0.4%.

The invention has the beneficial effects as follows:

(1) making full use of regenerative resource utilizes building waste after treatment to produce regeneration concrete as coarse aggregate.

(2) distribution bar of deep beam adopts novel reinforcement manner---and individual layer is built-in and adopt FRP muscle; Reinforcement adopts FRP muscle, end to adopt anchor measure reliably; That FRP muscle has is lightweight, intensity is high, corrosion-resistant, endurance, be easy to the good performances such as construction, in industries such as building, bridges, is used widely.In the situation that this regeneration concrete deep beam can guaranteed strength reduce, there is good use function and saving resource.

(3) because the deep beam physical dimension of practical engineering application is larger, in order to guarantee that concrete pouring quality adopts self-compaction regeneration concrete.

(4) mix chopped strand, improved regeneration concrete deep beam cracking resistance ability, endurance quality etc.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1.

In figure: 1-FRP muscle net, 2-chopped strand, 3-beam basis, 4-FRP constructs muscle, and 5-FRP is subject to lacing wire.

The specific embodiment

Embodiment 1

As shown in the figure, the physical dimension of this self-compaction regeneration concrete deep beam designs according to current specifications.This self-compaction regeneration concrete deep beam comprises the beam basis 3 of being made by self-compaction regeneration concrete, in beam basis 3, be evenly equipped with volume fraction and be 0.3% chopped strand 2, in 3 longitudinal centre positions, beam basis, FRP muscle net 1 is set, FRP muscle net 1 is furnished with the net spacing≤200mm of longitudinal FRP muscle and horizontal FRP muscle and FRP muscle net 1, and the present embodiment is 150mm.In 3 top and bottom, beam basis, be longitudinally positioned at that FRP muscle net 1 both sides arrange respectively FRP structure muscle 4 and FRP is subject to lacing wire 5.

During construction, first FRP muscle net 1 colligation of being furnished with longitudinal FRP muscle and horizontal FRP muscle is good, then be subject to lacing wire 5 to be fixed on corresponding position in FRP structure muscle 4 and FRP, finally the self-compaction regeneration concrete 3 that is mixed with chopped strand 2 being cast in together, is that self-compacting concrete can form this deep beam without vibrating due to what adopt.

Embodiment 2

The net spacing of described FRP muscle net 1 is 200mm, and the volume fraction of chopped strand 2 is 0.4%, the other the same as in Example 1.

Embodiment 3

The net spacing of described FRP muscle net 1 is 170mm, and the volume fraction of chopped strand 2 is 0.2%, the other the same as in Example 1.

Claims

1. a built-in FRP muscle net self-compaction regeneration concrete deep beam, comprise the beam basis being formed by self-compaction regeneration concrete, it is characterized in that: beam is evenly equipped with chopped strand in basis, on beam basis, longitudinally centre position arranges FRP muscle net, is longitudinally positioned at that FRP muscle net both sides arrange respectively FRP structure muscle and FRP is subject to lacing wire in top and bottom, beam basis.

2. built-in FRP muscle net self-compaction regeneration concrete deep beam according to claim 1, is characterized in that: the net spacing≤200mm of FRP muscle net.

3. built-in FRP muscle net self-compaction regeneration concrete deep beam according to claim 2, is characterized in that: the net spacing of FRP muscle net is 150mm-200mm.

4. built-in FRP muscle net self-compaction regeneration concrete deep beam according to claim 1, is characterized in that: the volume fraction of chopped strand is 0.2%-0.4%.