CN110607878A - T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method - Google Patents

T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method Download PDF

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Publication number
CN110607878A
CN110607878A CN201910997100.9A CN201910997100A CN110607878A CN 110607878 A CN110607878 A CN 110607878A CN 201910997100 A CN201910997100 A CN 201910997100A CN 110607878 A CN110607878 A CN 110607878A
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CN
China
Prior art keywords
shaped
recycled concrete
steel pipe
concrete
framework
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CN201910997100.9A
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Chinese (zh)
Inventor
牛海成
张向冈
王兴国
丁亚红
陈旭
杨健辉
王彦伟
王文唱
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Henan University of Technology
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Henan University of Technology
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Priority to CN201910997100.9A priority Critical patent/CN110607878A/en
Publication of CN110607878A publication Critical patent/CN110607878A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/32Columns; Pillars; Struts of metal
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/30Columns; Pillars; Struts
    • E04C3/34Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings

Abstract

The invention discloses a T-shaped steel tube recycled concrete special-shaped column with an open T-shaped rib and a manufacturing method thereof, wherein the special-shaped column comprises a T-shaped steel tube framework, a T-shaped rib framework, a reinforcing hoop framework and fully recycled concrete; the T-shaped steel pipe framework is formed by welding a plurality of steel plates; the T-shaped rib framework is formed by welding two steel plates, a web plate is provided with a hole, and the T-shaped ribs with the holes are welded with the inner wall of the T-shaped steel pipe in a parallel or staggered mode; the reinforcing hoop framework is a reinforcement cage formed by binding spiral stirrups and longitudinal reinforcements; the coarse aggregate of the fully recycled concrete is completely derived from waste concrete. In the scheme, the T-shaped steel pipe and the reinforcing hoop can improve the bearing capacity of the fully recycled concrete and promote the recycling range of the waste concrete; the perforated T-shaped ribs can improve the bonding property of the steel pipe and the fully recycled concrete and delay the local buckling of the steel pipe; meanwhile, the scheme can be prefabricated in a factory, a template is not needed in site construction, and the production efficiency and the quality of the fully recycled concrete are improved.

Description

T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method
Technical Field
The invention relates to a building component, in particular to a T-shaped steel pipe concrete special-shaped column adopting fully recycled concrete and perforated T-shaped ribs, and belongs to the technical field of steel and concrete combined structures.
Background
With the rapid development of urban construction in China, a large amount of construction waste is generated by the reinforcement and repair of the existing buildings, the continuous development and large-scale construction of new urban areas and residential quarters and the new construction of municipal utilities. In addition, China has a large number of building structures which are dismantled each year because the design service life is reached. According to statistics, the construction area for each year of China to be demolished is about 4.6 hundred million square meters, and every ten thousand square meters of demolition projects can generate 7000 tons to 12000 tons of construction wastes. However, most of the construction wastes are mainly treated by backfilling, burying and open-air stacking, and a huge amount of construction expenses such as land collection fees, garbage clearing and transporting fees and the like are consumed. Meanwhile, a large amount of construction waste is randomly stacked, so that the land is occupied, the environment is polluted, and the air quality is directly or indirectly influenced. The construction waste aggravates the shortage of urban land and resources in China, and seriously influences the coordinated development of social economy and ecological environment.
At the same time, the demand for concrete is still increasing. According to statistics, the concrete consumption is about 20 billion cubic meters in the last five years, the mining consumption of the natural aggregate is about 40 billion tons, and a large amount of natural sandstone aggregate is gradually exhausted due to continuous mining, so that ecological damage is caused. Therefore, the research on recycling of waste concrete is urgent and has great significance.
At present, the domestic high-rise and super high-rise buildings are rapidly developed, and the steel pipe concrete column is a combined structure form which combines the advantages of a steel pipe structure and a concrete structure into a whole. Meanwhile, the special-shaped column structure system avoids the problems that indoor columns of common frame columns are protruded and occupy building space, improves building appearance, and brings flexibility and convenience for building design and use functions. The recycled concrete is poured into the steel tube special-shaped column to form the steel tube recycled concrete special-shaped column, the stress performance of the recycled concrete can be obviously improved due to the constraint effect of the external steel tube on the internal recycled concrete, and the application and popularization of the recycled concrete are promoted; meanwhile, compared with a reinforced concrete special-shaped column, the structural system has the characteristics of simple and convenient construction, template saving and excellent bearing capacity and shock resistance.
However, because the column mainly bears axial pressure, when the steel pipe concrete special-shaped column reaches the ultimate bearing capacity, the steel pipe at the corner part is subjected to plastic deformation, and the steel pipe in the middle of each limb of the special-shaped column is easy to peel off from the concrete or generate local instability. The research shows that: the main reason for the above technical problems is insufficient binding force of the outer steel pipe to the core concrete. In the actual application at the present stage, in order to make up for the defect that the steel pipe has insufficient constraint capacity on the core concrete, the construction measures such as welding studs or rectangular rib plates on the inner wall of the steel pipe are mainly adopted, so that the labor amount is large and the effect is not ideal.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems that a large amount of construction wastes are required to be treated urgently, natural resources are excessively exploited and the defects of the existing special-shaped column technology exist, one purpose is to provide a T-shaped steel tube recycled concrete special-shaped column with an open hole and T-shaped ribs, which has high bearing capacity, strong cooperative working performance and good stability and can efficiently realize the resource utilization of construction wastes, and the further purpose is to provide a manufacturing and construction method of the T-shaped steel tube recycled concrete special-shaped column with the open hole and the T-shaped ribs.
The technical scheme is as follows: a T-shaped steel tube recycled concrete special-shaped column with an open T-shaped rib comprises a T-shaped steel tube framework, a T-shaped rib framework, a reinforcing hoop framework and fully recycled concrete; the T-shaped steel tube framework is formed by welding steel plates; the T-shaped rib framework is formed by welding two steel plates, a web plate is provided with a hole, and the T-shaped ribs with the holes are welded with the inner wall of the T-shaped steel pipe in a parallel or staggered mode; the reinforcing hoop framework is a reinforcement cage formed by binding spiral stirrups and longitudinal reinforcements; the coarse aggregate in the fully recycled concrete is completely derived from waste concrete.
According to the scheme, holes are uniformly and equidistantly formed in the web plate of the perforated T-shaped rib, the holes are circular or regular hexagonal, the hole centers are located on the same vertical line, and the distance between every two adjacent holes is 100-300 mm.
As a further optimization of the scheme, the reinforcing hoop framework is arranged at the intersection of the longitudinal and transverse column limbs. The distance d between the spiral stirrups is 40 mm-80 mm, and the diameter is 8 mm-12 mm; the longitudinal bars are evenly distributed with 6 bars along the circumference of the reinforcing hoop, the diameter of the longitudinal bars is 6 mm-10 mm, and the diameter of the longitudinal bars is smaller than that of the spiral hoops.
As the further optimization of the scheme, the strength grade of the fully recycled concrete is C30, and the strength grade of the waste concrete is not lower than C25; the mixing proportion of the fully recycled concrete is, by weight: cement: sand: and (3) regenerating coarse aggregate: fly ash: water reducing agent = 1:1.60:1.87:4.17:0.32: 0.01.
Further, the invention provides a method for manufacturing and constructing the T-shaped steel tube recycled concrete special-shaped column with the perforated T-shaped rib, which comprises the following steps:
step 1, intercepting all component steel plates of the T-shaped steel pipe in a processing plant according to the size requirement, then forming holes on a web plate of a T-shaped rib according to the requirement, welding the T-shaped rib with the steel plates according to a certain interval, and finally welding all the steel plates to form a T-shaped steel pipe special-shaped column;
step 2, manufacturing the reinforcing steel bars into a spiral shape in a processing plant, and uniformly binding longitudinal bars along the circumference according to the distance between the stirrups to form a reinforcing hoop framework;
step 3, transporting the processed T-shaped steel pipe special-shaped column and the reinforcing hoop to a construction site, positioning and installing the reinforcing hoop, and hoisting the T-shaped steel pipe special-shaped column to a preset position;
and 4, preparing and pouring fully-recycled commercial concrete according to the design mixing ratio, and forming the T-shaped steel tube recycled concrete special-shaped column with the perforated T-shaped ribs after natural curing for 28 days.
Has the advantages that:
(1) compared with the reinforced concrete special-shaped column, the steel tube recycled concrete special-shaped column does not need a template, is simple and convenient to construct, and has higher bearing capacity and good plastic deformation capacity; meanwhile, the reinforcing hoops are arranged at the intersection of the longitudinal and transverse column limbs, so that the bearing capacity and the transverse deformation performance of corresponding fully recycled concrete can be effectively improved, and the excellent mechanical properties of the steel tube recycled concrete special-shaped column can be fully exerted;
(2) the holes which are arranged at equal intervals are formed in the T-shaped rib web plate with the vertical hole, after the whole recycled concrete is poured, the whole recycled concrete on two side surfaces of the T-shaped rib web plate can play a role in shearing resistance, the whole recycled concrete filled in the holes is equivalent to pins which are vertically distributed and inserted into the holes, and meanwhile, the flange of the T-shaped rib effectively limits the separation of the inner wall of the steel pipe from the whole recycled concrete. The web, the flange and the fully recycled concrete work in a cooperative mode, the problem that the adhesive force between a steel pipe and concrete is insufficient in the existing steel pipe concrete is greatly improved, meanwhile, the local buckling of the steel pipe is effectively delayed, and the overall working performance of the steel pipe recycled concrete special-shaped column is improved. (ii) a
(3) The fully recycled concrete saves resources, protects the ecological environment and reduces the land occupied by waste concrete landfill; meanwhile, the fully recycled concrete is applied to the field of steel and concrete combined structures, so that the recycling range of the waste concrete is increased, and the method has important and profound significance for the efficient resource utilization of construction waste;
(4) the adopted T-shaped steel pipe special-shaped column and the reinforcing hoop are processed and manufactured in a steel structure factory, so that mechanical batch production can be realized, the production efficiency is high, the construction period is greatly saved, and the engineering cost is reduced; meanwhile, the fully recycled concrete is selected and prepared in a commercial concrete mixing plant, the quality of the recycled aggregate is easily ensured, and the quality and the production efficiency of the fully recycled concrete can be greatly improved.
Drawings
FIG. 1 is a schematic plan view of a T-shaped steel pipe recycled concrete profiled pole with an open-celled T-shaped rib according to example 1;
FIG. 2 is a schematic plan view of a T-shaped steel pipe recycled concrete profiled pole with an open hole T-shaped rib in example 2;
FIG. 3 is a perspective view of a T-shaped rib with a circular opening;
FIG. 4 is a perspective view of a T-shaped rib with a regular hexagonal hole;
FIG. 5 is a schematic perspective view of the reinforcing band of example 1 ~ 2;
FIG. 6 is a schematic view of a circular hole cut in a web of a T-shaped rib;
FIG. 7 is a schematic view of a perforated web after T-rib formation;
FIG. 8 is a schematic view of a cut of a regular hexagonal hole in a T-rib web;
FIG. 9 is a schematic view of a web having a regular hexagonal hole formed therein after the T-shaped rib is formed.
In FIG. 1 ~ 2, 1-T-shaped steel tube, 2-perforated T-shaped rib, 3-reinforcing hoop, and 4-fully recycled concrete.
Detailed Description
As shown in fig. 1 to 5, the T-shaped steel tube recycled concrete special-shaped column with the perforated T-shaped rib of the invention comprises a T-shaped steel tube framework (1), a T-shaped rib framework (2), a reinforcing hoop framework (3) and fully recycled concrete (4). The T-shaped steel pipe framework is formed by welding a plurality of steel plates, the number of the steel plates is Q235 or Q355, the plate thickness is 4 mm-8 mm, the maximum width-thickness ratio is 60, and the steel plates are welded by butt welding seams which can be partially or completely welded; the reinforcing hoop framework is a reinforcement cage formed by binding spiral stirrups and longitudinal reinforcements; the coarse aggregate in the fully recycled concrete is all derived from waste concrete.
In a further embodiment, a reinforcing hoop framework is disposed at the intersection of the longitudinal and transverse column limbs. The spiral stirrup is formed by bending plain steel bars or hot-rolled ribbed steel bars, the strength grade of the spiral stirrup is HPB300, HRB335, HRB400 or HRB500, the distance d is 40-80 mm, and the diameter is 8-12 mm; the longitudinal bars are smooth steel bars, the strength grade is HPB300, 6 longitudinal bars are uniformly distributed along the circumference of the reinforcing hoop, the diameter of the longitudinal bars is 6 mm-10 mm, and the diameter of the longitudinal bars is smaller than that of the spiral hoops.
In a further embodiment, the strength grade of the fully recycled concrete is C30, and the strength grade of the waste concrete is C25; the mixing proportion of the fully recycled concrete is, by weight: cement: sand: and (3) regenerating coarse aggregate: fly ash: water reducing agent = 1:1.60:1.87:4.17:0.32: 0.01. The standard method specified in the industry is adopted for detection, and the experimental data are as follows: the slump is 180 mm, the workability is excellent, the 28-day cube test block breaking load is 735.75 kN, and the compressive strength is 32.7 MPa.
In a further embodiment, the web of the T-shaped rib is perforated, and then the perforated web is welded with another flange steel plate to form the T-shaped rib framework. The steel plate is Q235 or Q355, the plate is 4-10 mm thick, the maximum width-thickness ratio is 40, and the web plate and the flange are welded by adopting a butt full penetration weld. Holes formed in the web plate of the T-shaped rib are evenly spaced, the holes are circular or regular hexagonal, the hole centers are located on the same vertical line, and the hole spacing is 100-300 mm. The perforated T-shaped ribs are welded with the inner wall of the T-shaped steel pipe in a parallel or staggered mode, and a double-sided fillet welding mode can be adopted.
Example 1
In this embodiment, the T-shaped ribs are uniformly and equally spaced apart circular holes in the web (see fig. 3), and the hole-forming process is shown in fig. 6: first, cutting is performed along a predetermined dotted line from one end of the web, and then, cutting is performed along a predetermined dotted line from the other end of the web. After cutting, two webs are produced, the webs are butted in a staggered mode, wave troughs of the webs are aligned to wave crests of the webs, and then butt-joint full-penetration welding seams are adopted to weld the webs at the horizontal sections of adjacent wave crests (wave troughs). The formed open-cell web is shown in fig. 7. In the embodiment, because the thickness of the T-shaped special-shaped column is larger, the perforated T-shaped rib is welded with the inner walls of two steel pipes opposite to the length direction of the column in a parallel mode (see figure 1), the distance between the T-shaped ribs is 200 mm, and the height of the web section of the T-shaped rib does not exceed 1/3 of the thickness of the column.
Example 2
In this embodiment, the T-shaped ribs have regular hexagonal holes (see fig. 4) uniformly spaced on the web, and the hole forming process is shown in fig. 8: cutting the web plates along a preset dotted line from the right end of the web plate to generate a first web plate and a second web plate, and butting the first web plate and the second web plate in a staggered manner to enable a half regular hexagonal hole of the first web plate to be aligned with a half regular hexagonal hole of the second web plate, then connecting a horizontal section in the two holes, and welding the first web plate and the second web plate to form by adopting a butt full-penetration welding seam. The formed web with the regular hexagonal holes is shown in figure 9. In this embodiment, because the thickness of the T-shaped special-shaped column is smaller, the perforated T-shaped rib is welded with the inner walls of two opposite steel pipes in the length direction of the column in a staggered mode (see figure 2), the distance between the T-shaped ribs is 150 mm, and the height of the web section of the T-shaped rib is greater than 1/2 of the thickness of the column.
Further, the method for manufacturing the above-mentioned T-shaped steel tube recycled concrete special-shaped column with the open hole T-shaped rib according to the present invention comprises the following steps:
step 1, intercepting all component steel plates of the T-shaped steel pipe in a processing plant according to the size requirement, then forming holes on a web plate of a T-shaped rib according to the requirement, welding the T-shaped rib with the steel plates according to a certain interval, and finally welding all the steel plates to form a T-shaped steel pipe special-shaped column;
step 2, manufacturing the reinforcing steel bars into a spiral shape in a processing plant, and uniformly binding longitudinal bars along the circumference according to the distance between the stirrups to form a reinforcing hoop framework;
step 3, conveying the processed T-shaped steel pipe special-shaped column and the reinforcing hoop to a construction site, after the reinforcing hoop is positioned and installed, calculating the bending and shearing capacities of the T-shaped steel pipe special-shaped column, determining a reasonable hoisting scheme, controlling the deformation of the special-shaped column within an elastic range, and hoisting the special-shaped column to a preset position;
and 4, preparing and pouring fully-recycled commercial concrete according to the design mixing ratio, and forming the T-shaped steel tube recycled concrete special-shaped column with the perforated T-shaped ribs after natural curing for 28 days.
In the embodiment, the T-shaped steel pipe is convenient to design and construct, the protruding of column edges is avoided, the bearing capacity of the fully recycled concrete is improved, the reinforcing hoops have a strong constraint effect on the fully recycled concrete at the intersection of the longitudinal column and the transverse column, and the T-shaped steel pipe and the reinforcing hoops have a synergistic effect to promote the recycling range of the waste concrete; the perforated T-shaped ribs vertically arranged are provided with one more flange than common ribbed slabs, and the web plates are uniformly perforated, so that cast-in-place fully recycled concrete is connected into a whole, the bonding performance of the steel pipe and the fully recycled concrete can be obviously enhanced, and the occurrence of local buckling of the steel pipe is effectively delayed. The perforated T-shaped ribs and the reinforcing hoops adopted by the invention can fully exert the material performance of the steel tube and the fully recycled concrete, and ensure that the structure has higher bearing capacity and good anti-seismic performance; meanwhile, the T-shaped steel pipe, the T-shaped ribs and the reinforcing hoops can be prefabricated in a factory, the fully recycled concrete can be prepared in a commercial concrete mixing plant, a template is not needed in site construction, and the production efficiency and the quality can be improved; and steel is saved in the T-shaped rib hole opening mode, the height of the cross section of the web plate is increased, and the construction cost is reduced.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a take T shape steel pipe recycled concrete dysmorphism post of trompil T shape rib, includes T shape steel pipe skeleton (1), T shape rib skeleton (2), strengthens hoop skeleton (3) and full recycled concrete (4), its characterized in that: the T-shaped steel pipe framework is formed by welding a plurality of steel plates; the T-shaped rib framework is formed by welding two steel plates, a web plate is provided with a hole, and the T-shaped ribs with the holes are welded with the inner wall of the T-shaped steel pipe in a parallel or staggered mode; the reinforcing hoop framework is a reinforcement cage formed by binding spiral stirrups and longitudinal reinforcements; the coarse aggregate in the fully recycled concrete is completely derived from waste concrete.
2. A T-shaped steel tube recycled concrete profiled pole with an open-cell T-shaped rib as claimed in claim 1, characterized in that: holes are uniformly arranged on the web plate at equal intervals on the perforated T-shaped ribs, the holes are circular or regular hexagonal, the hole centers are located on the same vertical line, and the hole intervals are 100-300 mm.
3. A T-shaped steel tube recycled concrete profiled pole with an open-cell T-shaped rib as claimed in claim 1, characterized in that: the reinforcing hoop framework is arranged at the intersection of the longitudinal and transverse column limbs and the space between the spiral hoopsd40 mm-80 mm, 8 mm-12 mm in diameter, 6 longitudinal ribs are uniformly arranged along the circumference of the reinforcing hoop, the diameter is 6 mm-10 mm, and the diameter of each longitudinal rib is 6 mm-10 mmSmaller than the diameter of the spiral stirrup.
4. A T-shaped steel tube recycled concrete profiled pole with an open-cell T-shaped rib as claimed in claim 1, characterized in that: the strength grade of the fully recycled concrete is C30, and the strength grade of the waste concrete is not lower than C25; the mixing proportion of the fully recycled concrete is, by weight: cement: sand: and (3) regenerating coarse aggregate: fly ash: water reducing agent = 1:1.60:1.87:4.17:0.32: 0.01.
5. A method for manufacturing a T-shaped steel tube recycled concrete profiled pole with an open T-shaped rib as claimed in any one of claims 1 to 4, characterized by comprising the steps of:
step 1, intercepting all component steel plates of the T-shaped steel pipe in a processing plant according to the size requirement, then forming holes on a web plate of a T-shaped rib according to the requirement, welding the T-shaped rib with the steel plates according to a certain interval, and finally welding all the steel plates to form a T-shaped steel pipe special-shaped column;
step 2, manufacturing the reinforcing steel bars into a spiral shape in a processing plant, and uniformly binding longitudinal bars along the circumference according to the stirrup spacing to manufacture a reinforcing stirrup framework;
step 3, transporting the processed T-shaped steel pipe special-shaped column and the reinforcing hoop to a construction site, positioning and installing the reinforcing hoop, and hoisting the T-shaped steel pipe special-shaped column to a preset position;
and 4, preparing and pouring fully-recycled commercial concrete according to the design mixing ratio, and forming the T-shaped steel tube recycled concrete special-shaped column with the perforated T-shaped ribs after natural curing for 28 days.
CN201910997100.9A 2019-10-20 2019-10-20 T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method Pending CN110607878A (en)

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CN201910997100.9A CN110607878A (en) 2019-10-20 2019-10-20 T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910997100.9A CN110607878A (en) 2019-10-20 2019-10-20 T-shaped steel pipe recycled concrete special-shaped column with perforated T-shaped ribs and manufacturing method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502124A (en) * 2020-05-19 2020-08-07 潍坊宏图环保设备有限公司 Energy-saving rectangular steel tube concrete column

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111502124A (en) * 2020-05-19 2020-08-07 潍坊宏图环保设备有限公司 Energy-saving rectangular steel tube concrete column
CN111502124B (en) * 2020-05-19 2021-06-29 潍坊宏图环保设备有限公司 Energy-saving rectangular steel tube concrete column

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