CN109972735B - Manufacturing method of thin-wall steel tube constraint bamboo component - Google Patents
Manufacturing method of thin-wall steel tube constraint bamboo component Download PDFInfo
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- CN109972735B CN109972735B CN201910365903.2A CN201910365903A CN109972735B CN 109972735 B CN109972735 B CN 109972735B CN 201910365903 A CN201910365903 A CN 201910365903A CN 109972735 B CN109972735 B CN 109972735B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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Abstract
A manufacturing method of a thin-wall steel pipe constraint bamboo component comprises the steps of butting a constant-section bamboo section with a wedge-shaped end to form a core bamboo, installing a jacking pipe, placing a thin-wall steel pipe, installing a variable-section sleeve, embedding the core bamboo, pressing down a jack, removing the variable-section sleeve and the jacking pipe, and polishing the component to form the thin-wall steel pipe constraint bamboo component, wherein the core bamboo consists of the constant-section bamboo section and the wedge-shaped end, the thin-wall steel pipe, the variable-section sleeve and the jacking pipe can be repeatedly utilized. According to the invention, through the lap joint of the variable-section sleeve and the thin-wall steel pipe and the arrangement of the wedge-shaped end head of the core bamboo, the core bamboo with the cross section size slightly larger than the inner diameter of the thin-wall steel pipe is pressed in the thin-wall steel pipe. The invention can effectively improve the bearing capacity and the deformability of single bamboo in the use process, and meanwhile, the existence of the steel pipe also avoids the brittle failure mode of core bamboo, so that the invention can be widely applied to members such as beams, columns and the like in the civil engineering field.
Description
Technical Field
The invention belongs to the field of civil engineering, and particularly relates to a manufacturing method of a combined member, in particular to a manufacturing method of a thin-wall steel tube constraint bamboo member.
Background
At present, most of building structures in China adopt brick-concrete structures and reinforced concrete structures, a large amount of clay products, cement and steel are needed to be used, and the building materials have the defects of high energy consumption, large pollution, difficult degradation after being abandoned, poor heat preservation and insulation performance, poor earthquake resistance and the like. In the current large environment of developing low-carbon economy, a novel building structure material with environmental protection, ecology and environmental protection is a necessary direction of civil engineering technology development. The bamboo is one of the varieties of the current green environment-friendly materials, and researches show that the bamboo structure has the advantages of green, ecological, environment-friendly, low carbon and the like, and the development of the bamboo structure system has important significance.
The bamboo engineering material, such as recombined bamboo, bamboo integrated material, bamboo laminated material, bamboo curtain plywood and the like, is widely used as novel materials for pedestrian bridges, settling rooms, landscape buildings and the like, is mainly used as compression members for vertical stress members such as structural columns, piers and the like, and researches show that the compression damage mode of the bamboo engineering material is represented as brittle fracture of buckling damage, decompression damage and splitting damage, so that the whole structure loses bearing capacity, and the excellent compression resistance of the bamboo is often not effectively exerted due to the lack of lateral constraint of common bamboo.
The steel tube restrained concrete structure has long research history and mature technology, and the steel tube can provide continuous circumferential restraining force for core concrete, so that the concrete is in a three-way compression state, the bearing capacity and the deformability of the concrete are improved, the brittle failure of the concrete is avoided, the inward buckling of the steel tube is also avoided due to the existence of the core concrete, and the defects of heavy self weight, high energy consumption and the like of the concrete are overcome.
Disclosure of Invention
The invention aims to provide a manufacturing method of a thin-wall steel pipe restraining bamboo component, which is simple in principle and easy to operate, a wedge-shaped end of a core bamboo material is used for assisting in pressing down, a variable-section sleeve and a jacking pipe can be repeatedly disassembled and utilized, the matched variable-section sleeve and the jacking pipe can be replaced according to the cross section forms of the thin-wall steel pipe and the core bamboo material, the application range is wide, standardization and finalization are easy, factory prefabrication production of the component is realized, the production efficiency is improved, the pressed-in core bamboo material can be actively subjected to the continuous circumferential restraining force provided by the thin-wall steel pipe, and the bearing capacity and the deformability of the production component are improved.
The technical scheme of the invention is as follows: a manufacturing method of a thin-wall steel pipe constraint bamboo component comprises the following specific steps of butt-jointing a constant-section bamboo section and a wedge-shaped end to form a core bamboo, installing a jacking pipe, placing a thin-wall steel pipe, installing a variable-section sleeve, embedding the core bamboo, pressing down a jack, removing the variable-section sleeve and the jacking pipe, and polishing the component to form the thin-wall steel pipe constraint bamboo component, wherein the static pressure device consists of a base and the jack, the core bamboo consists of the constant-section bamboo section and the wedge-shaped end, the thin-wall steel pipe, the variable-section sleeve and the jacking pipe can be repeatedly utilized:
A. preparation: selecting a thin-wall steel pipe and a core bamboo material meeting design requirements, wherein the length of a constant-section bamboo section of the core bamboo material is equal to that of the thin-wall steel pipe, the section size of the core bamboo material is 0.1-1.0 mm larger than that of an inner cavity of the thin-wall steel pipe, rust removal treatment is carried out on the inner surface and the outer surface of the thin-wall steel pipe, and the outer surface of the core bamboo material is clean.
B. Butt joint to form a core bamboo material: the constant-section bamboo section and the wedge-shaped end are butted to form a core bamboo, the cross section of the wedge-shaped end is uniformly changed along the length, one end of the wedge-shaped end is large, the other end of the wedge-shaped end is small, the cross section shape and the size of the larger end are the same as those of the constant-section bamboo section, and the cross section size of the smaller end is smaller than that of the thin-wall steel pipe.
C. And (3) mounting a jacking pipe: the jacking pipe is arranged on a base of the static pressure device, the center line of the jacking pipe and the center line of the jack are guaranteed to be on the same straight line, the cross-sectional dimension of the inner cavity of the jacking pipe is larger than or equal to that of the inner cavity of the thin-wall steel pipe, and the height of the jacking pipe is larger than or equal to the length of the wedge-shaped end head of the core bamboo wood.
D. Placing a thin-wall steel tube: and placing the thin-wall steel pipe at the end part of the jacking pipe, and keeping the central lines of the thin-wall steel pipe and the jacking pipe on the same straight line.
E. Installing a variable cross-section sleeve: and installing a variable cross-section sleeve on the upper part of the thin-wall steel pipe, wherein the ends of the variable cross-section sleeve and the thin-wall steel pipe are aligned when the variable cross-section sleeve is installed, and the central lines of the variable cross-section sleeve and the thin-wall steel pipe are consistent.
F. Embedding core bamboo wood: the core bamboo is embedded in the variable cross-section sleeve, consists of a constant cross-section bamboo section and a wedge-shaped end, the small end of the wedge-shaped end faces the variable cross-section sleeve, one end face of the constant cross-section bamboo section is close to the large end of the wedge-shaped end, and the center line of the core bamboo is consistent with the center line of the variable cross-section steel pipe.
G. Pressing down jack: and pressing down the jack, ensuring that the axis of the core bamboo is pressed, stopping pressing down when the end face of the large end of the wedge-shaped end head of the core bamboo is exposed out of the end face of the thin-wall steel pipe, and closing the jack.
H. Dismantling the variable cross-section sleeve and the wedge-shaped end head: returning oil to reset the jack, removing the variable cross-section sleeve and the wedge-shaped end head, and removing the pressed component.
I. Polishing a component: and (3) polishing and flattening the two ends of the member to remove redundant parts of the core bamboo material.
J. And (3) completion: and finishing the manufacturing of the thin-wall steel tube constraint bamboo member after finishing polishing.
The base is a self-balancing frame structure, and the central lines of the core bamboo, the thin-wall steel pipe, the variable cross-section sleeve, the jacking pipe and the jack are kept in the same straight line and are arranged in the middle of the self-balancing frame structure of the base.
The cross-section size of the outer surface of the variable cross-section sleeve is constant, the cross-section size of the inner cavity is changed from one end to the other end from large to small, the wall thickness is correspondingly changed from thin to thick, the minimum cross-section size of the inner cavity of the variable cross-section sleeve at the thick-wall end is equal to the cross-section size of the inner cavity of the thin-wall steel pipe, the thick-wall end is provided with a step bayonet, the cross-section size of the inner cavity of the step bayonet is equal to the cross-section size of the outer surface of the thin-wall steel pipe, the step bayonet is sleeved at the end part of the thin-wall steel pipe, and the cross section of the variable cross-section sleeve is one of a round shape, an oval shape and a rounded rectangle.
The ratio of the cross section diameter, the axial length or the side length of the outer surface of the thin-wall steel pipe to the wall thickness is 50-200.
The cross sections of the core bamboo, the thin-wall steel pipe and the top pipe are one of round, elliptic and rounded rectangle, and are consistent with the cross section shape of the variable cross section sleeve.
The wall thickness of the jacking pipe is larger than or equal to that of the thin-wall steel pipe.
The invention provides a manufacturing method of a thin-wall steel pipe constraint bamboo component, in the implementation process, through the lap joint of a variable-section sleeve pipe and a thin-wall steel pipe and the arrangement of a wedge-shaped end of a core bamboo, the core bamboo with the cross section slightly larger than the inner diameter of the thin-wall steel pipe is pressed in the thin-wall steel pipe by a self-balancing system and the pressurization of a jack, so that the core bamboo can obtain the circumferential constraint force of the thin-wall steel pipe in the transverse direction, the variable-section sleeve pipe, the jacking pipe and the wedge-shaped end can be disassembled and reused, the cost is low, the standardization and the sizing are easy, the factory prefabrication production of the component is realized, and the production efficiency is high. The invention can effectively improve the bearing capacity and the deformability of the single bamboo material in the use process, and simultaneously the brittle failure mode of the core bamboo material is avoided due to the existence of the steel pipe.
The beneficial effects of the invention are as follows:
(1) The variable cross-section sleeve is arranged at the extrusion end part of the thin-wall steel pipe, the pipe inner dimension of the variable cross-section sleeve is uniformly changed from large to small, so that core bamboo with the cross-section slightly larger than that of the thin-wall steel pipe can be extruded into the thin-wall steel pipe, the constraint bamboo component of the thin-wall steel pipe is realized, the wedge-shaped end head of the core bamboo can be extruded out of the thin-wall steel pipe through the arrangement of the jacking pipe, and the constant cross-section bamboo section of the core bamboo is completely filled in the thin-wall steel pipe.
(2) The core bamboo wood comprises constant cross section bamboo wood section and wedge end, and wedge end and thin wall steel pipe's cooperation can assist core bamboo wood to push down, and can more accurately centering, guarantees that core bamboo wood axle center is pressed.
(3) The thin-wall steel pipe, the jacking pipe and the wedge-shaped end head can be disassembled and assembled for repeated use, so that the cost is low and the efficiency is high.
(4) Through changing variable cross-section sleeve pipe, push pipe and wedge end of different cross section forms, can make the thin wall steel pipe constraint bamboo component of corresponding cross section form, easily standardized, the design realizes the mill prefabricated production of component, can be used to beams, post structures etc. of different forms, and the commonality is strong, and application scope is wide.
(5) The thin-wall steel pipe restraining bamboo member manufactured by the invention has novel structure, and the thin-wall steel pipe can actively provide effective circumferential restraining force for core bamboo materials, so that the bearing capacity and the deformability of the structure are improved.
Description of the drawings:
FIG. 1 is a process flow diagram of a manufacturing method of a thin-walled steel tube constraint bamboo component;
FIG. 2 is a perspective view of a core bamboo of a thin-walled steel tube constrained bamboo member;
FIG. 3 is a schematic view of a mounting top pipe of a method of manufacturing a thin-walled steel tube-constrained bamboo member;
FIG. 4 is a schematic view of a thin-walled steel pipe placed in a method of manufacturing a thin-walled steel pipe-constrained bamboo component;
FIG. 5 is a schematic view of a mounting variable cross-section sleeve of a method of manufacturing a thin-walled steel tube-constrained bamboo member;
FIG. 6 is a schematic illustration of an embedded core bamboo of a method of making a thin-walled steel tube constrained bamboo component;
FIG. 7 is a schematic view of a pressing jack of a method for manufacturing a thin-walled steel tube-constrained bamboo member;
FIG. 8 is a schematic elevation view of a pressing jack of a manufacturing method of a thin-wall steel tube constraint bamboo component;
FIG. 9 is a schematic view of a wedge-shaped end press-in top pipe elevation of a method for manufacturing a thin-walled steel pipe-constrained bamboo member;
FIG. 10 is a schematic elevational view of the core bamboo pressed into the thin-walled steel pipe;
FIG. 11 is a schematic perspective view of a finished thin-walled steel tube restraint bamboo member;
FIG. 12 is a perspective view of a variable cross-section sleeve of a method of manufacturing a thin-walled steel tube-constrained bamboo member;
FIG. 13 is a schematic elevation view of a variable cross-section sleeve of a method of making a thin-walled steel tube-constrained bamboo member;
FIG. 14 is a schematic cross-sectional view of a circular section thin wall steel tube restraint bamboo member;
FIG. 15 is a schematic cross-sectional view of a rounded rectangular section thin-walled steel tube constraining bamboo member;
FIG. 16 is a schematic cross-sectional view of an oval section thin-walled steel tube constraining bamboo member;
in all the drawings, 1 is core bamboo wood; 11 is a constant section bamboo section; 12 is a wedge-shaped end head; 2 is a thin-wall steel pipe; 3 is a variable cross-section sleeve; 31 is a step bayonet; 4 is a jacking pipe; 5 is a static pressure device; 51 is a base; 52 are jacks.
The specific embodiment is as follows:
for a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings. The invention provides a manufacturing method of a thin-wall steel pipe constraint bamboo component, which comprises the steps of butting a constant-section bamboo section 11 with a wedge-shaped end 12 to form a core bamboo 1, installing a jacking pipe 4, placing a thin-wall steel pipe 2, installing a variable-section sleeve 3, embedding the core bamboo 1, pressing down a jack 52, dismantling the variable-section sleeve 3 and the jacking pipe 4, and polishing the component to form the thin-wall steel pipe constraint bamboo component, wherein a static pressure device 5 consists of a base 51 and the jack 52, the core bamboo 1 consists of the constant-section bamboo section 11 and the wedge-shaped end 12, the thin-wall steel pipe 2, the variable-section sleeve 3 and the jacking pipe 4 can be repeatedly utilized, and the manufacturing method comprises the following specific steps:
A. preparation: the method comprises the steps of selecting a thin-wall steel pipe 2 and a core bamboo 1 meeting design requirements, enabling the length of a constant section bamboo section 11 of the core bamboo 1 to be equal to the length of the thin-wall steel pipe 2, enabling the section size of the core bamboo 1 to be 0.1-1.0 mm larger than the section size of an inner cavity of the thin-wall steel pipe 2, performing rust removal treatment on the inner surface and the outer surface of the thin-wall steel pipe 2, and cleaning the outer surface of the core bamboo 1.
B. Butt joint to form a core bamboo material: the constant section bamboo section 11 is butted with the wedge-shaped end head 12 to form the core bamboo 1, the section of the wedge-shaped end head 12 is uniformly changed along the length, one end of the wedge-shaped end head is large, the other end of the wedge-shaped end head is small, the section shape and the size of the larger end are the same as those of the constant section bamboo section 11, and the section size of the smaller end is smaller than that of the thin-wall steel pipe 2.
C. And (3) mounting a jacking pipe: the jacking pipe 4 is arranged on a base 51 of the static pressure device 5, the center line of the jacking pipe 4 and the center line of the jack 52 are ensured to be on the same straight line, the cross section size of the inner cavity of the jacking pipe 4 is larger than or equal to that of the inner cavity of the thin-wall steel pipe 2, and the height of the jacking pipe 4 is larger than or equal to the length of the wedge-shaped end 12 of the core bamboo material 1.
D. Placing a thin-wall steel tube: the thin-wall steel pipe 2 is arranged at the end part of the jacking pipe 4, and the central lines of the thin-wall steel pipe and the jacking pipe are kept on the same straight line.
E. Installing a variable cross-section sleeve: a variable cross-section sleeve 3 is arranged on the upper part of the thin-wall steel pipe 2, the ends of the variable cross-section sleeve and the variable cross-section steel pipe are aligned when the variable cross-section sleeve is arranged, and the central lines of the variable cross-section sleeve and the variable cross-section steel pipe are consistent.
F. Embedding core bamboo wood: the core bamboo material 1 is embedded in the variable cross-section sleeve 3, the core bamboo material 1 consists of a constant cross-section bamboo material section 11 and a wedge-shaped end head 12, the small end of the wedge-shaped end head 12 faces the variable cross-section sleeve 3, one end face of the constant cross-section bamboo material section 11 is close to the large end of the wedge-shaped end head 12, and the central line of the core bamboo material 1 is consistent with the central line of the variable cross-section steel pipe.
G. Pressing down jack: and pressing down the jack 52 to ensure that the axis of the core bamboo 1 is pressed, stopping pressing down when the end face of the large end of the wedge-shaped end head 12 of the core bamboo 1 is exposed out of the end face of the thin-wall steel pipe 2, and closing the jack 52.
H. Dismantling the variable cross-section sleeve and the wedge-shaped end head: the jack 52 returns to the oil return state, the variable-section sleeve 3 and the wedge-shaped end head 12 are removed, and the pressed-in component is removed.
I. Polishing a component: and (3) polishing and flattening the two ends of the member, and removing redundant parts of the core bamboo material 1.
J. And (3) completion: and finishing the manufacturing of the thin-wall steel tube constraint bamboo member after finishing polishing.
The base 51 is a self-balancing frame structure, and the central lines of the core bamboo 1, the thin-wall steel pipe 2, the variable cross-section sleeve 3, the jacking pipe 4 and the jack 52 are kept in the same straight line and are arranged in the middle position in the self-balancing frame structure of the base 51.
The cross-section size of the outer surface of the variable cross-section sleeve 3 is constant, the cross-section size of the inner cavity is changed from one end to the other end from large to small, the wall thickness is correspondingly changed from thin to thick, the minimum cross-section size of the inner cavity of the variable cross-section sleeve 3 at the thick-wall end is equal to the cross-section size of the inner cavity of the thin-wall steel tube 2, the thick-wall end is provided with a step bayonet 31, the cross-section size of the inner cavity of the step bayonet is equal to the cross-section size of the outer surface of the thin-wall steel tube 2, the step bayonet 31 is sleeved at the end part of the thin-wall steel tube 2, and the cross section of the variable cross-section sleeve 3 is one of round, elliptic and rounded rectangle.
The ratio of the cross section diameter, the axial length or the side length of the outer surface of the thin-wall steel tube 2 to the wall thickness is 50-200.
The cross sections of the core bamboo material 1, the thin-wall steel pipe 2 and the jacking pipe 4 are one of round, elliptic and rounded rectangle, and are consistent with the cross section shape of the variable cross section sleeve 3.
The wall thickness of the jacking pipe 4 is larger than or equal to the wall thickness of the thin-wall steel pipe 2.
Claims (6)
1. A manufacturing method of a thin-wall steel pipe constraint bamboo member is characterized in that a constant-section bamboo section (11) is in butt joint with a wedge-shaped end (12) to form a core bamboo (1), a jacking pipe (4) is installed, a thin-wall steel pipe (2) is placed, a variable-section sleeve (3) is installed, the core bamboo (1) is embedded, a jack (52) is pressed down, the variable-section sleeve (3) and the jacking pipe (4) are removed, the member is polished to form the thin-wall steel pipe constraint bamboo member, a static pressure device (5) is composed of a base (51) and the jack (52), the core bamboo (1) is composed of the constant-section bamboo section (11) and the wedge-shaped end (12), the thin-wall steel pipe (2), the variable-section sleeve (3) and the jacking pipe (4) can be repeatedly utilized, and the manufacturing method comprises the following specific steps:
A. preparation: selecting a thin-wall steel pipe (2) and a core bamboo (1) meeting design requirements, wherein the length of a constant-section bamboo section (11) of the core bamboo (1) is equal to the length of the thin-wall steel pipe (2), the section size of the core bamboo (1) is 0.1-1.0 mm larger than the section size of an inner cavity of the thin-wall steel pipe (2), rust removing treatment is carried out on the inner surface and the outer surface of the thin-wall steel pipe (2), and the outer surface of the core bamboo (1) is clean;
B. butt joint to form a core bamboo material: the constant-section bamboo section (11) is butted with the wedge-shaped end head (12) to form a core bamboo (1), the cross section of the wedge-shaped end head (12) is uniformly changed along the length, one end of the wedge-shaped end head is large, the other end of the wedge-shaped end head is small, the cross section shape and the size of the larger end of the wedge-shaped end head are the same as those of the constant-section bamboo section (11), and the cross section size of the smaller end of the wedge-shaped end head is smaller than that of the thin-wall steel pipe (2);
C. and (3) mounting a jacking pipe: the method comprises the steps that a jacking pipe (4) is arranged on a base (51) of a static pressure device (5), the center line of the jacking pipe (4) and the center line of a jack (52) are guaranteed to be on the same straight line, the cross-sectional size of an inner cavity of the jacking pipe (4) is larger than or equal to that of an inner cavity of a thin-wall steel pipe (2), and the height of the jacking pipe (4) is larger than or equal to the length of a wedge-shaped end (12) of a core bamboo (1);
D. placing a thin-wall steel tube: the thin-wall steel pipe (2) is arranged at the end part of the jacking pipe (4), and the central lines of the thin-wall steel pipe and the jacking pipe are kept on the same straight line;
E. installing a variable cross-section sleeve: the upper part of the thin-wall steel pipe (2) is provided with a variable cross-section sleeve (3), the ends of the variable cross-section sleeve and the variable cross-section sleeve are aligned when the variable cross-section sleeve is installed, and the central lines of the variable cross-section sleeve and the variable cross-section sleeve are consistent;
F. embedding core bamboo wood: the method comprises the steps that core bamboo materials (1) are embedded in a variable-section sleeve (3), the core bamboo materials (1) are composed of constant-section bamboo material sections (11) and wedge-shaped ends (12), the small ends of the wedge-shaped ends (12) face the variable-section sleeve (3), one end face of each constant-section bamboo material section (11) is close to the large end of each wedge-shaped end (12), and the center line of each core bamboo material (1) is consistent with the center line of each variable-section steel pipe;
G. pressing down jack: the jack (52) is pressed down, so that the axle center of the core bamboo wood (1) is pressed, the jack (52) is closed when the end face of the large end of the wedge-shaped end head (12) of the core bamboo wood (1) is exposed out of the end face of the thin-wall steel pipe (2), and the pressing down is stopped;
H. dismantling the variable cross-section sleeve and the wedge-shaped end head: returning oil to reset the jack (52), removing the variable cross-section sleeve (3) and the wedge-shaped end head (12), and removing the pressed component;
I. polishing a component: polishing two ends of the member to be smooth, and removing redundant parts of the core bamboo material (1);
J. and (3) completion: and finishing the manufacturing of the thin-wall steel tube constraint bamboo member after finishing polishing.
2. The manufacturing method of the thin-wall steel pipe constraint bamboo component according to claim 1 is characterized in that the base (51) is of a self-balancing frame structure, the central lines of the core bamboo (1), the thin-wall steel pipe (2), the variable cross-section sleeve (3), the jacking pipe (4) and the jack (52) are kept on the same straight line, and the base is arranged in the middle of the self-balancing frame structure of the base (51).
3. The manufacturing method of the thin-wall steel pipe constraint bamboo component according to claim 1, wherein the cross-sectional dimension of the outer surface of the variable-section sleeve (3) is constant, the cross-sectional dimension of an inner cavity is changed from one end to the other end from large to small, the wall thickness is correspondingly changed from thin to thick, the minimum cross-sectional dimension of the inner cavity of the variable-section sleeve (3) at the thick-wall end is equal to the cross-sectional dimension of the inner cavity of the thin-wall steel pipe (2), the thick-wall end is provided with a step bayonet (31), the cross-sectional dimension of the inner cavity of the step bayonet is equal to the cross-sectional dimension of the outer surface of the thin-wall steel pipe (2), the step bayonet (31) is sleeved at the end of the thin-wall steel pipe (2), and the cross section of the variable-section sleeve (3) is one of round, elliptic or rounded rectangle.
4. The manufacturing method of the thin-wall steel pipe constraint bamboo component according to claim 1, which is characterized in that the ratio of the cross-section diameter, the axial length or the side length dimension and the wall thickness of the outer surface of the thin-wall steel pipe (2) is 50-200.
5. The manufacturing method of the thin-wall steel pipe constraint bamboo component is characterized in that the cross sections of the core bamboo (1), the thin-wall steel pipe (2) and the top pipe (4) are one of round, oval or round-cornered rectangles, and the cross section shape of the thin-wall steel pipe constraint bamboo component is consistent with the cross section shape of the variable cross section sleeve (3).
6. The manufacturing method of the thin-wall steel pipe constraint bamboo component according to claim 1, wherein the wall thickness of the top pipe (4) is larger than or equal to the wall thickness of the thin-wall steel pipe (2).
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| CN106760216A (en) * | 2017-01-17 | 2017-05-31 | 南京林业大学 | A kind of bamboo wood multiple tube constrains steel reinforced concrete combining structure |
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| CN108943226A (en) * | 2018-07-24 | 2018-12-07 | 南京林业大学 | Rectangular section bamboo forming device and method |
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