A connection node structure and construction method for a steel-bamboo composite structure

Abstract

The present invention relates to the technical field of building construction, and specifically discloses a connection node structure and construction method for a steel-bamboo composite structure; among them, the node structure is used for connecting bamboo and steel structures, and includes multiple groups of fixing parts installed on the steel structure and having one end extending into the inner cavity of the bamboo, a sealing part sleeved on each group of fixing parts and used for closing the end of the bamboo close to the steel structure, a connecting part used for connecting the fixing part and the bamboo, and a grouting material filled in the inner cavity of the bamboo. A specific construction method is also disclosed; the present invention can effectively realize the connection between bamboo and steel structures; at the same time, it improves the shear resistance and avoids the cracking of bamboo; the structure is simple and the practicability is strong.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and more specifically, to a connection node structure and construction method for a steel-bamboo composite structure. Background Art

[0002] Bamboo is widely distributed in China. It has the characteristics of being renewable, having a fast growth cycle, strong carbon sequestration ability, and excellent mechanical properties. Therefore, bamboo is a green building material with good performance. As a building structure material, it can promote the green and low-carbon development of buildings. Due to its own characteristics, bamboo is mostly used in low-rise buildings of 1-2 floors. For large-space buildings, it needs to be combined with other structures, such as a steel-bamboo composite structure. However, in the prior art, there is a lack of a structure for connecting bamboo with a steel structure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a connection node structure and construction method for a steel-bamboo composite structure.

[0004] The solution adopted by the present invention to solve the technical problem is:

[0005] On the one hand:

[0006] The present invention provides a connection node structure for a steel-bamboo composite structure, which is used for connecting bamboo with a steel structure. It is characterized in that it includes multiple groups of fixing parts installed on the steel structure and having one end extending into the inner cavity of the bamboo, a closing part sleeved on each group of fixing parts and used for closing one end of the bamboo close to the steel structure, a connecting part used for connecting the fixing part and the bamboo, and a grouting material filled in the inner cavity of the bamboo.

[0007] In some possible implementation manners,

[0008] Two groups of hoop fasteners are sleeved on the outer side of the bamboo, and the two groups of hoop fasteners are arranged along the axial direction of the bamboo; the connecting parts are respectively located between the two groups of hoop fasteners.

[0009] In some possible implementation manners,

[0010] A grouting hole is provided on the bamboo; the grouting hole is located between the two groups of hoop fasteners.

[0011] In some possible implementation manners,

[0012] The closing part includes a cover plate sleeved in the inner cavity of the bamboo and a rubber ring installed on the cover plate and located in the inner cavity of the bamboo; an observation hole communicating with the inner cavity of the bamboo is provided on the cover plate.

[0013] In some possible implementation manners,

[0014] The fixing members are arranged in a rectangular array on the side surface of the steel structure; wherein the fixing members include upper fixing members arranged vertically, several groups of middle-layer fixing members, and lower fixing members.

[0015] In some possible implementation manners,

[0016] The upper fixing members and the lower fixing members have the same structure, and include multiple groups of steel plates I arranged in parallel in the horizontal direction and installed on the steel structure. One end of each steel plate I is inserted into the corresponding inner cavity of the bamboo material; the connecting member is a long bolt, and one end of the long bolt passes through all the corresponding steel plates I and the bamboo material of the upper fixing member / lower fixing member.

[0017] In some possible implementation manners,

[0018] The middle-layer fixing members include two steel plates II arranged in parallel and installed on the steel structure, and a steel pipe located between the two steel plates II; there are two groups of connecting members, which are arranged in one-to-one correspondence with the steel plates II; the connecting members are short bolts.

[0019] On the other hand:

[0020] The present invention also provides a construction method for a connection node structure of a steel-bamboo composite structure, which specifically includes the following steps:

[0021] Step S1: Installation of fixing members and closing members;

[0022] Step S2: Installation and grouting of the lower-layer bamboo materials corresponding to the lower fixing members; specifically:

[0023] Step S21: Sleeving the hoop on the outer side of each lower-layer bamboo material;

[0024] Step S22: Respectively sleeving the lower-layer bamboo materials on the outer sides of the corresponding steel plates I and performing temporary support, and at the same time bundling and fixing all the bamboo materials of this layer;

[0025] Step S23: Drilling holes in the lower-layer bamboo materials, and making the hole positions on the same horizontal plane as the hole positions of the steel plates I;

[0026] Step S24: Using long bolts to fixedly connect all the lower-layer bamboo materials with all the steel plates I, and stuffing the closing member into the inner cavity of the bamboo material, and controlling the observation hole to face upward;

[0027] Step S25: Sealing the gaps between the drilled holes and the long bolts, and the gaps between the closing member and the bamboo material and the steel plates I respectively;

[0028] Step S26: Grouting through the grouting hole;

[0029] Step S3: Installation and grouting of the middle-layer bamboo materials corresponding to the middle-layer fixing members;

[0030] Step S4: Install and grout the upper bamboo materials corresponding to the upper fixing parts;

[0031] Step S5: The construction is completed.

[0032] In some possible embodiments,

[0033] The specific steps of step S3 include the following steps:

[0034] Step S31: Install and grout the middle outer bamboo materials corresponding to the second steel plate in the middle layer fixing parts; specifically including the following steps:

[0035] Step S311: Sleeve a hoop on the outer side of each middle outer bamboo material;

[0036] Step S312: Place short bamboo between two middle outer bamboo materials to form a whole and tie and fix it to the lower bamboo materials;

[0037] Step S313: Make hole-opening treatment on two middle outer bamboo materials and make the hole positions on the same horizontal plane as the hole positions of the second steel plate;

[0038] Step S314: Use short bolts to fixedly connect the middle outer bamboo materials to the corresponding second steel plate, and plug the sealing parts into the inner cavities of the bamboo materials, controlling the observation holes to face upward;

[0039] Step S315: Seal all the gaps;

[0040] Step S316: Grout through the grouting holes;

[0041] Step S32: Install and grout the middle inner bamboo materials corresponding to the steel pipes.

[0042] In some possible embodiments,

[0043] The specific meaning of step S32 is:

[0044] Step S321: Sleeve the middle inner bamboo materials on the outer sides of the steel pipes;

[0045] Step S322: Use the sealing parts to seal the side of the middle inner bamboo materials close to the steel beams;

[0046] Step S323: Grout through the grouting holes.

[0047] Compared with the prior art, the beneficial effects of the present invention:

[0048] The present invention effectively realizes the connection between bamboo materials and steel structures through the cooperation of connecting parts, fixing parts and hoops;

[0049] By providing the hoop, the shear resistance can be enhanced. When the hoop is arranged on both sides of the connecting member, the anti-cracking ability of the bamboo can be effectively improved.

[0050] In the present invention, by using steel as the connecting member, the difficulty of aligning the holes in the raw bamboo is reduced; by using a steel pipe as the fixing member, the overall strength of the joint is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic structural view of the connection joint structure of the steel-bamboo composite structure in the present invention;

[0052] Figure 2 It is a cross-sectional view of the connection joint structure of the steel-bamboo composite structure in the present invention

[0053] Figure 3 It is a cross-sectional view of the upper fixing member or the lower fixing member, the long bolt, and the bamboo in the present invention;

[0054] Figure 4 It is a cross-sectional view of the middle fixing member, the long bolt, and the bamboo in the present invention;

[0055] Figure 5 It is a schematic structural view of the closure member in the present invention;

[0056] Wherein: 1. Fixing member; 11. First steel plate; 12. Steel pipe; 13. Second steel plate; 2. Closure member; 21. Cover plate; 211. Observation hole; 22. Rubber ring; 3. Connecting member; 31. Long bolt; 32. Short bolt; 4. Grout; 10. Steel structure; 20. Bamboo. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. The "first", "second" and similar terms mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "one" or "a" do not indicate a quantity limit, but indicate that there is at least one. In the implementation of this application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of this application, unless otherwise stated, the meaning of "multiple" is two or more. For example, multiple positioning columns refer to two or more positioning columns. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The present invention will be described in detail below.

[0059] Embodiment 1:

[0060] As Figures 1-5 shown:

[0061] A connecting joint structure of a steel-bamboo composite structure is used to connect bamboo 20 and steel structure 10, and includes a plurality of fixing members 1 installed on the steel structure 10 and having one end extending into the inner cavity of the bamboo 20, a closing member 2 sleeved on each group of fixing members 1 and used for closing one end of the bamboo 20 close to the steel structure 10, a connecting member 3 for connecting the fixing member 1 and the bamboo 20, and a grouting material 4 filled in the inner cavity of the bamboo 20.

[0062] The fixing member 1 is installed on the steel structure 10, and the closing member 2 is sleeved on the fixing member 1. After all the bamboos 20 are sleeved outside the corresponding fixing members 1 and fixed by the connecting member 3, the closing member 2 closes the end face opening of the bamboo 20 close to the steel plate 11; then grouting treatment is carried out into the inner cavity of the bamboo 20; thus effectively realizing the connection and fixation between the bamboo 20 and the fixing member 1.

[0063] Preferably, the grouting material 4 is a high-strength non-shrinking grouting material 4.

[0064] In some possible implementation manners, in order to effectively enable the bamboo 20 to have good shear resistance and avoid the phenomenon of cracking at the corresponding position of the connecting member 3 on the bamboo 20;

[0065] Two groups of hoops are sleeved outside the bamboo 20, and the two groups of hoops are arranged along the axial direction of the bamboo 20; the connecting member 3 is respectively located between the two groups of hoops.

[0066] The hoop is a metal hoop.

[0067] In some possible implementation manners, in order to effectively realize grouting;

[0068] A grouting hole is provided on the bamboo 20; the grouting hole is located between the two groups of hoops.

[0069] The reason why the grouting hole is arranged between the two groups of hoops is that it will also effectively avoid the situation of cracking of the bamboo 20 at the grouting hole;

[0070] In some possible implementation manners, in order to effectively close the inner cavity of the bamboo 20, so as to effectively realize grouting and facilitate the identification of whether the grouting is in place;

[0071] The closure member 2 includes a cover plate 21 sleeved inside the inner cavity of the bamboo material 20, and a rubber ring 22 installed on the cover plate 21 and located inside the inner cavity of the bamboo material 20; an observation hole 211 communicating with the inner cavity of the bamboo material 20 is provided on the cover plate 21.

[0072] After assembly, the observation hole 211 will be located above the outside of the bamboo material 20. After the grout in the inner cavity of the bamboo material 20 is in place, the grout will flow outwards from the observation hole 211, so that the operator can judge whether it is full;

[0073] The rubber ring 22 has good deformation performance, so as to seal the gap between the cover plate 21 and the bamboo material 20;

[0074] In some possible implementation manners,

[0075] Such as Figure 2 As shown, generally, when the bamboo material 20 is connected to the steel structure 10, multiple groups of bamboo materials 20 form a structure with a rectangular or circular cross-section;

[0076] When a cross-section formed by multiple groups of bamboo materials 20 is rectangular, the fixing members 1 are arranged in a rectangular array on the side surface of the steel structure 10; wherein the fixing member 1 includes an upper fixing member arranged vertically, several groups of intermediate fixing members, and a lower fixing member.

[0077] The intermediate fixing member can be a multi-layer structure arranged parallel to the upper fixing member and the lower fixing member, but the upper fixing member and the lower fixing member are each one layer; of course, the intermediate fixing member can also not be provided; it only needs to be determined according to the structure formed by the bamboo material 20.

[0078] In some possible implementation manners,

[0079] The upper fixing member and the lower fixing member have the same structure, including multiple groups of steel plates 11 arranged horizontally in parallel and installed on the steel structure 10, and the free ends of the steel plates 11 are inserted into the corresponding inner cavities of the bamboo materials 20; the connecting member 3 is a long bolt 31, and one end of it will pass through all the corresponding steel plates 11 and the bamboo material 20 of the upper fixing member / lower fixing member.

[0080] Through the long bolt 31 corresponding to the upper fixing member, the upper bamboo materials corresponding to the upper fixing member are connected to all the steel plates 11, so as to form a stable connection integral body;

[0081] Similarly, through the long bolt 31 corresponding to the lower fixing member, the lower bamboo materials corresponding to the lower fixing member are connected to all the steel plates 11, so as to form a stable connection integral body.

[0082] In some possible implementation manners,

[0083] The middle layer fixing member includes two steel plates II 13 arranged in parallel and mounted on the steel structure 10, and a steel pipe 12 located between the two steel plates II 13; there are two sets of the connecting members 3 and they are arranged in one-to-one correspondence with the steel plates II 13; the connecting member 3 is a short bolt 32.

[0084] The short bolt 32 is mainly used for connecting a set of bamboo materials 20 outside a set of steel plates II 13 and the corresponding steel plate II 13; the steel pipe 12 located between the steel plates II 13 is not fixed by the short bolt 32; combined with the fixation of the upper fixing member 1 and the lower fixing member 1, it forms a structure that only fixes the outer bamboo materials, and the inner bamboo materials can be directly sleeved outside the steel pipe 12; this setting can effectively reduce the construction difficulty of the inner bamboo materials while ensuring the connection strength (due to the wrapping of the outer bamboo materials around the inner bamboo materials, it is extremely difficult to use the connecting member 3 to connect the inner bamboo materials and the steel pipe 12), greatly improving the construction efficiency and reducing the construction cost.

[0085] Embodiment 2:

[0086] A construction method for the connection node structure of a steel-bamboo composite structure, the specific process is: welding the steel plates and / or the steel pipe 12 to the steel structure 10 → sleeving the capping on the steel plates and / or the steel pipe 12 → installing the lower layer bamboo materials → drilling holes in the lower layer bamboo materials → installing the long bolt 31 and the closure 2 → grouting the lower layer bamboo materials → drilling holes and installing the short bolt 32 for the middle outer bamboo materials → grouting the middle outer bamboo materials → constructing the upper layer bamboo materials.

[0087] Specifically, it includes the following steps:

[0088] Step S1: Installing the fixing member 1 and the closure 2;

[0089] Weld the fixing member 1 on the side of the steel beam according to the shape formed by the final end faces of the bamboo materials 20;

[0090] Sleeve the closure 2 on the outside of the fixing member 1. The number of closures 2 is equal to and in one-to-one correspondence with the number of bamboo materials 20 and the number of fixing members 1. It is mainly used to seal the inner cavity of the bamboo materials 20 to avoid grouting;

[0091] Step S2: Installing and grouting the lower layer bamboo materials corresponding to the lower layer fixing member; specifically referring to:

[0092] Step S21: Sleeve the hoop on the outside of each lower layer bamboo material; and ensure that the connecting member 3 and the grouting hole are located between two sets of hoops of the same bamboo material 20;

[0093] Step S22: Sleeve the lower layer bamboo materials on the outside of the corresponding steel plates I 11 respectively and carry out temporary support, and at the same time bundle and fix all the bamboo materials 20 of this layer with belts;

[0094] Step S23: Drill holes in the lower-layer bamboo materials, and make the hole positions on the same horizontal plane as those of the first steel plate 11;

[0095] When drilling holes, the drill rod should be kept horizontal. After drilling through one side wall of the first bamboo material 20, stop drilling. Insert the drill rod into the hole of the first steel plate 11. Observe whether the drill rod is horizontal. If not, adjust the hole to ensure that the drilled hole is at the same horizontal position as the hole on the first steel plate 11;

[0096] Only when the holes in the bamboo material 20 are aligned with the holes in the first steel plate 11 can the subsequent holes be drilled continuously; each time a hole is drilled, it is necessary to verify whether the bamboo hole is aligned with the hole on the first steel plate 11 to ensure that all the drilled holes are aligned with the holes on the first steel plate 11, so as to ensure that the long bolts 31 can pass through smoothly.

[0097] Step S24: Use long bolts 31 to fixedly connect all the lower-layer bamboo materials and all the first steel plates 11, and insert the seal 2 into the inner cavity of the bamboo material 20, and control the observation hole 211 to face upward;

[0098] Step S25: Seal the gaps between the drilled holes and the long bolts 31, and the gaps between the seal 2 and the bamboo material 20 and the first steel plate 11 respectively;

[0099] Specifically, use sealant for sealing to prevent slurry leakage after grouting;

[0100] Step S26: Grout through the grouting hole. When slurry flows out of the observation hole 211, stop grouting;

[0101] Step S3: Install and grout the intermediate bamboo materials 20 corresponding to the intermediate fixing parts;

[0102] The said step S3 specifically includes the following steps:

[0103] Step S31: Install and grout the intermediate outer bamboo materials corresponding to the second steel plate 13 in the intermediate fixing parts; specifically includes the following steps:

[0104] Step S311: Fit hoop on the outside of each intermediate outer bamboo material, and ensure that the connecting piece 3 and the grouting hole are located between two hoops of the same bamboo material 20;

[0105] Step S312: Place short bamboo between two intermediate outer bamboo materials to form a whole and fix it to the lower-layer bamboo materials by bundling with a belt;

[0106] The purpose of setting the short bamboo is to prevent the bamboo material 20 being drilled from shifting due to the support structure during the drilling of the intermediate outer bamboo materials, resulting in inaccurate hole drilling;

[0107] Step S313: Perform hole opening on the two middle outer bamboo materials, and make the hole positions on the same horizontal plane as those of the second steel plate 13;

[0108] Step S314: Use short bolts 32 to fixedly connect the middle outer bamboo materials with the corresponding second steel plates 13, and insert the closures 2 into the inner cavities of the bamboo materials 20, with the observation holes 211 facing upwards;

[0109] Step S315: Seal all the gaps with sealant;

[0110] Step S316: Perform grouting through the grouting holes;

[0111] Step S32: Install and grout the middle inner bamboo materials corresponding to the steel pipes 12;

[0112] The specific steps of Step S32 are as follows:

[0113] Step S321: Slip the middle inner bamboo materials onto the outside of the steel pipes 12;

[0114] Step S322: Use the closures 2 to seal one side of the middle inner bamboo materials close to the steel beams;

[0115] Step S323: Perform grouting through the grouting holes;

[0116] Step S4: Install and grout the upper bamboo materials corresponding to the upper fixing parts; the installation and grouting of the upper bamboo materials are the same as those of the upper bamboo materials; specifically, the following steps are included:

[0117] Step S41: Slip the hoop onto the outside of each upper bamboo material;

[0118] Step S42: Slip the upper bamboo materials onto the outside of the corresponding first steel plates 11 respectively and perform temporary support, and at the same time, bundle and fix all the bamboo materials 20 in this layer with belts;

[0119] Step S43: Perform hole opening on the upper bamboo materials, and make the hole positions on the same horizontal plane as those of the first steel plates 11 in the upper fixing parts;

[0120] Step S44: Use long bolts 31 to fixedly connect all the upper bamboo materials with all the first steel plates 11, and insert the closures 2 into the inner cavities of the bamboo materials 20, with the observation holes 211 facing upwards;

[0121] Step S45: Seal the gaps between the hole openings and the long bolts 31, and the gaps between the closures 2 and the bamboo materials 20 and the first steel plates 11 respectively;

[0122] Step S46: Perform grouting through the grouting holes;

[0123] Step S5: The construction is completed.

[0124] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature or any new combination disclosed in this specification, as well as to any new method or process step or any new combination disclosed.

Claims

1. A connecting node structure for a steel-bamboo composite structure, which is used for connecting bamboo materials and steel structures, and is characterized in that, It includes multiple groups of fixing parts installed on the steel structure with one end extending into the inner cavity of the bamboo, a sealing part sleeved on each group of fixing parts and used for sealing one end of the bamboo close to the steel structure, a connecting part used to connect the fixing parts and the bamboo, and grouting material filled in the inner cavity of the bamboo; Two groups of hoop fasteners are sleeved on the outer side of the bamboo, and the two groups of hoop fasteners are arranged along the axial direction of the bamboo; The connecting parts are respectively located between the two groups of hoop fasteners; A grouting hole is arranged on the bamboo; The grouting hole is located between the two groups of hoop fasteners; The sealing part includes a cover plate sleeved in the inner cavity of the bamboo and a rubber ring installed on the cover plate and located in the inner cavity of the bamboo; An observation hole communicating with the inner cavity of the bamboo is arranged on the cover plate; The fixing parts are arranged in a rectangular array on the side of the steel structure; Wherein the fixing part includes an upper fixing part arranged vertically, several groups of middle-layer fixing parts, and a lower fixing part; The upper fixing part and the lower fixing part have the same structure, including multiple groups of steel plates I arranged in parallel along the horizontal direction and installed on the steel structure, and one end of the steel plate I is inserted into the corresponding inner cavity of the bamboo; The connecting part is a long bolt, and one end of it will pass through all the corresponding steel plates I of the upper fixing part / lower fixing part and the bamboo. The middle-layer fixing part includes two steel plates II arranged in parallel and installed on the steel structure, and a steel pipe located between the two steel plates II; There are two groups of connecting parts and they are arranged in one-to-one correspondence with the steel plates II; The connecting part is a short bolt.

2. A construction method for the connection node structure of a steel-bamboo composite structure according to claim 1, characterized in that, Specifically, it includes the following steps: Step S1: Installation of fixing parts and sealing parts; Step S2: Installation and grouting of the lower-layer bamboo corresponding to the lower fixing part; Specifically, it means: Step S21: Sleeve the hoop fastener on the outer side of each lower-layer bamboo. Step S22: Sleeve the lower-layer bamboo on the outer side of the corresponding steel plate I respectively and carry out temporary support, and at the same time tie and fix all the bamboos in this layer. Step S23: Drill holes in the lower-layer bamboo and make the hole positions on the same horizontal plane as the hole positions of the steel plate I. Step S24: Use long bolts to fixedly connect all the lower-layer bamboos and all the steel plates I, and plug the sealing part into the inner cavity of the bamboo, and control the observation hole to face upward. Step S25: Seal the gaps between the openings and the long bolts, and between the sealing part and the bamboo and the steel plate I respectively. Step S26: Grout through the grouting hole. Step S3: Installation and grouting of the middle-layer bamboo corresponding to the middle-layer fixing part; Step S4: Installation and grouting of the upper-layer bamboo corresponding to the upper fixing part; Step S5: Construction is completed.

3. The construction method of a connection node structure of a steel-bamboo composite structure according to claim 2, characterized in that, The specific steps of step S3 include the following steps: Step S31: Installation and grouting of the middle outer bamboo corresponding to the steel plate II in the middle-layer fixing part; Specifically, it includes the following steps: Step S311: Sleeve the hoop fastener on the outer side of each middle outer bamboo. Step S312: Place short bamboos between two middle outer bamboos to form a whole and tie and fix it with the lower-layer bamboo. Step S313: Drill holes in the two middle outer bamboos and make the hole positions on the same horizontal plane as the hole positions of the steel plate II. Step S314: Use short bolts to fixedly connect the middle outer bamboo and the corresponding steel plate II, and plug the sealing part into the inner cavity of the bamboo, and control the observation hole to face upward. Step S315: Seal all the gaps; Step S316: Grout through the grouting holes; Step S32: Install and grout the bamboo in the middle inner side corresponding to the steel pipe.

4. The construction method of a connection node structure of a steel-bamboo composite structure according to claim 3, characterized in that, The specific description of Step S32 is as follows: Step S321: Sleeve the middle inner bamboo on the outer side of the steel pipe; Step S322: Seal the side of the middle inner bamboo close to the steel beam with a sealing member; Step S323: Grout through the grouting holes.

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