Concrete connecting structure and construction method thereof

Abstract

The application discloses a concrete connecting structure and a construction method thereof, relates to the field of structural engineering, and aims to solve the problem of high maintenance difficulty of a reinforced concrete beam and a reinforced concrete structure connected through a hinged mode. The concrete connecting structure comprises a support, a beam and a connecting joint. The concrete support of the support and the concrete beam of the beam are distributed at intervals along a first straight line direction. One end of each node longitudinal reinforcement of the connecting joint is anchored and connected with the concrete support, and the other end of each node longitudinal reinforcement is anchored and connected with the concrete beam. A concrete connecting piece is filled between the concrete support and the concrete beam along the first straight line direction and connects the concrete support and the concrete beam. The node longitudinal reinforcement between the concrete support and the concrete beam is located in the concrete connecting piece, and the linear rigidity of the connecting joint is smaller than that of the beam. The concrete connecting structure is used for connecting the support and the beam.

Description

[0001] This application claims priority to Chinese Patent Application No. 202211177199.6, filed with the State Intellectual Property Office of China on September 26, 2022, entitled "A Concrete Connection Structure and Construction Method Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of structural engineering, and more particularly to a concrete connection structure and its construction method. Background Technology

[0003] To connect reinforced concrete beams and reinforced concrete structures via hinges, steel nodes can be embedded in both the beams and the structure, with the hinged connection between the two nodes achieving the hinged connection between them. However, this exposes the steel nodes to air for extended periods, requiring additional corrosion and rust prevention maintenance, thus increasing the overall maintenance complexity of the structure. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete connection structure and its construction method, which aims to solve the problem of high maintenance difficulty of reinforced concrete beams and reinforced concrete structures connected by hinges.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, some embodiments of this application provide a concrete connection structure, including a support, a beam, and a connection node. The support includes a concrete support, and the beam includes a concrete beam, with the concrete beam and the concrete support spaced apart along a first straight line. The connection node includes a concrete connector and multiple longitudinal reinforcement bars; one end of each longitudinal reinforcement bar is anchored to the concrete support, and the other end of each longitudinal reinforcement bar is anchored to the concrete beam; the concrete connector fills the space between the concrete support and the concrete beam along the first straight line and connects the concrete support and the concrete beam; the longitudinal reinforcement bars between the concrete support and the concrete beam are located within the concrete connector; the linear stiffness of the connection node is less than the linear stiffness of the beam.

[0007] Therefore, in the concrete connection structure provided in this application embodiment, the linear stiffness of the connection node is less than that of the beam. That is, the bending stiffness between the support and the beam connected through the connection node is necessarily less than the bending stiffness when the beam is directly connected to the support. In other words, the connection node between the support and the beam exerts less bending constraint on the beam ends, thus allowing the beam and support to approximately achieve a hinged connection, which is beneficial for releasing bending moment stress through the beam ends.

[0008] Furthermore, the multiple longitudinal reinforcement nodes filled in the concrete connectors can serve as the skeleton structure of the connectors, thereby improving the structural strength of the connection nodes. Also, since the upper and lower ends of the node longitudinal reinforcement are inserted into and anchored within the concrete beam and concrete support respectively, it helps to improve the integrity of the concrete beam and support. Simultaneously, through the casting and shaping of multiple node longitudinal reinforcements and concrete, the support, connection node, and beam can be connected into a single structure, thus improving the overall integrity of the concrete connection structure.

[0009] Compared to existing technologies that expose steel joints for hinged connections, in this embodiment, the longitudinal reinforcement of the joint, which may be a metal structure, is completely enclosed by concrete connectors, concrete beams, and concrete supports, and is not exposed to the air. Therefore, no anti-corrosion and rust prevention maintenance is required for the longitudinal reinforcement. Furthermore, the exposed concrete connectors are all concrete structures, eliminating the need for metal anti-corrosion and rust prevention measures. Thus, the concrete connection structure provided in this embodiment eliminates the need for additional maintenance such as metal anti-corrosion and rust prevention compared to existing technologies, further reducing the difficulty of maintaining the concrete connection structure and saving maintenance costs.

[0010] Optionally, the linear stiffness of the beam is a, the linear stiffness of the connecting node is b, and 5 ≤ a / b ≤ 20.

[0011] Optionally, along the first straight line direction, the linear stiffness of the connecting node is directly proportional to the moment of inertia of the connecting node's cross section, and inversely proportional to the length of the connecting node. The beam extends along the second straight line direction, and the beam's linear stiffness is directly proportional to the beam's moment of inertia of its cross section, and inversely proportional to the beam's length.

[0012] Optionally, the connection node also includes multiple node stirrups. The longitudinal reinforcement of the node is parallel to the first straight line direction, and the multiple node longitudinal reinforcements are distributed at intervals around the central axis parallel to the first straight line direction. The multiple node stirrups are distributed at intervals along the first straight line direction, and each node stirrup is connected to multiple node longitudinal reinforcements; the multiple node stirrups are set inside the concrete connector.

[0013] Optionally, along the first straight line direction, at least some of the longitudinal reinforcement bars at the nodes are bent at one end into the beam towards the direction of the connection node.

[0014] Optionally, along the first straight line direction, at least some of the longitudinal reinforcement bars at the nodes are bent at one end inserted into the support towards the direction of the connection node.

[0015] Optionally, the first straight line direction is parallel to the vertical direction. Along the vertical direction, the lower side of the beam near the support is connected to the upper side of the concrete connector, and the lower side of the concrete connector is connected to the upper side of the support.

[0016] Optionally, the support includes a first support and a top support segment connected sequentially in the vertical direction, with the top support segment located above the first support. In the vertical direction, the upper end of the connecting node is connected to the beam, and the lower end of the connecting node is connected to the right side region of the upper side of the first support. The vertical projection area of ​​the top support segment on the first support is spaced apart from the vertical projection area of ​​the beam on the first support.

[0017] Optionally, the support includes a first support and a second support, the second support being connected to one side of the first support along a fourth straight line direction, and the fourth straight line direction being perpendicular to the vertical direction. Along the vertical direction, the upper end of the connecting node is connected to the beam, the lower end of the connecting node is connected to the second support, and there is a gap between the beam and the first support along the fourth straight line direction.

[0018] Optionally, the beam also includes multiple longitudinal reinforcement bars, the length direction of which is parallel to the second straight line direction. The multiple longitudinal reinforcement bars are distributed at intervals around the central axis parallel to the second straight line direction, and the multiple longitudinal reinforcement bars are set inside the concrete beam. The second straight line direction is the length direction of the beam.

[0019] Optionally, the support also includes multiple longitudinal reinforcement bars, the length direction of which is parallel to the third straight line direction, the multiple longitudinal reinforcement bars are distributed at intervals around the central axis parallel to the third straight line direction, and the multiple longitudinal reinforcement bars are set inside the concrete support, the third straight line direction being the length direction of the support.

[0020] Optionally, at least some of the longitudinal reinforcement at the nodes is connected at one end within the beam to one or more longitudinal reinforcements of the beam.

[0021] Optionally, the beam also includes multiple beam stirrups, which are spaced apart along the second straight line, and each beam stirrup is connected to multiple beam longitudinal bars, and the multiple beam stirrups are set inside the concrete beam.

[0022] Optionally, at least some of the longitudinal reinforcement bars at the nodes are connected at one end within the support to one or more support longitudinal reinforcement bars.

[0023] Optionally, the support also includes multiple support stirrups, which are spaced apart along a third straight line, and each support stirrup is connected to multiple support longitudinal bars, which are placed inside the concrete beam.

[0024] On the other hand, embodiments of this application also provide a construction method for a concrete connection structure, used to fabricate the concrete connection structure described above, the construction method comprising:

[0025] The mold for the support is made, multiple node longitudinal bars are positioned and installed, and one end of the multiple node longitudinal bars is located inside the mold of the support. Concrete is poured into the mold of the support to form a support that anchors the multiple node longitudinal bars.

[0026] A mold for making the connection node is used. Multiple longitudinal reinforcement bars of the connection node pass through the mold of the connection node, and concrete is poured into the mold of the connection node to form the connection node.

[0027] Make a support mold for the beam, and place the other end of the longitudinal reinforcement at multiple nodes inside the support mold of the beam, and pour concrete into the support mold of the beam to form a beam that anchors the longitudinal reinforcement at multiple nodes.

[0028] Since the construction method of the concrete connection structure provided in this application embodiment is used to make the concrete connection structure in the previous aspect, the two can solve the same technical problem and achieve the same technical effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A front view of a concrete connection structure provided for an embodiment of this application;

[0031] Figure 2 for Figure 1 A front sectional view of the concrete connection structure shown in the figure;

[0032] Figure 3 for Figure 2 The diagram shows a top-down cross-sectional view of a connection node.

[0033] Figure 4 for Figure 2 The second type of connection node shown is represented by a top-down cross-sectional view;

[0034] Figure 5 for Figure 1 A second front sectional view of the concrete connection structure shown;

[0035] Figure 6 A front view of a second type of concrete connection structure provided in an embodiment of this application;

[0036] Figure 7 A front view of a third type of concrete connection structure provided in the embodiments of this application;

[0037] Figure 8 This is a structural schematic diagram of the fourth type of concrete connection structure provided in the embodiments of this application;

[0038] Figure 9This is a flowchart illustrating a construction method for a concrete connection structure provided in an embodiment of this application.

[0039] Figure label:

[0040] 100 - Concrete connection structure;

[0041] 1-Support; 11-Concrete support; 12-Longitudinal reinforcement of support; 13-Stirrups of support; 14-First support; 15-Top section of support; 16-Second support;

[0042] 2-Beam; 21-Concrete beam; 22-Longitudinal reinforcement of beam; 23-Stirrups of beam;

[0043] 3-Connection node; 31-Concrete connector; 32-Node longitudinal reinforcement; 33-Node stirrups. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0047] It should be noted that in practical applications, due to limitations in equipment precision or installation errors, achieving absolute parallelism or perpendicularity is difficult. The descriptions of perpendicularity, parallelism, or unidirectional orientation in this application are not absolute limitations, but rather indicate that perpendicular or parallel structural settings can be achieved within a preset error range, thus maximizing the technical effect of the defined features and making the corresponding technical solution easy to implement, exhibiting high feasibility.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] In the embodiments of this application, "exemplarily" is used to indicate that it is an example, illustration, or illustration. Any embodiment or design described as "exemplarily" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of "exemplarily" is intended to present the relevant concepts in a concrete manner.

[0051] On the one hand, such as Figure 1 As shown in the figure, this application embodiment provides a concrete connection structure 100, which may include a support 1, a beam 2, and a connection node 3. The support 1 may be a column, a base structure, or a main beam supporting the beam 2; there is no limitation in this regard. Figure 1 The beam 2 shown is located above the support 1 on one side of the base or column structure, and extends to the right at the end of the beam 2 that is away from the support 1 in a non-vertical direction. In this way, the beam 2 can be distributed at intervals with the support 1 in the vertical direction, and a connecting node 3 is filled between the beam 2 and the support 1 in the vertical direction. The upper end of the connecting node 3 can contact and connect with the lower side of the beam 2, and the lower end of the connecting node 3 can contact and connect with the upper side of the support 1.

[0052] Based on this, the linear stiffness of connection node 3 can be set to be less than that of beam 2. Since linear stiffness refers to the ability of a material or structure to resist elastic deformation under stress, the greater the linear stiffness, the greater the bending stiffness, and the less likely it is to bend; the smaller the linear stiffness, the easier it is to bend. In this way, the smaller the linear stiffness of connection node 3, the less constraint it places on the left end of beam 2. Therefore, the bending moment borne by the left end of beam 2 is smaller, thus making the connection between beam 2 and support 1 approximately hinged, releasing the bending moment at the left end of beam 2.

[0053] It should be noted that, in actual application, unless otherwise specified, the concrete connection structure 100 provided in this application embodiment can be installed and manufactured in the vertical direction (i.e., parallel to the first straight line direction) in the up-down direction.

[0054] To improve the structural strength of connection node 3, refer to Figure 2 , Figure 2 for Figure 1 The diagram shows a front sectional view of the concrete connection structure 100. Support 1 includes a concrete support 11, beam 2 includes a concrete beam 21, and connection node 3 includes a concrete connector 31 and multiple longitudinal reinforcement bars 32. The concrete support 11, concrete beam 21, and concrete connector 31 are all structures formed by solidifying concrete, possessing good structural strength. Thus, the lower end of each longitudinal reinforcement bar 32 can be anchored to the concrete support 11, and the upper end of each longitudinal reinforcement bar 32 can be anchored to the concrete beam 21, meaning that some or all of the longitudinal reinforcement bars 32 can extend vertically. Simultaneously, the concrete connector 31 can fill the space between the concrete support 11 and the concrete beam 21 vertically, allowing a portion of the longitudinal reinforcement bars 32 located between the concrete support 11 and the concrete beam 21 to be located within the longitudinal reinforcement bars 32 of the concrete connector 31. That is, the upper side of the concrete connector 31 can contact and connect with the lower side of the beam 2, and the lower side of the concrete connector 31 can connect with the upper side of the support 1.

[0055] Therefore, the multiple longitudinal reinforcement bars 32 filled in the concrete connector 31 can serve as the skeleton structure of the concrete connector 31, thereby improving the structural strength of the connection node 3. Furthermore, since the upper and lower ends of the longitudinal reinforcement bars 32 are inserted into the concrete beam 21 and the concrete support 11 respectively and anchored, it is beneficial to improve the integrity of the concrete beam 21 and the concrete support 11. Simultaneously, through the casting and shaping of the multiple longitudinal reinforcement bars 32 and the concrete, the support 1, the connection node 3, and the beam 2 can be connected into a single structure, which is beneficial to increasing the tensile and compressive stresses of the connection node and improving the overall integrity of the concrete connection structure 100.

[0056] Based on this, compared to the existing connection schemes where steel nodes are directly exposed for hinged joints, in this embodiment, even if the longitudinal reinforcement 32 of the connection node 3 is made of metal, it is completely covered by the concrete connector 31, concrete beam 21, and concrete support 11, and is not exposed to the air. Therefore, no anti-corrosion and anti-rust maintenance is required for the longitudinal reinforcement 32. Furthermore, the exposed concrete connectors 31 of the connection node 3 are all concrete structures, and therefore, no anti-corrosion and anti-rust maintenance is required. Thus, the concrete connection structure 100 provided in this embodiment does not require additional maintenance such as anti-corrosion and anti-rust maintenance compared to existing solutions, further reducing the difficulty of maintenance and saving maintenance costs.

[0057] It should be noted that anchorage connection refers to the end of the longitudinal reinforcement being encased in concrete, thereby strengthening the connection between the concrete and the longitudinal reinforcement, making the concrete structure more robust. This also facilitates the joint bearing of various pressures, tensions, torques, and bending moments under loads by both the concrete and the reinforcing steel. In engineering, the term "anchorage length of the reinforcing steel" is commonly used. The anchorage length of the reinforcing steel generally refers to the total length of the stressed reinforcing steel in beams, slabs, columns, etc., extending into the support or foundation, including straight and bent portions. The location and form of anchorage can be hooks, bends, etc., or it can refer to the length of the reinforcing steel anchored into the component. Without sufficient anchorage length, the internal force of the reinforcing steel cannot be effectively transferred to the anchorage body. To ensure the force transmission effect of the reinforcing steel, in this embodiment, the preset lengths at both ends of the node longitudinal reinforcement 32 inserted into the beam 2 and support 1 are greater than or equal to the anchorage length of the node longitudinal reinforcement 32.

[0058] For example, such as Figure 2 As shown, to improve the anchorage effect between the upper end of the longitudinal reinforcement 32 and the concrete beam 21, some or all of the longitudinal reinforcement 32 can be inserted into the upper end of the beam 2 and bent downwards. Correspondingly, to improve the anchorage effect between the lower end of the longitudinal reinforcement 32 and the concrete support 11, some or all of the longitudinal reinforcement 32 can be inserted into the lower end of the support 1 and bent upwards. The bending angles at both ends of the longitudinal reinforcement 32 only need to be greater than 0° and less than 180°, such as 30°, 45°, 60°, 90°, 120°, 135°, and 150°, all of which are beneficial to improving the connection strength between the upper and lower ends of the longitudinal reinforcement 32, and no specific limitation is imposed.

[0059] In some embodiments, to improve the shear strength of the connecting node 3, such as Figure 2As shown, the connecting node 3 may also include multiple node stirrups 33, which may be approximately ring-shaped structures such as square rings, circular rings, and triangular rings. Thus, multiple node stirrups 33 may be distributed at intervals along the vertical direction and located between the concrete beam 21 and the concrete support 11, and the concrete connector 31 may simultaneously cover multiple node longitudinal bars 32 and all node stirrups 33.

[0060] It should be noted that, in this embodiment, multiple node longitudinal reinforcement bars 32 can be installed within the support mold of the connecting node 3, and multiple node stirrups 33 can be connected to the multiple node longitudinal reinforcement bars 32 at predetermined positions. Subsequently, concrete can be poured into the support mold. After the concrete solidifies, the solidified concrete becomes a concrete connector 31 that covers the multiple node longitudinal reinforcement bars 32 and all the node stirrups 33, together forming the connecting node 3. This is equivalent to multiple node longitudinal reinforcement bars 32 and all the node stirrups 33 being disposed within the concrete connector.

[0061] Based on this, refer to Figure 3 , Figure 3 for Figure 2 The diagram shows a top-down sectional view of a connection node 3. Multiple longitudinal reinforcement bars 32 can be spaced apart around a central axis parallel to the vertical direction, and each node stirrup 33 can be connected to some or all of the longitudinal reinforcement bars 32. This connection can be achieved through wire binding, welding, or other connecting components. Thus, multiple longitudinal reinforcement bars 32 and multiple node stirrups 33 can be connected to form a cylindrical structural framework with its central axis parallel to the vertical direction. Concrete can be poured to form a cylindrical concrete connector that simultaneously fills and covers both the longitudinal reinforcement bars 32 and the stirrups 33. Therefore, by setting multiple longitudinal reinforcement bars 32 and multiple node stirrups 33 to form a stable framework, and then pouring concrete on this framework to create a concrete connector 31, the connection node 3 is formed.

[0062] In addition, such as Figure 4 As shown, Figure 4 for Figure 2 Another type of connection node shown is a top-down sectional view. Multiple longitudinal reinforcement bars 32 and multiple stirrups 33 can be used to form a cuboid skeleton with its central axis approximately parallel to the vertical direction, and concrete can be poured onto this skeleton to form the cuboid connection node 3. Alternatively, concrete connectors 31 can be fabricated to form structures approximating triangular prisms, quadrangular prisms, pentagonal prisms, etc., without limitation.

[0063] In some embodiments, in order to improve the load-bearing capacity of beam 2, such as Figure 5 As shown, Figure 5 for Figure 1The second front sectional view of the concrete connection structure 100 shown indicates that the second straight line direction can be parallel to the left-right direction. The beam 2 may also include multiple longitudinal reinforcement bars 22, which can be spaced apart within the concrete beam 21. Exemplarily, some or all of the longitudinal reinforcement bars 22 can be parallel to the left-right direction, and the multiple longitudinal reinforcement bars 22 can be spaced apart around a central axis parallel to the left-right direction. Thus, by using the multiple longitudinal reinforcement bars 22 as the supporting framework of the concrete beam 21, the tensile, compressive, and bending bearing capacities of the beam 2 can be improved.

[0064] Continue to refer to Figure 5 The beam 2 may also include multiple beam stirrups 23, which can be approximated as triangular rings, rectangular rings, circular rings, or other ring-shaped structures. The multiple beam stirrups 23 can be spaced apart along the left-right direction, and each beam stirrup 23 can be connected to some or all of the beam longitudinal reinforcement 22, such as by binding with wire, welding, or other connecting components for the connection between the beam longitudinal reinforcement 22 and the beam stirrups 23. In this way, the multiple beam longitudinal reinforcement 22 and the multiple beam stirrups 23 can be connected to form a framework of regular or irregular structures such as triangular prisms, quadrangular prisms, or cylinders with the central axis parallel to the left-right direction. Concrete can be poured to form a concrete beam 21, so that the beam longitudinal reinforcement 22 and all the beam stirrups 23 can be located within the concrete beam 21, the length direction of which can be the left-right direction. Therefore, by connecting and installing multiple longitudinal bars 22 and multiple stirrups 23, a stable skeleton structure can be formed. After the concrete beam 21 is filled and solidified, it can prevent the longitudinal bars 22 and stirrups 23 from contacting the air. This not only improves the shear strength of beam 2, but also further improves the load-bearing capacity of beam 2.

[0065] It should be noted that, when beam 2 includes longitudinal reinforcement 22, the upper ends of some or all of the longitudinal reinforcement 32 anchored in the concrete beam 21 can be directly placed in the concrete beam 21, or they can be connected in contact with one or more longitudinal reinforcement 22, or in contact with one or more stirrups 23, which is beneficial to improving the anchorage effect between the connection node 3 and beam 2. This application does not limit this.

[0066] To improve the bearing capacity of support 1, such as Figure 5 As shown, the third straight line direction can be parallel to the vertical direction, i.e., the length direction of support 1. Support 1 may also include multiple longitudinal reinforcement bars 12, which can be spaced apart within the concrete support 11. Exemplarily, some or all of the longitudinal reinforcement bars 12 can be parallel to the vertical direction, and the multiple longitudinal reinforcement bars 12 can be spaced apart around a central axis parallel to the vertical direction. In this way, by using multiple longitudinal reinforcement bars 12 as the supporting skeleton of the concrete support 11, the tensile, compressive, and bending bearing capacity of support 1 can be improved.

[0067] Continue to refer to Figure 5 The support 1 may also include multiple support stirrups 13, which can be approximately regular or irregular ring structures such as triangular rings, rectangular rings, or circular rings. The multiple support stirrups 13 can be spaced apart along the vertical direction, and each support stirrup 13 can be connected to some or all of the support longitudinal bars 12, such as by binding with wire, welding, or other connecting components for the connection between the support longitudinal bars 12 and the support stirrups 13. In this way, the multiple support longitudinal bars 12 and support stirrups 13 can be connected to form a framework of regular or irregular structures such as triangular prisms, quadrangular prisms, or cylinders with the central axis parallel to the left-right direction. A concrete support 11 can be formed by pouring concrete, so that the support longitudinal bars 12 and all the support stirrups 13 can be located within the concrete support 11, the length direction of which can be vertical. Therefore, by connecting and installing multiple support longitudinal bars 12 and multiple support stirrups 13, a stable skeleton structure can be formed. After the concrete support 11 is filled and solidified, the concrete support 11 can prevent the support longitudinal bars 12 and support stirrups 13 from contacting the air. This not only improves the shear strength of the support 1, but also further improves the bearing capacity of the support 1.

[0068] It should be noted that when support 1 includes longitudinal reinforcement 12, the lower ends of some or all of the node longitudinal reinforcement 32 anchored in the concrete support 11 can be directly set in the concrete support 11, or they can be connected in contact with one or more longitudinal reinforcement 12, or they can be connected in contact with one or more node stirrups 33, which is beneficial to improving the anchoring effect between the connection node 3 and support 1. This application does not limit this.

[0069] Since the connection node 3 between beam 2 and support 1 can be regarded as a hinged connection structure between the two, compared with the hinged structure where steel nodes are directly set between beam 2 and support 1, the anchored longitudinal reinforcement 32 can be flexibly inserted, without hindering the arrangement of longitudinal reinforcement and stirrups in support 1 and beam 2. The construction difficulty is smaller, and the hinged effect can be achieved, which is conducive to improving construction efficiency.

[0070] In some embodiments, the linear stiffness of beam 2 is defined as 'a', and the linear stiffness of connecting node 3 is defined as 'b'. Thus, by adjusting connecting node 3 and beam 2, 5 ≤ a / b ≤ 20 can be achieved. In this way, the linear stiffness of beam 2 can be approximately 5 to 20 times that of connecting node 3, meaning the bending stiffness of connecting node 3 is much smaller than that of beam 2, insufficient to provide bending constraint to the left end of the beam. This effectively releases the end moment of beam 2, allowing connecting node 3, which connects beam 2 and support 1, to be approximated as a hinged structure.

[0071] If a / b < 5, meaning the difference between the linear stiffness of connection node 3 and beam 2 is not significant, then the effect of releasing the end moment of beam 2 through connection node 3 is poor. If a / b > 20, although the end moment of beam 2 can be effectively released through connection node 3, the structural strength of connection node 3 may be insufficient to support the load distributed on the left end of beam 2, which may damage the concrete connection structure 100.

[0072] It should be noted that the formula for calculating linear stiffness is i = EI / L. Here, for the parameters E, I, and L, E represents the material's elastic modulus, I represents the moment of inertia of the component's cross-section, and L represents the calculated length of the component. The linear stiffness can be adjusted by modifying these three parameters.

[0073] Taking an example where the ratio of the linear stiffness of beam 2 along the second straight line to the linear stiffness of connection node 3 along the first straight line is 5 to 20 times, the material properties of connection node 3 and beam 2 can be changed by adjusting the concrete grade in connection node 3 and beam 2. This, in turn, adjusts the ratio between the elastic modulus of connection node 3 and beam 2, thereby changing the ratio between the linear stiffness of connection node 3 and beam 2.

[0074] Furthermore, taking a rectangular cross-section as an example, the moment of inertia I of the cross-section refers to the square of the cross-sectional width multiplied by the cross-sectional height. Therefore, the linear stiffness of beam 2 is directly proportional to both the elastic modulus of beam 2 and the moment of inertia of its cross-section (i.e., the section perpendicular to the second straight line direction), and inversely proportional to its length in the two straight line directions. Similarly, the linear stiffness of connecting node 3 is directly proportional to both the elastic modulus of connecting node 3 and the moment of inertia of its cross-section (i.e., the section perpendicular to the first straight line direction), and inversely proportional to its length in the first straight line direction.

[0075] Therefore, with Figure 1 Taking the cross-sections of connecting node 3 and beam 2 as rectangular as shown in the diagram, we can define the width of the right side of connecting node 3 in the front-to-back direction as the width of the cross-section of connecting node 3, and the height of connecting node 3 in the left-to-right direction as the height of the cross-section of connecting node 3. Similarly, the width of the lower side of beam 2 in the front-to-back direction is the width of the cross-section of beam 2, and the height of beam 2 in the vertical direction is the height of the cross-section of beam 2.

[0076] Based on this, for connection node 3, while keeping other parameters of connection node 3 unchanged, the linear stiffness of connection node 3 can be reduced by decreasing at least one of the parameters of the width and height of its cross-section. Alternatively, the linear stiffness of connection node 3 can be reduced by increasing its length in the first straight direction. Conversely, decreasing its length will increase its linear stiffness. For beam 2, while keeping other parameters of beam 2 unchanged, the linear stiffness of beam 2 can be increased by increasing at least one of the parameters of the width and height of its cross-section. Alternatively, the linear stiffness of beam 2 can be increased by decreasing its length in the second straight direction, and vice versa.

[0077] For example, in practical applications, the length of the connecting node 3 along the first straight line is much smaller than the length of the beam 2. Therefore, if the linear stiffness of the beam 2 is to be 5 to 20 times that of the connecting node 3, it is necessary to adjust accordingly to further increase at least one parameter of the width and height of the beam 2's cross-section, or to adjust accordingly to further decrease at least one parameter of the width and height of the connecting node 3's cross-section, so that the moment of inertia of the beam 2's cross-section is much greater than 5 to 20 times that of the connecting node 3's cross-section, in order to counteract the inverse relationship between the length of the connecting node 3 and the length of the beam 2, so that the linear stiffness of the beam 2 is 5 to 20 times that of the connecting node 3's linear stiffness.

[0078] It should be noted that this applies when the moment of inertia of the cross-section of beam 2 is greater than 5 to 20 times that of the cross-section of connection node 3. Since the moment of inertia of a cross-section is the square of the cross-sectional width multiplied by the cross-sectional height of the member, the relationship between the cross-sections of beam 2 and connection node 3 can be such that the area of ​​the cross-section of beam 2 is equal to the area of ​​the cross-section of connection node 3, or the area of ​​the cross-section of beam 2 is greater than the area of ​​the cross-section of connection node 3, or the area of ​​the cross-section of beam 2 is smaller than the area of ​​the cross-section of connection node 3. All of these options satisfy the condition that the moment of inertia of the cross-section of beam 2 is greater than 5 to 20 times that of the cross-section of connection node 3. This application does not impose any limitations on this.

[0079] In some other embodiments, such as Figure 6As shown, support 1 may further include a first support 14 and a support top section 15 connected sequentially from bottom to top. The length directions of the first support 14 and the support top section 15 may both be parallel to the vertical direction or parallel to the front-back direction (not shown in the figure), and this is not limited. Since the support top section 15 can be connected to the upper side of the first support 14 and distributed to the left, the right side area of ​​the upper side of the first support 14 can be left unoccupied. That is, the lower end of the connecting node 3 can be connected to the right side area of ​​the upper side of the first support 14, and the left end of the beam 2 can be moved to the left closer to the support top section 15, and the lower side of the left end of the beam 2 can be connected to the upper end of the connecting node 3. This allows the beam 2 to form an approximately hinged connection structure with the first support 14 through the connecting node 3.

[0080] Simultaneously, the top section 15 of the support and the beam 2 can be separated from each other in the vertical projection area of ​​the first support 14 from top to bottom, that is, the two vertical projection areas can be distributed alternately in the left and right directions. This is equivalent to creating a gap between the left end of the beam 2 and the right side of the top section 15 of the support, thereby preventing the top section 15 of the support from contacting the beam 2 and hindering the release of the end bending moment of the beam 2.

[0081] Or, as Figure 7 As shown, support 1 may include a first support 14 and a second support 16. The right side of the first support 14 can be connected to and mounted on the second support 16. The first support 14 can extend vertically, and the corresponding support structure for the second support 16 can be of a suitable size. Alternatively, both the first support 14 and the second support 16 can extend horizontally (not shown in the figure), without limitation. Thus, since the upper side of the second support 16 in the vertical direction is not occupied, the lower end of the connecting node 3 can be connected to the upper side of the second support 16, and the left end of beam 2 can be moved to the left closer to the first support 14, with the lower side of the left end of beam 2 connected to the upper end of the connecting node 3. This allows beam 2 to form an approximately hinged connection structure with the second support 16 through the connecting node 3. Furthermore, in the horizontal direction, there can be a gap between the left end of beam 2 and the right side of the first support 14 to facilitate the release of end bending moment of beam 2.

[0082] It should be noted that, in Figure 7 In the illustrated embodiment, the second support 16 can be connected to the right side of the first support 14 in the left-right direction; alternatively, it can be connected to the left side, with the side of the right end of the beam 2 connected to the upper side of the second support 16 via a connecting node 3. In this case, the fourth straight line direction can be parallel to the left-right direction. Alternatively, the second support 16 can also be connected to the front or rear side of the first support 14 in the front-back direction (not shown in the figure), by adjusting the installation position of the beam 2 accordingly. In this case, the fourth straight line direction can be parallel to the front-back direction, and there is no limitation on this.

[0083] In some other embodiments, such as Figure 8 As shown, the length direction of beam 2 can be parallel to the left-right direction, and the corresponding support 1 can be a columnar structure with its length parallel to the up-down direction, or it can be a beam-like structure with its length parallel to the front-back direction. In this case, the first straight line direction can be considered parallel to the left-right direction, allowing the left end face of beam 2 to connect to the right end of connecting node 3, and the left end of connecting node 3 to connect to the right side face of support 1. It is only necessary to increase the structural strength of connecting node 3 to support the weight of beam 2; there are no specific limitations on this.

[0084] It should be noted that, in this embodiment, the main structure of the support longitudinal reinforcement 12, beam longitudinal reinforcement 22, and node longitudinal reinforcement 32 can be approximately a long strip-shaped rod structure or a sheet-like structure, generally made of metal materials such as steel bars or metal strips, or it can be structural steel or angle iron, which ensures structural strength while being inexpensive. The main structure of the support stirrups 13, beam stirrups 23, and node stirrups 33 can be a ring structure, facilitating the connection of multiple corresponding longitudinal reinforcements, and can also be made of metal materials such as steel bars or metal strips.

[0085] On the other hand, this application also provides a construction method for a concrete connection structure, used to fabricate the concrete connection structure 100 mentioned above, such as... Figure 9 As shown, the construction method may include:

[0086] Step S100: Make a mold for the support, position and install multiple node longitudinal bars, and place one end of the multiple node longitudinal bars inside the mold of the support. Pour concrete into the mold of the support to form a support that anchors the multiple node longitudinal bars.

[0087] In step S100, fabricating the support mold refers to constructing a mold with an internal shape resembling the support shape by connecting and supporting multiple templates. If the support includes longitudinal reinforcement and stirrups, multiple longitudinal reinforcements and stirrups need to be installed in advance at predetermined positions to connect and form the support's skeleton structure, and the support mold is then constructed on the outside of the skeleton structure. Positioning and installing multiple node longitudinal reinforcements means inserting one end of each node longitudinal reinforcement into the support mold for a predetermined length to meet the length requirements for anchorage connection and to support the multiple node longitudinal reinforcements to prevent misalignment. For example, the lower end of each node longitudinal reinforcement can be fixed to the support longitudinal reinforcement or the support stirrups.

[0088] Step S200: Make a mold for the connection node. Multiple longitudinal reinforcement bars pass through the mold of the connection node. Pour concrete into the mold of the connection node to form the connection node.

[0089] Step S300: Make a support mold for the beam, and place the other end of the longitudinal reinforcement of multiple nodes inside the support mold of the beam, and pour concrete into the support mold of the beam to form a beam that anchors the longitudinal reinforcement of multiple nodes.

[0090] The fabrication of molds for connecting nodes and beams can follow the same process as that for bearing molds. Simply pre-install the corresponding frame support structure before fabricating the molds for each structure. Then, by pouring concrete and waiting for it to harden to the preset strength, the formwork surrounding the molds can be removed, thus completing the fabrication of the concrete connection structure.

[0091] It should be noted that in the above three steps, the support and the connecting node can be cast together, the connecting node can be cast together with the beam, or the support, the connecting node and the beam can be cast together. It is only necessary to complete the corresponding mold making before casting.

[0092] Thus, the above construction method allows for direct casting to form a concrete connection structure, making construction very convenient. Furthermore, since the construction method for the concrete connection structure provided in this application is used to fabricate the concrete connection structure described above, it can produce the same technical effect and solve the same technical problem, which will not be elaborated upon here.

[0093] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0094] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection described in the claims.

Claims

1. A concrete connecting structure, characterized by, The application relates to a support, a beam and a connecting joint. The support comprises a concrete support. The beam comprises a concrete beam, which is spaced apart from the concrete support along a first linear direction parallel to a vertical direction. The connecting joint comprises a concrete connecting piece and a plurality of joint longitudinal reinforcements. One end of each of the joint longitudinal reinforcements is anchored to the concrete support, and the other end of each of the joint longitudinal reinforcements is anchored to the concrete beam.

2. The concrete joint structure according to claim 1, characterized by The concrete connecting piece is filled between the concrete support and the concrete beam along the first linear direction and connects the concrete support and the concrete beam.

3. The concrete joint structure according to claim 2, characterized by The joint longitudinal reinforcements between the concrete support and the concrete beam are located in the concrete connecting piece. The linear rigidity of the connecting joint is less than the linear rigidity of the beam.

4. The concrete joint structure according to claim 1, characterized by The linear rigidity of the beam is a, the linear rigidity of the connecting joint is b, and 5<=a / b<=20.

5. The concrete joint structure according to claim 1, characterized by Along the first linear direction, the linear rigidity of the connecting joint is proportional to the cross-sectional moment of inertia of the connecting joint, and the linear rigidity of the connecting joint is inversely proportional to the length of the connecting joint. The beam extends along a second linear direction, and the linear rigidity of the beam is proportional to the cross-sectional moment of inertia of the beam, and the linear rigidity of the beam is inversely proportional to the length of the beam.

6. The concrete joint structure according to any one of claims 1 to 5, characterized by The connecting joint further comprises a plurality of joint stirrups. The length direction of the joint longitudinal reinforcements is parallel to the first linear direction.

7. The concrete joint structure according to claim 6, characterized by Along the first linear direction, at least part of the joint longitudinal reinforcements inserted into the beam are bent towards the connecting joint. Along the first linear direction, at least part of the joint longitudinal reinforcements inserted into the support are bent towards the connecting joint. The first linear direction is parallel to the vertical direction. Along the vertical direction, the lower side of the end of the beam close to the support is connected to the upper side of the concrete connecting piece, and the lower side of the concrete connecting piece is connected to the upper side of the support. The support comprises a first support and a support top section connected in sequence along the vertical direction, and the support top section is located above the first support. Along the vertical direction, the upper end of the connecting joint is connected to the beam, the lower end of the connecting joint is connected to the upper side right area of the first support, and the vertical projection area of the support top section on the first support is spaced apart from the vertical projection area of the beam on the first support. The support comprises a first support and a second support, and the second support is connected to one side of the first support along a fourth linear direction, and the fourth linear direction is perpendicular to the vertical direction. Along the vertical direction, the upper end of the connecting joint is connected to the beam, the lower end of the connecting joint is connected to the second support, and the beam has a gap between the first support along the fourth linear direction.

8. The concrete joint structure according to any one of claims 1 to 5, characterized by The beam further comprises a plurality of beam longitudinal reinforcements, and the support further comprises a plurality of support longitudinal reinforcements; The length direction of the plurality of beam longitudinal reinforcements is parallel to a second straight line direction, the plurality of beam longitudinal reinforcements are spaced apart around a central axis parallel to the second straight line direction, and the plurality of beam longitudinal reinforcements are arranged in the concrete beam, the second straight line direction being the length direction of the beam; The length direction of the plurality of support longitudinal reinforcements is parallel to a third straight line direction, the plurality of support longitudinal reinforcements are spaced apart around a central axis parallel to the third straight line direction, and the plurality of support longitudinal reinforcements are arranged in the concrete support, the third straight line direction being the length direction of the support.

9. The concrete joint structure according to claim 8, characterized by The beam further comprises a plurality of beam stirrups, the plurality of beam stirrups are spaced apart along the second straight line direction, and each beam stirrup is connected to the plurality of beam longitudinal reinforcements; and the plurality of beam stirrups are arranged in the concrete beam.

10. The concrete joint structure according to claim 8, characterized by The support further comprises a plurality of support stirrups, the plurality of support stirrups are spaced apart along the third straight line direction, and each support stirrup is connected to the plurality of support longitudinal reinforcements; and the plurality of support stirrups are arranged in the concrete beam.

11. A method of constructing a concrete joint structure, characterized by The construction method for manufacturing the concrete connecting structure according to any one of claims 1-10, the construction method comprising: manufacturing a mold for the support, positioning and installing the plurality of node longitudinal reinforcements with one end of the plurality of node longitudinal reinforcements in the mold for the support, and pouring concrete into the mold for the support to form the support anchoring the plurality of node longitudinal reinforcements; manufacturing a mold for the connecting node, the plurality of node longitudinal reinforcements passing through the mold for the connecting node, and pouring concrete into the mold for the connecting node to form the connecting node; manufacturing a support mold for the beam, positioning and installing the other end of the plurality of node longitudinal reinforcements in the support mold for the beam, and pouring concrete into the support mold for the beam to form the beam anchoring the plurality of node longitudinal reinforcements.

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