Intelligent detection method for steel-concrete beams and their nodes

Abstract

The present invention belongs to the field of building structures, and specifically relates to a steel-concrete beam and an intelligent detection method for its nodes. The steel-concrete beam includes: a steel U-shaped body, with edge blocks and slot parts formed at both ends of the inner top surface; a steel bottom plate, fixed to the lower end of the steel U-shaped body, with partition parts including inner and outer partitions and middle partitions formed at both ends, and the through holes on each partition are through-through, and the upper end of the partition matches the slot part; a connector, including an insert block and a plate part 2, the plate part 2 contains a plurality of partition bodies, and the insert block is formed with multi-stage through holes and connected to the steel U-shaped body; a tie rod part, matching the multi-stage through holes, fixing the connector to the steel U-shaped body; a sleeve part, sleeved on the tie rod part, one end contacts the cap body, the other end contacts the insert block, and is provided with a detection unit for detecting the pressure condition of its end; a foaming body, filled in a steel box composed of a steel U-shaped body, etc.; and a concrete layer. The present invention has both the characteristics of prefabricated construction and lightweight characteristics, and can realize intelligent detection.

Description

Technical Field

[0001] The invention relates to the technical field of building components, and in particular to a steel-concrete beam and an intelligent detection method for nodes thereof. Background Art

[0002] As the main component of a building that is horizontally set and used to bear weight, the crossbeam is mainly divided into steel beams and reinforced concrete beams according to the difference in forming process. Comparing steel beams and reinforced concrete beams, the construction speed of steel beams is much faster than that of reinforced concrete beams, and the seismic performance is also better than that of reinforced concrete beams, but the stiffness and bending resistance of steel beams are worse than those of reinforced concrete beams.

[0003] Based on the above-mentioned comparison of advantages and disadvantages, the prior art has innovatively created steel-concrete frame beam technology, such as the steel-concrete beam / steel-concrete frame beam disclosed in the patent document with publication number CN207892030U and the name of the steel-concrete frame beam hanging formwork casting construction structure, which includes prefabricated steel, steel mesh, formwork, and suspension connectors. The formwork includes a beam side formwork and a beam bottom formwork. The prefabricated steel is an I-shaped steel, which is fixed to the construction site by support columns on both sides. The steel mesh is welded and fixed to the periphery of the prefabricated steel, and the screw connection seats on both sides are connected to one end of the tension screw, and the tension screw is sleeved with a limiting sleeve. The other end of the tension screw passes through the beam side formwork and is locked and fixed to the main ribs on the outer side of the beam side formwork by a nut. An upper fixed bracket is arranged above the support block at the top of the prefabricated steel, so that the upper fixed bracket is fixedly suspended and connected to the corresponding lower fixed bracket through a suspension connector. The bottom formwork of the beam is supported above the lower fixed bracket, and the bottom formwork of the beam is combined with the two side formworks of the beam to form a casting cavity, and concrete is poured into the casting cavity to complete the construction of the steel concrete frame beam. This technology adopts on-site construction and molding. Compared with traditional reinforced concrete beams, the formed structure has many excellent properties such as earthquake resistance, compression resistance, bending resistance, fire resistance, and moisture resistance. However, there are also the following main shortcomings: (1) Most of the volume of the beam body is occupied by C45 concrete, resulting in a large self-weight of the beam body, which is generally at least twice the self-weight of the steel structure beam; (2) During construction, on-site casting is required to establish a connection with the supporting column, which will involve too many high-altitude operation steps such as scaffolding erection and casting formwork erection. The process is cumbersome and the construction efficiency is low. Summary of the invention

[0004] In view of the shortcomings of existing steel-concrete beams, the present invention provides a steel-concrete beam and an intelligent detection method for its nodes to solve the problem that the existing steel-concrete beams have a large dead weight and cannot be quickly installed through prefabricated construction. That is, the steel-concrete beam provided by the present invention has both the characteristics of prefabricated construction and lightweight characteristics, as well as damping seismic resistance and detection functions, which helps to achieve the purpose of remote monitoring and early warning of the connection status of the connection nodes between the steel-concrete beam and the supporting column.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a steel-concrete beam, comprising:

[0006] A steel U-shaped body, wherein two webs are arranged front and back oppositely; on the inner top surface of the steel U-shaped body, edge blocks extending downward are formed at both ends, and slots are formed corresponding to the inner ends of the two edge blocks; the slots on both sides contain a plurality of grooves, and the grooves extend in the front-back direction;

[0007] The steel bottom plate is fixedly mounted at the lower end of the steel U-shaped body and can be connected with the steel U-shaped body to form a steel box body; a partition part extending upward is formed on the top surface of the steel bottom plate and on the inner sides of both ends; the partition part includes an inner partition, an outer partition and at least one middle partition; the through hole formed on each partition of the partition part can pass through from left to right; the upper end of each partition of the partition part can be inserted into the groove corresponding to the upper part thereof;

[0008] Two connectors, each connector includes an insert block and a plate portion 2 formed on the inner end surface of the insert block; the plate portion 2 contains a plurality of partition bodies distributed alternately in the front and rear directions, and each partition body is extended in the left-right direction; the insert block is formed with at least one multi-stage through hole penetrating in the left-right direction; the insert block is inserted into the port of the steel U-shaped body, and can establish a profile contact matching relationship with the port of the steel U-shaped body; after the steel U-shaped body and the steel bottom plate are fixedly connected to form a steel box body, the top surface of the insert block contacts the bottom surface of the edge block, and the bottom surface of the insert block contacts the top surface of the end of the steel bottom plate, forming a structure that can support the steel-concrete beam; therefore, the insert block needs to have a longer extension length in the left-right direction; a plurality of strip holes extending in the left-right direction are distributed on each partition body of the plate portion 2;

[0009] Multiple tie rod parts, each tie rod part contains a tie rod that matches the multi-step through hole one by one, and an elastic pad arranged on the tie rod and close to the cap body, and a nut group arranged at the end of the rod body of the tie rod; a threaded section is formed at the free end of the rod body of the tie rod, and the nut group matches the threaded section; the tie rod passes through the through holes on each partition on the partition part and the multi-step through hole on the insert block from the inside to the outside, so that the threaded section extends to the outer end of the multi-step through hole, and then matches with the nut group, so that the connecting body can be fixed at the end of the steel U-shaped body, that is, the connecting body is fixed at the port of the steel box body mentioned above, so that the two connecting bodies can form support for the two ends of the steel box body;

[0010] A plurality of sleeve parts are matched with the pull rods one by one, and are sleeved on a section of the pull rod passing through the partition part, and one end of the sleeve part is in contact with the end surface of the cap body, and the other end is in contact with the inner end surface of the insert block; a detection unit for detecting the compressed movement status of the two ends of the sleeve part is provided on the sleeve part;

[0011] A foam body is filled in a steel box body composed of a steel U-shaped body, a steel bottom plate and a connecting body; the foam body can be selected from foam materials commonly used in the construction field, such as polystyrene foam body;

[0012] and a concrete layer, which is connected with the steel U-shaped body and the steel bottom plate by means of a steel bar skeleton fixedly arranged on the periphery of the steel box body and forms a whole.

[0013] Optionally, the sleeve portion includes an outer tube and an inner tube. An axial recessed groove is formed at one end of the outer tube for the inner tube to be inserted into. One end of the inner tube can always remain outside the axial recessed groove and contact the end surface of the cap body. The elastic pad is sleeved on a section of the inner tube extending outside the outer tube. The other end of the outer tube contacts the inner end surface of the insert block.

[0014] A plurality of elastic arch strips are formed at the middle of the wall of the section of the inner tube extending into the axial groove, so that the arch surfaces of the elastic arch strips are all facing the inner peripheral surface of the axial groove and a radial distance is maintained between the apex of the arch surface and the inner peripheral surface of the axial groove. When the end of the inner tube is squeezed by the cap body, the elastic arch strip can be elastically deformed.

[0015] The detection unit includes a detector body fixed on the outer tube, and a physical quantity change part fixed on the elastic arch strip. The detector body is connected to the physical quantity change part. The physical quantity change part can generate a physical quantity change signal following the elastic deformation of the elastic arch strip, and after feeding back to the detector body, the detector body generates a sensing signal.

[0016] After the elastic pad is sleeved on the outer circumferential surface of one end of the inner tube exposed outside the outer tube, the end surfaces of the elastic pad are respectively in contact with the end surface of the inner partition and the end surface of the cap body, and can be squeezed during the synchronous displacement of the pull rod and the inserted block, resulting in elastic deformation, thereby forming an elastic space for the inner tube to undergo axial displacement relative to the outer tube.

[0017] Optionally, the plate body portion on the steel bottom plate and between the partition parts on both sides is formed as an arched plate body, and the lower end surface of the arched plate body is formed as an inner arched surface, so that the arched plate body is formed into an upwardly arched plate.

[0018] Optionally, an annular flange is formed on the inner end surface of the inner partition and on the periphery of the through hole, and a cap is arranged on the annular flange. The cap can seal the cap body, elastic pad, etc. of the pull rod inside.

[0019] Optionally, V-shaped grooves are formed on the inner end surface of the inner partition and on the upper and lower sides of the through hole. The V-shaped grooves extend in the front-to-back direction. At least the cross section of the channel corresponding to the upper side of the inner partition is in the shape of a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid is relatively close to the outside and the short side is inward; correspondingly, the upper end of the inner partition is formed with an inclined surface and can form a profile contact matching relationship with the channel.

[0020] Optionally, arcuate grooves are formed on the inner end surface of the middle partition plate and on the inner end surface of the outer partition plate, respectively, and through holes are formed at the bottoms of the arcuate grooves.

[0021] Optionally, the pull rod of the pull rod part is formed with a light column segment 1 and a light column segment 2, and the light column segment 1 is connected with the cap body, and the light column segment 2 is connected with the threaded segment. The outer diameter of the light column segment 1 is greater than the outer diameter of the light column segment 2.

[0022] The multi-step through hole comprises an inner end countersunk hole, an outer end countersunk hole and a middle connecting section arranged between the two countersunk holes.

[0023] The side near the cap body on the light column segment 1 is matched with the partition part and is provided with the sleeve part. The end of the light column segment 1 away from the cap body is matched with the inner end countersunk hole, so that the bottom surface of the inner end countersunk hole contacts the end surface of the light column segment 1. The light column segment 2 passes through the middle connecting section, so that the threaded section extends into the outer end countersunk hole and matches with the nut group, so that the end surface of the nut group contacts the inner bottom surface of the outer end countersunk hole.

[0024] When the sleeve part includes an outer tube and an inner tube, the light column section can pass through the axial cavity of the inner tube and the axial cavity of the outer tube. The outer tube passes through the through holes of each partition body on the partition part. The end of the inner tube exposed outside the outer tube contacts the end surface of the cap body. The end of the outer tube away from the cap body contacts the end surface of the insert block.

[0025] Optionally, elastic embedding layers are provided on the upper end surface of the steel bottom plate and at both end sides. The lower end surface of the insert block is in compression contact with the elastic embedding layer. When the elastic embedding layer undergoes elastic deformation, its elastic deformation in the vertical direction can increase the static friction resistance between the insert block and the insert block, and its elastic deformation in the left and right directions can cause the insert block to move in a circuitous manner in the left and right directions, thereby helping to improve the damping and anti-seismic capability and improve safety.

[0026] Optionally, the detector body is a strain sensor, and the physical quantity changing part is a strain gauge part on the strain sensor, so that the strain gauge part can generate a strain signal along with the elastic deformation of the elastic arch bar, so that the strain sensor generates a sensing signal.

[0027] The present invention also relates to an intelligent detection method for steel-concrete beam nodes based on the steel-concrete beam with the above-mentioned structure. When the plate part 2 on the connecting body is pulled by external force, it can cause the embedded block and the tie rod part to synchronously generate a displacement along the left and right directions relative to the steel U-shaped body, and can cause the cap body on the tie rod part to apply axial pressure on the end of the sleeve part, prompting the detection unit to generate a sensor signal.

[0028] Along with the displacement change of the pull rod part, the cap body can apply axial pressure to the end of the inner tube, causing the elastic arch strip to undergo elastic deformation, thereby causing the physical quantity change part / strain gauge part to undergo physical quantity change, and feeding back the physical quantity change signal to the detector body to generate a real-time sensing signal.

[0029] After processing the sensor signal, the controller converts it into a vibration signal, and compares the real-time vibration signal with the warning threshold. According to the comparison result, the connection status of the connection node established between the steel-concrete beam and the supporting column is judged, such as at least the firmness and stability, whether a large deformation occurs, whether a fracture occurs, etc., so as to carry out safety monitoring and early warning, and achieve the purpose of intelligent detection and supervision.

[0030] With the displacement change of the pull rod part, the elastic pad can synchronously undergo elastic deformation. The elastic pad is sleeved on the outer peripheral surface of one end side of the inner tube exposed outside the outer tube, and the end surfaces of both ends of the elastic pad are respectively in contact with the end surface of the inner partition and the end surface of the cap body, and can be squeezed in the process of synchronous displacement of the pull rod and the insert block, resulting in elastic deformation, causing the inner tube to undergo axial displacement relative to the outer tube, thereby causing the elastic arch strip to undergo elastic deformation.

[0031] Beneficial effects: The present invention overcomes the shortcomings of existing steel-concrete beams (also known as steel box concrete frame beams), that is, the steel-concrete beams of the present invention are filled with polystyrene foam, which occupies more than 1 / 3 of the cross section, so that the self-weight of the steel-concrete beam is significantly reduced, and the specific gravity is reduced by at least about 1 / 4, achieving the goal of lightweight; the two side webs of the steel U-shaped body can replace the thick web of the I-beam. Compared with the existing steel-concrete beams, the overall steel consumption of the two is basically the same, but the double web structure can enhance the bending strength of the beam compared with the single web of the I-beam, which is conducive to achieving the steel The connection nodes between the ends of the concrete beams and the supporting columns are constructed using prefabricated parts, which can reduce welding work during construction and eliminate complicated casting operations, facilitate rapid prefabricated construction on site, improve installation efficiency, and help ensure that the connection nodes established between the steel-concrete beams and the supporting columns have good stiffness and strength while also providing damping seismic resistance. It also helps to detect the status of the connection nodes, achieve remote real-time supervision, and provide safety warning support for the status of the connection nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at point I in the middle.

[0034] Figure 3It is a schematic diagram of the local structure when the connector cooperates with the steel box composed of a steel U-shaped body and a steel bottom plate.

[0035] Figure 4 It is a schematic diagram of the cross-sectional structure of a steel box consisting of a steel U-shaped body and a steel bottom plate (equipped with a tie rod portion).

[0036] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at II in the middle.

[0037] Figure 6 It is a schematic diagram of the main structure of the matching connecting body and the pull rod part.

[0038] Figure 7 For along Figure 6 Schematic diagram of the half-section structure viewed from above in the AA direction.

[0039] Figure 8 A schematic diagram of the side structure of the connector.

[0040] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure at BB in the middle.

[0041] Fig.10 Schematic diagram of the cross-sectional structure of the outer tube.

[0042] Fig.11 It is a schematic diagram of the cross-sectional structure of the inner tube.

[0043] Fig.12 It is a comparison diagram of the cross-sectional structural status of the casing part.

[0044] In the figure: 100 supporting column, 101 embedded part, 102 plate part 1, 103 strip hole 1, 104 U-shaped cover; 200 steel-concrete beam; 10 steel U-shaped body, 11 inner top surface, 111 edge block, 112 slot part, 1121 channel 1, 1122 channel 2; 20 steel bottom plate, 21 partition part, 211 inner partition, 2111 V-shaped groove, 2112 annular flange, 2113 cover cap, 212 middle partition, 213 outer partition, 22 inner arch surface; 30 connector, 31 insert block, 32 plate part 2, 321 first partition, 322 second partition, 323 third partition, 33 multi-step through hole, 331 inner end countersunk hole, 332 middle connecting section, 333 outer end countersunk hole; 40 pull rod part, 41 cap body, 42 light column section 1, 43 light column section 2, 44 threaded section, 45 elastic pad, 46 nut group; 50 sleeve part, 51 outer tube, 511 axial countersunk groove, 52 inner tube, 521 elastic arch strip, 522 pressure surface, 523 end side outer peripheral surface, 53 detection unit; 60 foam body; 70 concrete layer; 80 stud group; 90 elastic embedded layer. DETAILED DESCRIPTION

[0045] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0046] like Figures 1 to 12 A steel-concrete beam 200 is shown, comprising a steel U-shaped body 10 , a steel bottom plate 20 , a pair of connectors 30 , a plurality of tie rod portions 40 , a plurality of sleeve portions 50 , a foam body 60 , a concrete layer 70 and an elastic embedding layer 90 .

[0047] The supporting column 100 corresponding to the steel-concrete beam 200 is provided with an embedded part 101, and a plate part 102 is formed on the embedded part 101, and a strip hole 103 is formed on each plate body of the plate part 102, and a U-shaped cover 104 is also configured corresponding to the part of the embedded part 101 exposed outside the supporting column 100. The specific connection between the embedded part 101 and the end of the steel-concrete beam 200 will be described later. In order to achieve the purpose of fixedly connecting the embedded part 101 and the butt end of the steel-concrete beam 200, a plurality of stud groups 80 are configured accordingly.

[0048] The two webs on the steel U-shaped body 10 are arranged front and back relative to each other. On the inner top surface 11 of the steel U-shaped body 10, edge blocks 111 extending downward are formed at both ends, and slots 112 are formed at the inner ends of the two edge blocks 111. The slots 112 include a first slot 1121 and a second slot 1122. The number of the first slot 1121 is one or more; the number of the second slot 1122 is also one or more.

[0049] The steel bottom plate 20 is fixedly installed at the lower end of the steel U-shaped body 10, and can form a steel box / steel box body with the steel U-shaped body 10. On the top surface of the steel bottom plate 20 and on the inner side of both ends, a partition part 21 extending upward is formed. The partition part 21 includes an inner partition 211, an outer partition 213 and at least one middle partition 212, and multiple middle partitions 212 are alternately distributed between the inner partition 211 and the outer partition 213. The through hole formed on each partition of the partition part 21 is through in the left-right direction. The upper end of each partition of the partition part 21 can be inserted into different grooves of the corresponding slot part 112, so that the upper end of the partition is either inserted into the groove one 1121 or inserted into the groove two 1122, and the upper ends of the partitions of the partition part 21 establish a fixed connection relationship with the steel U-shaped body 10, which can enhance the overall strength of the steel box formed by the steel U-shaped body 10 and the steel bottom plate 20, as well as the strength and toughness to resist shear force along the left and right directions, and improve the lateral flexibility.

[0050] In order to improve the mechanical indicators of the steel-concrete beam 200 or the steel box, such as the stiffness, bearing capacity, and ability to resist vertical shear, a section of the plate on the steel bottom plate 20 and between the partitions 21 on both sides is formed into an arch plate, and the lower end surface / outer end surface of the arch plate is formed into an inner arch surface 22, that is, the arch plate is in an upwardly arched state. With the help of the arch plate part of the steel bottom plate 20, the overall mechanical properties of the steel box can be improved, the force distribution of the steel-concrete beam 200 when bearing load can be optimized, and the steel-concrete beam 200 can have better supporting capacity and its bearing strength can be improved. The steel U-shaped body 10 and the steel bottom plate 20 are generally fixedly connected as a whole by welding. The two can also be connected as a whole by welding and bolting at the same time.

[0051] Two connectors 30 are provided at both ends of the steel box, that is, correspondingly at the left and right ends of the steel U-shaped body 10. Each connector 30 includes an insert block 31 and a second plate portion 32 formed on the inner end surface of the insert block 31 and extending in the left-right direction. The second plate portion 32 includes a plurality of partition bodies distributed alternately in front and back, including the first partition 321, the second partition 322, and the third partition 323 shown in the figure. On the partition body of the plate part 2 32, that is, on the first partition 321, the second partition 322, and the third partition 323, a plurality of strip holes extending in the left-right direction are distributed, and the strip holes are matched with the strip holes 103 provided on the plate part 1 102, and the plate part 1 102 and the plate part 2 32 can be fixedly connected by the stud group 80, that is, the end of the steel-concrete beam 200 is fixedly connected with the embedded part 101 on the support column 100, so that the embedded part 101 can support the two ends of the steel-concrete beam 200 and be fixedly mounted between the two support columns 100. After the plate part 102 on the embedded part 101 is fixedly connected with the plate part 2 32 on the steel-concrete beam 200, a U-shaped cover 104 is fixedly provided on the embedded part 101. The U-shaped cover 104 can seal the plate part 1 102 and the plate part 2 32 fixed together inside. A sealing strip / sealing pad is provided between the relative profiles between the U-shaped cover 104 and the embedded part 101.

[0052] Two multi-step through holes 33 are formed on the insert block 31 and extend in the left-right direction. After the insert block 31 is inserted into the port of the steel U-shaped body 10, that is, into the port of the steel box, it can establish a profile contact matching relationship with the steel U-shaped body 10 or the steel box. The top surface of the insert block 31 contacts the bottom surface of the edge block 111, and the bottom surface of the insert block 31 contacts the top surface of the end of the steel bottom plate 20 to form an end support structure with sufficient strength. The edge block 111 is provided to make the thickness at the port of the steel box significantly greater than that in the middle part, so as to ensure the support strength at the support connection position at both ends of the steel box, thereby ensuring the reliability and stability of the connection nodes at both ends of the steel-concrete beam 200.

[0053] The tie rods 40 are matched with the multi-step through holes 33 in a one-to-one correspondence. The insert block 31 is generally provided with at least one pair of tie rods 40. Figure 7 , Figure 8As shown, the two tie rod parts 40 arranged on the same insert block 31 can be arranged alternately front and back. Each tie rod part 40 includes a tie rod corresponding to the multi-step through hole 33, an elastic pad 45 arranged on the tie rod and close to the cap body 41 of the tie rod, and a nut group 46 arranged on the threaded section 44 at the end of the rod body of the tie rod. The nut group 46 can be understood to contain a plurality of nuts or a nut and a gasket (preferably an elastic gasket). The tie rod passes through the through holes on each partition in the partition part 21 and the multi-step through hole 33 on the insert block 31 from the inside to the outside, so that the threaded section 44 extends to the outer end of the multi-step through hole 33, and then matches with the nut group 46, and the connecting body 30 is fixed to the end of the steel U-shaped body 10 or the steel box.

[0054] The sleeve portion 50 matches the pull rod one-to-one, and is sleeved on a section of the pull rod that passes through the partition portion 21, so that one end of the sleeve portion 50 contacts the end surface of the cap body 41, and the other end contacts the inner end surface of the insert block 31. Therefore, after the sleeve portion 50 is sleeved on the pull rod, the elastic pad 45 provided on the pull rod is sleeved on the outer circumferential surface of the sleeve portion 50. When the pull rod is subjected to a pulling action in the left and right directions, the cap body 41 at its end can move left and right. The elastic pad 45 can create a certain elastic space for the left and right movement of the cap body 41, and will not affect the stability and reliability of the pull rod portion 40 connecting the steel bottom plate 20 or the steel box. The sleeve portion 50 is provided with a detection unit 53 for detecting the compressed motion state / activity state of its end (the end in contact with the end surface of the cap body 41 is the active end / mechanical action generating end, and the end in contact with the end surface of the insert block 31 is the passive end / stationary end).

[0055] The foam body 60 is filled in the steel box composed of the steel U-shaped body 10, the steel bottom plate 20 and the connecting body 30, and after being formed, it can occupy / fill the entire internal space of the steel box, so that the steel box is formed into a solid structure.

[0056] The concrete layer 70 is connected to the steel U-shaped body 10 and the steel bottom plate 20 to form a whole by fixing the steel frame fixedly arranged on the periphery of the steel box. The steel frame / steel mesh sleeve fixedly arranged on the periphery of the steel box or the steel U-shaped body 10 and the steel bottom plate 20 is fixedly connected with the steel U-shaped body 10 and / or the steel bottom plate 20, and can be realized by welding connection and / or plug-in connection. In this patent, the specific structural form of the steel frame and how to realize the fixed connection between it and the steel box are not described in detail because those skilled in the art can refer to the existing technology to realize it.

[0057] An annular flange 2112 is formed on the inner end surface of the inner partition 211 and on the periphery of the through hole, and a cap 2113 is arranged on the annular flange 2112. The cap 2113 can seal the cap body 41 of the pull rod inside. The cap 2113 seals the cap body 41, the elastic pad 45, etc. inside to prevent the cap body 41 and the elastic pad 45 from contacting the foam body 60, thereby improving the sensitivity and reliability of the detection unit 53, creating an independent space for the movement of the cap body 41, eliminating / suppressing the interference that the foam body 60 may cause to the cap body 41 and the elastic pad 45, and enabling the detection unit 53 to detect the activity state / movement state of the end of the sleeve part 50 more sensitively and reliably.

[0058] V-shaped grooves 2111 are formed on the inner end surface of the inner partition 211 and corresponding to the upper and lower sides of the through hole. The V-shaped grooves 2111 extend in the front-to-back direction. After the V-shaped grooves 2111 are provided, two weak areas can be formed above and below the through hole of the inner partition 211, so that the inner partition 211 can be elastically deformed at the V-shaped grooves 2111, and even under the action of excessive external force, the inner partition 211 can be bent and deformed at the weak area / the V-shaped grooves 2111, but will not break easily, thereby increasing the lateral flexibility at the connection node, improving the safety of the steel-concrete beam 200, that is, improving the safety of the connection node established between the steel-concrete beam 200 and the supporting column 100, helping to effectively prevent the collapse of the building when encountering disasters such as strong earthquakes, or reducing the magnitude of the collapse, helping to provide better life safety protection.

[0059] In order to match the V-shaped groove 2111, at least the cross section of the groove (i.e., groove 2 1122) corresponding to the upper side of the inner partition 211 is in the shape of a right-angled trapezoid, with the hypotenuse of the right-angled trapezoid relatively close to the outside and the short side facing inward; at the same time, the upper end of the inner partition 211 is formed with an inclined surface, and can form a profile contact matching relationship with the groove, see Figures 2 to 5 As shown. Figure 2 In the illustrated embodiment, the corresponding grooves above the inner partition 211 and the middle partition 212 are formed as the second groove 1122, and the corresponding groove above the outer partition 213 is formed as the first groove 1121. The cross section of the first groove 1121 is rectangular. It should be noted that if a plurality of middle partitions 212 are distributed between the inner partition 211 and the outer partition 213, the corresponding grooves above the middle partition 212 close to the inner partition 211 can be formed as the second groove 1122.

[0060] When there is one middle partition 212, the left-right spacing between the middle partition 212 and the inner partition 211 is smaller than the spacing between the middle partition 212 and the outer partition 213, and the former is 1 / 2 to 1 / 5 of the latter. If there are multiple middle partitions 212, the left-right spacing (indicated by a) between the innermost middle partition 212 and the inner partition 211 is smaller than the left-right spacing (indicated by b) between two adjacent middle partitions 212, and at the same time, the left-right spacing between two adjacent middle partitions 212 is smaller than the spacing (indicated by c) between the outermost middle partition 212 and the outer partition 213. Specifically, a can be 1 / 4 to 1 / 2 of b, b can be 1 / 2 to 2 / 3 of c, and the value of a does not exceed 10 cm, preferably within 5 cm.

[0061] The V-shaped groove 2111 is provided on the inner partition 211, and the upper end of the inner partition 211 is matched with the second groove 1122. On the one hand, when the steel-concrete beam 200 encounters slight vibrations, such as weak earthquake disasters and strong winds, the inner partition 211 itself undergoes elastic deformation, the inserted block 31 rubs against the steel box port, and the plate part 2 32 and the plate part 1 102 undergo sliding friction to absorb the shock energy and play a role in buffering the impact; on the other hand, when encountering a strong earthquake, the upper end of the inner partition 211 and part of the upper end of the middle partition 212 slip out of the corresponding second groove 1122 to disperse and delay the sudden strong impact on the connection node between the steel-concrete beam 200 and the support column 100, prolong the deformation time, and better prevent the connection node from breaking. Therefore, the present invention can effectively prevent the occurrence of fracture at the connection node between the steel-concrete beam 200 and the support column 100, can prevent the collapse of the building, and improve the support safety of the steel-concrete beam 200. In addition, when the inner partition 211 undergoes elastic deformation, irreversible bending deformation, etc., the sensor signal fed back by the detection unit 53 is different, so it is helpful to help judge the connection status between the steel-concrete beam 200 and the support column 100, such as the degree of deformation at the node connection position, whether fracture or collapse occurs, etc., provide early warning support, provide effective and accurate information for rescue, and formulate an effective and feasible rescue plan.

[0062] The provision of a plurality of middle partitions 212 is beneficial to the connection firmness between the connector 30 and the steel box / steel bottom plate 20, improves the lateral flexibility and the ability to resist the fracture of the steel-concrete beam 200 and the support column 100 at the connection node, and can improve the safety of the steel-concrete beam 200. The thicknesses of the inner partition 211, the outer partition 213 and the middle partition 212 are different or partially the same.

[0063] In order to further improve the elastic buffering performance of the steel-concrete beam 200 and enhance its safety, arc grooves are formed on the inner end surface of the middle partition 212 and the inner end surface of the outer partition 213, and the through holes provided on the partitions are formed at the bottom of the arc grooves. Figure 2 .

[0064] like Figure 3 , Figures 5 to 9 As shown, the plate portion 2 32 includes a first partition 321, two second partitions 322, and at least two pairs of third partitions 323. The first partition 321 is relatively located at the center of the front-to-back direction, the two second partitions 322 are located at the front and rear positions respectively, and the third partition 323 is distributed between the second partition 322 and the first partition 321 at the front side, and between the second partition 322 and the first partition 321 at the rear side. The first partition 321 and the second partition 322 are both continuously extended along the vertical direction to the end face height of the insert block 31. The third partitions 323 are arranged in pairs in an alternating manner up and down, avoiding the middle area of ​​the end face of the insert block 31, and providing a space for setting the multi-step through holes 33 and assembling the pull rod portion 40 in the middle area. The steel bottom plate 20 is fixed to the lower part of the steel U-shaped body 10 , generally after the assembly of the connecting body 30 and the tie rod part 40 is completed.

[0065] The plate part 102 includes a plurality of partition bodies arranged alternately along the front-to-back direction. When the plate part 102 and the plate part 2 32 are connected, each partition body on the plate part 2 32, namely the first partition 321, the second partition 322, and the third partition 323, is extended between two adjacent partition bodies on the plate part 102, or the partition body on the plate part 102 is sandwiched between the second partition 322 and the third partition 323. Each partition body on the plate part 102 and each partition body on the plate part 2 32 are plug-connected in the left-right direction, and after plugging, a matching relationship of face-to-face contact can be formed between the opposite surfaces of the partition bodies (see Figure 1 ). After the stud group 80 matches with the strip hole 103 and the strip hole, the static friction resistance between the partition bodies can be increased, and a travel space is provided for the partition body on the second plate part 32 to move left and right relative to the partition body on the first plate part 102, forming a friction damping structure, so that the connection node formed between the steel-concrete beam 200 and the support column 100 has a friction damping anti-seismic function.

[0066] Elastic embedded layers 90 are provided on the upper end surface and at both ends of the steel bottom plate 20. The lower end surface of the insert block 31 contacts the elastic embedded layer 90, which can increase the static friction resistance between the connector 30 and the steel box, and can also improve the bonding force between the opposite surfaces, so that the insert block 31 can have flexible elastic detour ability during the deformation of the elastic embedded layer 90 in the left and right directions, which can improve the damping and anti-seismic effect.

[0067] Between the insert block 31 and the end of the steel base plate 20, such as the position where the insert block 31 and the steel base plate 20 are provided with the elastic embedding layer 90, and the position where the insert block 31 is relative to the edge block 111, a fixed connection can be established by means of studs, and the axial direction of the studs is made to be in the vertical direction. At the same time, long holes extending in the left and right directions are provided on the top wall of the steel U-shaped body 10 and on the steel base plate 20 corresponding to the positions where the studs are arranged, so that the studs are connected to the insert block 31 after passing through the long holes, so as to fix the insert block 31 to the top wall of the steel U-shaped body 10 and the end of the steel base plate 20.

[0068] The corresponding configuration of the above-mentioned studs and the long holes is similar to the configuration between the aforementioned stud group 80 and the strip hole 103 and the strip hole, both of which are for the purpose of providing space for the studs to move relative to the long holes in the left and right directions and for the stud group 80 to move relative to the strip hole 103 and the strip holes in the left and right directions.

[0069] The pull rod body of the pull rod portion 40 is formed with a light column segment 1 42 and a light column segment 2 43 from the cap body 41 to the threaded segment 44, and the outer diameter of the cap body 41 is larger than the outer diameter of the light column segment 1 42, the outer diameter of the light column segment 1 42 is larger than the outer diameter of the light column segment 2 43, and the outer diameter of the light column segment 2 43 is not smaller than the outer diameter of the threaded segment 44. The light column segment 1 42 corresponds to and matches the partition portion 21 and the sleeve portion 50, that is, the light column segment 1 42 passes through the axial cavity of the sleeve portion 50 (specifically, the axial cavity of the inner tube 52 and the axial cavity of the outer tube 51), and the sleeve portion 50 passes through a plurality of through holes provided on the partition body of the partition portion 21. The end of the light column segment 1 42 that is away from the cap body 41 extends to one end of the multi-step through hole 33 (that is, extends into the inner end counterbore 331) to prevent the pull rod from moving outward relative to the insert block 31. The second light column section 43 passes through the middle connecting section 332. After the threaded section 44 extends into the other end of the multi-step through hole 33 (i.e., extends into the outer end counterbore 333), it matches with the nut set 46. The outer end counterbore 333 is filled with colloid to seal the nut set 46 and the threaded section 44 inside, which plays a role in preventing rust and loosening.

[0070] like Figures 10 to 12As shown, the sleeve 50 includes an outer tube 51 and an inner tube 52. An axial recessed groove 511 is formed at one end of the outer tube 51 for the inner tube 52 to extend into. The axial extension length of the axial recessed groove 511 is smaller than the axial extension length of the inner tube 52, so that one end of the inner tube 52 can always remain outside the axial recessed groove 511, and the end surface of the inner tube 52 that remains outside the axial recessed groove 511 (i.e., the pressure-bearing surface 522 in the figure) contacts the end surface of the cap body 41. The other end of the outer tube 51 contacts the inner end surface of the insert block 31. One end of the inner tube 52 contacts the bottom surface of the axial groove 511, and the other end extends out of the axial groove 511. The outer diameter of a section of the outer circumference of the end side (i.e., the outer diameter of the end side outer circumference 523 in the figure) is consistent with the inner diameter of the axial groove 511, so that one end of the end side outer circumference 523 of the inner tube 52 can reciprocate along the axial direction relative to the outer tube 51. The outer diameter of the body of the inner tube 52 is smaller than the inner diameter of the axial groove 511. The inner diameter of the inner tube 52 can be consistent with the inner diameter of the outer tube 51, or the inner diameter of the inner tube 52 can be smaller than the inner diameter of the outer tube 51. The inner tube 52 can slide relative to the pull rod.

[0071] Two elastic arch strips 521 are formed at the middle of a section of the inner tube 52 extending into the axial recessed groove 511, so that the arch surfaces of the elastic arch strips 521 are all facing the inner peripheral surface of the axial recessed groove 511 and a radial spacing is maintained between the apex of the arch surface and the inner peripheral surface of the axial recessed groove 511. When the end of the inner tube 52 is squeezed by the cap body 41, the elastic arch strip 521 can be elastically deformed. It can be understood that the inner tube 52 is divided into two sections of the tube body and the two sections of the tube body are connected to form a whole by at least two elastic arch strips 521, and the multiple elastic arch strips 521 are distributed alternately around the circumference.

[0072] The detection unit 53 includes a detector body fixed on the outer tube 51, and a physical quantity change part (such as a strain gauge part) fixed on the elastic arch strip 521. The detector body is connected to the physical quantity change part. The physical quantity change part can generate a physical quantity change signal following the elastic deformation of the elastic arch strip 521, and feed it back to the detector body, so as to detect the movement / activity state of the end of the inner tube 52, that is, to monitor the connection state between the steel-concrete beam 200 and the support column 100, which is helpful to achieve the purpose of remote intelligent monitoring of the installation state of the steel-concrete beam 200.

[0073] The detector body may adopt a strain sensor, and the strain gauge part of the strain sensor may be fixedly mounted on the elastic arch strip 521, so that it can synchronously generate strain changes when the elastic arch strip 521 undergoes elastic deformation, thereby enabling the strain sensor to generate a sensing signal.

[0074] After the sensor signal fed back by the detection unit 53 in real time is transmitted to the controller, the controller can analyze and process the sensor signal, convert it into a vibration signal including parameters such as frequency and amplitude, and after comparing and analyzing it with the set early warning, determine the real-time connection status of the connection node of the steel-concrete beam 200 (that is, the connection node between the steel-concrete beam 200 and the supporting column 100), and give an instruction on whether to issue an early warning.

[0075] like Figure 4 , Figure 5 As shown, the elastic pad 45 is sleeved on the outer peripheral surface of one end side of the inner tube 52 exposed outside the outer tube 51, and the end faces of both ends of the elastic pad 45 are respectively in contact with the end faces of the inner partition 211 and the end faces of the cap body 41, so that the elastic pad 45 can be squeezed and elastically deformed during the synchronous displacement of the pull rod and the insert block 31, providing elastic activity space for the axial displacement of the inner tube 52 relative to the outer tube 51, and can be accompanied by the elastic deformation of the elastic arch strip 521, and a sensor signal is generated accordingly. It is preferred that the elastic pad 45 has an annular flange body formed on one end facing the cap body 41, so that the elastic pad 45 also has a sealing function.

[0076] Relying on the above-mentioned steel-concrete beam 200 structure, when the plate part 2 32 on the connecting body 30 is pulled by external force, the inserted block 31 and the tie rod part 40 can be synchronously displaced relative to the steel U-shaped body 10 in the left and right directions, and the cap body 41 on the tie rod part 40 can apply axial pressure on the end of the sleeve part 50, prompting the detection unit 53 to generate a sensing signal. After processing the sensing signal, the controller can convert it into a vibration signal, such as a frequency signal and / or an amplitude signal, and after comparing it with the preset frequency warning threshold and amplitude warning threshold, it can determine the real-time status of the connection node established between the steel-concrete beam 200 and the support column 100, and determine whether a fracture or obvious deformation occurs at the connection node.

[0077] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A steel-concrete beam (200), characterized in that: include: A steel U-shaped body (10) has two webs arranged front and back opposite to each other; downwardly extending edge blocks (111) are formed on the inner top surface (11) and at both ends, and slot portions (112) are formed on the inner end sides of the two edge blocks (111); the slot portions (112) each contain a plurality of grooves; A steel bottom plate (20) is fixed to the lower end of the steel U-shaped body (10); upwardly extending partition plates (21) are formed on the top surface and on the inner sides of both ends; the partition plates (21) include an inner partition plate (211), an outer partition plate (213) and at least one middle partition plate (212); a through hole formed on each partition plate of the partition plate portion (21) can pass through from left to right, and the upper end of each partition plate can be correspondingly inserted into different grooves on the slot portion (112); A pair of connecting bodies (30), each comprising an insert block (31) and a second plate portion (32) formed at the inner end of the insert block (31); the second plate portion (32) comprises a plurality of partition bodies arranged alternately in front and rear directions; the insert block (31) is formed with at least one multi-step through hole (33) extending in the left-right direction; the insert block (31) is inserted into a port of the steel U-shaped body (10); A plurality of tie rod portions (40) comprising tie rods corresponding to the multi-step through holes (33) one by one, elastic pads (45) disposed on each tie rod and close to the cap body (41) of the tie rod, and a nut group (46) disposed on the end of the tie rod body; the tie rods pass through the through holes on each partition of the partition portion (21) and the multi-step through holes (33) on the insert block (31) from the inside to the outside, so that the end of the tie rod body extends into the outer end of the multi-step through hole (33) and matches with the nut group (46), so that the connecting body (30) can be fixed to the end of the steel U-shaped body (10); A plurality of sleeve portions (50) are matched with the pull rods one by one and are sleeved on a section of the pull rod passing through the partition portion (21), and one end of the sleeve portion (50) is in contact with the end surface of the cap body (41), and the other end is in contact with the inner end surface of the insert block (31); a detection unit (53) is provided on the sleeve portion (50) for detecting the pressure condition of the end portion thereof; A foamed body (60) is filled and can be formed in a steel box composed of a steel U-shaped body (10), a steel bottom plate (20) and a connecting body (30); and a concrete layer (70) which is connected as a whole with the steel U-shaped body (10) and the steel bottom plate (20) by means of a steel reinforcement frame fixedly arranged on the periphery of the steel box.

2. The steel-concrete beam (200) according to claim 1, characterized in that: The sleeve portion (50) comprises an outer tube (51) and an inner tube (52); an axial recessed groove (511) for the inner tube (52) to extend into is formed at one end of the outer tube (51); one end of the inner tube (52) can always remain outside the axial recessed groove (511) and can contact the end surface of the cap body (41); the other end of the outer tube (51) contacts the inner end surface of the insert block (31); a plurality of elastic arch strips (521) are formed at the middle of a section of the inner tube (52) extending into the axial recessed groove (511), so that the arch surface of the elastic arch strip (521) faces the inner peripheral surface of the axial recessed groove (511) and a radial spacing is maintained between the vertex of the arch surface and the inner peripheral surface of the axial recessed groove (511); when the end of the inner tube (52) is squeezed by the cap body (41), the elastic arch strip (521) can be elastically deformed; The detection unit (53) comprises a detector body fixed on the outer tube (51), and a physical quantity changing portion fixed on the elastic arch strip (521); the detector body is connected to the physical quantity changing portion; the physical quantity changing portion can change the physical quantity following the elastic deformation of the elastic arch strip (521), so that the detector body generates a sensing signal.

3. The steel-concrete beam (200) according to claim 1, characterized in that: The plate body portion on the steel bottom plate (20) and between the partition plate portions (21) on both sides is formed into an arched plate body that arches upward.

4. The steel-concrete beam (200) according to claim 1, characterized in that: An annular flange (2112) is formed on the inner end surface of the inner partition plate (211) and on the periphery of the through hole provided thereon, and a cover cap (2113) is arranged on the annular flange (2112); the cover cap (2113) can seal the cap body (41) of the pull rod inside.

5. The steel-concrete beam (200) according to claim 1, characterized in that: V-shaped grooves (2111) are formed on the inner end surface of the inner partition (211) and on the upper and lower sides of the through hole thereon, respectively, and the V-shaped grooves (2111) extend in the front-rear direction; at least the cross section of the groove corresponding to the upper part of the inner partition (211) is in the shape of a right-angled trapezoid, and the hypotenuse of the right-angled trapezoid is relatively close to the outside and the short side is facing inward; correspondingly, the upper end of the inner partition (211) is formed with an inclined surface and can form a profile contact matching relationship with the groove.

6. The steel-concrete beam (200) according to claim 5, characterized in that: Arc surface grooves are respectively formed on the inner end surface of the middle partition plate (212) and the inner end surface of the outer partition plate (213), and through holes are formed at the bottoms of the arc surface grooves.

7. The steel-concrete beam (200) according to claim 1, characterized in that: A light column segment 1 (42) and a light column segment 2 (43) are formed on the pull rod of the pull rod portion (40); the light column segment 1 (42) is connected to the cap body (41), and the light column segment 2 (43) is close to the threaded segment (44) matching the nut assembly (46); the outer diameter of the light column segment 1 (42) is greater than the outer diameter of the light column segment 2 (43); The multi-step through hole (33) comprises an inner end countersunk hole (331), an outer end countersunk hole (333), and an intermediate connecting section (332) disposed between the two countersunk holes; The side of the light column segment 1 (42) near the cap body (41) matches the partition portion (21) and is provided with a sleeve portion (50); the end of the light column segment 1 (42) away from the cap body (41) matches the inner end countersunk hole (331); the light column segment 2 (43) passes through the middle connecting section (332), and the threaded section (44) extends into the outer end countersunk hole (333) to match the nut assembly (46).

8. The steel-concrete beam (200) according to claim 1, characterized in that: An elastic embedding layer (90) is provided on the upper end surface of the steel bottom plate (20) and at both end sides; the lower end surface of the embedding block (31) is in contact with the elastic embedding layer (90).

9. The steel-concrete beam (200) according to claim 1, characterized in that: The detector body is a strain sensor, and the physical quantity changing part is a strain gauge part on the strain sensor, so that the strain gauge part can generate a strain signal accompanying the elastic deformation process of the elastic arch strip (521).

10. A steel-concrete beam node intelligent detection method based on the steel-concrete beam (200) according to any one of claims 1 to 9, characterized in that: When the second plate portion (32) on the connecting body (30) is pulled by an external force, the inserted block (31) and the pull rod portion (40) can be synchronously displaced in the left-right direction relative to the steel U-shaped body (10), and the cap body (41) on the pull rod portion (40) can apply axial pressure to the end of the sleeve portion (50), prompting the detection unit (53) to generate a sensing signal.

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