Steel-concrete interface bolt connecting device capable of locally shearing and sliding
By designing a steel-concrete interface bolt connection device that can undergo local shear slip, the problems of shear deformation and bolt damage in steel-concrete connections in high-rise buildings are solved, and stable connections and long-term performance improvements of high-rise modular buildings are achieved. It is suitable for modular integrated buildings and other engineering fields.
Patent Information
- Application Number
- CN202422657164.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The connection between steel-frame house modules and concrete core tube shear walls in high-rise buildings is prone to longitudinal shear deformation and bolt shear failure, resulting in the deterioration of the long-term performance of steel-concrete MiC buildings and making them difficult to use in high-rise buildings.
A steel-concrete interface bolt connection device with local shear slip is designed. Through the combination of inclined screws and washers, it allows vertical shear displacement caused by shrinkage and creep of concrete shear walls, releases local shear stress, and provides a stable horizontal connection.
It can effectively release the shear stress at the steel-concrete interface and improve the long-term performance of steel-concrete MiC buildings. It is suitable for high-rise modular buildings and is easy to construct. It is suitable for engineering fields such as modular integrated buildings, steel-concrete composite bridges and ballastless track laying.
Smart Images
Figure CN223423407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of modular integrated building construction, and more particularly to a steel-concrete interface bolt connection device capable of local shearing and sliding. Background Art
[0002] With the increasing demand for urban renewal and the increasing labor costs in the construction market, the delivery of modular buildings for spaces such as hotels, apartments, and dormitories has accelerated, leading to continued interest in Modular Integrated Construction (MiC). MiC is a new construction method that integrates low-carbon and intelligent technologies. It utilizes factory-prefabricated modular units that are then transported to the construction site for assembly. Its core concept is to shift most of the repetitive processes involved in modular construction to a factory located far from the construction site, effectively improving construction efficiency, quality, and controllability.
[0003] Currently, the vast majority of completed MiC buildings utilize a combination of concrete core shear walls and concrete housing modules. While replacing concrete housing modules with steel-framed modules can effectively reduce building weight and increase construction efficiency, the horizontal connections between the steel-framed modules and the concrete core shear walls require high precision, making them prone to delays and even failures during construction.
[0004] On the other hand, due to its complex gas-liquid-solid microstructure and its physicochemical mechanisms, concrete is prone to shrinkage and creep over long-term use and under load, causing the concrete core shear walls to shrink and deform toward the center of the ground. Steel, on the other hand, is denser and more ductile, so steel-framed housing modules exhibit virtually no long-term shrinkage and creep. Consequently, MiC buildings utilizing steel-framed housing modules and concrete core shear walls will experience significant longitudinal shear deformation at the steel-concrete interface at higher levels. This concentrated stress on the horizontal steel-concrete connections makes bolt shear failure highly likely, degrading the long-term performance of steel-concrete MiC buildings. Consequently, steel-concrete MiC buildings are currently more commonly found in low-rise modular buildings with fewer floors. Steel-concrete MiC buildings utilizing steel-framed housing modules and concrete core shear walls are prone to shear failure of high-rise steel-concrete connection bolts over long-term use. Utility Model Content
[0005] The technical problem to be solved by the present invention is to provide a steel-concrete interface bolt connection device capable of local shear slip, which can allow a certain amount of vertical shear displacement to release local shear stress after long-term shrinkage and creep of the core tube concrete, and at the same time can stably provide horizontal connection of the steel-concrete interface, with high installation tolerance and installation efficiency, laying a key node connection technology for steel-concrete MiC buildings to move towards more application scenarios.
[0006] The technical solution adopted by the utility model to solve its technical problems is: constructing a steel-concrete interface bolt connection device that can be partially sheared and slipped, including a steel module frame, a concrete shear wall, a steel-concrete connection steel plate and a concrete embedded steel plate, the steel-concrete connection steel plate is fixedly arranged on the lower side of the steel module frame, the concrete embedded steel plate is embedded in the concrete shear wall, the outer surface of the concrete embedded steel plate is flush with the surface of the concrete shear wall, the steel-concrete connection steel plate is provided with an elliptical pin hole inclined upward, the concrete embedded steel plate is provided with a bolt hole inclined upward, and the steel-concrete connection steel plate is fixedly arranged on the concrete embedded steel plate by an inclined screw.
[0007] According to the above scheme, the inclined screw passes through the steel-concrete connecting steel plate and the concrete embedded steel plate in sequence, and fixes the steel module frame to the concrete shear wall through a nut, and an inclined gasket is provided at the end of the nut.
[0008] According to the above solution, the inclined gasket includes a semi-thin gasket and a semi-thick gasket, and the semi-thin gasket and the semi-thick gasket are both fixed on the steel-concrete connection steel plate through a thin layer of adhesive plate.
[0009] According to the above solution, the thickness of the semi-thin gasket is 1-5 mm, and the thickness of the semi-thick gasket is 5-10 mm.
[0010] According to the above solution, the inclination angle of the bolt hole is 5 to 15 degrees.
[0011] According to the above solution, there are two elliptical pin holes arranged longitudinally, and there are two bolt holes arranged longitudinally.
[0012] The utility model also provides a method for installing a steel-concrete interface bolt connection device capable of local shearing and sliding, comprising the following steps:
[0013] S1. Clean the installation location, pre-set the installation threads on the concrete embedded steel plate, align the holes, and insert the bolt rod through the steel-concrete connection steel plate and through the threads on the concrete embedded steel plate to the deepest part of the hole. When installing the inclined screw rod, the installation gap is left below the elliptical pin hole on the steel-concrete connection steel plate;
[0014] S2, the inclined gasket includes a half-thin gasket and a half-thick gasket, both halves of the gasket are glued to the steel-concrete joint steel plate by a thin layer of adhesive, with the half-thick gasket on the top and the half-thin gasket on the bottom;
[0015] S3. Install through the nut, tighten the nut, check and confirm whether there is any abnormality in the connection and the tightness of the bolt.
[0016] The implementation of the steel-concrete interface bolt connection device capable of local shear slippage of the present invention has the following beneficial effects:
[0017] 1. The steel-concrete interface bolt connection structure capable of local shear slippage is rationally designed. By setting an upwardly inclined screw with the concrete anchor end higher than the steel plate nut end, this utility model cleverly utilizes the downward shear deformation of the concrete core tube relative to the steel plate end when shrinking, partially releasing the axial tightening force of the anchor bolt, achieving the overall structural slippage and rotation of the anchor bolt connection. The overall deformation of the anchor bolt connection structure offsets the concentrated shear stress caused by vertical shear deformation. While protecting the strength and reliability of the steel-concrete interface anchor bolt connection, it avoids the concentration of shear stress at the steel-concrete interface, effectively improving the long-term performance of steel-concrete MiC buildings and laying the core connection technology foundation for the application of steel-concrete MiC buildings in high-rise modular integrated buildings.
[0018] 2. The deepening and deforming pin holes and gradient anchoring gaskets designed as a supporting part of the present invention also have the effect of improving the allowable error in the construction of steel-concrete connection structures. The steel-concrete bolt connection structure is easy for construction workers to learn and master, and is conducive to promotion and use. The relevant gradient anchoring gasket models and the design methods of the deepening and deforming pin holes are easy to understand, and can effectively assist and promote practical engineering applications. It not only involves the field of modular integrated building construction technology, but can also be expanded to other engineering fields such as steel-concrete composite bridges and ballastless track laying, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:
[0020] Figure 1 This is a schematic structural diagram of the utility model's steel-concrete interface bolt connection device capable of local shear slip;
[0021] Figure 2 This is a side view of the steel-concrete interface bolt connection device capable of local shear slippage according to the utility model;
[0022] Figure 3 This is a schematic diagram of the steel-concrete connection steel plate and inclined gasket structure of the utility model;
[0023] In the figure: 1. Steel module frame, 2. Concrete shear wall, 3. Steel-concrete connection steel plate, 4. Concrete embedded steel plate; 5. Inclined gasket, 6. Nut, 7. Inclined screw, 8. Elliptical pin hole, 9. Thin layer adhesive plate, 10. Semi-thin gasket, 11. Semi-thick gasket. DETAILED DESCRIPTION
[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.
[0025] like Figure 1-3 As shown, the steel-concrete interface bolt connection device capable of local shear slip of the present invention comprises a steel module frame 1, a concrete shear wall 2, a steel-concrete connection steel plate 3 and a concrete embedded steel plate 4. The steel-concrete connection steel plate 3 is fixedly arranged on the lower side of the steel module frame 1, the concrete embedded steel plate 4 is embedded in the concrete shear wall 2, and the outer surface of the concrete embedded steel plate 4 is flush with the surface of the concrete shear wall 2. An elliptical pin hole 8 inclined upward is provided on the steel-concrete connection steel plate 3, and a bolt hole inclined upward is provided on the concrete embedded steel plate 4. The steel-concrete connection steel plate 3 is fixedly arranged on the concrete embedded steel plate 4 by an inclined screw 7.
[0026] The inclined screw rods 7 pass through the steel-concrete connection plate 3 and the concrete-embedded steel plate 4 in sequence, securing the steel module frame 1 to the concrete shear wall 2 via nuts 6. The ends of the nuts 6 are provided with inclined washers 5. The inclined washers 5 include a semi-thin washer 10 and a semi-thick washer 11, both of which are secured to the steel-concrete connection plate 3 via a thin adhesive sheet 9. The inclination angle of the bolt holes is 5 to 15 degrees. There are two elliptical pin holes 8 arranged longitudinally, and two bolt holes arranged longitudinally. The steel module frame 1 only displays the three steel arms at the mounting endpoints. The thickness of the semi-thin washer 10 is 1-5 mm, and the thickness of the semi-thick washer 11 is 5-10 mm.
[0027] In a preferred embodiment of the present invention, the steel module frame 1 only shows three steel arms at the installation end points, the steel-concrete connecting steel plate 3 is welded to the steel module frame 1, and the steel-concrete connecting steel plate 3 and the steel module frame 1 are flatly attached to the concrete shear wall 2; the concrete embedded steel plate 4 is embedded in the concrete shear wall 2 and firmly connected, extending from the concrete embedded steel plate 4 to the inside of the concrete shear wall 2, and has two upwardly inclined bolt holes, and the inclination angle of the bolt hole is set between 5 and 15 degrees, wherein the concrete embedded steel plate 4 is preset with an installation thread; the inclined screw 7 is passed through the inclined gasket 5, the steel-concrete connecting steel plate 3, and the concrete embedded steel plate 4 in sequence, and finally installed through the nut 6, and the steel module frame 1 is firmly bolted to the concrete shear wall 2.
[0028] In a preferred embodiment of the present invention, the bolt holes of the steel-concrete connecting steel plate 3 are set as elliptical pin holes 8 which are longer up and down. When installing the inclined screw 7, the installation gap should be left below the elliptical pin hole 8 as much as possible; to ensure the function, the inclined gasket 5 is divided into semi-thin gaskets 10 and semi-thick gaskets 11 according to different thicknesses. Both the semi-thin gaskets 10 and the semi-thick gaskets 11 are pre-pasted on the steel-concrete connecting steel plate 3 through a thin layer of adhesive plate 9.
[0029] Here’s how it works:
[0030] When the concrete shear wall 2 is sheared downward relative to the steel module frame 1 due to shrinkage and creep of the concrete material, the elliptical pin hole 8 on the steel-concrete connecting steel plate 3 can allow a small amount of shear deformation to occur, and then, due to the installation inclination angle of the inclined screw rod 7, the inclined screw rod 7 will rotate in the vertical plane around the nut 6 in the shear deformation, and at the same time, the anchoring distance is reduced due to the inclination angle tending to be horizontal, thereby releasing part of the original anchor bolt pre-tightening force. The half-thick washer 11 in the inclined washer 5 is installed on the upper side of the inclined screw rod 7, and when the vertical plane rotation occurs, the half-thick washer 11 is more likely to disperse the local concentrated stress caused by the deflection behavior in the inclined screw rod 7 and the nut 6.
[0031] The conventional bolt is generally installed vertically on the anchoring member, and when the anchoring members move relative to each other, the shear behavior inevitably leads to an increase in the anchoring distance of the bolt, and then induces an increase in the shear-induced anchor bolt stress, greatly increases the normal stress of the anchor bolt, and through the friction of the bolt shear behavior, the continuation of the shear deformation is reversely inhibited. The anchor bolt connection provided by the utility model is not vertically anchored, and the core feature lies in the inclined anchor rod and the washer, and through the inclined screw rod and the washer with thick upper and thin lower, the steel-concrete interface bolt connection can provide a deformation space for the directional shear of the steel-concrete interface through the vertical sliding and the vertical plane rotation of the steel-concrete interface bolt connection, and resolves the concentrated stress that may cause damage to the anchor bolt connection.
[0032] The utility model also provides a kind of installation method of steel-concrete interface bolt connection device that can be locally sheared and slid, comprising the following steps:
[0033] S1, cleaning installation position, presetting installation screw thread on concrete-embedded steel plate, aligning hole position, bolt rod is passed through steel-concrete connecting steel plate, and reaches the deepest place of hole position by screw thread on concrete-embedded steel plate upper surface, when installing inclined screw rod, installation gap is left below elliptical pin hole on steel-concrete connecting steel plate;
[0034] S2, inclined washer includes half-thin washer and half-thick washer, the two half washers are pasted on steel-concrete connecting steel plate by thin layer adhesive tape, wherein half-thick washer is on top, and half-thin washer is on bottom;
[0035] S3, installation is carried out by nut, fastening nut, carries out inspection and confirmation, checks whether there is abnormality in connection, the fastening degree of bolt.
[0036] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than limiting, and those skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, and these all belong to the protection of the utility model.
Claims
1. A steel-concrete interface bolt connection device capable of local shear slip, characterized in that: It includes a steel module frame, a concrete shear wall, a steel-concrete connecting steel plate and a concrete embedded steel plate. The steel-concrete connecting steel plate is fixedly arranged on the lower side of the steel module frame, the concrete embedded steel plate is embedded in the concrete shear wall, and the outer surface of the concrete embedded steel plate is flush with the surface of the concrete shear wall. The steel-concrete connecting steel plate is provided with an upward inclined elliptical pin hole, the concrete embedded steel plate is provided with an upward inclined bolt hole, and the steel-concrete connecting steel plate is fixed on the concrete embedded steel plate by an inclined screw.
2. The steel-concrete interface bolt connection device capable of local shear slip according to claim 1, characterized in that: The inclined screw rod passes through the steel-concrete connecting steel plate and the concrete embedded steel plate in sequence, and fixes the steel module frame to the concrete shear wall through a nut, and an inclined gasket is provided at the end of the nut.
3. The steel-concrete interface bolt connection device capable of local shear slip according to claim 2, characterized in that: The inclined gasket includes a semi-thin gasket and a semi-thick gasket, and the semi-thin gasket and the semi-thick gasket are both fixed on the steel-concrete connection steel plate through a thin layer of adhesive plate.
4. The steel-concrete interface bolt connection device capable of local shear slip according to claim 3, characterized in that: The thickness of the semi-thin gasket is 1-5 mm, and the thickness of the semi-thick gasket is 5-10 mm.
5. The steel-concrete interface bolt connection device capable of local shear slip according to claim 1, characterized in that: The inclination angle of the bolt hole is 5 to 15 degrees.
6. The steel-concrete interface bolt connection device capable of local shear slip according to claim 1, characterized in that: There are two elliptical pin holes arranged longitudinally, and there are two bolt holes arranged longitudinally.