Steel-concrete interface bolt connecting device capable of locally shearing and sliding and mounting method thereof
By designing a bolt connection device that can be partially shear-slided and slipped in the steel-concrete interface, using inclined screws and gaskets to treat shear stress, the shear deformation problem of the connection between the steel frame house module and the concrete core cylinder is solved, and the long-term construction is improved Usage performance and construction efficiency have expanded high-level applications.
Patent Information
- Application Number
- CN202411537653.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2024-12-17
AI Technical Summary
The connection between the steel frame house module and the concrete core shear wall is prone to unignorable longitudinal shear deformation at the high-rise, resulting in bolts shear damage, limiting the high-rise application of steel-concrete modular buildings.
Design a steel-concrete interface bolt connection device that can be partially shear-slipped. By setting inclined elliptical pin holes and bolt holes on the steel-concrete connection steel plate, and using inclined screws and gradient anchoring gaskets, the concrete core cylinder can be shrinked. Variable releases shear stress to achieve stable connection of steel-mixed interface.
It effectively improves the long-term use performance of steel-concrete modular buildings, avoids the concentration of bolt shear stress, improves the stability of connections and construction tolerance errors, and expands the application scenarios of high-rise buildings.
Smart Images
Figure CN119145531A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of modular integrated building construction, and more specifically to a steel-concrete interface bolt connection device capable of local shear sliding and an installation method thereof. Background Art
[0002] With the increasing demand for urban renewal, the labor cost of the construction market has been rising year by year. The delivery speed of modular construction in hotels, apartments, dormitories and other spaces has been accelerated, and modular integrated construction (MiC) technology has received continuous attention. MiC is a new construction method that combines low-carbon and intelligent technology. It uses factory-prefabricated modular units and transports building modules to the construction site for assembly. Its core concept is to transfer most of the repetitive processes of modular construction to factories far away from the construction site, thereby effectively improving construction efficiency, quality and controllability.
[0003] At present, most of the MiC buildings that have been built are assembled by combining concrete core tube shear walls with concrete house modules. Although replacing concrete house modules with steel frame house modules can effectively reduce the weight of the building and increase the efficiency of construction splicing, the horizontal connection structure between the steel frame house module and the concrete core tube shear wall requires high splicing accuracy, which is prone to splicing delays or even splicing failures during construction.
[0004] On the other hand, due to its complex gas-liquid-solid microstructure and its physical and chemical mechanism, concrete is prone to shrinkage creep during long-term use and load bearing, causing the concrete core tube shear wall to shrink and deform toward the center of the ground; while steel is dense and has higher toughness, and steel frame house modules will hardly have long-term shrinkage creep behavior. So far, MiC buildings using steel frame house modules and concrete core tube shear walls will produce non-negligible longitudinal shear deformation at the steel-concrete connection interface at high-rise locations, and the steel-concrete horizontal connection will be subjected to concentrated force, which is very likely to cause bolt shear failure, resulting in the long-term performance degradation of steel-concrete MiC buildings. Therefore, steel-concrete MiC buildings are currently more common in low-rise modular buildings with a low number of floors. Steel-concrete MiC buildings using steel frame house modules and concrete core tube shear walls are prone to high-rise steel-concrete connection bolt shear failure during long-term use. Summary of the invention
[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 and an installation method thereof, 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, and has a higher 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 present invention 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 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.
[0008] According to the above scheme, the inclined gasket includes a semi-thin gasket and a semi-thick gasket, and the semi-thin gasket and the semi-thick gasket are fixed on the steel-concrete connecting 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 present invention also provides an installation method of a steel-concrete interface bolt connection device capable of local shear sliding, comprising the following steps:
[0013] S1. Clean the installation position, preset the installation thread on the concrete embedded steel plate, align the hole position, pass the bolt rod through the steel-concrete connection steel plate, and reach the deepest part of the hole position through the thread on the concrete embedded steel plate. 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, the two halves of the gasket are glued to the steel-concrete connection steel plate through a thin layer of adhesive, wherein the half-thick gasket is on the top and the half-thin gasket is 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 steel-concrete interface bolt connection device capable of local shear sliding of the present invention has the following beneficial effects:
[0017] 1. The steel-concrete interface bolt connection structure capable of partial shearing and sliding of the present invention is reasonably designed. By setting an upwardly inclined screw with a concrete anchor end higher than the steel plate nut end, the downward shear deformation relative to the steel plate end is cleverly utilized when the concrete core tube shrinks, and the axial tightening force of the anchor bolt is partially released, so as to achieve the sliding and rotation of the overall structure of the anchor bolt connection, and the overall deformation of the anchor bolt connection structure is used to offset the concentrated shear stress caused by the vertical shear deformation. While protecting the strength and reliability of the steel-concrete interface anchor bolt connection, the shear stress concentration of the steel-concrete interface is avoided, and the long-term use performance of the steel-concrete MiC building is effectively improved, and the core connection technology foundation for the steel-concrete MiC building to move towards high-rise modular integrated building applications is laid;
[0018] 2. The deepening and deformation pin hole and gradient anchor gasket designed as a matching design of the present invention also have the effect of improving the allowable error in the construction of the steel-concrete connection structure. The steel-concrete bolt connection structure is easy for construction workers to learn and master, and is conducive to popularization and use. The relevant gradient anchor gasket models and the design methods of the deepening and deformation pin hole sizes 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 It is a structural schematic diagram of a steel-concrete interface bolt connection device capable of local shear sliding according to the present invention;
[0021] Figure 2 It is a side view of the steel-concrete interface bolt connection device capable of local shear sliding of the present invention;
[0022] Figure 3 It is a schematic diagram of the steel-concrete connection steel plate and the inclined gasket structure of the present invention;
[0023] In the figure: 1. Steel module frame, 2. Concrete shear wall, 3. Steel-concrete connecting 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, specific embodiments 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 sliding 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, 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 arranged on the steel-concrete connection steel plate 3, an oblique bolt hole inclined upward is arranged on the concrete embedded steel plate 4, and 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 rod 7 passes through the steel-concrete connection steel plate 3 and the concrete embedded steel plate 4 in sequence, and the steel module frame 1 is fixed on the concrete shear wall 2 through the nut 6, and the end of the nut 6 is provided with an inclined gasket 5. The inclined gasket 5 includes a semi-thin gasket 10 and a semi-thick gasket 11, and the semi-thin gasket 10 and the semi-thick gasket 11 are fixed on the steel-concrete connection steel plate 3 through a thin layer of adhesive plate 9. The inclination angle of the bolt hole is 5 to 15°. There are two elliptical pin holes 8 and they are arranged longitudinally, and there are two bolt holes and they are arranged longitudinally. The steel module frame 1 only shows three steel arms at the installation end point. The thickness of the semi-thin gasket 10 is 1-5mm, and the thickness of the semi-thick gasket 11 is 5-10mm.
[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 is 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 holes is set between 5 and 15°, 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 rod 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 a semi-thin gasket 10 and a semi-thick gasket 11 according to different thicknesses. Both the semi-thin gasket 10 and the semi-thick gasket 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 shears downward relative to the steel module frame 1 due to the shrinkage creep phenomenon of the concrete material, the elliptical pin hole 8 on the steel-concrete connection steel plate 3 can allow a small amount of shear deformation to develop. Subsequently, due to the installation tilt angle set by the tilt screw 7, the tilt screw 7 will rotate in the vertical plane around the nut 6 during the shear deformation. At the same time, the anchoring distance decreases as the tilt angle tends to the horizontal, thereby releasing part of the original anchor bolt preload. The semi-thick gasket 11 in the tilt gasket 5 is installed on the upper side of the tilt screw 7. When the vertical plane rotation occurs, the semi-thick gasket 11 is more likely to disperse the local concentrated stress caused by the deflection behavior in the tilt screw 7 and the nut 6.
[0031] Conventional bolts are generally installed vertically on the anchoring components. When the anchoring components are displaced from each other, the shearing behavior will inevitably lead to an increase in the bolt anchoring distance, which will then induce an increase in the anchor stress caused by shearing, greatly increasing the anchor positive stress, and by friction with the bolt shearing behavior, the shear deformation is inhibited from continuing. The anchor connection proposed by the present invention is not a vertical anchoring. Its core feature lies in the inclined anchor rods and gaskets. Through the inclined screw rods and the upper thick and lower thin gaskets, the steel-concrete interface bolt connection can provide a deformation space for directional shearing of the steel-concrete interface through its own vertical sliding and vertical plane rotation, thereby resolving the concentrated stress that may cause the anchor connection to be damaged.
[0032] The present invention also provides an installation method of a steel-concrete interface bolt connection device capable of local shear sliding, comprising the following steps:
[0033] S1. Clean the installation position, preset the installation thread on the concrete embedded steel plate, align the hole position, pass the bolt rod through the steel-concrete connection steel plate, and reach the deepest part of the hole position through the thread on the concrete embedded steel plate. When installing the inclined screw rod, the installation gap is left below the elliptical pin hole on the steel-concrete connection steel plate;
[0034] S2, the inclined gasket includes a half-thin gasket and a half-thick gasket, the two halves of the gasket are glued to the steel-concrete connection steel plate through a thin layer of adhesive, wherein the half-thick gasket is on the top and the half-thin gasket is on the bottom;
[0035] 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.
[0036] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.
Claims
1. A steel-concrete interface bolt connection device capable of local shear slip, It is 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, 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 elliptical pin hole inclined upward, the concrete embedded steel plate is provided with a bolt hole inclined upward, and the steel-concrete connecting steel plate is fixedly arranged 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, It is 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 on the concrete shear wall through a nut, and an inclined gasket is arranged at the end of the nut.
3. The steel-concrete interface bolt connection device capable of local shear slip according to claim 2, It is 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 connecting steel plate through a thin layer of adhesive plate.
4. The steel-concrete interface bolt connection device capable of local shear sliding according to claim 3, It is 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, It is 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, It is characterized in that There are two elliptical pin holes arranged longitudinally, and there are two bolt holes arranged longitudinally.
7. A method for installing the steel-concrete interface bolt connection device capable of local shear slip according to claim 1, It is characterized in that The following steps are involved: S1. Clean the installation position, preset the installation thread on the concrete embedded steel plate, align the hole position, pass the bolt rod through the steel-concrete connection steel plate, and reach the deepest part of the hole position through the thread on the concrete embedded steel plate. When installing the inclined screw rod, the installation gap is left below the elliptical pin hole on the steel-concrete connection steel plate; S2, the inclined gasket includes a half-thin gasket and a half-thick gasket, the two halves of the gasket are glued to the steel-concrete connection steel plate through a thin layer of adhesive, wherein the half-thick gasket is on the top and the half-thin gasket is on the bottom; 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.