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CN-121992714-A - Eccentric-steel-structure-free spherical hinge support with tensile and compressive resistance

CN121992714ACN 121992714 ACN121992714 ACN 121992714ACN-121992714-A

Abstract

The invention relates to a non-eccentric steel structure spherical hinge support with tensile and compressive resistance, which comprises a perforated support plate, a spherical crown support plate, a long screw rod and a ball nut, wherein the perforated support plate is a lower support plate, a spherical groove is formed in the upper surface of the perforated support plate, an internal threaded hole is formed in the center of the spherical groove, the spherical crown support plate is an upper support plate, a convex spherical crown is arranged on the lower surface of the spherical crown support plate, a spherical groove is formed in the center of the upper surface of a square plate of the spherical crown support plate, a wedge-shaped cavity penetrating in the vertical direction is formed in the center of the convex spherical crown, a lower side screw rod is arranged at the lower end of the long screw rod, the lower side screw rod is in threaded connection with the internal threaded hole of the perforated support plate, the ball nut comprises a spherical end, a hexagonal cylinder end and a transition cylinder section, the center of the ball nut is provided with an internal threaded hole, the ball nut is in threaded connection with the upper side screw rod of the long screw rod through the internal threaded hole, and the spherical end is arranged in the spherical groove of the spherical crown support plate. Compared with the prior art, the invention has the advantages of no eccentricity in rotation, accurate stress, reliable tension and compression resistance and the like.

Inventors

  • ZHANG YUCHEN
  • XIANG YANG
  • LI GUOQIANG

Assignees

  • 同济大学

Dates

Publication Date
20260508
Application Date
20260313

Claims (10)

  1. 1. The eccentric steel structure-free spherical hinge support with tensile and compressive resistance is characterized by comprising a perforated support plate (1), a spherical crown support plate (2), a long screw (3) and a spherical head nut (4); The perforated support plate (1) is a lower support plate, a spherical groove (12) is formed in the upper surface of the perforated support plate, and a through internal threaded hole (13) is formed in the center of the spherical groove (12); The spherical crown support plate (2) is an upper support plate, a convex spherical crown (22) is arranged on the lower surface of the spherical crown support plate, a spherical groove (23) is arranged in the center of the upper surface of a square plate (21) of the spherical crown support plate (2), and a wedge-shaped cavity (24) penetrating in the vertical direction is arranged in the center of the convex spherical crown (22); The lower end of the long screw rod (3) is provided with a lower screw rod (32), the lower screw rod (32) is in threaded connection with the internal threaded hole (13) of the perforated support plate (1), and the upper end of the long screw rod (3) is provided with an upper screw rod (33); the ball nut (4) comprises a ball end (41), a hexagonal cylinder end (42) and a transition cylinder section (43), an internal threaded hole (44) is formed in the center of the ball nut (4), the ball nut (4) is in threaded connection with the upper side screw (33) of the long screw (3) through the internal threaded hole (44), and the ball end (41) is accommodated in the spherical groove (23) of the spherical crown support plate (2); the spherical center of the ball nut (4), the spherical curvature center of the convex spherical crown (22) of the spherical crown support plate (2) and the spherical curvature center of the spherical groove (12) of the perforated support plate (1) are overlapped, and the overlapping point is positioned at the center of the upper surface of the spherical crown support plate (2).
  2. 2. The eccentric-steel-structure-free spherical hinge support with tensile and compressive resistance as claimed in claim 1, wherein a polytetrafluoroethylene plate is adhered in the spherical groove (12) of the perforated support plate (1), and a silicone grease lubricant is filled between the polytetrafluoroethylene plate and the convex spherical crown (22) of the spherical crown support plate (2).
  3. 3. The eccentric-free steel structure spherical hinge support with tensile and compressive resistance as claimed in claim 1, wherein the surface of the convex spherical crown (22) of the spherical crown support plate (2) is subjected to hard chromium electroplating.
  4. 4. The non-eccentric steel structure spherical hinge support with tensile and compressive resistance as claimed in claim 1, wherein the surface of the spherical end (41) of the ball nut (4) is subjected to hard chromium electroplating.
  5. 5. The spherical hinge support without eccentric steel structure with tensile and compressive resistance according to claim 1, wherein the cross section of the middle section (31) of the long screw (3) is hexagonal.
  6. 6. The eccentric-steel-structure-free spherical hinge support with pull-press resistance according to claim 1, wherein the periphery of the perforated support plate (1) is provided with an arc-shaped groove (14), and an anchor bolt hole (15) is formed in the arc-shaped groove (14).
  7. 7. The non-eccentric steel structure spherical hinge support with tensile and compressive resistance as claimed in claim 6, further comprising an anchor bolt (5), wherein said anchor bolt (5) passes through said anchor bolt hole (15) to anchor said perforated support plate (1) to a lower foundation.
  8. 8. The eccentric-free steel structure spherical hinge support with tensile and compressive resistance according to claim 7, wherein the lower foundation is pre-provided with pre-buried holes (6) corresponding to the anchor bolt holes (15) of the perforated support plate (1), and the pre-buried holes (6) are internally provided with steel sleeves (7); The spherical hinge support is fixed on the lower foundation through an anchor bolt (5) penetrating through the anchor bolt hole (15) and the steel sleeve (7).
  9. 9. The eccentric-free steel structure spherical hinge support with tensile and compressive resistance as claimed in claim 7, wherein a bottom cushion layer (8) formed by epoxy mortar is filled between the bottom surface of the perforated support plate (1) and the lower foundation top surface.
  10. 10. The eccentric-free steel structure spherical hinge support with tensile and compressive resistance according to claim 1, wherein the upper surface of the spherical crown support plate (2) is connected with the end part of an upper structural member, and the perforated support plate (1) is connected with a lower foundation through an anchor bolt (5).

Description

Eccentric-steel-structure-free spherical hinge support with tensile and compressive resistance Technical Field The invention relates to the technical field of structural engineering of constructional engineering technology, in particular to a spherical hinge support with a non-eccentric steel structure and pull-press resistance. Background The steel fixed spherical hinge support has the advantages of high bearing capacity, strong rotation capacity, good durability and maintainability and the like. The support can bear larger vertical shaft pressure, can transfer horizontal force and allow the end parts of the supported components to rotate in a larger amplitude, and is widely applied to the fields of bridge engineering, large-span space structures, special structures and the like in the field of building structures. The existing steel fixed spherical hinge support consists of an upper support plate, a lower support plate adhered with a polytetrafluoroethylene plate and a spherical crown lining plate. The spherical crown lining board is fixedly connected with the upper support board, the convex spherical surface of the spherical crown lining board is treated by adopting a stainless steel cladding or hard chromium electroplating process, the grooves of the lower support board and the polytetrafluoroethylene board are firmly adhered by epoxy resin, and the spherical crown lining board and the convex spherical surface of the spherical crown lining board are filled with silicone grease lubricant. The structure can effectively bear and transmit horizontal and vertical forces, effectively reduce friction resistance of a spherical contact interface and improve durability of the support. The conventional construction form has two problems that (1) the curvature radius of a spherical panel of a common spherical hinge support is generally large, and the actual rotation center of the support is positioned at a certain height above the support. In the structural calculation model, the assumed hinge point position is generally the support position, and a certain height difference exists between the support position and the actual rotation center of the spherical hinge point. Under the condition of large rotation angle or when the integral deformation of the structure is large, the height difference generates non-negligible additional internal force, so that the actual stress state of the structure is deviated from a calculation model, and the safety of the structure is further influenced. (2) In large spans, high floors or special structures, the complex dynamic action (wind load, earthquake action, etc.) or temperature action borne by the structure can cause the tensile force, namely the pulling-up force, of part of the support. However, the existing steel fixed spherical hinge support cannot form an effective and stable tensile force transmission path, and cannot be applied to support application scenes with upward pulling force. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides the eccentric-free steel structure spherical hinge support with pull-press resistance, which rotates without eccentricity, can ensure that the constraint state of the support is accurately matched with a structural system calculation model and no secondary/eccentric internal force is generated in a component, has reliable tensile capacity, can resist support pulling force possibly occurring in the scenes of heavy load, nonlinearity, strong catastrophe and the like, and provides reliable hinge boundary constraint for a structure. The aim of the invention can be achieved by the following technical scheme: The invention adopts novel elements such as the special ball nut, the spherical crown support plate (upper support plate) and the perforated support plate (lower support plate) and effectively connects the elements in series, thereby effectively overcoming two problems of the traditional spherical hinge support. Advantages of the novel mount include that first, the center of rotation of the ball pivot joint is highly coincident with the mount location (bottom surface of the member). The concave spherical surface of the lower support plate of the spherical hinge support and the convex spherical surface of the support plate of the spherical crown are coincided with the center of the ball nut, so that the hinge point position defined in the structural analysis model can be ensured to coincide with the actual rotation center of the component. Under the scene of large rotation angle, the rotation center of each element is unchanged, and no secondary internal force is generated in the support and the connected components, so that the consistency of the actual stress of the structure and the design calculation result is ensured. Secondly, the ball hinge node has reliable tensile capacity while releasing rotation constraint. The upper end of the long screw rod in the node is fixed in the groove of the uppe