CN-121992875-A - Steel construction building beam column assembled node in booster station

CN121992875ACN 121992875 ACN121992875 ACN 121992875ACN-121992875-A

Abstract

The invention provides a steel structure building beam column assembly type node in a booster station, which belongs to the technical field of low-rise building assembly type steel structures and comprises a square steel column, wherein a composite hole is prefabricated on the side wall of the square steel column, the composite hole comprises an upper guide hole, a lower locking hole and a rectangular chute communicated with the upper guide hole and the lower locking hole, an in-column diaphragm is arranged in the square steel column and welded and fixed with the inner wall of the square steel column, an inward convex shear key is welded on the surface of one side of the in-column diaphragm facing the composite hole, a T-shaped connecting piece comprises a vertical plate and a horizontal plate, an integral T-shaped member is formed by vertically welding the vertical plate and the horizontal plate, a groove matched with the inward convex shear key is formed on the inner surface of the vertical plate, and a high-strength bolt connecting pair solves the technical problems that a bolt cannot be penetrated from the inside due to the closed section of the square steel column, the integrity of the section of the external connection is weakened, and the bolt is easily broken by shearing and tension composite effect.

Inventors

MA QIANGQIANG
HAN YUHUI
CAI XINGBIN
ZHAO WENHAO

Assignees

中建八局发展建设有限公司

Dates

Publication Date: 20260508
Application Date: 20260401

Claims (10)

1. Steel construction building beam column assembled node in booster station, its characterized in that includes: The side wall of the square steel pipe column is prefabricated with a composite hole, the composite hole comprises an upper guide hole, a lower locking hole and a rectangular chute communicated with the two holes, and the diameter of the guide hole is larger than that of the locking hole; The column inner diaphragm is arranged in the square steel column and welded and fixed with the inner wall of the square steel column, an inward convex shear key is welded on the surface of one side of the column inner diaphragm facing the composite hole, and the position of the inward convex shear key corresponds to the locking hole and stretches into the locking hole to form embedding and fixing; The T-shaped connecting piece comprises a vertical plate and a horizontal plate, wherein the vertical plate and the horizontal plate are vertically welded to form an integral T-shaped member, the outer side surface of the vertical plate is attached to the outer wall of the square steel pipe column, the inner side surface of the vertical plate is provided with a groove matched with the inward convex shear key, and one end, far away from the vertical plate, of the horizontal plate is connected with an H-shaped steel beam through a bolt; the high-strength bolt connection pair sequentially passes through the mounting hole on the vertical plate, the locking hole and the corresponding hole on the inter-column diaphragm plate, the T-shaped connecting piece is in fastening connection with the square steel pipe column, the inward convex shear key is embedded with the groove to form a shear force transmission structure, and the shear force transmission structure bears the horizontal shear force of the node.
2. The steel structure building beam column assembly type node in a booster station according to claim 1, wherein the inward convex shear key is a cylindrical or square column steel member, the root of the inward convex shear key is welded with the diaphragm plate in the column in a full penetration manner, the length of the free end of the inward convex shear key extending into the locking hole is not less than 1.5 times of the wall thickness of the square steel column, and an assembly gap of not more than 2mm is reserved between the end face of the inward convex shear key and the inner side surface of the vertical plate.
3. The steel structure building beam column assembly type node in a booster station according to claim 2, wherein the groove is a round or square counter bore formed in the inner side surface of the vertical plate, the depth of the groove is matched with the length of the inward protruding shear key extending into the locking hole, the side wall of the groove is in clearance fit with the side wall of the inward protruding shear key, and the fit clearance is controlled to be 0.5 mm-1.5 mm.
4. The steel structure building beam column assembly type node in a booster station according to claim 3, wherein the mounting hole on the vertical plate is a circular through hole, the center line of the mounting hole coincides with the center line of the locking hole, the diameter of the mounting hole is equal to the diameter of the locking hole and slightly larger than the diameter of a bolt rod of the high-strength bolt connection pair, the large hexagon head of the high-strength bolt connection pair is positioned in the guide hole, and the bolt rod penetrates through the rectangular sliding groove to enter the locking hole.
5. The steel structure building beam column assembly type node in a booster station according to claim 4, wherein diaphragm plate bolt holes are formed in positions, corresponding to the locking holes, on the diaphragm plates in the columns, the center lines of the diaphragm plate bolt holes coincide with the center lines of the locking holes, the tail ends of bolt rods of the high-strength bolt connection pairs penetrate through the diaphragm plate bolt holes and are fastened through nuts, the inward-protruding shear keys are arranged around the diaphragm plate bolt holes, and the distance between the outer walls of the inward-protruding shear keys and the edges of the diaphragm plate bolt holes is not smaller than 10mm.
6. The booster station inner steel structure building beam column assembly type node according to claim 5, wherein local thickened steel plates are welded on the outer wall surfaces of square steel columns around the composite holes, the local thickened steel plates cover the periphery areas of the guide holes and the locking holes, the thickness of the local thickened steel plates is 1.2-2.0 times of the wall thickness of the square steel columns, and the outer surfaces of the local thickened steel plates are in direct contact with the inner side surfaces of the vertical plates to form friction type connecting interfaces.
7. The steel structure building beam column assembly type node in a booster station according to claim 6, wherein a vertical stiffening plate is welded between a vertical plate and a horizontal plate of the T-shaped connecting piece, the vertical stiffening plate is a triangular or trapezoid steel plate, a right-angle side of the vertical stiffening plate is welded with the vertical plate, the other right-angle side of the vertical stiffening plate is welded with the horizontal plate, and the arrangement position of the vertical stiffening plate avoids the axis of a bolt rod of the high-strength bolt connection pair.
8. The steel structure building beam column assembly type node in a booster station according to claim 7, wherein horizontal stiffening plates are welded on the upper surface and the lower surface of each horizontal plate, each horizontal stiffening plate is a strip-shaped steel plate and is perpendicular to the longitudinal axis of each horizontal plate, one end, close to the vertical plate, of each horizontal stiffening plate is welded and fixed with the vertical plate, a plurality of bolt holes for connecting the H-shaped steel beams are formed in each horizontal plate, and the bolt holes are located between the adjacent horizontal stiffening plates.
9. The booster station inner steel structure building beam column assembly type node according to claim 8, wherein the ratio of the cross-sectional area of the inner convex shear key to the cross-sectional area of the locking hole is 0.6-0.8, the steel strength grade of the inner convex shear key is higher than that of the square steel pipe column, and the design value of the shearing bearing capacity of the inner convex shear key after being embedded with the groove is 1.2 times of the design level shear of the node.
10. The steel structure building beam column assembly node in a booster station according to claim 9, wherein the T-shaped connecting piece comprises an upper T-shaped piece and a lower T-shaped piece which are respectively arranged at the upper flange and the lower flange of the H-shaped steel beam, the structures of the upper T-shaped piece and the lower T-shaped piece are symmetrically arranged about the neutral axis of the H-shaped steel beam, and grooves on vertical plates of the upper T-shaped piece and the lower T-shaped piece are respectively embedded with the inward convex shear keys at corresponding positions to form an up-down symmetrical shear force transmission system.

Description

Steel construction building beam column assembled node in booster station Technical Field The invention belongs to the technical field of low-rise building assembly type steel structures, and particularly relates to a steel structure building beam column assembly type node in a booster station. Background With the continuous deepening of building industrialization and assembly construction modes, steel structures play an increasingly important role in modern buildings due to the advantages of high strength, fast construction, recyclable materials and the like. The booster station is used as a key infrastructure of a power system, and the internal steel structure building of the booster station has strict requirements on safety, durability and construction efficiency. The beam column node is used as a core part for transmitting bending moment and shearing force in the steel structure, the connection performance of the beam column node directly influences the mechanical behavior, stability and shock resistance of the whole structure, and meanwhile, the construction assembly efficiency and the full life cycle cost are related, so that the beam column node becomes an important research topic in the field of steel structure engineering. Currently, the steel structure beam column connection in the booster station mainly adopts two modes of welding connection and bolt connection. The welding connection is easy to realize automatic manufacture under the factory prefabrication condition, the welding seam is continuous and uniform and has reliable mechanical property, but the field welding is limited by factors such as construction environment, personnel technical level and the like, the quality fluctuation is obvious, and the efficiency is lower. In contrast, the bolt connection has the characteristics of high assembly degree and strong adaptability to construction conditions, and is more in line with the construction logic of modular assembly of the assembled building. However, for closed section members such as square steel pipe columns, the traditional bolt connection technology faces remarkable technical bottlenecks that the closed section of the square steel pipe column leads to narrow internal space, bolts cannot penetrate through the column, the field installation operability is extremely poor, the existing external connection structure often needs to be provided with large hand holes on the column wall or adopts a complex sectional assembly process, the integrity of the column section is seriously weakened, the bearing capacity and fatigue resistance of a node are reduced, in addition, the bolts of the traditional node usually bear the combined action of shearing force and tensile force at the same time, brittle shear damage easily occurs under the action of strong earthquake, the ductility performance is insufficient, and the requirements of high anti-seismic fortification of important electric facilities such as a booster station are difficult to meet. Disclosure of Invention In view of the above, the invention provides a steel structure building beam column assembly type node in a booster station, which solves the technical problems that bolts cannot be penetrated from inside due to the closed section of a square steel pipe column, the integrity of the section of the column is weakened by traditional external connection, and the bolts are subject to brittle failure due to the shearing and tension combined action. The invention is realized in the following way: the invention provides a steel structure building beam column assembly type node in a booster station, which comprises the following components: The side wall of the square steel pipe column is prefabricated with a composite hole, the composite hole comprises an upper guide hole, a lower locking hole and a rectangular chute communicated with the two holes, and the diameter of the guide hole is larger than that of the locking hole; The column inner diaphragm is arranged in the square steel column and welded and fixed with the inner wall of the square steel column, an inward convex shear key is welded on the surface of one side of the column inner diaphragm facing the composite hole, and the position of the inward convex shear key corresponds to the locking hole and stretches into the locking hole to form embedding and fixing; The T-shaped connecting piece comprises a vertical plate and a horizontal plate, wherein the vertical plate and the horizontal plate are vertically welded to form an integral T-shaped member, the outer side surface of the vertical plate is attached to the outer wall of the square steel pipe column, the inner side surface of the vertical plate is provided with a groove matched with the inward convex shear key, and one end, far away from the vertical plate, of the horizontal plate is connected with an H-shaped steel beam through a bolt; the high-strength bolt connection pair sequentially passes through the mounting hole on the ver