Middle joint of welding-free PEC structure
By adopting a modular design for the weld-free PEC structure and replacing welding with high-strength bolt connections, the problems of low construction efficiency and insufficient rigidity in traditional steel structure node connections are solved, achieving efficient and stable node connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional steel structure joint connections involve complex welding processes, low construction efficiency, residual welding stress leading to deformation, high requirements for the construction environment, insufficient joint stiffness, and unclear force transmission paths.
The system adopts a weld-free PEC structure, which consists of weld-free PEC composite columns composed of H-beams and node ring steel plates, combined with multiple circular cross-section steel rods and I-beams. High-strength bolts are used to replace welding, and the modular design achieves full bolt connection.
It improves construction speed and quality, avoids welding deformation, enhances node stiffness, provides multiple force transmission paths, and is suitable for industrialized prefabricated steel structure buildings.
Smart Images
Figure CN224048371U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to structural engineering technical field, and the steel part wraps concrete column and steel beam joint structure, specifically relates to a middle joint of welding-free PEC structure. BACKGROUND
[0002] In traditional steel structure, the joint of column and beam mostly adopts welding connection, and its main purpose is to ensure that the joint has enough rigidity. With the development of building field, new technology is continuously introduced into the field of structural joint connection, which promotes the extensive research of domestic and foreign scholars. However, in the process of on-site construction, the traditional welding mode has the following problems:
[0003] 1. The welding process is complex, and professional welders are needed to operate, so the construction efficiency is low.
[0004] 2. Welding residual stress easily leads to joint deformation, which affects the structural precision.
[0005] 3. On-site welding has high requirements for construction environment and poor adaptability. Although there are some bolt connection schemes in the prior art, there are problems such as insufficient joint rigidity and unclear force transmission path. CONTENT OF THE UTILITY MODEL
[0006] To solve the above technical problems, the utility model aims at providing a middle joint of welding-free PEC structure.
[0007] The middle joint of welding-free PEC structure of the utility model comprises a welding-free PEC combined column, a plurality of circular cross-section transverse steel bars, four I-beams and a plurality of L-shaped steel plates. The welding-free PEC combined column is prefabricated from an H-shaped steel and two joint ring-shaped steel plates. One joint ring-shaped steel plate is arranged at each of the upper end and the lower end of the H-shaped steel at the position of the pre-connected I-beam. The plurality of circular cross-section transverse steel bars are welded between the two flanges of the H-shaped steel and between the lower end joint ring-shaped steel plate and the bottom of the H-shaped steel. The four I-beams are assembled on the H-shaped steel between the two joint ring-shaped steel plates through the plurality of L-shaped steel plates and are fastened and connected through high-strength bolts. The I-beam and the joint ring-shaped steel plate are fastened and connected through high-strength bolts.
[0008] Further, two rows of first reserved through holes are arranged on the web and the flange of the H-shaped steel between the two joint ring-shaped steel plates, and the positions of the first reserved through holes on the two flanges of the H-shaped steel correspond to each other. The horizontal positions of the first reserved through holes on the web and the flange of the H-shaped steel are aligned.
[0009] Further, the joint ring-shaped steel plate is prefabricated from two steel plates arranged on the two sides of the web of the H-shaped steel and two steel plates arranged on the outer sides of the two flanges of the H-shaped steel to form an integral whole. Two rows of second reserved through holes are arranged on the four steel plates constituting the joint ring-shaped steel plate.
[0010] Further, the four I-beams are assembled in two groups between the H-shaped steel between the two node ring-shaped steel plates; first connecting through holes are arranged on the connecting ends of the webs of the I-beams; second connecting through holes matched with the second reserved through holes of the node ring-shaped steel plates are arranged on the connecting ends of the flanges of the I-beams; two rows of third connecting through holes matched with the first reserved through holes of the H-shaped steel and the first connecting through holes of the I-beams are arranged on the L-shaped steel plates; the web of each I-beam in the first group of I-beams is connected to the two sides of the web of the H-shaped steel through two L-shaped steel plates, and the upper and lower flanges of the first group of I-beams are connected to the node ring-shaped steel plates at the upper and lower ends through high-strength bolts; the web of each I-beam in the second group of I-beams is connected to the two flanges of the H-shaped steel through two L-shaped steel plates, and the upper and lower flanges of the second group of I-beams are connected to the node ring-shaped steel plates at the upper and lower ends through high-strength bolts.
[0011] Further, a plurality of circular cross-section transverse steel bars are welded equidistantly and parallel between the two flanges of the H-shaped steel.
[0012] The intermediate node of the welding-free PEC structure is characterized in that the welding-free PEC combined column composed of the H-shaped steel and the node ring-shaped steel plate, the L-shaped steel plate and the circular cross-section transverse steel bar are modularly designed, the traditional welding process is replaced by full bolt connection, the node connection method is free of welding, the on-site construction speed and construction quality are greatly improved, and the node connection method is suitable for industrialized fabricated steel structure buildings. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 is a schematic view of the intermediate node of the welding-free PEC structure of the utility model;
[0014] Fig. 2 is an exploded view of the intermediate node of the welding-free PEC structure of the utility model;
[0015] Fig. 3 is a structural schematic view of the welding-free PEC combined column of the utility model;
[0016] 1-H-shaped steel; 11-web of the H-shaped steel; 12-flange of the H-shaped steel; 13-first reserved through hole; 2-node ring-shaped steel plate; 21-second reserved through hole; 3-high-strength bolt; 4-circular cross-section transverse steel bar; 5-I-beam; 51-web of the I-beam; 52-first connecting through hole; 53-flange of the I-beam; 54-second connecting through hole; 6-L-shaped steel plate; 61-third connecting through hole. DETAILED DESCRIPTION
[0017] As Figs. 1-3As shown, the utility model discloses a kind of intermediate nodes of welding-free PEC structure, comprising: welding-free PEC combined column, multiple round cross section cross steel poles 4, four I-beams 5 and multiple L-shaped steel plates 6.Welding-free PEC combined column is prefabricated by H-shaped steel 1 and two node ring-shaped steel plates 2, and each is equipped with a node ring-shaped steel plate 2 in the upper and lower ends of H-shaped steel 1 pre-connection I-beam 5 place.Multiple round cross section cross steel poles 4 are welded between the two flanges of H-shaped steel and between the bottom of node ring-shaped steel plate 2 and H-shaped steel 1 at lower end, greatly improve the structural strength of welding-free PEC combined column whole.The above prefabrication work is all completed in factory.Site construction, four I-beams 5 are assembled to H-shaped steel 1 between two node ring-shaped steel plates 2 by multiple L-shaped steel plates 6 and are fastened by high-strength bolt 3 connection;I-beam 5 and node ring-shaped steel plate 2 also adopt high-strength bolt 3 fastening connection.Site construction whole process does not need welding, greatly speeds up the site construction speed and construction quality.
[0018] As shown, Fig. 2 As shown, two rows of first reserved through holes 13 are provided on the web 11 of H-shaped steel between two node ring-shaped steel plates 2 and the flange 12 of H-shaped steel, and the positions of the first reserved through holes 13 on the flange 12 of two H-shaped steels correspond to each other;The horizontal positions of the first reserved through holes 13 on the web 11 of H-shaped steel and the flange 12 of H-shaped steel are aligned.
[0019] The node ring-shaped steel plate 2 is prefabricated into a whole by two steel plates respectively located on both sides of the web of H-shaped steel and two steel plates located on the outer sides of the two flanges of H-shaped steel;Two rows of second reserved through holes 21 are provided on the four steel plates constituting the node ring-shaped steel plate 2.
[0020] Four I-beams 5 are assembled in pairs on H-shaped steel 1 between two node ring-shaped steel plates 2.In the connection end of the web 51 of I-beam, a first connection through hole 52 is provided;In the connection end of the flange 53 of I-beam, a second connection through hole 54 is provided, which cooperates with the second reserved through hole 21 of the node ring-shaped steel plate 2, and two rows of third connection through holes 61 are provided on the L-shaped steel plate, which respectively cooperate with the first reserved through hole 13 of H-shaped steel and the first connection through hole 52 of I-beam.The web 51 of each I-beam in the first group of I-beams is connected to both sides of the web 11 of H-shaped steel by two L-shaped steel plates 6, and the upper and lower flanges of the first group of I-beams are connected to the node ring-shaped steel plates 2 at the upper and lower ends by high-strength bolts 3.The web 51 of each I-beam in the second group of I-beams is connected to the flange 12 of H-shaped steel by two L-shaped steel plates 6, and the upper and lower flanges of the second group of I-beams are connected to the node ring-shaped steel plates 2 at the upper and lower ends by high-strength bolts 3.
[0021] During construction, the four I-beams 5 are respectively placed in the middle and leveled between the two node ring-shaped steel plates 2 of the non-welding PEC composite column, the first group of I-beams 5 is assembled close to the web 11 of the H-shaped steel, the second group of I-beams 5 is assembled close to the flange 12 of the H-shaped steel, and the extension direction of the four I-beams 5 corresponds to the direction of the four side walls of the H-shaped steel 1. After the L-shaped steel plate is assembled, it is fastened and connected through high-strength bolts.
[0022] A plurality of round cross-section transverse steel rods 4 are welded between the two flanges of the H-shaped steel at equal intervals and in parallel.
[0023] The utility model realizes the full bolt connection of PEC composite column and I-beam, avoids welding deformation and residual stress through full bolt connection, improves construction quality, prefabrication work of the non-welding PEC composite column of the utility model is all completed in the factory, high-strength bolts can be directly used for assembling on site, the fastening work of high-strength bolts is convenient and fast, construction speed is greatly improved, the node ring-shaped steel plate and L-shaped steel plate form multiple force transmission paths, and the node stiffness is high.
[0024] The above only describes the preferred embodiment of the utility model and does not limit the thought of the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A middle node of a solderless PEC structure, characterized by, The application relates to a welding-free PEC combined column, a plurality of round-section cross-tying steel bars, four I-beams and a plurality of L-shaped steel plates. The welding-free PEC combined column is prefabricated from an H-shaped steel and two node ring-shaped steel plates, one node ring-shaped steel plate is arranged at the upper end of the H-shaped steel pre-connected I-beam, and one node ring-shaped steel plate is arranged at the lower end of the H-shaped steel pre-connected I-beam; the plurality of round-section cross-tying steel bars are welded between the two flanges of the H-shaped steel and between the lower-end node ring-shaped steel plate and the bottom of the H-shaped steel; the four I-beams are assembled to the H-shaped steel between the two node ring-shaped steel plates through the plurality of L-shaped steel plates and are fastened and connected through high-strength bolts; the I-beams and the node ring-shaped steel plates are fastened and connected through high-strength bolts.
2. The intermediate node of the weldless PEC structure of claim 1, wherein, Two rows of first reserved through holes are arranged on the web and the flanges of the H-shaped steel between the two node ring-shaped steel plates, the positions of the first reserved through holes on the two flanges of the H-shaped steel are one-to-one corresponding, and the horizontal positions of the first reserved through holes on the web and the flanges of the H-shaped steel are aligned.
3. The intermediate node of a weldless PEC structure of claim 2, wherein, The node ring-shaped steel plate is prefabricated from two steel plates located on the two sides of the web of the H-shaped steel and two steel plates located on the outer sides of the two flanges of the H-shaped steel to form an integral whole, and two rows of second reserved through holes are arranged on the four steel plates constituting the node ring-shaped steel plate.
4. The intermediate node of the weldless PEC structure of claim 3, wherein, The four I-beams are assembled in pairs on the H-shaped steel between the two node ring-shaped steel plates; a first connecting through hole is arranged on the connecting end of the web of the I-beam; a second connecting through hole matched with the second reserved through hole of the node ring-shaped steel plate is arranged on the connecting end of the flange of the I-beam; two rows of third connecting through holes matched with the first reserved through holes of the H-shaped steel and the first connecting through holes of the I-beam are arranged on the L-shaped steel plate; the web of each I-beam in the first group of I-beams is connected to the two sides of the web of the H-shaped steel through two L-shaped steel plates, and the upper and lower flanges of the first group of I-beams are connected to the node ring-shaped steel plates at the upper and lower ends through high-strength bolts; the web of each I-beam in the second group of I-beams is connected to the two flanges of the H-shaped steel through two L-shaped steel plates, and the upper and lower flanges of the second group of I-beams are connected to the node ring-shaped steel plates at the upper and lower ends through high-strength bolts.
5. The intermediate node of the weldless PEC structure of claim 1, wherein, The plurality of round-section cross-tying steel bars are welded equidistantly and parallelly between the two flanges of the H-shaped steel.