PEC vertical component and PEC vertical component connecting joint

Abstract

The utility model relates to a PEC vertical member and PEC vertical member connection node, the PEC vertical member comprises a steel skeleton and concrete, the upper end and the lower end of the steel skeleton are provided with opening sections, the steel skeleton comprises a web and flanges, the flanges are perpendicular to the web, the two sides of the web are respectively provided with longitudinal steel bars and transverse stirrups, the longitudinal steel bars and the stirrups are bound and fixed, and the concrete is arranged in the web. End plates are welded to the open sections of the two ends of the steel framework respectively, the end plates are perpendicularly connected with the web, the open sections of the steel framework are covered with the end plates, vertical stiffening plates perpendicular to the end plates are welded to the end plates at intervals, the vertical stiffening plates on the end plates at the upper open section and the lower open section are opposite in orientation, and the space between the end plates at the upper open section and the lower open section is filled with concrete. And when the two PEC vertical components are vertically connected, the end plates at the connecting ends of the two vertical components are attached, and a circle of each end plate is subjected to surrounding welding. According to the utility model, the construction process of the node is simplified, the construction efficiency is improved, and the reliable force transmission of the connecting node area is ensured.

Description

Technical Field

[0001] The utility model relates to the field of prefabricated buildings, in particular to a PEC vertical component and a PEC vertical component connection node. Background Art

[0002] With the rapid development of prefabricated and green, low-carbon buildings in my country, partially encased steel-concrete composite structures, combining the advantages of both concrete and steel structures, are sweeping the country, driving the industrialization of my country's construction industry. In the residential sector, partially encased steel-concrete vertical components (hereinafter referred to as "PEC vertical components") include PEC composite columns and PEC composite shear walls. PEC composite shear walls include various types, such as "straight-shaped shear walls," "L-shaped shear walls," and "T-shaped shear walls." PEC vertical components are widely used due to their high bearing capacity, high rigidity, easy installation, concealment within the wall, and low cost.

[0003] Figure 1 The figure shows one of the structures of the vertical connection node of PEC composite columns in the prior art. Currently, PEC composite columns and PEC composite shear walls are usually composed of H-shaped steel as the main steel frame, with longitudinal steel bars 4 and stirrups 7 set on both sides of the web of the main steel frame, and then concrete 3 is filled on both sides of the web of the main steel frame. Whether it is a PEC composite column or a PEC composite shear wall, the vertical connection node structure is the same. For the sake of convenience, it is collectively referred to as "PEC vertical member". Figure 1 For example, the structure of the PEC vertical component connection node in the prior art is as follows: when the PEC vertical components are prefabricated in the factory, an area is reserved at the connection end without pouring concrete. This area is the node post-casting area 8. During vertical connection at the construction site, the web and flange of the main steel frame of the upper PEC vertical component 1 are butt-welded to the web and flange of the main steel frame of the lower PEC vertical component 2 respectively. The longitudinal steel bars 4 in the node post-casting area 8 are welded and connected by lap steel bars 6. The stirrups 7 in the node post-casting area 8 are densified. A partition 5 is set at the boundary line between the filled concrete 3 of the upper PEC vertical component 1 and the lower vertical PEC component 2 and the node post-casting area 8. Finally, concrete is cast in place in the node post-casting area 8. This connection method has the following defects: the construction process is complicated and requires the sequential work of multiple types of workers such as steel structure installers, welders, formwork workers, and concrete workers to complete the node connection, which is not conducive to construction management and has high construction costs. In addition, cracks are prone to occur at the interface between the pre-cast concrete part of the PEC component completed in the factory and the cast-in-place concrete part in the node post-casting area 8.

[0004] In order to avoid the problems pointed out above, the utility model discloses a "partially coated steel reinforced concrete column vertical splicing node structure" with the publication number CN210530135U, which also reserves a section of area at the connecting end of the upper and lower PEC columns without pouring concrete, and uses a web splice plate to connect the webs of the upper and lower PEC columns together at the construction site, and then uses a post-welded steel plate to close the connecting area. The patent uses a post-welded steel plate at the node area to replace the cast-in-place concrete connection method, which makes up for some of the above-mentioned deficiencies, but it still requires the installation of a web splice plate before welding the post-welded steel plate, and the operation steps are still relatively many, and the concrete of the upper and lower PEC columns is disconnected at the node area, so the force transmission effect is inevitably not as good as that of continuous concrete. Utility model content

[0005] The utility model discloses a PEC vertical component first, be applicable to PEC combined column also, be applicable to PEC combined shear wall, PEC vertical component field construction connection, only need the connecting end of upper and lower PEC vertical component butt joint welding can, avoid wet operation, can keep the upper and lower PEC vertical component's concrete upper and lower force transmission continuous.

[0006] In order to realize the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] PEC vertical component, including steel skeleton and concrete, the upper and lower two ends of steel skeleton have open section, steel skeleton includes web and flange, the flange is perpendicular to the web, the both sides of web are respectively equipped with longitudinal reinforcement and transverse stirrup, longitudinal reinforcement and stirrup are tied and fixed, the both ends open section of steel skeleton are respectively welded end plate, end plate is connected with web perpendicularly, end plate covers the open section of steel skeleton, vertical stiffener is welded on end plate perpendicularly, the vertical stiffener on end plate at upper and lower open section faces each other, and the end plate between upper and lower open section is filled with concrete.

[0008] Further, the web of the steel skeleton is provided with a through web hole in the longitudinal direction, and the connecting steel bars are passed through the web hole to connect the longitudinal steel bars and the stirrups on both sides of the web.

[0009] Further, the outer flange of the steel skeleton not covered by the concrete is provided with an ear plate, and a fixing hole is formed in the ear plate.

[0010] Further, the ear plate is arranged on the side end face of the outer flange, and the ear plate is parallel to the outer flange.

[0011] Further, the end plate is embedded between the two side flanges of the steel skeleton, and the outer surface of the end plate is flush with the end face of the open section of the steel skeleton.

[0012] Further, the horizontal section of the end plate is larger than the open section of the steel skeleton, and the end plate is welded on the flange end surface of the steel skeleton.

[0013] Based on the PEC vertical member given above, the utility model discloses a PEC vertical member connecting joint, including the upper PEC vertical member and lower PEC vertical member of same structure, the connecting end of upper PEC vertical member and lower PEC vertical member is vertically docked, and the end plate of the lower part of upper PEC vertical member and the end plate of the upper part of lower PEC vertical member mutually adhere, and the adhered end plate is welded in a circle.

[0014] The utility model discloses when prefabricating PEC vertical member, the end plate welded with stiffened plate in connecting end closes open section, through the mode such as reasonable design butt weld, end plate thickness, stiffened plate's thickness and arrangement position, still can guarantee the reliable force transmission of component vertical connecting joint area under the condition that the engineering error that possibly appears in the process of PEC vertical member docking installation is considered, thereby avoid the lap joint of longitudinal reinforcement of vertical component in connecting area and the post-pouring of node area, simplify the construction technology of PEC vertical component connection as a whole, reduce manufacturing cost, improve construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of PEC combined column vertical connecting joint in the prior art;

[0016] Figure 2 It is the internal structure diagram of PEC combined column before pouring concrete in the embodiment of the utility model;

[0017] Figure 3 It is a structure schematic view of PEC combined column vertical connecting joint in the embodiment of the utility model;

[0018] Figure 4 It is Figure 3 The sectional view of 1-1;

[0019] Figure 5 It is Figure 3 The sectional view of 2-2;

[0020] Figure 6 It is a schematic view of L-shaped PEC combined shear wall connecting joint in the embodiment of the utility model;

[0021] Figure 7 It is Figure 6 The sectional view of A-A;

[0022] Figure 8 It is Figure 6 The sectional view of B-B.

[0023] REFERENCE SIGNS:

[0024] 1, upper PEC vertical member; 2, lower PEC vertical member; 3, filled concrete; 4, longitudinal steel bars; 5, partition plate; 6, lapping steel bars; 7, stirrup; 8, node post-pouring area; 9, flange; 10, web; 11, end plate; 12, vertical stiffening plate; 13, web hole; 14, connecting steel bars; 15, connecting plate; 16, lug plate; 17, bolt; 18, butt weld; 19, main steel skeleton; 20, vertical stiffening plate of shear wall. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model.

[0026] Embodiment 1: This embodiment discloses a PEC combined column and a vertical connecting node of the PEC combined column, as shown in the drawings, the PEC combined column located at the upper part is called "upper PEC vertical member 1", the PEC combined column located at the lower part is called "lower PEC vertical member 2", and the steel skeleton in the PEC combined column adopts H-shaped steel, the H-shaped steel includes flanges 9 and webs 10 on both sides, and the assembly of the steel skeleton and the filling of the concrete 3 are all prefabricated in a factory. Figures 2 to 5 As shown in the drawings, the internal structure of the PEC combined column is as shown in the drawings, and the H-shaped steel is used as the steel skeleton in the PEC combined column. Figure 2 As shown in the direction, the end plates 11 are respectively welded on the open sections at the upper and lower ends of the H-shaped steel, as shown in the drawings, the end plates 11 are omitted in the middle part of the drawings to show the upper open section. Figure 2 The end plates 11 are perpendicular to the flanges 9 on both sides, and the open sections of the H-shaped steel are covered and closed by the end plates 11. Figure 2 There are two welding modes for the end plates 11: the first mode is as shown in the drawings, and the second mode is as shown in the drawings. Figure 2As shown, the end plate 11 is embedded between the flanges 9 on both sides of the H-beam, so that the outer surface of the end plate 11 (i.e., the side away from the web 10) is flush with the end face of the flange 9. When welding the end plate 11, the two ends of the end plate 11 are welded to the inner walls of the flanges 9 on both sides, and the inner end of the end plate 11 is welded to the web 10. The second method (omitted in the figure) is to weld the end plate 11 directly to the end face of the flange 9 of the H-beam, that is, the horizontal cross-section of the end plate 11 is larger than the open cross-section of the H-beam. Vertical stiffeners 12 perpendicular to the end plates 11 are welded at intervals on each side of the end plate 11. The vertical stiffeners 12 on the upper and lower end plates 11 of the H-beam face each other. Longitudinal steel bars 4 and transverse stirrups 7 are provided on both sides of the web 10, and the longitudinal steel bars 4 and stirrups 7 on the same side are tied and fixed. The web 10 of the traditional PEC component has no holes, and concrete needs to be poured on both sides separately. The longitudinal steel bars 4 and stirrups 7 on both sides of the web 10 are also not connected to each other. However, in order to connect the longitudinal steel bars 4 and stirrups 7 on both sides of the web 10 and thus improve the connection strength, in this embodiment, through web holes 13 are further provided on the web 10 along the longitudinal intervals, and connecting steel bars 14 are passed through the web holes 13, so that the two ends of the connecting steel bars 14 are respectively connected to the longitudinal steel bars 4 and stirrups 7 on both sides of the web 10. After the above connection is completed, concrete 3 is filled in the area between the upper and lower end plates 11 on both sides of the web 10. Since the web holes 13 are provided on the web 10, the concrete 3 can also be poured directly in a single-sided manner.

[0027] Further for the vertical connection of PEC composite columns, such as Figures 3 to 5 As shown, in this embodiment, ear plates 16 are welded to the flanges 9 on both sides of each PEC composite column in advance in the factory. An ear plate 16 is welded to each of the two side ends of each flange 9. The ear plates 16 are parallel to the flanges 9, and fixing holes are provided on the ear plates 16 at vertical intervals.

[0028] The vertical connection nodes of the PEC composite columns in this embodiment are as follows: Figures 3 to 5 As shown, the upper and lower PEC vertical components are first aligned by hoisting, and the lower end of the upper PEC vertical component 1 is vertically butted against the upper end of the lower PEC vertical component 2, so that the end plate 11 at the lower part of the upper PEC vertical component 1 and the end plate 11 at the upper part of the lower PEC vertical component 2 are in contact with each other. After the alignment is completed, the lug plate 16 at the connecting end of the upper PEC vertical component 1 and the lug plate 16 at the connecting end of the lower PEC vertical component 2 are fixedly connected by bolts 17 using the connecting plate 15 to ensure that the verticality and horizontal positioning of the two connected PEC vertical components meet the requirements, and then the bolts 17 are tightened. After the lug plate 16 is connected, a circumferential welding operation is performed along a circle of the two contacting end plates 11 to form a circle of butt welds 18. After the circumferential welding operation is completed, the lug plate 16 on the upper PEC vertical component 1 and the lug plate 16 on the lower PEC vertical component 2 are removed.

[0029] The embodiment 2 discloses a PEC composite shear wall and a vertical connecting joint of the PEC composite shear wall.

[0030] For simplification of description, the embodiment and the accompanying drawings take the L-shaped PEC composite shear wall as an example for description. Figure 8 As shown in the figure, the main steel skeleton 19 in the L-shaped PEC composite shear wall is long in the middle web, and the vertical stiffening plates 20 are usually added on both sides of the web in the middle region. The PEC composite shear wall in the embodiment has the end plates 11 welded at the upper and lower ends, respectively, and the vertical stiffening plates 12 are also arranged at intervals on the end plates 11. The lug plates 16 are welded on the outer flange side end surface of the main steel skeleton 19, and the longitudinal steel bars 4 and the stirrups 7 are arranged on both sides of the web of the main steel skeleton 19, respectively. The web holes are vertically arranged on the web, and the connecting steel bars 14 are arranged through the holes. The region between the upper and lower end plates 11 and the outer flanges at both ends of the web of the main steel skeleton 19 is filled with the concrete 3. The structure of the embodiment is similar to that described in the embodiment 1. The vertical connecting joint of the L-shaped PEC composite shear wall is shown in the figure, which is connected by the end plate 11 at the lower part of the upper L-shaped PEC composite shear wall and the end plate 11 at the upper part of the lower L-shaped PEC composite shear wall, and the surrounding welding. Figures 6 to 8 The embodiment is not described in detail, and the structure can be arranged according to the structure given in the embodiment 1.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. PEC vertical components, including a steel frame and concrete, with open sections at the upper and lower ends of the steel frame. The steel frame includes a web and flanges, the flanges are perpendicular to the web, and longitudinal steel bars and transverse stirrups are provided on both sides of the web. The longitudinal steel bars and stirrups are tied and fixed. The characteristics are: The end plates are respectively welded on the open sections at the two ends of the steel framework, the end plates are perpendicularly connected with the web plates, the end plates cover the open sections of the steel framework, vertical stiffening plates are spaced welded on the end plates and perpendicularly to the end plates, the vertical stiffening plates on the end plates at the upper and lower open sections face each other, and the end plates at the upper and lower open sections are filled with concrete.

2. The PEC vertical member of claim 1, wherein: Through holes are spaced apart and longitudinally arranged on the web plates of the steel framework, and connecting steel bars are arranged in the through holes to connect the longitudinal steel bars and the stirrups on both sides of the web plates.

3. The PEC vertical member of claim 1, wherein: Ear plates are arranged on the outer flanges of the steel framework which are not covered by the concrete.

4. The PEC vertical member of claim 3, wherein: The ear plates are arranged on the side end faces of the outer flanges, and the ear plates are parallel to the outer flanges.

5. The PEC vertical member of claim 1, wherein: The end plates are embedded between the two side flanges of the steel framework, and the outer surfaces of the end plates are flush with the end faces of the open sections of the steel framework.

6. The PEC vertical member of claim 1, wherein: The horizontal sections of the end plates are larger than the open sections of the steel framework, and the end plates are welded on the end faces of the flanges of the steel framework.

7. A PEC vertical member connection node, characterized by: The PEC vertical member comprises upper and lower PEC vertical members which are identical in structure, the connecting ends of the upper and lower PEC vertical members are vertically butted, the end plate at the lower part of the upper PEC vertical member is in close contact with the end plate at the upper part of the lower PEC vertical member, and the abutting end plates are surrounded by welding.

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