Purlin sliding connection node for integrated construction of metal roof and construction method

Abstract

The application discloses a purlin sliding connection node and a construction method for integrated construction of a metal roof, the node comprising a first purlin, a second purlin and a steel sleeve core, the steel sleeve core being inserted into the inner walls of the first purlin and the second purlin, the end of the steel sleeve core being provided with a plurality of long round holes, and a connecting bolt for temporarily fixing the second purlin being arranged in the long round holes. The steel sleeve core is inserted into the main purlins to achieve temporary connection in the integrated construction process, and the effect of internal force is released, forming a connection node which is temporarily fixed during construction but allows a certain degree of relative sliding, effectively adapting to the deformation of the main steel structure. After the structure is unloaded and stable, the final welding is carried out, which can ensure the safety of the integrated construction stage of the metal roof and ensure the stability and durability of the final structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building steel structure, more particularly to a purlin sliding connection node for integrated construction of metal roof and a construction method. BACKGROUND

[0002] With the continuous improvement of the building industry on efficient construction technology and quality requirements, the integrated construction technology of metal roof emerges as the times require, which highly integrates the installation process of steel structure components and metal roof, and installs the metal roof in the ground assembly stage, so that the roof system can be installed in place with the integrated construction of steel structure, effectively avoiding the complexity and risk of high-altitude scattered installation. However, due to the poor adaptability of the upper main purlin welding node of the integrated construction to structural deformation, stress concentration is easily generated at the node, which leads to loose connection of the purlin and leakage, and even causes deformation and damage of the roof panel structure, affecting the safety and durability of the roof system.

[0003] CN205116413U discloses a tent structure, which specifically discloses (see its specification

[0030] paragraph, Figures 1-2 ): Specifically, the first inclined beam 102 and the second inclined beam 103 each include two hollow inclined beams and a sleeve joint connecting the two hollow inclined beams. In the disclosed tent structure, although the connection method of the inclined beam is involved, the sleeve joint arranged in the two inclined beams solves the technical problem of realizing detachable connection and size adjustment of the tent. However, the ordinary circular hole on the steel sleeve does not release the internal force of the node.

[0004] Therefore, it is urgent to develop an innovative node structure and a matching construction method to effectively control the deformation of the purlin during the integrated construction.

[0005] In view of this, the present application is made. SUMMARY

[0006] The present application provides a purlin sliding connection node for integrated construction of metal roof and a construction method, which solves the deficiency of the existing integrated construction technology of metal roof.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a purlin sliding connection node for integrated construction of metal roof, comprising a first purlin, a second purlin and a steel sleeve core, the steel sleeve core is inserted into the inner walls of the first purlin and the second purlin, the end of the steel sleeve core is provided with a plurality of long circular holes, and a connecting bolt for temporarily fixing the second purlin is arranged in the long circular hole.

[0008] The end of the steel sleeve core is provided with a plurality of long round holes on both sides, which are inserted into the inner walls of the first purlin and the second purlin, so as to achieve temporary connection in the integrated construction process, release the effect of internal force, and then be fixed after the completion of the main structure construction. The total gap of the steel sleeve core inserted into the inner walls of the first purlin and the second purlin is 4mm, and the steel sleeve core is not welded during the integrated construction process. After the unloading deformation stress is eliminated, the steel sleeve core is welded. The broken joint position of the steel sleeve core and the second purlin is temporarily fixed by bolts passing through the long round holes, and the connecting bolts are fastened after unloading to adapt to the deformation of the main steel structure.

[0009] Further, the first purlin and the second purlin are connected with a purlin support and fixed by welding.

[0010] Further, the first purlin and the second purlin are continuous purlins, and the cross section is a rectangular tube cross section.

[0011] Further, the connecting bolt is a 5.6-grade ordinary galvanized bolt.

[0012] The construction method of the purlin sliding connection node for integrated construction of a metal roof comprises the following steps:

[0013] Step one, during ground assembly, the steel sleeve core is inserted into the inner walls of the first purlin and the second purlin, and the steel sleeve core is not welded during the integrated construction process;

[0014] Step two, the broken joint position of the steel sleeve core and the second purlin is temporarily fixed by connecting bolts passing through the long round holes, and the ground installation of the purlin structure is completed;

[0015] Step three, the ground-installed purlin structure is integrated with the main structure;

[0016] Step four, after the integrated construction is in place, the bolts are fastened after the completion of the unloading of the overall structure, and then the steel sleeve core is welded and fixed with the first purlin. The use of the bolts is completed in two stages. The bolts are not completely fastened during the integrated construction, and are fastened after the integrated construction is in place and the overall structure is unloaded.

[0017] In summary, the steel sleeve core is inserted into the inner walls of the first purlin and the second purlin, which achieves temporary connection in the integrated construction process, releases the effect of internal force, forms a connection node that is temporarily fixed during construction but allows a certain degree of relative sliding, effectively adapts to the deformation of the main steel structure. After the structure is unloaded and stable, the final welding and fixing are performed, which can ensure the safety of the integrated construction stage of the metal roof and ensure the stability and durability of the final structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view of the purlin sliding connection node for integrated construction of a metal roof.

[0019] Figure 2 Figure 1 is a top view of a purlin sliding connection node for integrated construction of a metal roof according to the present application.

[0020] Legend: 1, first purlin; 2, second purlin; 3, purlin support; 4, steel sleeve core; 5, connecting bolt; 6, long round hole. DETAILED DESCRIPTION

[0021] The following will be further described in detail in combination with the accompanying drawings Figures 1-2 The purlin sliding connection node for integrated construction of a metal roof and the construction method according to the present application will be further described in detail.

[0022] The purlin sliding connection node for integrated construction of a metal roof and the construction method according to the present application comprises a first purlin 1, a second purlin 2, a purlin support 3, a steel sleeve core 4, and a connecting bolt 5. The steel sleeve core 4 is provided with a plurality of long round holes 6 on both sides of the end portion, and is inserted into the inner walls of the first purlin 1 and the second purlin 2 to achieve temporary connection during the integrated construction process, while releasing the effect of internal force. After the completion of the main structure construction, the steel sleeve core 4 is welded and fixed with the first purlin 1. The total gap between the steel sleeve core 4 and the inner walls of the first purlin 1 and the second purlin 2 is 4 mm, and the steel sleeve core 4 is not welded during the integrated construction process. After the unloading deformation stress is eliminated, the steel sleeve core 4 is welded to form a transition of the continuous purlin. The steel sleeve core 4 and the second purlin 2 are temporarily fixed by the bolt 5 passing through the long round hole at the joint, and the bolt 5 is tightened after unloading to adapt to the deformation of the main steel structure. The connecting bolt 5 is a 5.6-grade ordinary galvanized bolt. The first purlin 1 and the second purlin 2 are continuous purlins with a rectangular tube cross section. The first purlin 1 and the second purlin 2 are fixed with the purlin support 3 by welding during the integrated construction.

[0023] The first purlin and the second purlin according to the present application belong to the purlin system of the metal roof, and the purlin is located above the main structure beam-column system, mainly serving to support the roof and ensure the structural stability and deformation adaptability of the roof.

[0024] The technical problem solved by the steel sleeve core in the present application is not for detachable connection and size adjustment, but for temporary connection and release of the effect of internal force of the node by the special steel sleeve core with long round holes and the purlin. The present application emphasizes that the end portion of the steel sleeve core is provided with a plurality of long round holes. The problem solved is the loosening of the purlin connection caused by stress concentration at the node in the field of integrated construction.

[0025] The bolt is tightened after the completion of the unloading of the overall structure, and the steel sleeve core is welded and fixed with the first purlin. Compared with the conventional welding technology, the present application has the following differences:

[0026] Welding opportunity is different: it is common knowledge to realize the fixed connection between two metal products by welding, but the difference of the application is the specific opportunity of welding in the construction process, generally welding operation is directly carried out in the integrated construction, and then the overall structure is unloaded, the application emphasizes that the steel sleeve core is not welded temporarily in the integrated construction, but needs to wait until the integrated construction is in place, and then the welding is fixed after the overall structure is unloaded.

[0027] Welding purpose is special: the application is not only a simple fixed connection problem, but also through the reasonable welding opportunity selection in the integrated construction process, the special effect of firm connection of steel sleeve core and first purlin and releasing node stress is achieved.

[0028] A construction method of purlin sliding connection node for integrated construction of metal roof, mainly comprising the following steps:

[0029] Step one, during ground assembly, the steel sleeve core 4 is inserted into the inner wall of the first purlin 1 and the second purlin 2, and the steel sleeve core 4 is not welded temporarily during the integrated construction.

[0030] Step two, the connecting bolt 5 is used to temporarily fix the steel sleeve core 4 and the second purlin 2 at the joint position, and the ground installation of the purlin structure is completed.

[0031] Step three, the purlin structure installed on the ground is integrated with the main structure.

[0032] Step four, after the integrated construction is in place, the connecting bolt 5 is fastened, and then the steel sleeve core 4 and the first purlin 1 are welded and fixed, the bolt is used in two stages, the bolt is not completely fastened during the integrated construction, and the bolt is fastened after the integrated construction is in place and the overall structure is unloaded.

[0033] The above is only the preferred embodiment of the application, the protection scope of the application is not limited to the above embodiment, and any technical solution belonging to the idea of the application is within the protection scope of the application. It should be noted that for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the application are also considered as the protection scope of the application.

Claims

1. A construction method for purlin sliding connection nodes in integrated metal roofing construction, characterized in that, The connection node includes a first purlin, a second purlin, and a steel sleeve. The steel sleeve is inserted into both sides of the inner wall of the first and second purlins, and a gap is reserved between the steel sleeve and the inner wall of the purlin. The end of the steel sleeve is provided with several elongated holes, and connecting bolts for temporary fixation to the second purlin are provided in the elongated holes. The first purlin and the second purlin are connected to purlin brackets and fixed by welding. The construction method includes the following steps: Step 1: During ground assembly, insert the steel core into the inner walls of the first and second purlins. The steel core is not welded during the integrated construction process. Step 2: Use connecting bolts to temporarily fix the steel sleeve core and the joint of the second purlin through the elongated hole to complete the ground installation of the purlin structure; Step 3: Integrate the purlin structure, which has been installed on the ground, with the main structure during construction. Step 4: After the integrated construction is completed and the overall structure is unloaded, tighten the bolts and then weld the steel sleeve core to the first purlin. The bolt tightening is done in two stages: during the integrated construction, the bolts are not fully tightened first, and then finally tightened after the overall structure is unloaded.

2. The construction method for purlin sliding connection nodes for integrated metal roofing construction according to claim 1, characterized in that: The first purlin and the second purlin are continuous purlins with a rectangular tube cross-section.

3. The construction method for purlin sliding connection nodes for integrated metal roofing construction according to claim 1, characterized in that: The connecting bolts are 5.6 grade ordinary galvanized bolts.

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