Deck type connecting method for inverted triangular pipe truss and plant column

Abstract

The invention discloses a deck type connecting method for an inverted triangular pipe truss and a plant column. The deck type connecting method is characterized by comprising the following steps that a, an upper chord plane closing-in beam support (1) is arranged at the end of the inverted triangular pipe truss; b, longitudinal short beams (4) are arranged on the tops of the plant columns; c, arranging a field connecting surface of the inverted triangular pipe truss and the plant column on the upper surface of a longitudinal short beam at the top of the plant column; d, the inverted triangular pipe truss end closing-in beam support (1) is connected with a longitudinal short beam (4) at the top of a plant column through installation bolts and field welding seams; e, the longitudinal short beam (4) and a short beam inclined strut (5) are arranged at the top of the plant column and used for supporting the inverted triangular pipe truss end closing-in beam support (1) to transmit loads; and f, the inverted triangular truss lower chord is connected with the plant column body in an inner sleeve mode. The device has the advantages of being reasonable in structural design, simple in component arrangement and number, attractive in appearance, convenient to install, small in safety risk and small in crane machine team.

Description

Technical Field

[0001] The invention relates to a steel structure factory roof system design, in particular to an upper bearing connection method of an inverted triangle tube truss and a factory column. Background Art

[0002] In recent years, the inverted triangle tube truss has won the favor of structural engineers for its technical rationality, economy and aesthetics when used as the main beam section of the factory roof. It has been increasingly adopted in the design of various factory roof structures. [1] .

[0003] The connection between the inverted triangle tube truss and the plant column can be made by two connection methods: the upper bearing type and the lower bearing type. In existing engineering examples, the lower bearing type is mostly used for the connection between the inverted triangle tube truss and the plant column. Figure 1 The following is a schematic diagram of the known inverted triangle tube truss and plant column bottom-supported connection method. The bottom-supported connection has the following defects: (1) The roof system of the factory building is not only the main bearer of the factory building roof load, but also the horizontal structure that integrates the horizontal frames and vertical columns of the factory building. Its in-plane stiffness (referred to as roof stiffness) ensures that the horizontal frames and vertical columns form a whole and work together. The roof stiffness is mainly formed by roof panels, roof purlins, roof water bracing support components, etc. The surface where the roof stiffness is located is mainly reflected in the upper chord plane of the tube truss. When the inverted triangle tube truss is connected to the factory building column by the bottom support, the connection support is on the lower chord of the tube truss. There is a spatial offset X between the roof stiffness surface and the connection support of the factory building column. The existence of this offset adds additional internal forces to the upper and lower chords and vertical webs of the tube truss when bearing loads horizontally. At the same time, the support system in the plane of the lower chord of the tube truss has to be strengthened, which leads to an increase in the project cost. Figure 3 It is a schematic diagram of the misalignment structure between the surface where the stiffness of the inverted triangle tube truss roof is located and the column top support.

[0004] (2) When the inverted triangle tube truss is connected to the plant column by the bottom support type, the end of the inverted triangle tube truss must be provided with an end vertical support. Otherwise, the end of the inverted triangle tube truss only relies on the point support at the top of the column, which cannot form an effective constraint and cannot ensure its own stability. The function of the end vertical support overlaps with the function of the tie rod at the top of the plant column, which increases the project cost.

[0005] (3) During the construction and installation stage, when the inverted triangle tube truss is hoisted as a whole to the top of the factory column, the point support of the inverted triangle tube truss cannot form an effective end constraint, and the end vertical support needs to be installed at the same time. That is, the inverted triangle tube truss and the end vertical support must be assembled and installed in the air at the same time, which increases the construction difficulty and safety risks and increases the construction machinery unit cost. Summary of the invention

[0007] The purpose of the present invention is to provide a safe and reliable top-bearing connection method for an inverted triangle tube truss and a plant column.

[0008] To achieve the above purpose, the technical solution of the present invention is: A method for connecting an inverted triangle tube truss to a plant column in a top-bearing manner, characterized by comprising the following steps: a. The upper chord plane closing beam support is set at the end of the inverted triangle tube truss to collect the axial force transmitted from the upper chord rod, the upper chord end eight-shaped brace and the end vertical web rod of the inverted triangle tube truss at the closing beam through the connecting plug plate; b. A longitudinal short beam is set on the top of the plant column, and a short beam diagonal brace is set at the bottom of the longitudinal short beam. The longitudinal short beam on the top of the column is set horizontally, and the short beam diagonal brace is an inverted eight-shaped brace. The bottom end of the inverted eight-shaped brace is supported on the plant column near the elevation of the lower chord of the pipe truss, and the upper ends of the inverted eight-shaped brace are supported on the lower part of the longitudinal short beam; c. The on-site connection surface between the inverted triangle tube truss and the plant column is set on the upper surface of the longitudinal short beam on the top of the plant column; d. The connection between the end beam support of the inverted triangle tube truss and the longitudinal short beam on the top of the plant column is connected by installation bolts and on-site welding or permanent bolts; e. Longitudinal short beams and short beam diagonal braces are set on the top of the plant column to support the load transmitted from the end beam support of the inverted triangle tube truss. The longitudinal short beams and short beam diagonal braces are connected to the top tie rods of the plant column and are part of the top tie rod system; f. The lower chord of the inverted triangle truss and the column of the factory building are connected to each other by means of an inner sleeve to accommodate the on-site error between the lower chord of the truss and the column.

[0009] The top-bearing connection method of the inverted triangle tube truss and the plant column of the present invention can be further implemented by adopting the following technical measures.

[0010] In the aforementioned method, the closing beam support and other components of the inverted triangle tube truss are integrally manufactured by a processing plant.

[0011] In the aforementioned method, the longitudinal short beams, short beam diagonal braces and plant columns are integrally manufactured in a processing plant.

[0012] After adopting the above technical solution, the top-bearing connection method of the inverted triangle tube truss and the plant column of the present invention has the following advantages: (1) The position of the roof stiffness surface is consistent with the support surface of the factory column connection, which avoids the problem of misalignment between the roof stiffness surface and the support surface of the factory column connection in the bottom-supported connection.

[0013] (2) The inverted triangular tube truss transmits the roof load, internal force and deformation to the longitudinal short beam and short beam diagonal brace at the top of the column through the end beam support. The force transmission path is clear. Whether it is installed with bolts and on-site welds or permanent bolts, its bearing capacity can be determined by calculation. The method is conventional and the result is reliable.

[0014] (3) The longitudinal short beams and short beam diagonal braces at the top of the columns are manufactured in the factory on the columns of the factory building. After the column top tie rod system is installed, the inverted triangular tube truss is placed on the longitudinal short beam through the end beam support and temporarily fixed with installation bolts. There is no problem of unstable ends of the inverted triangular tube truss during installation, and there is no need to set up vertical supports at the ends. It is easy to install, has low safety risks, and requires fewer crane machine shifts.

[0015] (4) The vertical support of the inverted triangle tube truss is eliminated, which saves construction cost compared to the bottom-supported connection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the known inverted triangle tube truss and the bottom-supported connection method of the plant column; Figure 2 for Figure 1 Sectional view of AA in the middle; Figure 3 It is a schematic diagram of the dislocation structure between the surface where the stiffness of the inverted triangle tube truss roof is located and the column top support; Figure 4 It is a schematic plan view of the top-bearing connection method between the inverted triangle tube truss and the plant column of the present invention; Figure 5 It is a schematic elevation view of the inverted triangle tube truss and the top-bearing connection method of the plant column of the present invention; Figure 6 for Figure 5 Sectional view of aa in the figure; Figure 7 for Figure 5 Cross-sectional view of the middle bb; Figure 8 It is a schematic diagram of the connection relationship between the inverted triangle tube truss roof and the top of the factory building column of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with embodiments and accompanying drawings.

[0018] Example 1 Please refer to Figures 4 to 7 , the top-bearing connection method of the inverted triangle tube truss and the plant column of the present invention: (1) An upper chord plane end beam support 1 is provided at the end of the inverted triangle tube truss to collect the axial forces transmitted from the upper chord rod, the upper chord end eight-shaped brace 2 and the end vertical web rod at the end beam through the connecting plug plate 3. The end beam support 1 and other components of the inverted triangle tube truss are integrally manufactured by the processing plant or assembled on site.

[0019] (2) A longitudinal short beam 4 is arranged on the top of the factory (warehouse) column, and a short beam diagonal brace 5 is arranged at the lower part of the longitudinal short beam. The longitudinal short beam 4 and the short beam diagonal brace 5 at the top of the column are integrally manufactured together with other components of the factory (warehouse) column in the processing plant.

[0020] (3) The on-site connection surface between the inverted triangle tube truss and the factory (warehouse) column is on the upper surface of the longitudinal short beam at the top of the factory (warehouse) column.

[0021] (4) The connection between the end beam support 1 of the inverted triangle tube truss and the longitudinal short beam 4 at the top of the plant column can be made by installing bolts and on-site welding, or by permanent bolts, see Figure 4 and Figure 5 .

[0022] (5) The longitudinal short beams 4 and short beam diagonal braces 5 are arranged on the top of the factory building columns. In addition to supporting the load transmitted from the end beam support 1 of the inverted triangle tube truss, the longitudinal short beams 4 and short beam diagonal braces 5 are connected to the tie rods at the top of the factory building columns and are part of the tie rod system at the top of the columns (including the inter-column support system). No new components are added to the column system.

[0023] (6) The lower chord of the inverted triangle truss is connected to the column of the factory building by an inner sleeve method to accommodate the on-site error between the lower chord of the truss and the column.

[0024] The method for using the top-bearing connection method of the inverted triangle tube truss and the plant column of the present invention is as follows: (1) The splayed brace 2 at the end of the upper chord plane of the roof truss is an important measure to transmit the axial force of the upper chord rod to the top of the column and must be installed. The cross section of the splayed brace 2 is determined by calculation.

[0025] (2) A connecting plate 3 must be installed between the end vertical web members and the upper chord. This is an important measure to ensure that the upper chord, the end vertical web members, and the end beam support are reliably connected to each other. The thickness and size of the connecting plate 3 are determined by bearing capacity calculation.

[0026] (3) Vertical supports are not required at the ends of the inverted triangle trusses and can be replaced by column top tie rods. The column top tie rods can be directly connected to the longitudinal short beams.

[0027] (4) Longitudinal short beam braces must be installed. The short beam braces should extend to the vicinity of the lower chord elevation of the pipe truss of the factory (warehouse) column. The position of the lower end of the brace can be used as the lateral support for calculating the length of the factory (warehouse) column outside the plane.

[0028] (5) The cross-section of the longitudinal short beam and the short beam diagonal brace needs to be determined through calculation. When the end beam support and the longitudinal short beam at the top of the column are connected by welds, the end beam support and the longitudinal short beam at the top of the column can be regarded as an integral component to verify the strength and deformation under adverse working conditions during use.

[0029] (6) When this method is used, the horizontal structure of the factory building can be calculated using a two-dimensional model, and the inverted triangular tube truss is hinged in the plane of the column top connection.

[0030] The present invention has substantial characteristics and significant technical progress. The characteristics of the top-bearing connection method of the inverted triangle tube truss and the plant column of the present invention are as follows: (1) A closing beam support 1 is provided at the end of the inverted triangular tube truss. The whole tube truss component is reliably connected to the longitudinal short beam 4 and the short beam diagonal brace 5 at the top of the factory building column through the closing beam support, so as to realize the simple transmission of load and internal force between the inverted triangular tube truss and the factory (warehouse) building column, and form a transverse frame structure of the inverted triangular tube truss and the factory (warehouse) building column.

[0031] (2) Longitudinal short beams and short beam diagonal braces are set at the top of the column. In addition to bearing the load and internal force of the inverted triangular tube truss transmitted from the receiving beam support to the factory (warehouse) column, the longitudinal short beams and short beam diagonal braces at the top of the column are connected to the column top tie rod system. The column top tie rod system (including the inter-column support in the column row) ensures the stability of the end of the inverted triangular tube truss, and there is no need to set vertical supports at the end of the inverted triangular tube truss.

[0032] (3) An eight-shaped brace 2 is set on the upper chord plane of the inverted triangle truss. The function of the eight-shaped brace is to transmit the axial force of the two upper chords of the inverted triangle tube truss more directly to the center of the top of the factory column through the end beam support, so as not to cause the longitudinal short beam at the top of the column to bear too much horizontal force and cause out-of-plane deformation.

[0033] (4) The short beam diagonal brace provided at the lower part of the longitudinal short beam can eliminate the vertical deformation of the cantilever end of the longitudinal short beam, and reliably transmit the axial force of the vertical web member at the end of the inverted triangle tube truss to the factory (warehouse) column, and can also bear the uneven force caused by the asynchronous loading of the roof on the two upper chords.

[0034] (5) In actual construction, the column top tie rod system (including the inter-column support in the column row) is generally installed first (this is no different from other forms of roof main beam structure). After the longitudinal column row stability system is formed, the inverted triangle tube truss can be directly placed on the longitudinal short beam at the top of the column through the end beam support. Since the end beam support and the column top are in line contact rather than point contact, there is no problem of unstable installation and no additional measures are required. After correction, the formal connection is formed by installing bolts and adding on-site welds or using permanent bolts.

[0035] The above embodiments are only for the purpose of illustrating the present invention, but not for limiting the present invention. A person skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A method for connecting an inverted triangle tube truss with a plant column, characterized in that The following steps are involved: a. An upper chord plane closing beam support (1) is provided at the end of the inverted triangular tube truss to collect the axial forces transmitted from the upper chord rod, the upper chord end eight-shaped brace (2) and the end vertical web rod of the inverted triangular tube truss at the closing beam through a connecting plug plate (3); b. A longitudinal short beam (4) is arranged on the top of the factory building column, and a short beam diagonal brace (5) is arranged at the lower part of the longitudinal short beam. The longitudinal short beam on the top of the column is arranged horizontally, and the short beam diagonal brace is an inverted eight-shaped brace. The bottom end of the inverted eight-shaped brace is supported on the factory building column near the elevation of the lower chord of the pipe truss, and the upper ends of the inverted eight-shaped brace are supported on the lower part of the longitudinal short beam; c. The on-site connection surface between the inverted triangle tube truss and the plant column is set on the upper surface of the longitudinal short beam on the top of the plant column; d. The connection between the end end beam support (1) of the inverted triangle tube truss and the longitudinal short beam (4) at the top of the plant column is made by installing bolts and on-site welding or by permanent bolt connection; e. A longitudinal short beam (4) and a short beam diagonal brace (5) are arranged at the top of the plant column to support the load transmitted from the end beam support (1) of the inverted triangular tube truss. The longitudinal short beam (4) and the short beam diagonal brace (5) are connected to the tie rod at the top of the plant column and are components of the tie rod system at the top of the column; f. The lower chord of the inverted triangle truss and the column of the factory building are connected to each other by means of an inner sleeve to accommodate the on-site error between the lower chord of the truss and the column.

2. The method for connecting the inverted triangle tube truss with the plant column as claimed in claim 1, characterized in that: The closing beam support (1) and other components of the inverted triangle tube truss are integrally manufactured by a processing plant.

3. The method for connecting the inverted triangle tube truss with the plant column as claimed in claim 1, characterized in that: The longitudinal short beams (4), the short beam diagonal braces (5) and the plant columns are integrally manufactured in a processing plant.

Images