Reinforced concrete triangular roof truss bearing structure

Abstract

The utility model relates to the technical field of zigzag plant top transformation, in particular to a reinforced concrete triangular roof truss bearing structure which comprises a plurality of triangular roof trusses, and in the x direction, every two triangular roof trusses are connected through horizontally-arranged horizontal stress rods; the horizontal stress rod is arranged on the oblique beam of the triangular roof truss and is perpendicular to the oblique beam of the triangular roof truss; existing triangular roof trusses are used for maintaining the arrangement of the top of the plant in the y-axis direction, meanwhile, horizontal stress rods arranged in the transverse direction are additionally arranged to be connected with the two adjacent triangular roof trusses in the x-axis direction, the plane out-of-plane stability of the two adjacent triangular roof trusses in the x-axis direction in the transverse direction is improved, and therefore a space stress system of the plant roof in the transverse and longitudinal directions is achieved. The anti-seismic capacity and the anti-collapse capacity are remarkably improved, meanwhile, disassembly, replacement, damage or change of an original structure are reduced, time and labor are saved, the cost is saved, the working efficiency is improved, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of the transformation of triangular roof trusses, in particular to a load-bearing structure of a reinforced concrete triangular roof truss. Background Art

[0002] In the early factory construction, prefabricated triangular roof trusses were arranged in sequence along the y-axis direction to form a zigzag shape. At the same time, the zigzag members formed by connecting multiple triangular roof trusses in sequence were arranged at intervals along the x-axis direction, so that the triangular roof trusses corresponded to each other in pairs in the x-axis direction, forming a load-bearing system for the factory building roof in a zigzag shape.

[0003] The zigzag factory building is assembled on site by prefabricated components such as bent columns (T-shaped concrete columns), air duct girders, concrete triangular trusses, and precast slabs from bottom to top. The connection between the T-shaped columns and the air duct girders, and between the air duct girders and the triangular roof trusses is realized by spot welding between the embedded steel plates, so that the root of each triangular roof truss member is a hinged end, and the top of the triangular roof truss is a free end; and there are no any rods connecting between the reinforced concrete triangular trusses in the x-axis direction.

[0004] The lateral support and restraint between the concrete triangular roof trusses in the x-axis direction are only provided by components such as the precast slabs on the roof, the window sill plates, window edge plates, and steel window frames between the triangular roof trusses. There is a lack of stiffness between the concrete triangular roof trusses in the x-axis direction, and there are potential safety hazards in the self-stability of the concrete triangular roof trusses outside the plane, resulting in poor integrity, poor stability, poor seismic performance, and poor anti-collapse performance of the factory building structure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a load-bearing structure of a reinforced concrete triangular roof truss to solve the technical problem of low out-of-plane stability at the top of the existing zigzag factory building.

[0006] The technical problem solution of the utility model:

[0007] A load-bearing structure of a reinforced concrete triangular roof truss includes a plurality of triangular roof trusses. In the x-axis direction, the triangular roof trusses are connected to each other by horizontally arranged horizontal load-bearing rods; the horizontal load-bearing rods are arranged on the inclined beams of the triangular roof trusses and are perpendicular to the inclined beams of the triangular roof trusses.

[0008] Further defined, the horizontal load-bearing rods are connected to the tops of the inclined beams of the triangular roof trusses.

[0009] Further defined, the horizontal load-bearing rods are also connected to the tails of the inclined beams of the triangular roof trusses.

[0010] Further defined, the horizontal load-bearing rods are connected to the triangular roof trusses through connecting plates.

[0011] Further defined, the connecting plate includes first connecting plates arranged on opposite sides of the triangular roof truss. The first connecting plates on opposite sides are connected by screws, and the horizontal load-bearing rod is connected to the triangular roof truss through the first connecting plate on the same side.

[0012] Further defined, the connecting plate further includes a second connecting plate arranged on the horizontal load-bearing rod. The second connecting plate is connected to the horizontal load-bearing rod by high-strength bolts, and the second connecting plate is welded to the corresponding first connecting plate.

[0013] Further defined, the number of the high-strength bolts is multiple, and the multiple high-strength bolts are arranged at equal intervals along the height direction of the second connecting plate.

[0014] Further defined, in the y-axis direction, adjacent triangular roof trusses are connected by T-shaped columns to form a zigzag shape, and the T-shaped columns are connected to the corresponding triangular roof trusses through air duct girders.

[0015] Further defined, the horizontal load-bearing rod connected to the tail of the inclined beam of the triangular roof truss is arranged outside the connection node between the tail of the inclined beam and the gutter wall panel.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. Utilize the existing triangular roof trusses to maintain the layout of the factory building roof in the longitudinal direction. At the same time, add horizontal load-bearing rods arranged in the transverse direction to connect two adjacent triangular roof trusses in the x-axis direction, improve the transverse stiffness and the ability to bear horizontal load of two adjacent triangular roof trusses in the x-axis direction, enhance the stability, ductility and deformation coordination ability of the roof load-bearing structure system, thus forming a spatial stress system with double constraints in the transverse and longitudinal directions, significantly improving its seismic resistance and anti-collapse ability, while reducing the damage or change to the original structure, saving time and effort, saving costs, improving work efficiency, and meeting the use requirements.

[0018] 2. Ensure the stability of two triangular roof trusses in the x-axis direction by setting a horizontal load-bearing rod at the tail end of the inclined beam of the triangular roof truss, enhance the lateral stiffness of the triangular roof truss, improve the ductility of the roof load-bearing structure system and the deformation ability of the structure, and ensure the out-of-plane stability of the concrete triangular roof truss; rigidly connect the horizontal load-bearing rod to the top and tail of the inclined beam of the triangular roof truss through the connecting plate to ensure reliable connection with the existing structure, avoid damage at the connection node and the interface with the existing structure, and ensure the coordinated force and deformation of the horizontal load-bearing rod and the existing structure, as much as possible avoiding the stress lag and strain lag phenomena of the horizontal load-bearing rod; in addition, the present utility model has strong construction operability, low transformation cost, is simple and fast, and saves the construction period. Description of the Drawings

[0019] Figure 1 It is a top view structural schematic diagram of multiple triangular roof trusses of the present utility model;

[0020] Figure 2 is Figure 1 the schematic cross-sectional view in the A-A direction in

[0021] Figure 3 is the schematic diagram of the partial connection between the triangular roof truss and the T-shaped column of the present utility model;

[0022] Figure 4 is the schematic diagram of the connection between the horizontal load-bearing rod and the high-end vertical column of the triangular roof truss of the present utility model;

[0023] Figure 5 is Figure 3 the schematic diagram of the partial sectional structure in the B-B part in

[0024] Figure 6 is the schematic diagram of the connection between the horizontal load-bearing rod and the end column of the inclined beam of the triangular roof truss of the present utility model;

[0025] 1 - Horizontal load-bearing rod; 2 - Triangular roof truss; 3 - Connecting plate; 4 - First connecting plate; 4a - Screw; 5 - Second connecting plate; 5a - High-strength bolt; a - T-shaped column; b - Air duct girder; c - Air duct cover plate; d - Upper gutter plate. Specific implementation manners

[0026] According to the requirements of Section 9.1, Appendix J, and Appendix K of the "Code for Seismic Design of Buildings" GB50011 - 2010 (2016 Edition), the single-story industrial building should be subjected to transverse and longitudinal seismic checks. For the sawtooth-shaped factory building with a triangular roof truss as the load-bearing structure, try to utilize the existing structural load-bearing members as much as possible to avoid damage to the original structural load-bearing members, avoid unnecessary demolition or replacement, solve the vertical load-bearing problem and the horizontal seismic load-bearing problem, and meet the requirements of the current seismic code.

[0027] Embodiment 1

[0028] Referring to Figures 1 to 6 , this embodiment provides a reinforced concrete triangular roof truss load-bearing structure to improve the stability of the existing sawtooth-shaped roof with poor stability.

[0029] Referring to Figure 1 and Figure 2 , the sawtooth-shaped roof is supported by multiple T-shaped columns a, and the multiple T-shaped columns a are arranged in an array in the factory building, usually at equal intervals along the x-axis direction and at equal intervals along the y-axis direction on the bottom surface. Among them, in the coordinate system established on the horizontal plane, the x-axis is the transverse direction and the y-axis is the longitudinal direction. The triangular roof trusses 2 are sequentially connected in the y-axis direction to form a bay of triangular roof trusses. Figure 2It is a schematic diagram of a triangular roof truss in the y-axis direction, and multiple triangular roof trusses are arranged at equal intervals along the x-axis direction; the triangular roof truss 2 can be selected as an existing reinforced concrete load-bearing triangular roof truss. At this time, the triangular roof truss 2 includes a tail column connected to the T-shaped column a, a diagonal beam connected to the tail column, and a high-end vertical column connected to the diagonal beam. The tail column is located at the tail of the diagonal beam, the high-end vertical column is located at the top of the diagonal beam, the diagonal beam is inclined at an angle to the horizontal direction, the tail column and the high-end vertical column are both vertically arranged, and both the tail column and the high-end vertical column are connected to the adjacent T-shaped column a in the y-axis direction.

[0030] Multiple triangular roof trusses are distributed in a matrix. In the x-axis direction, adjacent two triangular roof trusses are usually connected by a window sill board arranged on the top of the triangular roof truss 2, and usually adjacent two triangular roof trusses 2 are arranged at equal intervals; in the y-axis direction, adjacent two triangular roof trusses 2 are connected end to end through the T-shaped column a to form a zigzag shape, that is, the triangular roof truss 2 is located on the top of two adjacent T-shaped columns a arranged along the y-axis. There are two opposite air duct girders b arranged on the top of the T-shaped column a. One air duct girder b on the same T-shaped column a is connected to the tail column of the triangular roof truss 2, and the other air duct girder b is connected to the high-end vertical column of another triangular roof truss 2, so that the triangular roof truss 2 is connected in sequence along the y-axis, and each triangular roof truss 2 is located between two adjacent T-shaped columns a in the y-axis direction; an air duct cover plate c and an air duct bottom plate are arranged between the two air duct girders b on the top of the same T-shaped column a to make the air duct airtight for convenient maintenance, and an upper gutter plate d is arranged on the top of the air duct cover plate c.

[0031] It should be further explained that in this embodiment, by adding a horizontal force-bearing rod 1 between two adjacent triangular roof trusses 2 in the x-axis direction, the horizontal force-bearing rod 1 is preferably arranged along the x-axis direction and connected to the diagonal beam of the triangular roof truss 2. Further preferably, the number and position of the horizontal force-bearing rods 1 between two adjacent triangular roof trusses 2 in the x-axis direction are the same; so that by adding the horizontal force-bearing rod 1, two adjacent triangular roof trusses 2 in the x-axis direction are rigidly connected, and all the triangular roof trusses 2 form an integral structure, increasing the stiffness and bearing capacity of the zigzag roof in the x-axis direction and the y-axis direction, realizing the spatial force system of the factory building roof in the transverse and longitudinal directions, significantly improving its seismic resistance and anti-collapse ability, and at the same time reducing the damage or change to the original structure, saving time and effort, saving costs, improving work efficiency, and meeting the use requirements.

[0032] Reference Figure 3, wherein, the horizontal stress bar 1 is arranged between the tops of the inclined beams of two adjacent triangular roof trusses 2 in the x-axis direction. The horizontal stress bar 1 can be selected from H-shaped steel, box-shaped square steel, channel steel, and I-shaped steel, and can be selected as I-shaped steel. Further, the horizontal stress bar 1 is also arranged between the tails of the inclined beams of two adjacent triangular roof trusses 2 in the x-axis direction. By arranging the horizontal stress bar 1 at both the top and the tail of the inclined beam of the triangular roof truss, the out-of-plane stability of the triangular roof truss 2 is ensured, the lateral stiffness of the triangular roof truss is enhanced, the integrity, ductility, and structural deformation capacity of the roof load-bearing structure system of the triangular roof truss 2 are improved, plastic deformation is reduced, and the phenomena of stress lag and strain lag are reduced. The construction is highly operable, the renovation cost is low, and the construction period is saved simply and quickly.

[0033] Reference Figures 4 to 6 , wherein, the horizontal stress bar 1 is connected to the triangular roof truss 2 through a connecting plate 3. The connecting plate 3 includes a first connecting plate 4. The first connecting plate 4 can be selected from rectangular, square, or circular steel plates. Since the end face of the triangular roof truss 2 is a rectangular structure, it can be selected as a rectangular plate structure. The first connecting plates 4 are respectively arranged on the opposite two end faces of the tail and the top of the inclined beam of the triangular roof truss 2. The two relatively arranged first connecting plates 4 are connected to the triangular roof truss 2 through screw rods 4a, so that the flanges at the ends of the horizontal stress bars 1 on both sides of the triangular roof truss 2 are respectively welded to the corresponding first connecting plates 4, and the webs at the ends of the horizontal stress bars 1 are respectively welded to the corresponding first connecting plates 4 through second connecting plates 5, realizing the rigid connection between the horizontal stress bar 1 and the triangular roof truss 2 through the first connecting plate 4. The number of the screw rods 4a is multiple, and the multiple screw rods 4a are arranged in an array on the first connecting plate 4, and the screw rods 4a are arranged perpendicular to the direction of the triangular roof truss 2, and the screw rods 4a are parallel to the horizontal stress bar 1.

[0034] Further, the connecting plate 3 also includes a second connecting plate 5. The second connecting plate 5 is made of steel plate. The second connecting plate 5 is arranged inside the web of the horizontal stress bar 1. The second connecting plate 5 is perpendicular to the first connecting plate 4 and is fixedly connected to the first connecting plate 4 by welding. The second connecting plate 5 can be arranged on one side or opposite sides of the web of the horizontal stress bar 1. Taking one side as an example, the second connecting plate 5 is connected to the horizontal stress bar 1 through high-strength bolts 5a, realizing the stable connection between the horizontal stress bar 1 and the triangular roof truss 2.

[0035] The number of the high-strength bolts 5a is multiple, and the multiple high-strength bolts 5a are arranged at equal intervals along the height direction of the second connecting plate 5. Each high-strength bolt 5a is arranged along the y-axis direction, that is, each high-strength bolt 5a is arranged perpendicular to the horizontal stress bar 1.

[0036] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A reinforced concrete triangular roof truss load-bearing structure, comprising a plurality of triangular roof trusses (2), characterized in that: In the x-axis direction, the triangular roof trusses (2) are connected to each other through horizontally arranged horizontal force-bearing rods (1); the horizontal force-bearing rods (1) are arranged on the inclined beams of the triangular roof trusses (2) and are perpendicular to the inclined beams of the triangular roof trusses (2).

2. The reinforced concrete triangular roof truss load-bearing structure according to claim 1 is characterized in that: The horizontal force-bearing rod (1) is connected to the top of the inclined beam of the triangular roof truss (2).

3. The reinforced concrete triangular roof truss load-bearing structure according to claim 1 or 2, characterized in that: The horizontal force-bearing rod (1) is also connected to the tail of the inclined beam of the triangular roof truss (2).

4. The reinforced concrete triangular roof truss load-bearing structure according to claim 1 is characterized in that: The horizontal force-bearing rod (1) is connected to the triangular roof truss (2) via a connecting plate (3).

5. The reinforced concrete triangular roof truss load-bearing structure according to claim 4 is characterized in that: The connecting plate (3) comprises first connecting plates (4) arranged on two opposite sides of the triangular roof truss (2); the first connecting plates (4) on the two opposite sides are connected by screw rods (4a); and the horizontal force-bearing rod (1) is connected to the triangular roof truss (2) via the first connecting plate (4) on the same side.

6. The reinforced concrete triangular roof truss load-bearing structure according to claim 5, characterized in that: The connecting plate (3) further comprises a second connecting plate (5) arranged on the horizontal force-bearing rod (1); the second connecting plate (5) is connected to the horizontal force-bearing rod (1) via high-strength bolts (5a); and the second connecting plate (5) is welded to the corresponding first connecting plate (4).

7. The reinforced concrete triangular roof truss load-bearing structure according to claim 6, characterized in that: The number of the high-strength bolts (5a) is multiple, and the multiple high-strength bolts (5a) are arranged at equal intervals along the height direction of the second connecting plate (5).

8. The reinforced concrete triangular roof truss load-bearing structure according to claim 1, characterized in that: In the y-axis direction, two adjacent triangular roof trusses (2) are connected via a T-shaped column (a) to form a sawtooth shape, and the T-shaped column (a) is connected to the corresponding triangular roof truss (2) via a duct beam (b).

9. The reinforced concrete triangular roof truss load-bearing structure according to claim 8, characterized in that: A horizontal force-bearing rod (1) connected to the tail of the inclined beam of the triangular roof truss (2) is arranged outside a connection node between the tail of the inclined beam and the gutter wallboard.

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