Bidirectional cable-rod system of steel roof based on photovoltaic transformation and reinforcement and its construction method

Abstract

The present invention relates to a bidirectional cable-strut system for a steel roof based on photovoltaic transformation and reinforcement and a construction method thereof, which belongs to the technical field of building steel structure, and comprises a plurality of steel columns distributed in a rectangular array, a roof steel beam is arranged between the upper ends of the left and right adjacent steel columns, a plurality of struts are arranged at the lower ends of the roof steel beams, a strut end cable clamp bidirectional connector is arranged at the lower ends of the struts, a steel beam upper flange cable clamp node corresponding to the struts is arranged at the upper ends of the roof steel beams, an out-of-plane cable is arranged between the strut end cable clamp bidirectional connector and the front and rear adjacent steel beam upper flange cable clamp nodes, and an in-plane cable is arranged between the strut end cable clamp bidirectional connector and the roof steel beam. The original structure is transformed into a tension beam structure system by struts and bidirectional prestressed cables, so as to improve the strength, rigidity and stability of the original roof, reduce the difficulty of reinforcement technology, and save construction cost.

Description

Technical Field

[0001] The present invention relates to the technical field of building steel structures, and in particular to a steel roof bidirectional cable rod system based on photovoltaic transformation and reinforcement and a construction method thereof. Background Art

[0002] In the field of building structures, steel roof structures are widely used in large-span concrete structures and industrial plants. With the rapid development of the country's photovoltaic industry, more and more industrial enterprises are installing photovoltaic power generation systems on existing buildings. After adding photovoltaic panels to the steel roof, the in-plane stress, deflection and out-of-plane stress of the original steel beams often do not meet the requirements, and the force on some steel nodes will also exceed the limit, requiring reinforcement of the original roof. The traditional reinforcement method of increasing the cross-section of the steel beam by welding steel plates is difficult to reinforce the nodes, the construction technology is complex, the labor cost is high, and the amount of steel used is large. Summary of the invention

[0003] The present invention mainly solves the deficiencies in the prior art and provides a bidirectional cable-strut system for a steel roof based on photovoltaic transformation and reinforcement and a construction method thereof. The original structure is transformed into a tensioned beam structure system through struts and bidirectional prestressed cables, thereby improving the strength, rigidity and stability of the original roof, reducing the difficulty of reinforcement technology, and saving construction costs.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] A bidirectional cable-strut system for a steel roof reinforced based on photovoltaic transformation comprises a plurality of steel columns distributed in a rectangular array, a roof steel beam is arranged between the upper ends of the left and right adjacent steel columns, a plurality of struts are arranged at the lower ends of the roof steel beams, a strut end cable clamp bidirectional connector is arranged at the lower ends of the struts, a steel beam upper flange cable clamp node corresponding to the struts is arranged at the upper ends of the roof steel beams, an out-of-plane cable is arranged between the strut end cable clamp bidirectional connector and the front and rear adjacent steel beam upper flange cable clamp nodes, and an in-plane cable is arranged between the strut end cable clamp bidirectional connector and the roof steel beam.

[0006] Preferably, the bidirectional connecting piece of the cable clamp at the end of the strut is provided with transverse channels and longitudinal channels staggered up and down, the transverse channels are used for passing out-of-plane cables, and the longitudinal channels are used for passing in-plane cables; the lower end of the strut is welded and fixed to the bidirectional connecting piece of the cable clamp at the end of the strut.

[0007] Preferably, a steel beam lower flange support node for pre-tightening the in-plane cable is provided between the in-plane cable and the roof steel beam, and the steel beam lower flange support node and the roof steel beam are welded and fixed via a support connecting plate, and the steel beam lower flange support node is welded to the steel beam at 1 / 3L from the end via the support connecting plate, where L is 1 / 2 of the roof span.

[0008] Preferably, ventilation holes are provided on both sides of the lower flange support node of the steel beam, penetrating the lower flange support node of the steel beam and located on both sides of the in-plane cable.

[0009] Preferably, the steel beam upper flange cable clamp node and the brace are welded to the roof steel beam at a position 1 / 3L away from the ridge, where L is 1 / 2 of the roof span.

[0010] Preferably, the steel beam upper flange cable clamp node is an ear plate seat structure.

[0011] A construction method for a bidirectional cable-rod system of a steel roof based on photovoltaic transformation and reinforcement comprises the following steps:

[0012] Step 1: Weld the bidirectional connector of the cable clamp at the end of the support pole to the lower end of the support pole in the factory, center it, and adjust the position of the horizontal and longitudinal channels during welding.

[0013] Step 2: Weld the bidirectional connectors of the brace end cable clamps and the brace to the lower flange of the roof steel beam at 1 / 3L away from the ridge on site, where L is 1 / 2 of the roof span.

[0014] Step 3: Weld the cable clamp node on the upper flange of the steel beam to the roof steel beam on site as the cable clamp node between the out-of-plane cable and the roof steel beam. The welding position is 1 / 3L from the ridge, where L is 1 / 2 of the roof span.

[0015] Step 4: Weld the support connecting plate to the lower flange of the roof steel beam at 1 / 3L from the end on site, where L is 1 / 2 of the roof span. Weld the support node of the lower flange of the steel beam to the support connecting plate. During the welding process, adjust the hole position for the pre-tightening cable in the plane.

[0016] Step 5: Pass the in-plane cables through the longitudinal holes on the bidirectional connectors of the cable clamps at the ends of the struts in sequence, and pre-tighten them at the nodes of the lower flange supports of the steel beam. The pre-tightening force is 10% of the designed prestress.

[0017] Step 6: Pass the out-of-plane cables through the holes on the cable clamp nodes on the upper flange of the steel beam and the transverse holes on the bidirectional connectors of the cable clamps at the ends of the struts in sequence, and pre-tighten them on the ground supports with a pre-tightening force of 10% of the designed prestress.

[0018] Step 7: Prestress the out-of-plane cables and in-plane cables in three stages. The first stage applies 80% of the design cable force, the second stage applies 105% of the design cable force, and the third stage is fine-tuned to the design cable tension according to the tension monitoring results.

[0019] Preferably, in-plane cables and struts are used to provide support for the roof steel beams to reduce their bending moments and weaken the impact of photovoltaic loads on the roof trusses. Out-of-plane cables provide out-of-plane support for the roof steel beams to improve the stability of the overall structure.

[0020] The present invention can achieve the following effects:

[0021] The present invention provides a bidirectional cable-strut system of a steel roof based on photovoltaic transformation and reinforcement and a construction method thereof. Compared with the prior art, the original structure is transformed into a tensioned beam structure system through struts and bidirectional prestressed cables, thereby improving the strength, rigidity and stability of the original roof, reducing the difficulty of reinforcement technology, and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the lower layer of the steel beam of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the steel beam lower flange support node of the present invention.

[0025] In the figure: steel column 1, roof steel beam 2, out-of-plane cable 3, strut 4, in-plane cable 5, steel beam upper flange cable clamp node 6, transverse channel 7, longitudinal channel 8, strut end cable clamp bidirectional connector 9, support connecting plate 10, steel beam lower flange support node 11, air vent 12. DETAILED DESCRIPTION

[0026] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0027] Example: Figure 1 , Figure 2 and Figure 3As shown, a bidirectional cable-strut system for a steel roof based on photovoltaic transformation and reinforcement comprises a plurality of steel columns 1 distributed in a rectangular array, a roof steel beam 2 is arranged between the upper ends of the adjacent steel columns 1 on the left and right, two struts 4 are arranged at the lower end of the roof steel beam 2, and a strut end cable clamp bidirectional connector 9 is arranged at the lower end of the strut 4, and the lower end of the strut 4 is welded and fixed to the strut end cable clamp bidirectional connector 9. The strut end cable clamp bidirectional connector 9 is provided with a transverse channel 7 and a longitudinal channel 8 staggered up and down, the transverse channel 7 is used for passing the out-of-plane cable 3, and the longitudinal channel 8 is used for passing the in-plane cable 5. The upper end of the roof steel beam 2 is provided with a steel beam upper flange cable clamp node 6 corresponding to the strut 4, and the steel beam upper flange cable clamp node 6 is an ear plate seat structure. The steel beam upper flange cable clamp node 6 and the strut 4 are welded at the roof steel beam 2 1 / 3L away from the roof ridge, and L is 1 / 2 of the roof span. An out-of-plane cable 3 is provided between the two-way cable clamp connection piece 9 at the end of the strut and the upper flange cable clamp node 6 adjacent to the front and rear, and an in-plane cable 5 is provided between the two-way cable clamp connection piece 9 at the end of the strut and the roof steel beam 2. A steel beam lower flange support node 11 for pre-tightening the in-plane cable 5 is provided between the in-plane cable 5 and the roof steel beam 2. The steel beam lower flange support node 11 and the roof steel beam 2 are welded and fixed through a support connection plate 10. The steel beam lower flange support node 11 is welded to the steel beam at 1 / 3L from the end through the support connection plate 10, and L is 1 / 2 of the roof span. Ventilation holes 12 are provided on both sides of the steel beam lower flange support node 11, which penetrate the steel beam lower flange support node 11 and are located on both sides of the in-plane cable 5.

[0028] A construction method for a bidirectional cable-rod system of a steel roof based on photovoltaic transformation and reinforcement comprises the following steps:

[0029] The first step: weld the bidirectional connector 9 of the cable clamp at the end of the strut to the lower end of the strut 4 in the factory, centering it, and adjust the positions of the transverse channel 7 and the longitudinal channel 8 during welding.

[0030] Step 2: On site, weld the brace end cable clamp bidirectional connector 9 and the brace 4 to the lower flange of the roof steel beam 2 at a distance of 1 / 3L from the roof ridge, where L is 1 / 2 of the roof span.

[0031] Step 3: Weld the steel beam upper flange cable clamp node 6 to the roof steel beam 2 on site as the cable clamp node between the out-of-plane cable 3 and the roof steel beam 2. The welding position is 1 / 3L away from the ridge, where L is 1 / 2 of the roof span.

[0032] Step 4: Weld the support connecting plate 10 to the lower flange steel beam of the roof steel beam 2 at 1 / 3L from the end on site, where L is 1 / 2 of the roof span, and weld the lower flange support node 11 of the steel beam to the support connecting plate 10. During the welding process, the hole position for the pre-tightening in-plane cable 5 needs to be adjusted.

[0033] Step 5: Pass the in-plane cables 5 through the longitudinal holes 8 on the bidirectional connectors 9 of the cable clamps at the ends of the struts in sequence, and pre-tighten them on the nodes 11 of the lower flange supports of the steel beams. The pre-tightening force is 10% of the designed prestress.

[0034] Step 6: Pass the out-of-plane cable 3 through the hole on the cable clamp node 6 of the upper flange of the steel beam and the transverse hole 7 on the bidirectional connector 9 of the cable clamp at the end of the strut in sequence, and pre-tighten it on the ground support with a pre-tightening force of 10% of the designed prestress.

[0035] Step 7: Prestress is applied to the out-of-plane cables 3 and the in-plane cables 5 in three stages. The first stage applies 80% of the design cable force, the second stage applies 105% of the design cable force, and the third stage is finely adjusted to the design cable tension according to the tension monitoring results.

[0036] In-plane cables 5 and struts 4 are used to provide support for the roof steel beam 2, thereby reducing its bending moment and weakening the impact of the photovoltaic load on the roof truss. Out-of-plane cables 3 provide out-of-plane support for the roof steel beam 2, thereby improving the stability of the overall structure.

[0037] In summary, the bidirectional cable-strut system of the steel roof based on photovoltaic transformation and reinforcement and its construction method transform the original structure into a beam-string structure system through struts and bidirectional prestressed cables, thereby improving the strength, stiffness and stability of the original roof, reducing the difficulty of reinforcement technology, and saving construction costs.

[0038] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A construction method for a bidirectional cable-rod system of a steel roof based on photovoltaic transformation and reinforcement, characterized in that: The photovoltaic-renovation-based steel roof bidirectional cable-strut system comprises a plurality of steel columns (1) distributed in a rectangular array, a roof steel beam (2) is provided between the upper ends of the adjacent steel columns (1), a plurality of struts (4) are provided at the lower ends of the roof steel beams (2), a strut end cable clamp bidirectional connector (9) is provided at the lower ends of the struts (4), a steel beam upper flange cable clamp node (6) corresponding to the struts (4) is provided at the upper ends of the roof steel beams (2), an out-of-plane cable (3) is provided between the strut end cable clamp bidirectional connector (9) and the front and rear adjacent steel beam upper flange cable clamp nodes (6), and an in-plane cable (5) is provided between the strut end cable clamp bidirectional connector (9) and the roof steel beam (2); the steel beam upper flange cable clamp node (6) and the struts (4) are welded to the roof steel beam (2) at a distance of 1 / 3L from the roof ridge, where L is 1 / 2 of the roof span; The strut end cable clamp bidirectional connector (9) is provided with a transverse hole (7) and a longitudinal hole (8) staggered up and down, the transverse hole (7) is used for passing the out-of-plane cable (3), and the longitudinal hole (8) is used for passing the in-plane cable (5); the lower end of the strut (4) is welded and fixed to the strut end cable clamp bidirectional connector (9); A steel beam lower flange support node (11) for pre-tightening the in-plane cable (5) is provided between the in-plane cable (5) and the roof steel beam (2); the steel beam lower flange support node (11) and the roof steel beam (2) are welded and fixed via a support connection plate (10); the steel beam lower flange support node (11) is welded to the steel beam at a distance of 1 / 3L from the end thereof via the support connection plate (10), where L is 1 / 2 of the roof span; The construction method of the bidirectional cable-rod system of the steel roof includes the following steps: Step 1: Weld the two-way connector (9) of the cable clamp at the end of the support rod to the lower end of the support rod (4) in the factory, centered, and adjust the positions of the transverse hole (7) and the longitudinal hole (8) during welding; Step 2: On site, the brace end cable clamp bidirectional connector (9) and the brace (4) are welded to the lower flange of the roof steel beam (2) at a distance of 1 / 3L from the roof ridge, where L is 1 / 2 of the roof span; Step 3: welding the steel beam upper flange cable clamp node (6) to the roof steel beam (2) on site to serve as the cable clamp node between the out-of-plane cable (3) and the roof steel beam (2), with the welding position being 1 / 3L from the roof ridge, where L is 1 / 2 of the roof span; Step 4: Weld the support connection plate (10) to the lower flange steel beam of the roof steel beam (2) at a distance of 1 / 3L from the end thereof on site, where L is 1 / 2 of the roof span, and weld the lower flange support node (11) of the steel beam to the support connection plate (10). During the welding process, the hole position for pre-tightening the in-plane cable (5) needs to be adjusted; Step 5: Pass the in-plane cables (5) through the longitudinal holes (8) on the bidirectional connectors (9) of the cable clamps at the ends of the struts in sequence, and pre-tighten them at the nodes (11) of the lower flange supports of the steel beams, with the pre-tightening force being 10% of the designed prestress; Step 6: Pass the out-of-plane cable (3) through the hole on the cable clamp node (6) on the upper flange of the steel beam and the transverse hole (7) on the bidirectional cable clamp connector (9) at the end of the strut, and pre-tighten it on the ground support, with the pre-tightening force being 10% of the designed prestress; Step 7: Prestressing is applied to the out-of-plane cables (3) and the in-plane cables (5) in three stages. The first stage applies 80% of the design cable force, the second stage applies 105% of the design cable force, and the third stage is finely adjusted to the design cable tension force according to the tension monitoring results.

2. The construction method of the bidirectional cable-rod system of the steel roof based on photovoltaic transformation and reinforcement according to claim 1 is characterized by: Air holes (12) are provided on both sides of the steel beam lower flange support node (11), penetrating the steel beam lower flange support node (11) and located on both sides of the in-plane cable (5).

3. The construction method of the bidirectional cable-rod system of the steel roof based on photovoltaic transformation and reinforcement according to claim 1 is characterized by: The steel beam upper flange cable clamp node (6) is an ear plate seat structure.

4. The construction method of the bidirectional cable-rod system of the steel roof based on photovoltaic transformation and reinforcement according to claim 1 is characterized in that: In-plane cables (5) and struts (4) are used to provide support for the roof steel beam (2), thereby reducing its bending moment and weakening the influence of the photovoltaic load on the roof truss. Out-of-plane cables (3) provide out-of-plane support for the roof steel beam (2), thereby improving the stability of the overall structure.

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