Steel structure large-span brim and photovoltaic system integrated decoration structure and construction method thereof

Abstract

This invention provides an integrated decorative structure and construction method for a large-span steel roof with a photovoltaic system. The structure includes a back frame, a horizontal top frame, and a sloping frame extending from the main building structure. The decorative system is supported by a unified decorative steel keel, including photovoltaic keels in the top frame and curtain wall keels in the back frame and at their junctions. Both share keels in key areas to form an integrated load-bearing system. A dedicated joint structure achieves a smooth transition and sealing at the junction of the photovoltaic panels and the curtain wall panels. During construction, BIM and finite element analysis are used for structural optimization; adjustable adapter components are used to install the integrated steel keel for precision adjustment; and the panels are installed sequentially and the joints are treated. This invention achieves a high degree of integration between architectural form and photovoltaic power generation function, improving space utilization efficiency and structural safety, and has significant energy-saving and economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of steel structures, specifically the integrated decorative structure of a large-span steel structure with a photovoltaic system and its construction method. Background Technology

[0002] In architectural design, to reflect the project's design concept and functional requirements, large-span cantilevered eaves and other structures are often incorporated into the roof to highlight the building's character and achieve symbolic meaning in its form. These eaves serve as visual focal points; to maintain the overall visual effect of the roof and avoid jarring, they are typically integrated into the main structure using only a curtain wall system, without any additional functional designs, ensuring aesthetic harmony. Meanwhile, photovoltaic (PV) power generation systems have become an important design element in the architectural field, but they are usually arranged in a collaborative design manner on the roof plan. The large-span cantilevered eave itself is a structural element emphasizing form, requiring strict control of stress and deflection during the design phase. Further integrating a PV system on top necessitates a separate support structure, introducing additional self-weight, wind loads, and snow loads, necessitating a re-evaluation of structural safety and reinforcement design, significantly increasing difficulty and cost. This also raises the question of how to integrate it with existing decorative curtain walls; existing PV system integration schemes often fail to achieve organic integration with the building's "fifth facade," the roof's form, easily resulting in a disconnect between function and form. Therefore, despite their considerable projected area, these large-span cantilevered brims have never been developed into energy production space.

[0003] In summary, the following three technical issues arise: I. Technical problem that the projected area of ​​existing large-span cantilevered eaves structures in buildings cannot be effectively converted into energy production space; II. Technical issues related to increased load and structural safety resulting from integrating photovoltaic systems on the brim; III. Technical issues related to integrating photovoltaic systems into the brim and combining them with the existing curtain wall structure. Summary of the Invention

[0004] The purpose of this invention is to provide a decorative structure integrating a large-span steel eave with a photovoltaic system and its construction method. It aims to solve the technical problem that the projected area of ​​the existing large-span cantilever eave structure cannot be effectively converted into energy production space; to solve the technical problems of increased load and structural safety caused by integrating a photovoltaic system on the eave; and to solve the technical problem of how to integrate the photovoltaic system on the eave with the existing curtain wall structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A steel structure with a large span and integrated photovoltaic system decorative structure includes a roof eaves frame structure. The eaves frame structure includes a main frame structure in the non-cantilevered area and an eaves structure in the cantilevered area. The main frame structure is located on the top of the main building structure. The main frame structure includes frame columns and frame beams set between the tops of the frame columns. The edge frame columns and edge frame beams on all four sides form an edge frame structure. The eaves structure cantilevers outward relative to the edge frame structure. The two are fixedly connected to form a triangular truss. The triangular truss includes a back frame formed by the edge frame structure, a top frame with a horizontal projection, and a diagonal frame set between the back frame and the top frame. It also includes a decorative system integrating a photovoltaic system and a curtain wall system. The decorative system includes decorative steel keel and decorative panels. The decorative steel keel is spaced apart and fitted onto the outside of the triangular truss. It includes photovoltaic keel and curtain wall keel. The photovoltaic keel is set on the top surface of the top frame and the curtain wall keel is set on the inside of the back frame. It is also set at the junction of the top frame and the diagonal frame and the top frame and the back frame. The photovoltaic keel and the curtain wall keel have a shared keel at the junction above the top frame. The decorative panels include photovoltaic panels and curtain wall panels. The photovoltaic panels are set on the top surface of the photovoltaic keel and the curtain wall panels are set on the surface of the curtain wall keel. The photovoltaic panels and the curtain wall panels are flush at the junction and have a joint structure.

[0006] The top frame includes edge frame beams, cantilever beams, edge sealing beams, and inter-beam diagonal bracing. The diagonal frame consists of beam-column diagonal bracing. The cantilever beams and beam-column diagonal bracing are all set corresponding to the edge frame columns. The inner end of the cantilever beam is fixedly connected to the top of the corresponding edge frame column. The two ends of the beam-column diagonal bracing are fixedly connected to the bottom of the outer end of the corresponding cantilever beam and the middle of the edge frame column, respectively. The two ends of the edge sealing beam are fixedly connected to the inner side of the outer end of the adjacent cantilever beam, respectively. The two ends of the inter-beam diagonal bracing are fixedly connected diagonally to the diagonal position of the top frame.

[0007] The photovoltaic keel includes photovoltaic keel columns, photovoltaic main keels, and photovoltaic secondary keels. The photovoltaic keel columns are arranged in two rows on the inside and outside, and are connected to the top surfaces of the edge sealing beam and the edge frame beam respectively through the transition components. The two photovoltaic keel columns on the inside and outside respectively form photovoltaic support column groups. The inner and outer ends of each photovoltaic main keel are supported and connected by the corresponding photovoltaic support column groups. The photovoltaic secondary keels are arranged at intervals between adjacent photovoltaic main keels and are fixedly connected to them. The outermost and innermost photovoltaic secondary keels are the outer edge secondary keel and the inner edge secondary keel, respectively. The top surface of the photovoltaic keel column is fixedly connected to the bottom surface of the photovoltaic main keel.

[0008] The curtain wall keel includes a back frame keel section set on the outside of the back frame, an outer end keel section set at the junction of the top frame and the diagonal frame, and an inner end keel section set at the junction of the top frame and the back frame. The outer end keel section and the inner end keel section are fixedly connected as one unit by a tie keel section set below the diagonal frame.

[0009] The tie-joint keel section includes tie-joint keel columns, tie-joint main keels, and tie-joint secondary keels. The top of the tie-joint keel column is connected to the inner side of the edge sealing beam through a transition component. The bottom of the tie-joint keel column is fixedly connected to the top of the tie-joint main keel. The bottom of the tie-joint main keel is fixedly connected to the outer side of the main building structure. The tie-joint secondary keels are spaced apart between adjacent tie-joint main keels and fixedly connected to them. The back frame keel section includes the back frame main keel and the back frame secondary keel. The top of the back frame main keel is connected to the inner side of the edge frame beam through a transition component, and the bottom of the back frame main keel is connected to the inner side of the main building structure through a transition component. The back frame secondary keels are spaced apart between adjacent back frame main keels and are fixedly connected to them. The topmost back frame secondary keel is the top edge secondary keel. The outer end keel section includes the outer end main keel and the outer end secondary keel. The top inner end of the outer end main keel is provided with a connecting angle steel. The vertical limb of the connecting angle steel is fixedly connected to the outer side of the outer end adjacent secondary keel. The bottom of the outer end main keel is fixedly connected to the top of the tie main keel. The bottom end of the outer end main keel is fixedly connected to the bottom of the tie keel column. The top of the outer end secondary keel is shared by the outer end adjacent secondary keel. The inner end keel section includes the inner end main keel and the inner end secondary keel. The inner end main keel is composed of the inner end of the photovoltaic main keel and the top end of the back frame main keel. The inner end secondary keel is composed of the inner end edge secondary keel and the top end edge secondary keel.

[0010] The adapter assembly includes channel steel back ribs clamped on both sides of the main component, and an adapter connecting plate fixedly connected to the bottom ends of the channel steel back ribs. The adapter connecting plate is fixedly connected to the connecting component. The web of the channel steel back ribs has an adjusting elongated hole adapted to the connection direction. The main component has a corresponding connecting hole that matches the adjusting elongated hole. A pad is fixedly connected to the outer surface of the web. The pad has a pad hole, which is either a round hole or an elongated hole perpendicular to the adjusting elongated hole. The connecting bolts pass through the pad holes on both sides, the adjusting elongated holes, and the connecting holes to pull the channel steel back ribs on both sides, and adjust the distance between the main component and the connecting component. The main component includes photovoltaic keel columns, tie keel columns, and back frame main keel. The connecting component is the corresponding edge sealing beam, edge frame beam, or building main structure. When the connecting component is a rectangular steel pipe, the transition connecting plate is directly connected to the connecting component. When the connecting component is a round steel pipe, the transition connecting plate is connected to the connecting component through vertical connecting legs to adapt to the arc surface.

[0011] The outer end of the photovoltaic panel is fixedly connected to the outer edge secondary keel and connecting angle steel, and the inner end of the photovoltaic panel is fixedly connected to the inner edge secondary keel.

[0012] The curtain wall panels correspond to the back frame keel section, the outer end keel section, and the inner end keel section, respectively. Each panel is fixedly connected to the main keel of each keel section through curtain wall connectors. The unit separation of each curtain wall panel corresponds to the position of the secondary keel of each keel section. The inner end of the outer end panel is fixedly connected to the horizontal leg of the connecting angle steel, the outer end of the inner end panel is fixedly connected to the inner edge secondary keel, and the inner end of the inner end panel is fixedly connected to the top edge secondary keel.

[0013] The joint structure is located between the outer end panel and the photovoltaic panel, including a half-frame on the bottom side of the photovoltaic panel's end. This half-frame overlaps the outer end secondary keel and the connecting angle steel, and is anchored to the horizontal leg of the connecting angle steel by a first screw. An L-shaped connector is located at the end of the outer end panel, and the bottom of the L-shaped connector is anchored to the horizontal leg of the connecting angle steel by a second screw. The first and second screws are alternately installed on the horizontal leg. Sealant is used to fill the space between the outer end panel and the photovoltaic panel. The joint structure is also set between the inner end panel and the photovoltaic panel, including a half-frame on the bottom side of the end of the photovoltaic panel, a frame pressing block on the half-frame, the frame pressing block being anchored to the inner end edge secondary keel by a first screw, an L-shaped connector at the end of the inner end panel, the bottom of the L-shaped connector being anchored to the inner end edge secondary keel by a second screw, the first screw and the second screw being alternately set on the inner end edge secondary keel, and sealant being filled between the inner end panel and the photovoltaic panel.

[0014] A construction method for an integrated decorative structure combining a large-span steel structure with a photovoltaic system, comprising the following steps: Step 1, Pre-construction preparation: Apply BIM modeling and perform finite element numerical simulation analysis to analyze the stress and strain of the brim structure. During the analysis, consider the influence of the self-weight of the newly added photovoltaic system on the stress and strain of the brim structure, improve the component specifications of the brim frame structure in situ, and remove the frame diagonal bracing of the adjacent frame structure. Step 2, Construction Preparation and Surveying: Survey and set out the top of the main building structure to locate the control points of the main frame structure and the eaves structure; Step 3, Construction of the main frame structure: Install the frame columns on top of the main building structure, and install the frame beams between the top of the frame columns to form the main frame structure. The edge frame columns and edge frame beams form the edge frame structure, which serves as the back frame of the triangular truss. Step 4, Construction of the cap structure: The cantilever beam and the beam-column brace form the first herringbone installation unit. The inner end of the cantilever beam is fixed to the top of the adjacent frame column, and the outer end extends outward. The inner end of the beam-column brace is fixed to the middle of the adjacent frame column, with the beam-column brace serving as a diagonal frame. The edge-sealing beam and the beam-interval brace form the second herringbone installation unit, connecting the edge-sealing beam to the inner side of the outer end of the adjacent cantilever beam. The beam-interval brace is connected to the diagonal position of the top frame. Complete the beam-column brace and the edge-sealing beam and beam-interval brace at the junction of the horizontal and vertical cap structure. Step 5: Construction and decoration of steel keel: Photovoltaic keel installation: Fix the adapter component to the top surface of the edge sealing beam and the edge frame beam. Weld photovoltaic keel columns to the bottom of the main photovoltaic keel corresponding to the position of the adapter component. Insert the photovoltaic keel columns into the adjusting adapter component and adjust the installation elevation of the main photovoltaic keel by connecting bolts. Install photovoltaic secondary keels between adjacent main photovoltaic keels. The outermost and innermost photovoltaic secondary keels are the outer edge secondary keel and the inner edge secondary keel, respectively. Curtain wall keel installation: Tie-joint keel section: The tie-joint keel column and the tie-joint main keel form a third herringbone installation unit. The transition component is fixed to the inner side of the edge sealing beam. The tie-joint keel column is inserted into the adjustment transition component and the horizontal installation position of the tie-joint main keel is adjusted by the connecting bolts. The bottom end of the tie-joint main keel is fixedly connected to the outer side of the main building structure. Tie-joint secondary keels are installed between adjacent tie-joint main keels. Back frame keel section: The transition component is fixed to the edge frame beam and the inner side of the main building structure. The back frame main keel is inserted into the adjustment transition component and the horizontal installation position of the back frame main keel is adjusted by connecting bolts. The back frame secondary keel is installed between adjacent back frame main keels, and its topmost part is the top edge secondary keel. Outer end keel section: Connect the outer end main keels sequentially, and fix the top of the main keel to the outer side of the outer end adjacent secondary keel through the vertical limb of the pre-set connecting angle steel. Fix the bottom of the outer end main keel to the top of the tie main keel. Install the outer end secondary keel between adjacent outer end main keels. Inner end keel section: The inner end main keel consists of the inner end of the photovoltaic main keel and the top end of the back frame main keel. The inner end secondary keel consists of the inner end edge secondary keel and the top edge secondary keel. At this time, all of them have been completed. Step Six: Install the decorative panels: Photovoltaic panel installation: The monocrystalline silicon photovoltaic module is fixed as a photovoltaic panel on the main photovoltaic keel and the secondary photovoltaic keel. The outer end and the inner end of the panel are respectively connected to the outer edge secondary keel and the inner edge secondary keel. Curtain wall panel installation: The back frame panel, outer end panel and inner end panel are fixed to the corresponding keel segments of the back frame main keel, outer end main keel and inner end main keel through curtain wall connectors; the inner end of the outer end panel is fixedly connected to the horizontal leg of the connecting angle steel, the outer end of the inner end panel is fixedly connected to the inner edge secondary keel, and the inner end of the inner end panel is fixedly connected to the top edge secondary keel. Construction joint structure: The junction between the photovoltaic panel and the curtain wall panel is sealed; Step 7: Adjustment, Testing and Acceptance: Use a total station to check the flatness, slope and joint sealing of the transition between the photovoltaic panel and the curtain wall panel, and then conduct a photovoltaic system power generation test.

[0015] Compared with the prior art, the present invention has the following features and beneficial effects: I. This invention achieves efficient conversion of energy production space by integrating a photovoltaic power generation system with the decorative enclosure function of a large-span cantilevered eave. By directly using the photovoltaic panels of monocrystalline silicon photovoltaic modules as the decorative panels on the top of the eave, replacing some traditional non-functional decorative materials such as aluminum plates, the projected area of ​​the cantilever structure itself is directly utilized. This transforms the eave from a visual decorative building component into a composite building component that generates energy. The top surface of the eave, which originally only had a design function, is transformed into a functional surface that actively generates electricity. This expands the application scenarios of renewable energy in buildings, improves the comprehensive utilization efficiency of space, and solves the technical problem that the projected area of ​​existing large-span cantilevered eave structures cannot be effectively converted into energy production space.

[0016] II. This invention does not directly superimpose independent photovoltaic (PV) brackets onto the existing brim. Instead, it controls the load and optimizes the force transmission path through an integrated design. Using BIM modeling and finite element analysis, the impact of the integrated system on the brim frame structure is pre-assessed and quantified. Without increasing the original load-bearing components, the specifications of the load-bearing components are improved in situ. Simultaneously, a decorative steel keel system is added to cooperate with the triangular truss main structure in bearing the load. The load generated by the PV system is transferred to the triangular truss through the optimized keel system and then to the main building structure. This integrated design avoids the additional bending moments and concentrated loads caused by independent PV brackets in traditional solutions. The transition components allow for adjustments during construction, ensuring a tight and reliable connection between the decorative system and the main structure, guaranteeing the stability of the brim and the overall structural safety. This solves the technical problems of increased load and structural safety caused by integrating a PV system onto the brim.

[0017] Third, through structural design, this invention achieves seamless integration of the photovoltaic system with the building curtain wall in terms of both visual appeal and function. A decorative steel keel, adapted to the triangular truss of the eaves, serves as a unified supporting framework. This spatially encloses the photovoltaic area (top frame) with the curtain wall area's back frame and the keels at the front and rear ends, using a shared keel to achieve mechanical transfer and eliminate visual structural breaks. The photovoltaic panels and various curtain wall panels are flush-jointed at their junctions via a joint structure, establishing a unified photovoltaic curtain wall decoration system. The keel system serves as both the supporting framework for the photovoltaic panels and the installation foundation for the curtain wall panels, eliminating any sense of superfluity at the structural level. This makes the photovoltaic system an integral part of the building's "fifth facade," maintaining the building's original shape and visual harmony, and solving the technical problem of integrating a photovoltaic system on the eaves with the existing curtain wall structure. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 yes Figure 1 A schematic diagram of the brim frame structure.

[0021] Figure 3 yes Figure 1 Medium local magnification Figure 1 .

[0022] Figure 4 yes Figure 1 Medium local magnification Figure 2 .

[0023] Figure 5 This is a schematic diagram of the planar structure of the present invention.

[0024] Figure 6 yes Figure 5 A magnified view of a portion of the image.

[0025] Figure 7 yes Figure 6 Schematic diagram of the middle AA section, i.e., the short axial section.

[0026] Figure 8 yes Figure 6 Schematic diagram of the BB section, i.e., the long-axis section.

[0027] Figure 9 yes Figure 7 A magnified view of the brim structure at position C.

[0028] Figure 10 yes Figure 9 A magnified view of the outer end of the keel segment at position F.

[0029] Figure 11 yes Figure 9 Enlarged schematic diagram of the connection between the top of the photovoltaic keel and the top frame at position G.

[0030] Figure 12 yes Figure 9 Enlarged partial view of the connection between the top of the inner end keel section at position H and the top frame of the back frame keel section.

[0031] Figure 13 yes Figure 9 Enlarged partial diagram showing the connection between the bottom end of the middle K-position tie rod, the bottom of the back frame keel section, and the main building structure.

[0032] Figure 14 yes Figure 10 A partially enlarged schematic diagram of the joint structure between the photovoltaic panel at position M and the outer curtain wall panel.

[0033] Figure 15 yes Figure 12 A partially enlarged schematic diagram of the joint structure between the photovoltaic panel at position N and the inner curtain wall panel.

[0034] Figure 16 yes Figure 7 A partially enlarged schematic diagram of the brim structure at position D.

[0035] Figure 17 yes Figure 8 A partially enlarged schematic diagram of the brim structure at position E in the middle.

[0036] Figure 18 This is a standard connection diagram of photovoltaic panels and photovoltaic keel.

[0037] Figure 19 yes Figure 18 A side view structural diagram.

[0038] Figure 20 yes Figure 11 Enlarged view of the connection between the intermediate relay component and the main component when the photovoltaic keel column is used.

[0039] Figure 21 yes Figure 20 A side view of the intermediate transfer assembly.

[0040] Figure 22 yes Figure 20 A top view of the intermediate transfer component.

[0041] Figure 23 This is a schematic diagram of the construction frame column in step three of the construction method of the present invention.

[0042] Figure 24This is a schematic diagram of the construction frame beam in step three of the construction method of the present invention.

[0043] Figure 25 This is a schematic diagram of the diagonal bracing of the construction frame in step three of the construction method of the present invention.

[0044] Figure 26 This is a schematic diagram of the first herringbone installation unit in step four of the construction method of the present invention.

[0045] Figure 27 This is a schematic diagram of the second frame first herringbone installation unit in step four of the construction method of the present invention.

[0046] Figure 28 Is Figure 26 and Figure 27 A schematic diagram of the construction of the second herringbone installation unit between the first herringbone installation unit and the middle herringbone installation unit.

[0047] Figure 29 This is a schematic diagram of the construction of the long-axis brim structure starting from the middle in step four of the construction method of this invention.

[0048] Figure 30 This is a schematic diagram showing the completion of the entire brim structure construction in step four of the construction method of this invention.

[0049] Figure label: 1 - Main frame structure, 11 - Frame column, 12 - Frame beam, 13 - Edge frame column, 14 - Edge frame beam, 15 - Frame brace; 2 - Hat brim structure; 3 - Main building structure; 4 - Back frame; 5 - Top frame, 51 - Cantilever beam, 52 - Edge sealing beam, 53 - Inter-beam bracing; 6 - Slanted frame; 7 - Photovoltaic keel, 71 - Photovoltaic keel column, 72 - Photovoltaic main keel, 73 - Photovoltaic secondary keel, 731 - Outer edge secondary keel, 732 - Inner edge secondary keel; 8 - Curtain wall keel, 81 - Tie keel column, 82 - Tie main keel, 83 - Tie secondary keel, 84 - Back frame main keel, 85 - Back frame secondary keel, 851 - Top edge secondary keel, 86 - Outer main keel, 87 - Outer secondary keel; 9 - Photovoltaic panels; 10 - Curtain wall panel, 101 - Back frame panel, 102 - Outer end panel, 103 - Inner end panel; 20 - Joint structure; 30 - Transition component, 301 - Channel steel back rib, 302 - Transition connecting plate, 303 - Web, 304 - Adjusting oblong hole, 305 - Connecting hole, 306 - Padding plate, 307 - Padding plate hole, 308 - Connecting limb; 40 - Connecting angle steel, 401 - Vertical limb, 402 - Horizontal limb; 50 - Curtain wall connector, 60 - Connecting bolt, 70 - Half part sub-frame, 80 - First screw, 90 - L-shaped connector, 100 - Second screw, 200 - Sealant, 300 - Sub-frame pressing block, 400 - Conventional photovoltaic system, 500 - Drainage trough, 600 - Whole sub-frame. Specific implementation mode

[0050] Refer to the embodiment Figure 1-8 As shown, an integrated decorative structure of a large-span steel structure eaves and a photovoltaic system includes an eaves frame structure on the roof. The eaves frame structure includes a main frame structure 1 in the non-overhanging area and an eaves structure 2 in the overhanging area. The main frame structure 1 is arranged on the top of the building main structure 3.

[0051] In this embodiment, the building main structure 3 is a rectangular building, and a conventional photovoltaic system 400 is arranged on the main frame structure 1. The eaves structure 2 is a vertical and horizontal truss arranged around the main frame structure 1, presenting a rectangular shape as a whole, with a projected dimension of long axis × short axis = 143.6m × 23m, a truss height of 3.2m, a maximum overhanging length of 5.6m, and two temperature joints are arranged on the long side of the eaves structure 2.

[0052] The main frame structure 1 includes frame columns 11 and frame beams 12 arranged between the tops of the frame columns 11. The edge frame columns 13 and edge frame beams 14 on its four surrounding edges form an edge frame structure. The eaves structure 2 projects outward relative to the edge frame structure, and the two are fixedly connected to form a triangular truss. The triangular truss includes a back frame 4 formed by the edge frame structure, a top frame 5 with a horizontal projection, and an inclined frame 6 arranged between the back frame 4 and the top frame 5.

[0053] The top frame 5 includes an edge frame beam 14, a cantilever beam 51, a sealing beam 52, and an inter-beam diagonal brace 53. The inclined frame 6 is a beam-column diagonal brace. The cantilever beam 51 and the beam-column diagonal brace are both arranged corresponding to the edge frame columns 13. The inner end of the cantilever beam 51 is fixedly connected to the top of the corresponding edge frame column 13. The two ends of the beam-column diagonal brace are respectively fixedly connected to the outer end bottom of the corresponding cantilever beam 51 and the middle of the edge frame column 13. The two ends of the sealing beam 52 are fixedly connected between the inner sides of the outer ends of the adjacent cantilever beams 51. The two ends of the inter-beam diagonal brace are diagonally and fixedly connected to the diagonal positions of the top frame 5.

[0054] In this embodiment, both the main frame structure 1 and the cantilever beam 51 are made of box-section steel pipes with cross-sectional dimensions of 400mm×14mm, 350mm×12mm, or 400mm×300mm×12mm, and the material is Q355B. The beam-column bracing, the edge sealing beam 52, and the inter-beam bracing 53 are all made of circular cross-section steel pipes with cross-sectional dimensions of φ219mm×10mm, φ180mm×10mm, φ299mm×16mm, or φ203mm×8mm, and the material is Q355B.

[0055] See Figure 9-17 As shown, the steel structure with a large span and integrated photovoltaic system also includes a decorative system that integrates the photovoltaic system and the curtain wall system. This decorative system is not connected to the conventional photovoltaic system 400, and a drainage channel 500 is set between the two.

[0056] The decorative system includes decorative steel keel and decorative panels. The decorative steel keel is spaced apart and fitted onto the outside of the triangular truss, including photovoltaic keel 7 and curtain wall keel 8. Photovoltaic keel 7 is located on the top surface of the top frame 5, and curtain wall keel 8 is located on the inner side of the back frame 4, and also at the junctions of the top frame 5 and the diagonal frame 6, and the top frame 5 and the back frame 4. The photovoltaic keel 7 and the curtain wall keel 8 share a common keel at the junction above the top frame 5. The photovoltaic keel 7 includes photovoltaic keel columns 71, photovoltaic main keels 72, and photovoltaic secondary keels 73. The top surface of the photovoltaic keel columns 71 is fixedly connected to the bottom surface of the photovoltaic main keel 72. Two rows of photovoltaic keel columns 71 are arranged correspondingly inside and outside, and are connected to the top surfaces of the edge sealing beam 52 and the edge frame beam 14 respectively through the adapter component 30. The two photovoltaic keel columns 71 corresponding inside and outside form photovoltaic support column groups. The inner and outer ends of each photovoltaic main keel 72 are supported and connected by the corresponding photovoltaic support column groups. The photovoltaic secondary keels 73 are arranged at intervals between adjacent photovoltaic main keels 72 and are fixedly connected to them. The outermost and innermost photovoltaic secondary keels 73 are the outer edge secondary keel 731 and the inner edge secondary keel 732, respectively.

[0057] The curtain wall keel 8 includes a back frame keel section set on the outside of the back frame 4, an outer end keel section set at the junction of the top frame 5 and the diagonal frame 6, and an inner end keel section set at the junction of the top frame 5 and the back frame 4. The outer end keel section and the inner end keel section are fixedly connected as one unit by a tie keel section set below the diagonal frame 6.

[0058] The tie-joint keel section includes tie-joint keel columns 81, tie-joint main keels 82, and tie-joint secondary keels 83. The top of the tie-joint keel column 81 is connected to the inner side of the edge sealing beam 52 through a transition component 30. The bottom end of the tie-joint keel column 81 is fixedly connected to the top of the tie-joint main keel 82. The bottom end of the tie-joint main keel 82 is fixedly connected to the outer side of the main building structure 3. The tie-joint secondary keels 83 are spaced apart between adjacent tie-joint main keels 82 and fixedly connected to them.

[0059] The back frame keel section includes a back frame main keel 84 and a back frame secondary keel 85. The top of the back frame main keel 84 is connected to the inner side of the edge frame beam 14 through a transition component 30, and the bottom of the back frame main keel 84 is connected to the inner side of the main building structure 3 through a transition component 30. The back frame secondary keels 85 are spaced apart between adjacent back frame main keels 84 and are fixedly connected to them. The topmost back frame secondary keel 85 is the top edge secondary keel 851.

[0060] The outer end keel section includes an outer end main keel 86 and an outer end secondary keel 87. The top inner end of the outer end main keel 86 is provided with a connecting angle steel 40. The vertical limb 401 of the connecting angle steel is fixedly connected to the outer side of the outer end adjacent secondary keel 731. The bottom of the outer end main keel 86 is fixedly connected to the top of the tie main keel 82. The bottom end of the outer end main keel 86 is fixedly connected to the bottom of the tie keel column 81. The top end secondary keel 87 is shared by the outer end adjacent secondary keel 731.

[0061] The inner end keel section includes the inner end main keel and the inner end secondary keel. The inner end main keel is composed of the inner end of the photovoltaic main keel 72 and the top end of the back frame main keel 84. The inner end secondary keel is composed of the inner end edge secondary keel 732 and the top end edge secondary keel 851.

[0062] See Figure 9 , 11 As shown in -12, 16, 20-22, in this embodiment, the adapter component 30 includes channel steel back ribs 301 clamped on both sides of the main component, and an adapter connecting plate 302 fixedly connected to the bottom end of the channel steel back ribs 301. The adapter connecting plate 302 is fixedly connected to the connecting component. The web plate 303 of the channel steel back ribs 301 has an adjustment elongated hole 304 adapted to the connection direction. The main component has a connecting hole 305 that matches the adjustment elongated hole 304. A pad plate 306 is fixedly connected to the outer surface of the web plate 303. The pad plate 306 has a pad plate hole 307, which is a round hole or an elongated hole perpendicular to the adjustment elongated hole 304.

[0063] The connecting bolts 60 pass through the pad holes 307, adjusting elongated holes 303, and connecting holes 304 on both sides to connect the channel steel back ribs 301 on both sides and adjust the distance between the main component and the connecting component. The main component includes photovoltaic keel columns 71, tie keel columns 81, and back frame main keel 84. The connecting component is the corresponding edge sealing beam 52, edge frame beam 14, or building main structure 3. Specifically, when the connecting component is a box-section steel pipe of edge frame beam 14, the transition connecting plate 302 is directly welded to the connecting component. When the connecting component is the building main structure 3, it is generally connected to the exterior wall of the building and welded to the steel parts embedded in the wall. When the connecting component is a circular section steel pipe of edge sealing beam 52, the transition connecting plate 302 is connected to the connecting component through a vertical connecting leg 308 to adapt to the curved surface.

[0064] See Figure 9-19 As shown, the decorative panel includes a photovoltaic panel 9 and a curtain wall panel 10. The photovoltaic panel 9 is set on the top surface of the photovoltaic keel 7, and the curtain wall panel 10 is set on the surface of the curtain wall keel 8. The photovoltaic panel 9 and the curtain wall panel 10 are flush at the junction and a joint structure 20 is provided.

[0065] See Figure 18-19 As shown, the partition unit of the photovoltaic panel 9 is located at the junction of the main photovoltaic keel 72 and the secondary photovoltaic keel 73. The connection typically uses a single subframe 600 and a subframe clamping block 300, fixed to the photovoltaic keel 7 by a first screw 80. The panel connection is sealed with sealant 200. The outer end of the photovoltaic panel 9 is fixedly connected to the outer edge secondary keel 731 and the connecting angle steel 40, and the inner end of the photovoltaic panel 9 is fixedly connected to the inner edge secondary keel 732.

[0066] The curtain wall panel 10 corresponds to the back frame keel section, the outer end keel section and the inner end keel section as back frame panel 101, outer end panel 102 and inner end panel 103 respectively. Each panel is fixedly connected to the main keel of each keel section through the curtain wall connector 50. The unit separation of each curtain wall panel corresponds to the secondary keel position of each keel section.

[0067] The inner end of the outer end panel 102 is fixedly connected to the horizontal leg 402 of the connecting angle steel 40, the outer end of the inner end panel 103 is fixedly connected to the inner end adjacent secondary keel 732, and the inner end of the inner end panel 103 is fixedly connected to the top adjacent secondary keel 851.

[0068] The joint structure 20 is set between the outer end panel 102 and the photovoltaic panel 9, including a half-frame 70 provided on the bottom side of the end of the photovoltaic panel 9. The half-frame 70 overlaps the outer end edge secondary keel 731 and the connecting angle steel 40, and is anchored to the horizontal leg 402 of the connecting angle steel 40 by the first screw 80. An L-shaped connector 90 is provided at the end of the outer end panel 102. The bottom of the L-shaped connector 90 is anchored to the horizontal leg 402 of the connecting angle steel 40 by the second screw 100. The first screw 80 and the second screw 100 are alternately arranged on the horizontal leg 402. The space between the outer end panel 102 and the photovoltaic panel 9 is filled with sealant 200.

[0069] The joint structure 20 is also provided between the inner end panel 103 and the photovoltaic panel 9, including a half-frame 70 provided on the bottom side of the end of the photovoltaic panel 9, a frame pressing block 300 provided on the half-frame 70, the frame pressing block 300 being anchored to the inner end edge secondary keel 732 by a first screw 80, an L-shaped connector 90 provided at the end of the inner end panel 103, the bottom of the L-shaped connector 90 being anchored to the inner end edge secondary keel 732 by a second screw 100, the first screw 80 and the second screw 100 being alternately provided on the inner end edge secondary keel 732, and sealant 200 being filled between the inner end panel 103 and the photovoltaic panel 9.

[0070] The construction method for this integrated decorative structure combining a large-span steel brim with a photovoltaic system includes the following steps: Step 1, Pre-construction preparation: Apply BIM modeling and perform finite element numerical simulation analysis to analyze the stress and strain of the cap structure 2. During the analysis, consider the influence of the self-weight of the newly added photovoltaic system on the stress and strain of the cap structure 2. Calculate the additional area required to replace the new photovoltaic panels with conventional decorative aluminum panels, and improve the component specifications of the cap frame structure in situ. All materials are Q355B. The internal supports of the edge frame structure are removed to increase the construction space for the integrated decorative system of photovoltaic system and curtain wall system. At the shape of the main beam of the courthouse, cadmium telluride aluminum plate simulation components are used to replace the original aluminum composite panels, and photovoltaic power generation panels replace conventional roof aluminum panels.

[0071] In this embodiment, the main frame structure 1 is rectangular, divided into a long axis direction and a short axis direction. The frame diagonal bracing 15 is removed between the adjacent frame structures along the long axis, while the frame diagonal bracing 15 can be retained between the adjacent frame structures along the short axis.

[0072] Step 2, Construction Preparation and Surveying: Survey and survey the top of the main building structure 3 to locate the control points of the main frame structure 1 and the cap structure 2.

[0073] Step 3, see Figure 23-25As shown, the main frame structure 1 is constructed by installing frame columns 11 on top of the main building structure 3 and installing frame beams 12 between the top of the frame columns 11 to form the main frame structure 1. Frame bracing 15 is constructed between the main frame structures 1 as needed. The edge frame columns 13 and edge frame beams 14 form the edge frame structure, which serves as the back frame 4 of the triangular truss. During installation, construction starts from the middle and proceeds to both sides. All members are directly hoisted in place on the roof.

[0074] Step four, see Figure 26-30 As shown, in the construction of the cap structure 2: the cantilever beam 51 and the beam-column brace form the first herringbone installation unit. The inner end of the cantilever beam 51 is fixed to the top of the adjacent frame column 13, and the outer end extends outward. The inner end of the beam-column brace is fixed to the middle of the adjacent frame column 13, wherein the beam-column brace serves as the diagonal frame 6. The edge-sealing beam 52 and the beam-interval brace 53 form the second herringbone installation unit, connecting the edge-sealing beam 52 between the inner sides of the outer ends of adjacent cantilever beams 51. The beam-interval brace 53 is connected to the diagonal position of the top frame 5. The beam-column brace, edge-sealing beam 52 and beam-interval brace 53 between the cantilever beams 51 at the junction of the long and short axis bidirectional cap structure 2 are supplemented. During installation, construction begins from the middle of the long axis and proceeds outwards to both sides, followed by the short axis, and then the members between the long and short axes. All members are hoisted directly onto the roof in their original locations.

[0075] Step 5: Construction and decoration of steel keel: Photovoltaic keel 7 installation: Fix the adapter component 30 to the top surface of the edge sealing beam 52 and the edge frame beam 14. Weld the photovoltaic keel column 71 at the bottom of the photovoltaic main keel 72 corresponding to the position of the adapter component 30. Insert the photovoltaic keel column 71 into the adjustment adapter component 30 and adjust the installation elevation of the photovoltaic main keel 72 by connecting bolts 60. Install photovoltaic secondary keels 73 between adjacent photovoltaic main keels 72. The outermost and innermost photovoltaic secondary keels 73 are the outer edge secondary keel 731 and the inner edge secondary keel 732, respectively.

[0076] Installation of curtain wall keel 8: Tie-joint keel section: Tie-joint keel column 81 and tie-joint main keel 82 form a third herringbone installation unit. The adapter component 30 is fixed to the inner side of the edge sealing beam 52. Tie-joint keel column 81 is inserted into the adjusting adapter component 30 and the horizontal installation position of tie-joint main keel 82 is adjusted by connecting bolt 60. The bottom end of tie-joint main keel 82 is fixedly connected to the outer side of the main building structure 3. Tie-joint secondary keel 83 is installed between adjacent tie-joint main keels 82.

[0077] Back frame keel section: The adapter component 30 is fixed to the inner side of the edge frame beam 14 and the main building structure 3. The back frame main keel 84 is inserted into the adjustment adapter component 30 and the horizontal installation position of the back frame main keel 84 is adjusted by connecting bolts 60. The back frame secondary keel 85 is installed between adjacent back frame main keels 84, and its topmost part is the top edge secondary keel 851.

[0078] Outer end keel section: The outer end main keel 86 is connected sequentially, and its top is fixedly connected to the outer side of the outer end adjacent secondary keel 731 through the vertical limb 401 of the preset connecting angle steel 40. The bottom of the outer end main keel 86 is fixedly connected to the top of the tie main keel 82. The outer end secondary keel 87 is installed between adjacent outer end main keels 86.

[0079] Inner end keel section: The inner end main keel is composed of the inner end of the photovoltaic main keel 72 and the top end of the back frame main keel 84. The inner end secondary keel is composed of the inner end edge secondary keel 732 and the top edge secondary keel 851. At this time, all of them have been completed.

[0080] Step Six: Install the decorative panels: Photovoltaic panel 9 installation: The monocrystalline silicon photovoltaic module is fixed as photovoltaic panel 9 on photovoltaic main keel 72 and photovoltaic secondary keel 73. The outer end and inner end of the panel are respectively connected to the outer edge secondary keel 731 and the inner edge secondary keel 732.

[0081] Installation of curtain wall panel 10: The back frame panel 101, outer end panel 102 and inner end panel 103 are fixed to the corresponding keel segments of the back frame main keel 84, outer end main keel 86 and inner end main keel through curtain wall connectors 50; the inner end of the outer end panel 102 is fixedly connected to the horizontal leg 402 of the connecting angle steel 40, the outer end of the inner end panel 103 is fixedly connected to the inner end edge secondary keel 732, and the inner end of the inner end panel 103 is fixedly connected to the top edge secondary keel 851.

[0082] Construction joint structure 20: The junction between photovoltaic panel 9 and curtain wall panel 10 is sealed; Step 7: Adjustment, Testing and Acceptance: Use a total station to check the flatness, slope and joint sealing of the transition between the photovoltaic panel and the curtain wall panel, and then conduct a photovoltaic system power generation test.

Claims

1. A decorative structure integrating a large-span steel brim with a photovoltaic system, characterized in that: The roof includes a cap frame structure, which includes a main frame structure (1) in the non-cantilever area and a cap frame structure (2) in the cantilever area. The main frame structure (1) is located on top of the main building structure (3). The main frame structure (1) includes frame columns (11) and frame beams (12) set between the tops of the frame columns (11). The edge frame columns (13) and edge frame beams (14) on all four sides form an edge frame structure. The cap frame structure (2) cantilevers outward relative to the edge frame structure. The two are fixedly connected to form a triangular truss. The triangular truss includes a back frame (4) formed by the edge frame structure, a top frame (5) with a horizontal projection, and a slanted frame (6) set between the back frame (4) and the top frame (5). It also includes a decorative system that integrates a photovoltaic system and a curtain wall system. The decorative system includes decorative steel keel and decorative panels. The decorative steel keel is spaced apart and fitted on the outside of the triangular truss. It includes a photovoltaic keel (7) and a curtain wall keel (8). The photovoltaic keel (7) is set on the top surface of the top frame (5). The curtain wall keel (8) is set on the inside of the back frame (4) and is also set at the junction of the top frame (5) and the oblique frame (6) and the top frame (5) and the back frame (4). The photovoltaic keel (7) and the curtain wall keel (8) have a common keel at the junction above the top frame (5). The decorative panels include a photovoltaic panel (9) and a curtain wall panel (10). The photovoltaic panel (9) is set on the top surface of the photovoltaic keel (7). The curtain wall panel (10) is set on the surface of the curtain wall keel (8). The photovoltaic panel (9) and the curtain wall panel (10) are flush at the junction and have a joint structure (20).

2. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 1, characterized in that: The top frame (5) includes an edge frame beam (14), a cantilever beam (51), an edge sealing beam (52), and a beam-to-beam brace (53). The diagonal frame (6) is a beam-to-column brace. The cantilever beam (51) and the beam-to-column brace are both set to correspond to the edge frame column (13). The inner end of the cantilever beam (51) is fixedly connected to the top of the corresponding edge frame column (13). The two ends of the beam-to-column brace are fixedly connected to the bottom of the outer end of the corresponding cantilever beam (51) and the middle of the edge frame column (13), respectively. The two ends of the edge sealing beam (52) are fixedly connected to the inner side of the outer end of the adjacent cantilever beam (51), respectively. The two ends of the beam-to-beam brace are fixedly connected diagonally to the top frame (5) at the opposite corner.

3. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 2, characterized in that: The photovoltaic keel (7) includes photovoltaic keel columns (71), photovoltaic main keels (72) and photovoltaic secondary keels (73). The photovoltaic keel columns (71) are arranged in two rows on the inside and outside, and are connected to the top surfaces of the edge sealing beam (52) and the edge frame beam (14) respectively through the adapter component (30). The two photovoltaic keel columns (71) on the inside and outside respectively form photovoltaic support column groups. The inner and outer ends of each photovoltaic main keel (72) are supported and connected by the corresponding photovoltaic support column groups. The photovoltaic secondary keels (73) are arranged at intervals between adjacent photovoltaic main keels (72) and are fixedly connected to them. The outermost and innermost photovoltaic secondary keels (73) are respectively the outer edge secondary keel (731) and the inner edge secondary keel (732). The top surface of the photovoltaic keel column (71) is fixedly connected to the bottom surface of the photovoltaic main keel (72).

4. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 3, characterized in that: The curtain wall keel (8) includes a back frame keel section set on the outside of the back frame (4), an outer end keel section set at the junction of the top frame (5) and the inclined frame (6), and an inner end keel section set at the junction of the top frame (5) and the back frame (4). The outer end keel section and the inner end keel section are fixedly connected as one unit by a tie keel section set below the inclined frame (6).

5. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 4, characterized in that: The tie keel section includes tie keel column (81), tie main keel (82) and tie secondary keel (83). The top of the tie keel column (81) is connected to the inner side of the sealing beam (52) through the transition component (30). The bottom of the tie keel column (81) is fixedly connected to the top of the tie main keel (82). The bottom of the tie main keel (82) is fixedly connected to the outer side of the main building structure (3). The tie secondary keel (83) is spaced between adjacent tie main keels (82) and fixedly connected to them. The back frame keel section includes a back frame main keel (84) and a back frame secondary keel (85). The top of the back frame main keel (84) is connected to the inner side of the edge frame beam (14) through a transition component (30). The bottom of the back frame main keel (84) is connected to the inner side of the main building structure (3) through a transition component (30). The back frame secondary keels (85) are spaced apart between adjacent back frame main keels (84) and fixedly connected to them. The topmost back frame secondary keel (85) is the top edge secondary keel (851). The outer end keel section includes an outer end main keel (86) and an outer end secondary keel (87). The top inner end of the outer end main keel (86) is provided with a connecting angle steel (40). The vertical limb (401) of the connecting angle steel is fixedly connected to the outer side of the outer end adjacent secondary keel (731). The bottom of the outer end main keel (86) is fixedly connected to the top of the tie main keel (82). The bottom end of the outer end main keel (86) is fixedly connected to the bottom of the tie keel column (81). The top of the outer end secondary keel (87) is shared by the outer end adjacent secondary keel (731). The inner end keel section includes the inner end main keel and the inner end secondary keel. The inner end main keel is composed of the inner end of the photovoltaic main keel (72) and the top end of the back frame main keel (84). The inner end secondary keel is composed of the inner end edge secondary keel (732) and the top end edge secondary keel (851).

6. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 5, characterized in that: The adapter assembly (30) includes channel steel back ribs (301) clamped on both sides of the main component, and an adapter connecting plate (302) fixedly connected to the bottom end of the channel steel back ribs (301). The adapter connecting plate (302) is fixedly connected to the connecting component. The web plate (303) of the channel steel back ribs (301) has an adjustment elongated hole (304) adapted to the connection direction. The main component has a connecting hole (305) that matches the adjustment elongated hole (304). A pad plate (306) is fixedly connected to the outer surface of the web plate (303). The pad plate (306) has a pad plate hole (307). The pad plate hole (307) is a round hole or an elongated hole perpendicular to the adjustment elongated hole (304). The connecting bolt (60) passes through the pad hole (307), the adjusting elongated hole (303) and the connecting hole (304) on both sides to pull the channel steel back rib (301) on both sides, and adjust the distance between the main component and the connecting component. The main component includes the photovoltaic keel column (71), the tie keel column (81) and the back frame main keel (84). The connecting component is the corresponding edge sealing beam (52), the edge frame beam (14) or the main building structure (3). When the connecting component is a rectangular steel pipe, the transition connecting plate (302) is directly connected to the connecting component. When the connecting component is a round steel pipe, the transition connecting plate (302) and the connecting component are connected to the arc surface through the vertical connecting leg (308).

7. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 5, characterized in that: The outer end of the photovoltaic panel (9) is fixedly connected to the outer edge secondary keel (731) and the connecting angle steel (40), and the inner end of the photovoltaic panel (9) is fixedly connected to the inner edge secondary keel (732).

8. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 7, characterized in that: The curtain wall panel (10) corresponds to the back frame keel section, the outer end keel section, and the inner end keel section, respectively, which are the back frame panel (101), the outer end panel (102), and the inner end panel (103). Each panel is fixedly connected to the main keel of each keel section through the curtain wall connector (50). The unit separation of each curtain wall panel corresponds to the position of the secondary keel of each keel section. The inner end of the outer end panel (102) is fixedly connected to the horizontal leg (402) of the connecting angle steel (40), the outer end of the inner end panel (103) is fixedly connected to the inner end adjacent secondary keel (732), and the inner end of the inner end panel (103) is fixedly connected to the top adjacent secondary keel (851).

9. The integrated decorative structure of steel structure large-span cap brim and photovoltaic system according to claim 8, characterized in that: The joint structure (20) is set between the outer end panel (102) and the photovoltaic panel (9), including a half-frame (70) provided on the bottom side of the end of the photovoltaic panel (9). The half-frame (70) overlaps the outer end edge secondary keel (731) and the connecting angle steel (40) and is anchored to the horizontal leg (402) of the connecting angle steel (40) by the first screw (80). An L-shaped connector (90) is provided at the end of the outer end panel (102). The bottom of the L-shaped connector (90) is anchored to the horizontal leg (402) of the connecting angle steel (40) by the second screw (100). The first screw (80) and the second screw (100) are alternately set on the horizontal leg (402). The space between the outer end panel (102) and the photovoltaic panel (9) is filled with sealant (200). The joint structure (20) is also provided between the inner end panel (103) and the photovoltaic panel (9), including a half-subframe (70) provided on the bottom side of the end of the photovoltaic panel (9), a subframe pressure block (300) provided on the half-subframe (70), the subframe pressure block (300) being anchored to the inner end edge secondary keel (732) by a first screw (80), an L-shaped connector (90) provided at the end of the inner end panel (103), the bottom of the L-shaped connector (90) being anchored to the inner end edge secondary keel (732) by a second screw (100), the first screw (80) and the second screw (100) being alternately provided on the inner end edge secondary keel (732), and sealant (200) being filled between the inner end panel (103) and the photovoltaic panel (9).

10. A construction method for a steel structure with a large span and photovoltaic system integrated decorative structure according to claim 8, characterized in that, The construction steps are as follows: Step 1, Pre-construction preparation: Apply BIM modeling and perform finite element numerical simulation analysis to analyze the stress and strain of the brim structure (2). When analyzing, consider the influence of the self-weight of the newly added photovoltaic system on the stress and strain of the brim structure (2). Improve the component specifications of the brim frame structure in situ and cancel the frame bracing (15) of the adjacent frame structure. Step 2, construction surveying and setting out: survey and set out the top of the main building structure (3) to locate the control points of the main frame structure (1) and the cap structure (2); Step 3, construct the main frame structure (1): install the frame column (11) on the top of the main building structure (3), and install the frame beam (12) between the top of the frame column (11) to form the main frame structure (1). The edge frame column (13) and the edge frame beam (14) form the edge frame structure, which serves as the back frame (4) of the triangular truss. Step 4, construct the cap structure (2): The cantilever beam (51) and the beam-column brace form the first herringbone installation unit. The inner end of the cantilever beam (51) is fixed to the top of the adjacent frame column (13), and the outer end extends outward. The inner end of the beam-column brace is fixed to the middle of the adjacent frame column (13), where the beam-column brace serves as the diagonal frame (6). The edge sealing beam (52) and the beam-to-beam brace (53) form the second herringbone installation unit. The edge sealing beam (52) is connected between the inner sides of the outer ends of the adjacent cantilever beam (51), and the beam-to-beam brace (53) is connected to the diagonal position of the top frame (5). The beam-column brace, edge sealing beam (52), and beam-to-beam brace (53) between the cantilever beams (51) at the intersection of the horizontal and vertical cap structure (2) are completed. Step 5: Construction and decoration of steel keel: Photovoltaic keel (7) installation: Fix the adapter component (30) to the top surface of the edge sealing beam (52) and the edge frame beam (14), weld the photovoltaic keel column (71) at the bottom of the photovoltaic main keel (72) corresponding to the position of the adapter component (30), insert the photovoltaic keel column (71) into the adjustment adapter component (30) and adjust the installation elevation of the photovoltaic main keel (72) by connecting bolts (60); install photovoltaic secondary keels (73) between adjacent photovoltaic main keels (72), the outermost and innermost photovoltaic secondary keels (73) are respectively the outer edge secondary keel (731) and the inner edge secondary keel (732); Curtain wall keel (8) installation: Tie-joint keel section: Tie-joint keel column (81) and tie-joint main keel (82) form a third herringbone installation unit. The adapter component (30) is fixed to the inner side of the edge sealing beam (52). The tie-joint keel column (81) is inserted into the adjusting adapter component (30) and the horizontal installation position of the tie-joint main keel (82) is adjusted by connecting bolts (60). The bottom end of the tie-joint main keel (82) is fixedly connected to the outer side of the main building structure (3). Tie-joint secondary keel (83) is installed between adjacent tie-joint main keels (82). Back frame keel section: Fix the transition component (30) to the inner side of the edge frame beam (14) and the main building structure (3), insert the back frame main keel (84) into the adjustment transition component (30) and adjust the horizontal installation position of the back frame main keel (84) by connecting bolts (60); install the back frame secondary keel (85) between adjacent back frame main keels (84), and its topmost part is the top edge secondary keel (851); Outer end keel section: Connect the outer end main keel (86) sequentially, and fix the top of it to the outer side of the outer end adjacent secondary keel (731) through the preset connecting angle steel (40). Fix the bottom of the outer end main keel (86) to the top of the tie main keel (82). Install the outer end secondary keel (87) between adjacent outer end main keels (86). Inner end keel section: The inner end main keel is composed of the inner end of the photovoltaic main keel (72) and the top end of the back frame main keel (84). The inner end secondary keel is composed of the inner end edge secondary keel (732) and the top edge secondary keel (851). At this time, all of them have been completed. Step Six: Install the decorative panels: Photovoltaic panel (9) installation: The monocrystalline silicon photovoltaic module is fixed as a photovoltaic panel (9) on the photovoltaic main keel (72) and the photovoltaic secondary keel (73). The outer end and inner end of the panel are respectively connected to the outer edge secondary keel (731) and the inner edge secondary keel (732). Installation of curtain wall panels (10): The back frame panel (101), the outer end panel (102) and the inner end panel (103) are fixed to the corresponding keel segments of the back frame main keel (84), the outer end main keel (86) and the inner end main keel through the curtain wall connectors (50); the inner end of the outer end panel (102) is fixedly connected to the connecting angle steel (40), the outer end of the inner end panel (103) is fixedly connected to the inner end edge secondary keel (732), and the inner end of the inner end panel (103) is fixedly connected to the top edge secondary keel (851); Construction joint structure (20): The photovoltaic panel (9) and the curtain wall panel (10) are sealed at the junction; Step 7: Adjustment, Testing and Acceptance: Use a total station to check the flatness, slope and joint sealing of the transition between the photovoltaic panel and the curtain wall panel, and then conduct a photovoltaic system power generation test.

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