H-shaped steel drum-shaped folded plate joint suitable for single-layer latticed shell and application method thereof

Abstract

A kind of H-shaped steel drum type folded plate joint suitable for single-layer net shell is suitable for the joint structure of curved roof and curved curtain wall.The node domain is composed of core component, nested standard H-shaped steel splicing joint and corresponding H-shaped steel bar;The core component is composed of center pipe, upper bent multi-panel, lower bent multi-panel and web connecting plate;The positioning line of multiple spatial heterogeneous H-shaped steel bars in the same node domain converges at a point, and the H-shaped steel bars are continuously connected through the nested standard H-shaped steel splicing joint and the corresponding H-shaped bracket splicing composed of web connecting plate and upper and lower bent multi-panel eaves extended from the core component;In the core component, the center pipe is inserted between the spatial heterogeneous web connecting plates to make the web connecting plates continuous, and the upper and lower bent multi-panels are continuously connected through the center surface configuration or the eaves surface configuration between the spatial heterogeneous upper and lower bent multi-panel eaves;The H-shaped steel bars are rigidly connected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building steel structure, and particularly relates to a H-shaped steel drum-shaped folded plate joint and a design, processing and construction method of a single-layer net shell using the joint. BACKGROUND

[0002] The single-layer net shell structure is a conventional structure, and most of the rod members are required to be rigidly connected. The single-layer net shell has two characteristics. One is that the main force rod members are rigidly connected. The other is that the main force rod members are interlaced to form a net. For a force rod member, the out-of-plane calculation length is much smaller than the in-plane calculation length. From the force analysis, the cross section of the H-shaped steel can fully play the material performance. However, there is no simple and general joint method that can fully play the material performance. In the early stage, the buildings are more practical, so the single-layer net shell structure is less used. The bolt ball joint and the welded ball joint of the double-layer net shell can fully play the performance of the double-layer net shell, and this problem is not prominent. In modern times, people's pursuit of architectural art is constantly improving, and thanks to the progress of space design software, more and more curved roof and curved curtain wall can be realized. The single-layer net shell structure is widely used because of its beautiful keel. However, the joint has not been greatly improved. It is urgent and prominent to find a joint that can fully play the structural characteristics and material performance.

[0003] The connection points of the single-layer net shell rod members in the prior art are roughly divided into four types.

[0004] 1. When multiple H-shaped steels are coplanar and intersect at a point, the commonly used joint is a drum-shaped joint, which can realize equal strength connection and will not weaken the cross section strength. However, it is only suitable for the case that the rod members are coplanar and have no torsion, and is not suitable for curved surfaces.

[0005] 2. When the H-shaped steels are non-coplanar and intersect at a point, the embedded hub joint is used in the specification. However, the flange plate at the end of the rod member is cut off, which is equivalent to weakening the cross section bending strength. In addition, the cross section height and intersection angle are limited, and the application range is narrow.

[0006] 3. The aluminum joint has the characteristics of full bolt connection. The force rod member and the aluminum alloy sub-frame are integrally cast, and the corrosion resistance is good. The weight is light. The disadvantages are that the cost of aluminum structural material is high, the web at the joint is disconnected, the shear force is borne by the upper and lower panels, the stress analysis is difficult, the H-shaped steel height in the same joint domain must be the same, the cross section performance cannot be fully played, the processing and on-site positioning precision are high, the rod member angle cannot be too small, the rod member torsion angle must be small, and the processing and installation equipment cost is high.

[0007] 4. The full-welded joint is characterized by wide application range, usually rectangular tube section is adopted to facilitate web welding, and the finished product is beautiful; the disadvantage is that the flange welding often exists misalignment, which cannot fully play the material performance, the inclined intersection of the rod and the through plate has many types and is not easy to process, lacks positioning bolts, and is difficult to install, and the construction precision is low. SUMMARY

[0008] The present application is to solve the problem of rigid connection structure of multiple spatial out-of-plane H-shaped steel rods intersecting at a point. The existing method cannot solve the problem of continuous flange plate and web plate when the rod is twisted. The present application inserts a center circular tube between the twisted webs to make the webs continuous, and bends the multi-surface plate to transition between the twisted flange plates to make the flange plates continuous, so that the rods are rigidly connected. The structure is easy to design, process and construct, low cost and universal, and takes into account aesthetics and practicality. It is suitable for H-shaped steel rod single-layer net shell joint structure of curved roof and curved curtain wall. The node domain is composed of a core component, a nested standard H-shaped steel splicing joint and corresponding H-shaped steel rods; the core component is composed of a center circular tube, a bent multi-surface plate and a web connecting plate; the bent multi-surface plate includes an upper bent multi-surface plate and a lower bent multi-surface plate; the bent multi-surface plate has two multi-surface configurations of center surface configuration and eaves surface configuration, which can be obtained by bending a flat plate; the positioning lines of multiple spatial out-of-plane H-shaped steel rods intersect at a point in the same node domain, and the H-shaped steel rods are spliced with the corresponding H-shaped bracket splicing joint composed of the web connecting plate and the upper and lower bent multi-surface plate eaves by the nested standard H-shaped steel splicing joint and the core component to realize continuous connection; inside the core component, a center circular tube is inserted between the spatial out-of-plane web connecting plates to make the web connecting plates continuous, and the upper and lower bent multi-surface plates are respectively made continuous by the center surface configuration or the eaves surface configuration between the spatial out-of-plane upper and lower bent multi-surface plate eaves; so that the H-shaped steel rods are rigidly connected. Since the node domain shape is similar to a drum type, and the upper and lower bent multi-surface plates are multi-surface configurations, the node is referred to as H-shaped steel drum type folded plate node.

[0009] The center circular tube is located at the center of the node domain, the upper surface thereof is welded with the upper bent multi-surface plate, the lower surface thereof is welded with the lower bent multi-surface plate, and a plurality of web connecting plates are arrayed and welded on the outer wall of the tube; the center circular tube, the upper bent multi-surface plate, the lower bent multi-surface plate and the web connecting plate form a core component by welding; the core component extends a plurality of H-shaped brackets to splice with the H-shaped steel rods, and the splicing joint is a standard H-shaped steel splicing joint. The standard H-shaped steel splicing joint is designed and calculated according to the existing specification atlas.

[0010] Further, the outer plane of the bent multi-panel is parallel to the corresponding plane of the flange plate of the H-shaped steel rod, and the corresponding plane refers to the upper bent multi-panel corresponding to the upper flange plate and the lower bent multi-panel corresponding to the lower flange plate; when the planes are coplanar, the planes are equal-strength welded or bolted through a connecting plate or an end plate; when the planes are overlapped, the bent multi-panel corresponding outer eaves is bolted to the outside of the flange plate of the H-shaped steel rod; the outer plane of the bent multi-panel is partially or entirely extended inward to intersect at a central plane or a central hole, and the remaining outer plane is connected to the central plane through a fold line perpendicular to the positioning line of the corresponding rod; when the fold angle is small, a circular arc is used for transition to reduce stress concentration, and when the fold angle is large, a transverse stiffener is added at the fold; when there is a central plane in the bent multi-panel, the central plane is a central plane configuration, and when there is no central plane in the bent multi-panel, the outer plane is an eave plane configuration; one node includes at least one upper bent multi-panel, one lower bent multi-panel, and two ends of the central circular tube welded.

[0011] Further, the web connecting plate intersects and is welded to the outer wall of the central circular tube, and the intersection can be orthogonal or oblique; the web connecting plate is orthogonal to and welded to the corresponding outer eaves of the upper and lower bent multi-panels; when the corresponding upper and lower bent multi-panels have a central plane, the web connecting plate intersects and is welded to the central plane of the corresponding upper and lower bent multi-panels; the web connecting plate is parallel to the web of the corresponding H-shaped steel rod, and when the planes are coplanar, the planes are equal-strength welded or bolted through a double clamping plate or an end plate; when the planes are overlapped, the web of the H-shaped steel rod is bolted to one side of the web connecting plate, or the web connecting plate is bolted to one side of the web of the H-shaped steel rod.

[0012] Further, the H-shaped steel rod supports 3-8 rods in the same node domain, and the ends of the H-shaped steel rod are connected to the corresponding H-shaped bracket composed of the web connecting plate and the outer eaves of the upper and lower bent multi-panels through a standard H-shaped steel splicing node to realize continuity; the central segment is an H-shaped steel, or a rectangular tube or a circular tube with other cross sections.

[0013] Further, the standard H-shaped steel splicing node is a rigid joint, which is subdivided into a fully welded rigid joint, a bolted rigid joint, a fully bolted rigid joint, or an end plate rigid joint. When the joint is bolted, the joint supports a connecting plate bolted joint, an end plate bolted joint, or an overlapped bolted joint; this is applicable to web splicing and flange plate splicing, and has strong compatibility; when the joint is welded, the weld form and size should meet the equal-strength connection requirements, and when the joint is bolted, the number and specification of the bolts should meet the equal-strength connection requirements.

[0014] The single-layer net shell design, processing and construction method using the H-shaped steel drum-type folded plate node includes the following steps:

[0015] S1, H-shaped single-layer net shell design and deepening;

[0016] S2, steel member processing;

[0017] S3, site construction;

[0018] The single-layer reticulated shell design and deepening method using H-shaped steel drum-shaped folded plate nodes includes the following steps:

[0019] S1.1, determining the control points and directions of the members; the members can be any members that need to specify the strong axis direction, such as H-shaped steel, rectangular tube, etc. The member positioning line is placed on the outside of the member, and the member positioning lines of the same node domain intersect at a point. When the member is an internal member, the member torsion direction is taken as the direction of the angle bisector of the adjacent two surfaces. When the member is a peripheral member, it has only one side adjacent to the surface, and the member torsion direction is taken as the direction perpendicular to the surface. The surface refers to the outer surface of the structure, and each surface boundary is composed of a closed polyline ring connected by at least three member positioning lines. Each surface should be a bounded plane. When the surface boundaries are not coplanar, the surface should be cut, and a virtual load guide bar is added between the control points of the closed polyline ring to cut it into several bounded planes. The member torsion direction of each member is determined by the adjacent 1-2 bounded planes and points to the interior of the structure. According to this rule, all member control points and directions can be defined without conflict, and the surface between members can be determined, which is convenient for adding surface loads in the design stage. The member direction defined according to this rule is more conducive to the construction of the peripheral protection. When the surface adjacent to the member transmits a surface load close in size, the resultant force direction tends to approach the strong axis direction of the member, and the member force effect is good. It is recommended to perform stress analysis according to this principle during design, and to model according to this principle during deepening. Due to modeling needs, other rules can also be defined, and the H-shaped steel drum-shaped folded plate node is still applicable. Stress analysis can use existing single-layer reticulated shell design software (3D3S, SAP2000, ANSYS, etc.) to determine the specifications and materials of H-shaped steel members, preparing for the next step of operation.

[0020] S1.2, determining the center circular tube of the node domain; the center line direction of the center circular tube is taken as the direction of the sum vector of the unit vectors of the torsion directions of all members in the node domain, and it passes through the intersection point of the member positioning lines. The wall thickness should be greater than or equal to the maximum web thickness of all members in the node domain; the pipe diameter should satisfy that the corresponding web connecting plate of the H-shaped steel member in the node domain can intersect with the pipe wall, and the net spacing of adjacent web connecting plates should be greater than or equal to 20 mm to avoid overlapping of welds. Since the circular tube has good effects on bearing axial shear and axial bending moment, but its ability to bear tension and compression along the radial direction is weak, when the axial tension and compression of the member are large, finite element analysis of the node is needed. If necessary, the wall thickness of the center circular tube is thickened or transverse stiffening ribs are supplemented inside the center circular tube to avoid local stress of the center circular tube wall exceeding the limit, and the number and thickness of the transverse stiffening ribs are determined by calculation.

[0021] S1.3, determine the upper and lower bending multi-panel; the edge plane of the upper and lower bending multi-panel is parallel to the corresponding plane of the connected H-shaped steel flange plate, when the central plane form is selected, the central plane is perpendicular to the center line of the central circular tube, and accordingly, the bending multi-panel can be constructed by using geometric knowledge; the center thickness of the bending multi-panel should be greater than or equal to the maximum flange plate thickness in all rigidly connected bar members in the node domain; when the multi-plate is spliced, the edge surface thickness is greater than or equal to the corresponding flange plate thickness of the bar member; when the whole plate is bent, the edge surface thickness is equal to the center thickness; the essence of this node is a beam-to-beam rigidly connected node, and the construction should meet the requirements of the width-thickness ratio of the compression flange overhanging part in P30 annotation No. 2 of 16G519 "Detail drawings of multi-high-rise civil steel nodes".

[0022] S1.4, determine the web connecting plate; the web connecting plate is parallel to the corresponding H-shaped steel web and greater than or equal to the thickness of the corresponding H-shaped steel web; it is orthogonal or oblique to the central circular tube and is welded, it is orthogonal to the corresponding eaves of the upper and lower bending multi-panel and is welded, and the weld size is determined according to the design value of the web connecting plate and the H-shaped steel web equal strength connection bearing capacity.

[0023] S1.5, determine the H-shaped steel splicing node; the stress of each bar member end is extracted from the stress analysis result in step S1, and the H-shaped steel splicing node is designed by using existing node design software or manually calculating according to the specification formula. In order to facilitate construction, it is recommended to use web bolting, and when rigidly connected, the lower flange plate is bolted and the upper flange plate is welded.

[0024] S1.6, determine the support node; the vertical support node can be selected from a circular tube column rigidly connected node or a cross rib plate net rack support hingedly connected node, which can be designed according to the existing specification; the upper end of the support is connected with the lower bending multi-panel of the H-shaped steel drum-shaped folded plate node, and the wall thickness of the central circular tube of this node domain needs to be calculated according to the yield bearing capacity of the node domain in GB50011-2010 "Building seismic design specification" P101 page 8.2.5-3; the lateral support can be regarded as a wall embedded plate or other structural bar welded with part of the H-shaped steel drum-shaped folded plate node, and the weld size is determined according to the support reaction force calculation.

[0025] According to the above steps, a complete set of single-layer net shell structure design using H-shaped steel drum-shaped folded plate nodes can be realized, which can be operated by using existing design software, has basis according to existing specifications and drawings, and can meet the actual design requirements and deepening requirements.

[0026] The processing method of the single-layer net shell steel member using the H-shaped steel drum-shaped folded plate node comprises the following steps:

[0027] S2.1, the modeling and drawing of the H-shaped steel drum-shaped folded plate joint, according to the design drawing and the deepening drawing, using three-dimensional space modeling software, combining the six-step requirements in S1, using geometry knowledge to model and process drawing annotation;

[0028] S2.2, the bending of the multi-panel; first, the multi-panel is unfolded, the spatial multi-panel configuration is unfolded into a two-dimensional plate, the bolt holes and the bending positioning line are retained, the concave foot of the unfolded plate is arc transitioned to avoid stress concentration, according to the selection of the plate, one whole plate is used for bending or multiple plates are used for splicing; ensure that the accuracy meets the relevant construction acceptance specification; then, the unfolded plate is bent multiple times, so that each bending position reaches the design angle value, and the bent multi-panel of the spatial multi-panel configuration is formed;

[0029] S2.3, the processing and positioning of the web connecting plate; taking the top view of the center pipe as the main view, the profile of each intersecting web connecting plate is cut, the side view is obtained by the first cutting, and the front view is obtained by the second cutting, and the web connecting plate is positioned by combining the three views.

[0030] The single-layer net shell field construction method using the H-shaped steel drum-shaped folded plate joint comprises the following steps: during construction, the web bolt and the lower flange plate bolt are installed first, the whole is assembled, the T-shaped steel is used for construction checking, necessary temporary support is supplemented, then the upper flange plate is welded, and the pre-tension is formed on the outer flange after the welding seam is cooled, so that the structural bearing capacity is improved.

[0031] The beneficial effects of the present application are:

[0032] 1. The node of the present application has the advantages of existing technology nodes. It has the performance of a drum-shaped node, the performance of a continuous web embedded hub node, the performance of a continuous flange plate aluminum node, the performance of a universal full-welded node, and is easy to process and construct, and is an ideal node for single-layer net shell structures.

[0033] 2. The node is suitable for H-shaped single-layer net shell, and H-shaped steel is the most ideal material for single-layer net shell stress, so that the advantages of single-layer net shell structure and the performance of H-shaped steel material can be fully utilized by using the node, the material is composed of conventional plates and profiles, which is easy to purchase, the welding amount of the configuration is small, which is easy to process, and the material cost of the curved roof and the curved curtain wall can be reduced; combined with the standard node, the design is facilitated, and the stress analysis difficulty is reduced; efficient modeling can be realized through three-dimensional modeling software combined with secondary development plug-in, and the time limit and processing requirements can be met; the direction of the member takes into account the skin structure, the outer side of the member can be directly installed with an aluminum sub-frame, and the curtain wall panel is matched, without the need to increase the secondary keel, and the bolt-welded connection is convenient for field construction and construction checking. The node can expand the application range of the single-layer net shell. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 This is a schematic diagram of an implementation of the external surface configuration of the H-shaped steel drum-shaped folded plate node described in this invention;

[0035] Figure 2 This is a schematic diagram of a central surface configuration implementation of the H-beam steel drum-shaped folded plate node described in this invention;

[0036] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0037] Figure 4 yes Figure 2 A schematic diagram of a convex cross-sectional structure with a central face;

[0038] Figure 5 yes Figure 2 A schematic diagram of a concave cross-sectional structure with a central surface;

[0039] Figure 6 This is a schematic diagram of the upper bending multi-panel unfolding structure in the H-shaped steel drum-shaped folded plate node of the present invention;

[0040] Figure 7 This is a schematic diagram of the tetrahedron structure of the single-layer reticulated shell with H-shaped steel drum-shaped folded plate nodes described in Embodiment 1 of the present invention;

[0041] Figure 8 This is a schematic diagram of the cubic structure described in Embodiment 1 of the single-layer reticulated shell using H-shaped steel drum-shaped folded plate nodes according to the present invention;

[0042] Figure 9 This is a schematic diagram of the multi-layer configuration structure of the single-layer reticulated shell with H-shaped steel drum-shaped folded plate nodes described in Embodiment 3 of the present invention;

[0043] Figure 10 This is a schematic diagram of the combined structure of the single-layer reticulated shell with truss structure described in Embodiment 4 of the present invention, which uses H-shaped steel drum-shaped folded plate nodes;

[0044] Figure 11 This is a schematic diagram of the structure of the prior art form 1 described in the background section of this invention;

[0045] Figure 12 This is a schematic diagram of the structure of the prior art form 2 described in the background section of this invention;

[0046] Figure 13 This is a schematic diagram of the structure of the prior art form 3 described in the background section of this invention;

[0047] Figure 14 This is a schematic diagram of the structure of the prior art form 4 described in the background section of this invention;

[0048] Reference signs:

[0049] 1 - central circular tube;

[0050] 2 - upper bent multi-panel;

[0051] 3 - lower bent multi-panel;

[0052] 4 - web connecting plate;

[0053] 5 - H-shaped steel bar;

[0054] a - bent multi-panel bending position arc transition;

[0055] b - bent multi-panel concave corner arc transition;

[0056] c - standard H-shaped steel splicing node;

[0057] d - large-angle bending position supplementary web transverse stiffening rib;

[0058] e - central hole in the outer eave surface configuration of the bent multi-panel;

[0059] f - central surface in the central surface configuration of the bent multi-panel;

[0060] g - web double-clip plate bolting in bolted and welded rigid connection;

[0061] h - H-shaped steel hinged node schematic;

[0062] i - full-welded rigid connection schematic;

[0063] j - bent multi-panel outer eave plane;

[0064] k - web lap single-side bolting in bolted and welded rigid connection;

[0065] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0066] The application discloses a H-shaped steel drum-shaped folded plate joint suitable for a single-layer net shell and an application method thereof. The joint domain is composed of a core component, nested standard H-shaped steel splicing joints and corresponding H-shaped steel bars. The core component is composed of a center pipe, a bent multi-panel and a web connecting plate. The bent multi-panel includes an upper bent multi-panel and a lower bent multi-panel. The bent multi-panel has two multi-panel configurations, i.e. a center surface configuration and an eave surface configuration, and can be obtained by bending a flat plate. Positioning lines of the plurality of spatially different H-shaped steel bars in the same joint domain intersect at a point. The H-shaped steel bars are continuously connected through the nested standard H-shaped steel splicing joints and corresponding H-shaped corbels splicing joints formed by the web connecting plate and the upper and lower bent multi-panel eaves of the core component. Inside the core component, the web connecting plate is continuously connected by inserting the center pipe between the spatially different web connecting plates. The upper and lower bent multi-panels are continuously connected by the center surface configuration or the eave surface configuration between the spatially different upper and lower bent multi-panel eaves. The H-shaped steel bars are rigidly connected. Since the joint domain is drum-shaped and the upper and lower bent multi-panels are multi-panel configurations, the joint is referred to as a H-shaped steel drum-shaped folded plate joint.

[0067] The center pipe is located at the center of the joint domain. The upper surface of the center pipe is welded with the upper bent multi-panel, the lower surface of the center pipe is welded with the lower bent multi-panel, and a plurality of web connecting plates are arrayed and welded on the outer wall of the center pipe. The center pipe, the upper bent multi-panel, the lower bent multi-panel and the web connecting plate are welded to form the core component. The core component extends several H-shaped corbels which are spliced with the H-shaped steel bars. The splicing joint is a standard H-shaped steel splicing joint. The standard H-shaped steel splicing joint is designed and calculated according to the existing specification atlas.

[0068] Further, the eave plane of the bent multi-panel is parallel to the corresponding plane of the flange plate of the connected H-shaped steel bar. The upper bent multi-panel corresponds to the upper flange plate, and the lower bent multi-panel corresponds to the lower flange. When the planes are coplanar, the planes are welded or bolted through the connecting plate or the end plate. When the planes are overlapped, the eave of the bent multi-panel extends outwardly and is bolted to the outside of the flange plate of the H-shaped steel bar. Part or all of the eave plane of the bent multi-panel extends inwardly and intersects at a center surface or a center hole. The remaining eave plane is connected to the center surface through a fold line perpendicular to the positioning line of the corresponding bar. When the fold angle is small, a circular arc is used to reduce stress concentration. When the fold angle is large, a transverse stiffening rib is added at the fold. When there is a center surface in the bent multi-panel, the bent multi-panel is in a center surface configuration. When there is no center surface in the bent multi-panel, the bent multi-panel is in an eave surface configuration. At least one upper bent multi-panel, one lower bent multi-panel and the two ends of the center pipe are welded.

[0069] Further, the web connecting plate intersects and is welded with the outer wall of the center circular tube, and the intersection can be orthogonal or oblique, and the web connecting plate is orthogonal and welded with the corresponding outer eaves of the upper and lower bent multi-panel; when the corresponding upper and lower bent multi-panel has a center surface, the web connecting plate intersects and is welded with the center surface of the corresponding upper and lower bent multi-panel; the web connecting plate is parallel to the web of the corresponding H-shaped steel rod, and when it is coplanar parallel, it is equal-strength welded or bolted through double clamps or end plates; when it is lap parallel, the H-shaped steel rod web is bolted to one side of the web connecting plate, or the web connecting plate is bolted to one side of the H-shaped steel rod web.

[0070] Further, the H-shaped steel rod supports 3-8 rods in the same node domain, and the end is connected in series by a standard H-shaped steel splicing node and a corresponding H-shaped bracket splicing composed of a web connecting plate and an upper and lower bent multi-panel eave extending from the core component; the center section is an H-shaped steel, or other cross sections such as rectangular tubes or circular tubes are transitioned into H-shaped steels at both ends.

[0071] Further, the standard H-shaped steel splicing node is a rigid joint, which is subdivided into full-weld rigid joint, bolted-weld rigid joint, full-bolt rigid joint or end plate rigid joint. When it is bolted, it supports connecting plate bolting, end plate bolting or lap bolting; this is applicable to web splicing and flange plate splicing, and has strong compatibility; when it is welded, the weld form and size should meet the equal-strength connection requirements, and when it is bolted, the number and specification grade of bolts should meet the equal-strength connection requirements.

[0072] The single-layer net shell design, processing and construction method using the H-shaped steel drum-type folded plate node comprises the following steps:

[0073] S1, H-shaped single-layer net shell design and deepening;

[0074] S2, steel member processing;

[0075] S3, on-site construction;

[0076] The single-layer net shell design and deepening method using the H-shaped steel drum-type folded plate node comprises the following steps:

[0077] S1.1, determine the control point and direction of the bar; the bar can be any bar that needs to specify the strong axis direction, such as H-shaped steel, rectangular tube, etc. The bar positioning line is placed outside the bar, and the bar positioning lines of the same node domain intersect at a point. When the bar is an internal bar, the bar torsion direction is taken as the angle bisector direction of the adjacent two surfaces. When the bar is a peripheral bar, it has only one side surface, and the bar torsion direction is taken as the direction perpendicular to the surface. The surface refers to the outer surface of the structure, and each surface boundary is composed of a closed polyline ring connected by at least three bar positioning lines. When the surface boundaries are not coplanar, the surface should be cut, and a virtual bar of guide load should be added between the control points of the closed polyline ring to cut it into several bounded planes. The bar torsion direction of each bar is determined by the adjacent 1-2 bounded planes and points to the interior of the structure. According to this rule, all bar control points and directions can be defined without conflict, and the surface between the bars can be determined, which is convenient for adding surface load in the design stage. The bar direction defined according to this rule is more conducive to the construction of the peripheral protection, and when the surface adjacent to the bar transmits a surface load close in size, the resultant force direction tends to approach the strong axis direction of the bar, and the stress effect of the bar is good. It is recommended to analyze the stress according to this principle in the design stage, and to model according to this principle in the deepening stage. Due to the need for modeling, other rules can also be defined, and the H-shaped steel drum-shaped folded plate node is still applicable. The stress analysis can use existing single-layer net shell design software (3D3S, SAP2000, ANSYS, etc.) to determine the specifications and materials of H-shaped steel bars, preparing for the next operation.

[0078] S1.2, determine the center circular tube of the node domain; the center line direction of the center circular tube is taken as the sum vector direction of the unit vectors of the torsion directions of all bars in the node domain, and passes through the intersection point of the bar positioning lines. The wall thickness should be greater than or equal to the maximum web thickness of all bars in the node domain; the pipe diameter should satisfy that the corresponding web plate and pipe wall of the H-shaped steel bar in the node domain can intersect, and the net spacing of adjacent web plates should be greater than or equal to 20mm to avoid overlapping of welds. Since the circular tube has good effect on bearing axial shear and axial bending moment, but its ability to bear tension and compression along the radial direction is weak, when the axial tension and compression of the bar is large, the node needs to be analyzed by finite element analysis. If necessary, thicken the wall thickness of the center circular tube or supplement transverse stiffening ribs inside the center circular tube to avoid local stress exceeding the limit of the center circular tube wall, and the number and thickness of the supplemental transverse stiffening ribs are determined by calculation.

[0079] S1.3, determine the upper and lower bending multi-panel; the edge plane of the upper and lower bending multi-panel is parallel to the corresponding plane of the connected H-shaped steel flange plate, when the central plane form is selected, the central plane is perpendicular to the center line of the central circular tube, and accordingly, the bending multi-panel can be constructed by using geometric knowledge; the center thickness of the bending multi-panel should be greater than or equal to the maximum flange plate thickness in all rigidly connected bar members in the node domain; when the multi-panel is spliced, the edge surface thickness is greater than or equal to the corresponding flange plate thickness of the bar member; when the whole panel is bent, the edge surface thickness is equal to the center thickness; the essence of this node is a beam-to-beam rigidly connected node, and the construction should meet the requirements of the width-thickness ratio of the compression flange overhanging part in P30 annotation No. 2 of 16G519 "Detail drawings of multi-storey and high-rise civil steel nodes".

[0080] S1.4, determine the web connecting plate; the web connecting plate is parallel to the corresponding H-shaped steel web and greater than or equal to the thickness of the corresponding H-shaped steel web; it is orthogonal or oblique to the central circular tube and is welded, it is orthogonal to the corresponding eaves of the upper and lower bending multi-panel and is welded, and the weld size is determined according to the design value of the web connecting plate and the H-shaped steel web equal strength connection bearing capacity.

[0081] S1.5, determine the H-shaped steel splicing node; the stress at the end of each bar member is extracted from the stress analysis result in step S1, and the H-shaped steel splicing node is designed by using existing node design software or manually calculating according to the specification formula. In order to facilitate construction, it is recommended to use web bolting, and when rigidly connected, the lower flange plate is bolted and the upper flange plate is welded.

[0082] S1.6, determine the support node; the vertical support node can be selected from a circular tube column rigidly connected node or a cross rib plate net rack support hingedly connected node, which can be designed according to the existing specification; the upper end of the support is connected with the lower bending multi-panel of the H-shaped steel drum-shaped folded plate node, and the wall thickness of the central circular tube of this node domain needs to be calculated according to the yield bearing capacity of the node domain according to the requirements of GB50011-2010 "Building seismic design specification" P101 page 8.2.5-3; the lateral support can be regarded as a wall embedded plate or other structural bar welded with part of the H-shaped steel drum-shaped folded plate node, and the weld size is determined according to the support reaction force calculation.

[0083] According to the above steps, a complete set of single-layer net shell structure design using H-shaped steel drum-shaped folded plate nodes can be realized, which can be operated by using existing design software, has basis according to existing specifications and drawings, and can meet the actual design requirements and deepening requirements.

[0084] The processing method of the single-layer net shell steel member using the H-shaped steel drum-shaped folded plate node comprises the following steps:

[0085] S2.1, modeling and drawing of H-shaped steel drum-type folded plate joint, according to the design drawing and deepening drawing, using three-dimensional space modeling software, combining the six-step requirements in S1, using geometry knowledge to model and process drawing annotation;

[0086] S2.2, bending multi-panel blanking and bending; first, the bent multi-panel is unfolded, the spatial multi-face configuration is unfolded into a two-dimensional plate, the bolt holes and bending positioning lines are retained, the concave foot of the unfolded plate is arc transitioned to avoid stress concentration, according to the plate selection, one whole plate is blanked and then bent or multiple plates are blanked and then spliced; ensure that the precision meets the relevant construction acceptance specification; then, the unfolded plate is bent multiple times, so that each bending position reaches the design angle value, forming a bent multi-panel of spatial multi-face configuration;

[0087] S2.3, processing and positioning of web connecting plates; taking the top view of the center pipe as the main view, cutting each intersecting web connecting plate, the first cutting obtains its side view, the second cutting obtains its front view, and the three views are combined to mark and position the web connecting plate.

[0088] The single-layer net shell construction method using the H-shaped steel drum-type folded plate joint comprises the following steps: during construction, the web bolts and the lower flange plate bolts are installed first for overall assembly, the T-shaped steel is used for construction calculation, and necessary temporary supports are supplemented, then the upper flange plate is welded, and the welding seam cools to form a pre-tension on the outer flange, thereby improving the structural bearing capacity.

[0089] The H-shaped steel drum-type folded plate joint suitable for single-layer net shell has universality, which is specifically shown as follows:

[0090] Embodiment 1

[0091] Referring to the accompanying Figure 7 , 8 The following is explained;

[0092] The included angle and the twist angle of the H-shaped steel member 5 can be varied within a wide range.

[0093] In terms of the included angle of the member, the included angle θ between adjacent H-shaped steel members 5 is supported within the range of 30°~180°, and the sum of θ in the same node is supported within the range of 180°~423°. For example, the sum of θ of a node of a regular tetrahedron is 3*60°=180°, and a center hole convex configuration can be selected; for example, a cube can be divided into six right tetrahedrons passing through the center point, two adjacent tetrahedrons are removed, and the remaining four tetrahedrons form a node k with six edges intersecting at a point at the center point of the cube, and the internal part of the remaining part of the cube is regarded as the internal structure of the structure, and the sum of θ of the node k is approximately 6*70.5°=423°, and a center surface configuration can be selected.

[0094] Torsion angle: the torsion angle refers to the included angle φ between the plane formed by the web plane of the H-shaped steel member 5, the center line of the center circular tube 1, and the positioning line of the member. The range of a single φ supports 0°-30°. For example, when the height of the H-shaped steel member is h, the diameter of the center circular tube 1 is h / 2, the center line of the H-shaped steel member passes through the center line of the center circular tube 1, and the two straight lines are perpendicular, φ is taken as ASin(h / 2 / h)=30°, and the H-shaped steel web can still intersect with the center circular tube 1. For example, the node k in Embodiment 1, because the center plane of the web of the H-shaped steel member 5 is in the plane formed by the torsion direction of the member and the positioning line of the member, the torsion direction of the member is taken as the direction of the angle bisector of the adjacent two surfaces, the center line direction of the center circular tube 1 is taken as the direction of the sum vector of all member torsion direction unit vectors in the node domain, and the positioning is according to the above rules. In the above node k, the torsion angle φ of 4 members is 30°, and the torsion angle φ of 2 members is 0°. When φ=0°, it is the normal intersection of the web.

[0095] Therefore, the node can be generally applicable to the H-shaped single-layer lattice shell connection node with regular or irregular member included angle and torsion angle, and is a kind of universal performance.

[0096] Embodiment 2

[0097] Referring to the accompanying drawings Figure 2 The following is explained:

[0098] Part of the H-shaped steel members 5 in the same node domain are allowed to be hinged.

[0099] The single-layer lattice shell structure belongs to a statically indeterminate structure, which refers to a system with geometric invariance and redundant constraints. As long as the geometric invariance of the structure is not changed, the stress analysis and design can still be performed after part of the members are changed from rigid connection to hinged connection. For example, part of the horizontal secondary crossbars of the glass curtain wall are hinged with the longitudinal main crossbars, and the main crossbars are rigidly connected. When part of the H-shaped steel members in the same node domain are hinged, they can be regarded as additional hinged H-shaped steel members in the H-shaped steel drum-shaped folded plate node composed of rigidly connected H-shaped steel members. At this time, the web connecting plate corresponding to the hinged H-shaped steel member is added in the core assembly, the web connecting plate intersects with the outer wall of the center circular tube and is welded, the intersection mentioned here can be normal or oblique; when the upper and lower bent multi-panel has a central surface, the web connecting plate intersects with the central surface of the upper and lower bent multi-panel and is welded; when the upper and lower bent multi-panel has a central hole, the web connecting plate intersects with the eaves of the upper and lower bent multi-panel and is welded; the web connecting plate is parallel to the web of the corresponding H-shaped steel member, and when it is coplanar, it is welded with equal strength or bolted through double clamps; when it is overlapped, the web of the H-shaped steel member is bolted to one side of the web connecting plate, or the web connecting plate is bolted to one side of the web of the H-shaped steel member.

[0100] Therefore, the node can be applied to the situation that the height difference between the upper flange plates or the lower flange plates of part of the H-shaped steel bars 5 in the same node field is greater than or equal to 150 mm, and is a kind of universal performance.

[0101] Embodiment 3

[0102] As shown in the accompanying drawings Figure 9

[0103] When the height difference between the upper flange plates or the lower flange plates of part of the H-shaped steel bars is greater than or equal to 150 mm, a multi-layer configuration can be used; the multi-layer configuration refers to an H-shaped steel drum-shaped folded plate node composed of at least three folded multi-faceted plates, and the interval between each folded multi-faceted plate is greater than or equal to 150 mm. Each layer of folded multi-faceted plate is connected with part of the flange plate of the H-shaped steel bar, and the inner folded multi-faceted plate is an outer ring plate, the center of which is tangent to the center tube, and the outer ring width should meet the relevant requirements of the 16G519 “Multi-story and High-rise Civil Steel Node Detail Drawing” P21 Frame Beam and Center Tube Outer Ring Stiffening Type Connection Drawing Set.

[0104] Therefore, the node can be applied to the situation that the height difference between the upper flange plates or the lower flange plates of part of the H-shaped steel bars 5 in the same node field is greater than or equal to 150 mm, and is a kind of universal performance.

[0105] Embodiment 4

[0106] Referring to the accompanying drawings Figure 10 Supporting combination with truss structure.

[0107] When a single-layer net shell is used for a large-span space structure, a lower chord can be added below part of the net shell bars, or an upper chord can be added above part of the net shell bars, to form a truss system and improve the overall rigidity and bending strength of the structure.

[0108] Therefore, the node can be applied to the situation that the height difference between the upper flange plates or the lower flange plates of part of the H-shaped steel bars 5 in the same node field is greater than or equal to 150 mm, and is a kind of universal performance.

[0109] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting and the claims.

[0110]

[0111] ​​Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A H-section steel drum-shaped folded plate joint suitable for a single-layer latticed shell, characterized in that: The node domain is composed of a core component, a nested standard H-shaped steel splicing node and corresponding H-shaped steel bars; the core component is composed of a center pipe, a bent multi-panel and a web connecting plate; the bent multi-panel includes an upper bent multi-panel and a lower bent multi-panel; the bent multi-panel has two multi-panel configurations of a center surface configuration and an eave surface configuration, and each can be obtained by bending a flat plate; the positioning lines of the plurality of spatially different H-shaped steel bars intersect at a point in the same node domain, and the H-shaped steel bars are spliced with the corresponding H-shaped bracket splicing of the web connecting plate and the upper and lower bent multi-panel eaves extending from the core component through the nested standard H-shaped steel splicing node; the included angle θ between adjacent H-shaped steel bars (5) supports 30°-180° alone, and the sum of θ in the same node supports 180°-423°; the included angle φ between the web plane of the H-shaped steel bar (5), the center line of the center pipe (1) and the plane formed by the positioning line of the bar supports 0°-30° alone; inside the core component, the center pipe is arranged between the spatially different web connecting plates, the through plate formed by the bent multi-panels welded at both ends of the center pipe, and the outer ring plate formed by the bent multi-panels welded in the middle.

2. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: The center pipe is located at the center of the node domain, the upper surface thereof is welded with the upper bent multi-panel, the lower surface thereof is welded with the lower bent multi-panel, and a plurality of web connecting plates are arrayed and welded on the outer wall of the pipe; the center pipe, the upper bent multi-panel, the lower bent multi-panel and the web connecting plate form a core component through welding; the core component extends a plurality of H-shaped brackets to splice with the H-shaped steel bars, and the splicing node is a standard H-shaped steel splicing node.

3. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: The eave plane of the bent multi-panel is parallel to the corresponding plane of the flange plate of the connected H-shaped steel bar; the corresponding refers to that the upper bent multi-panel corresponds to the upper flange plate, and the lower bent multi-panel corresponds to the lower flange; when the parallel is coplanar, equal-strength welding or bolting through a connecting plate or an end plate is adopted; when the parallel is overlapping, the corresponding eave of the bent multi-panel extends to the outside of the flange plate of the H-shaped steel bar and is bolted therewith; part or all of the eave plane of the bent multi-panel extends inwardly to a center surface or a center hole, and the remaining eave plane is connected to the center surface along a fold line perpendicular to the positioning line of the corresponding bar; when the fold is a small-angle bend, a circular arc transition is adopted to reduce stress concentration; when the fold is a large-angle bend, a transverse stiffening rib is supplemented at the bent portion; when there is a center surface in the middle of the bent multi-panel, the bent multi-panel is in a center surface configuration; when there is no center surface in the middle of the bent multi-panel, the bent multi-panel is in an eave surface configuration; one node includes at least one upper bent multi-panel, one lower bent multi-panel and the two ends of the center pipe welded therewith.

4. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: The web connecting plate intersects and is welded with the outer wall of the center circular tube, and the intersection can be orthogonal or oblique. Meanwhile, the web connecting plate intersects and is welded with the corresponding outer eaves of the upper and lower bent multi-panel. When the corresponding upper and lower bent multi-panel has a center surface, the web connecting plate intersects and is welded with the center surface of the corresponding upper and lower bent multi-panel. The web connecting plate is parallel to the web of the corresponding H-shaped steel rod, and when the parallel is coplanar, the web connecting plate is welded or bolted through double clamps or end plates. When the parallel is overlapped, the web of the H-shaped steel rod is bolted to one side of the web connecting plate, or the web connecting plate is bolted to one side of the web of the H-shaped steel rod.

5. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: The H-shaped steel rod in the same node domain is 3-8 rods, and the end thereof is spliced with the corresponding H-shaped bracket composed of the web connecting plate and the outer eaves of the upper and lower bent multi-panel through a standard H-shaped steel splicing node extending from the core component. The center section is an H-shaped steel, or a rectangular tube or a circular tube with other sections being transitioned into an H-shaped steel at both ends.

6. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: The standard H-shaped steel splicing node is a rigid joint, which is subdivided into a fully welded rigid joint, a bolted and welded rigid joint, a fully bolted rigid joint, or an end plate rigid joint.

7. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: When part of the H-shaped steel rods in the same node domain are hinged, they can be considered as being added to the H-shaped steel drum-shaped folded plate node composed of the rigid H-shaped steel rods. At this time, the web connecting plate corresponding to the hinged H-shaped steel rod is added to the core component. The web connecting plate intersects and is welded with the outer wall of the center circular tube, and the intersection can be orthogonal or oblique. When the upper and lower bent multi-panel has a center surface, the web connecting plate intersects and is welded with the center surface of the upper and lower bent multi-panel. When the upper and lower bent multi-panel has a center hole, the web connecting plate intersects and is welded with the outer eaves of the upper and lower bent multi-panel. The web connecting plate is parallel to the web of the corresponding H-shaped steel rod, and when the parallel is coplanar, the web connecting plate is welded or bolted through double clamps. When the parallel is overlapped, the web of the H-shaped steel rod is bolted to one side of the web connecting plate, or the web connecting plate is bolted to one side of the web of the H-shaped steel rod.

8. A H-steel drum-shaped folded plate joint suitable for a single-layer latticed shell according to claim 1, characterized in that: When the height difference between the upper flange plates or the lower flange plates of the H-shaped steel rod is greater than or equal to 150 mm, a multi-layer configuration is used. The multi-layer configuration refers to an H-shaped steel drum-shaped folded plate node composed of at least three bent multi-panels, and the distance between each bent multi-panel is greater than or equal to 150 mm.

9. An application method of an H-shaped steel drum-shaped folded plate node suitable for a single-layer net shell, which comprises the following implementation steps: S1, H-shaped steel single-layer net shell design and deepening; S2, steel component processing; S3, on-site construction; The single-layer net shell design and deepening method of the H-shaped steel drum-shaped folded plate node comprises the following steps: S1.1, determine the control point and direction of the bar; the bar can be any bar that needs to specify the strong axis direction, such as H-shaped steel, rectangular tube, etc.; the bar positioning line is placed outside the bar, and the bar positioning lines of the same node domain intersect at a point; when the bar is an internal bar, the bar torsion direction is taken as the angle bisector direction of the surface of the adjacent two surfaces; when the bar is a peripheral bar, it has only one side surface, and the bar torsion direction is perpendicular to the surface direction; the surface refers to the outer surface of the structure, and each surface boundary is composed of a closed polyline ring connected by at least three bar positioning lines; when the surface boundaries are not coplanar, the surface should be cut, and a virtual bar of guide load is added between the control points of the closed polyline ring to cut it into several bounded planes; the bar torsion direction of each bar is determined by the adjacent 1-2 bounded planes and points to the interior of the structure; according to this rule, all bar control points and directions can be defined without conflict, and the surface between bars can be determined, which is convenient for additional surface load in the design stage; the bar direction defined according to this rule is more conducive to the construction of the peripheral protection, and when the surface adjacent to the bar transmits a surface load close in size, the resultant force direction tends to approach the strong axis direction of the bar, and the stress effect of the bar is good; it is recommended to analyze the stress according to this principle during design, and to model according to this principle during deepening; Other rules can also be defined due to modeling needs, and the H-shaped steel drum-shaped folded plate node is still applicable; The stress analysis can use existing single-layer net shell design software to determine the specifications and materials of H-shaped steel bars, preparing for the next operation; S1.2, determine the center circular tube of the node domain; the center line direction of the center circular tube is taken as the direction of the sum vector of the unit vectors of the torsion directions of all bars in the node domain, and passes through the intersection point of the bar positioning lines; the wall thickness should be greater than or equal to the maximum web thickness of all bars in the node domain; the pipe diameter should satisfy that the corresponding web connecting plate of the H-shaped steel bar in the node domain can intersect with the pipe wall, and the net spacing of adjacent web connecting plates should be greater than or equal to 20mm to avoid overlapping of welds; since the circular tube has good effect on bearing axial shear force and axial bending moment, but its ability to bear tension and compression along the radial direction is weak, when the axial tension and compression of the bar is large, the node needs to be analyzed by finite element analysis; if necessary, thicken the wall thickness of the center circular tube or supplement transverse stiffening ribs inside the center circular tube to avoid local stress exceeding the limit of the center circular tube wall, and the number and thickness of the supplemental transverse stiffening ribs are determined by calculation; S1.3, determine the upper and lower bending multi-panel; the edge plane of the upper and lower bending multi-panel is parallel to the corresponding plane of the connected H-shaped steel flange plate, when the central plane form is selected, the central plane is perpendicular to the center line of the central circular tube, and accordingly, the bending multi-panel can be constructed by using geometric knowledge; the center thickness of the bending multi-panel should be greater than or equal to the maximum flange plate thickness in all rigidly connected bar members in the node domain; when multiple plates are spliced, the edge surface thickness is greater than or equal to the corresponding flange plate thickness of the bar member; when the whole plate is bent, the edge surface thickness is equal to the center thickness; the essence of this node is a beam-to-beam rigidly connected node, and the construction should meet the requirements of the width-thickness ratio of the compression flange overhanging part in P30 annotation No. 2 of 16G519 "Detail drawings of multi-high-rise civil steel nodes"; the bending part is determined to be a circular arc transition or supplemented with a transverse stiffening rib according to the angle size; the distance from the intersection point of the positioning line of the H-shaped steel member to the section splicing node of the H-shaped steel member should be greater than or equal to the height of the H-shaped steel member; S1.4, determine the web connecting plate; the web connecting plate is parallel to the corresponding H-shaped steel web and greater than or equal to the thickness of the corresponding H-shaped steel web; it is orthogonal or oblique to the central circular tube and is welded, it is orthogonal to the corresponding eaves of the upper and lower bending multi-panel and is welded, and the weld size is determined according to the design value of the web connecting plate and the H-shaped steel web equal strength connection bearing capacity; S1.5, determine the H-shaped steel splicing node; extract the stress of each bar member end in the stress analysis result in step S1, and design the H-shaped steel splicing node by using existing node design software or manually calculating according to the specification formula; for the convenience of construction, it is recommended to use the web bolted connection, and when it is rigidly connected, the lower flange plate is bolted and the upper flange plate is welded; S1.6, determine the support node; the vertical support node can be selected from a circular tube column rigidly connected node or a cross rib plate net rack support hingedly connected node, which can be designed according to the existing specification; the upper end of the support is connected with the lower bending multi-panel of the H-shaped steel drum-shaped folded plate node, and the wall thickness of the central circular tube of the node domain needs to be calculated according to the requirements of GB50011-2010 "Building Seismic Design Specification" P101 page 8.2.5-3 to verify the yield bearing capacity of the node domain; the lateral support can be regarded as a wall embedded plate or other structural member welded with part of the H-shaped steel drum-shaped folded plate node, and the weld size is determined according to the support reaction force calculation; According to the above steps, a complete set of single-layer net shell structure design using H-shaped steel drum-shaped folded plate nodes can be realized, which can be operated by using existing design software, has basis according to existing specifications and drawings, and can meet the actual design requirements and deepening requirements; The processing method of the single-layer net shell steel member using the H-shaped steel drum-shaped folded plate node comprises the following steps: S2.1, modeling and drawing of the H-shaped steel drum-shaped folded plate node, according to the design drawing and deepening drawing, using three-dimensional space modeling software, combining the requirements of the six steps in S1 to model and process drawing marking by using geometric knowledge; S2.2, bending multi-panel blanking and bending; first, the bending multi-panel is unfolded, the spatial multi-surface configuration is unfolded into a two-dimensional plate, the bolt holes and the bending positioning lines are reserved, the concave foot of the unfolded plate is rounded to avoid stress concentration, and according to the selection of the plate, one whole plate is blanked and then bent or multiple plates are blanked and then spliced; the accuracy is ensured to meet the relevant construction acceptance specifications; then, the unfolded plate is bent multiple times, so that each bending position reaches the design angle value, and the bending multi-panel of the spatial multi-surface configuration is formed; S2.3, processing and positioning of the web connecting plate; taking the top view of the center circular tube as the main view, each intersecting web connecting plate is cut to obtain a side view in the first cutting, and a front view in the second cutting, and the web connecting plate is positioned according to the three views; The single-layer net shell construction method using the H-shaped steel drum-shaped folded plate joint comprises the following steps: during construction, the web bolt and the lower flange plate bolt are installed first to perform overall assembly, T-shaped steel is used for construction calculation, necessary temporary support is supplemented, then the upper flange plate is welded, and the pre-tension is formed on the outer flange after the welding seam is cooled, thereby improving the structural bearing capacity.

Images