CN114837483A - High-low span portal steel frame building structure and construction process thereof - Google Patents
High-low span portal steel frame building structure and construction process thereof Download PDFInfo
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- CN114837483A CN114837483A CN202210467535.4A CN202210467535A CN114837483A CN 114837483 A CN114837483 A CN 114837483A CN 202210467535 A CN202210467535 A CN 202210467535A CN 114837483 A CN114837483 A CN 114837483A
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- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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Abstract
The steel frame building structure comprises vertical walls, tree-shaped support columns, a roof ring beam, a roof inclined radial main rod and a roof radial main rod, wherein the roof inclined radial main rod and the roof radial main rod are respectively distributed on two sides of the roof ring beam, and the upper ends of the roof inclined radial main rods and one ends of the roof radial main rods are connected to the roof ring beam; the tree-shaped support columns are positioned below the ridge ring beam and the roof inclined radial main rod, and the upper ends of the tree-shaped support columns are connected with the ridge ring beam and/or the roof inclined radial main rod; the lower end of the inclined radial main rod of the roof is connected to the vertical wall; and a horizontal strut is also connected between the two adjacent roof inclined radial main rods. The application also provides a construction process of the steel frame building structure. This application utensil positioning accuracy is high, building construction cost low grade advantage.
Description
Technical Field
The application relates to the technical field of large public buildings, in particular to a high-low span portal steel frame building structure and a construction process thereof.
Background
With the development of economic technology and the popularization of the country to green buildings, the steel frame building structure has the advantage of being unique in the aspect of green buildings as an assembly type building. Steel frame building structures have developed rapidly in recent years, become the first choice of buildings such as many factory buildings, movie theaters, gymnasiums and the like, and especially in large-span structures and irregular space structures, steel frame building structures gradually become the mainstream choice in structural design due to high plasticity, strong shape forming capability and high construction speed.
With the development of the times, people have more and more requirements on building shapes, and the existing plane roof cannot meet the requirements of building design, so that the design of an inclined roof or a curved roof occupies higher and higher proportion in the existing design. In the existing curved roof design, the problems that the structural design can not perfectly meet the requirement of architectural design, the processing difficulty of a spatial irregular curved surface member is high, the processing cost is high, and the precision can not be met often exist; the processing and mounting precision of the steel member has great influence on the final forming appearance and the stress working condition of the steel structure.
At present, most of short-side spans of large-span monomer public buildings such as sports training halls, exhibition halls, large-scale entertainment venues and the like are 30-42 m, most of the short-side spans are single-layer buildings of light steel roofs, which is very unfavorable for land conservation, and the conventional prestressed concrete frame structure is adopted, so that the phenomenon of fat beams and columns can be caused, meanwhile, the problems of slow construction progress of concrete on-site casting and difficulty in improving the construction civilization degree exist, the manufacturing cost is increased finally, and the requirements of energy conservation, emission reduction and low-carbon economy can not be met.
Disclosure of Invention
The application aims to provide a high-low span portal steel frame building structure and a construction process thereof, and solves the problems of high construction cost and high assembly difficulty of the large-span steel frame building structure.
In a first aspect, the application provides a high-low bay portal steel frame building structure, which adopts the following technical scheme:
a high-low span door type steel frame building structure comprises a vertical wall, a ridge ring beam, a plurality of tree-shaped support columns, a plurality of roof inclined radial main rods and a plurality of roof radial main rods, wherein the roof inclined radial main rods and the roof radial main rods are respectively distributed on two sides of the ridge ring beam, and the upper ends of the roof inclined radial main rods and one ends of the roof radial main rods are connected to the ridge ring beam; the tree-shaped support columns are positioned below the ridge ring beam and the roof inclined radial main rod, and the upper ends of the tree-shaped support columns are connected with the ridge ring beam and/or the roof inclined radial main rod; the lower end of the roof inclined radial main rod is connected to the vertical wall; and a horizontal strut is also connected between the two adjacent roof inclined radial main rods.
The high-low span portal steel frame building structure is matched with a concrete structure to be installed and used, the concrete structure adopts a layer-by-layer platform retreating design, a ridge ring beam, a radial main rod of a roof inclined and a horizontal strut form a single-layer irregular steel grid structure, and a curtain wall enclosure structure can be wrapped on the steel grid structure, for example, a glass curtain wall or a metal curtain wall is installed. By adopting the technical scheme, a large through-height space is formed in the high-low span portal steel frame building structure room, and the requirement of use function is met; the finally installed bearing structure of the curtain wall enclosure structure is a steel grid structure formed by a ridge ring beam, a radial main rod of a roof, a slant radial main rod of a roof and horizontal support rods, one end of the steel grid structure is supported on the roof of the concrete structure by a tree-shaped support column, and the other end of the steel grid structure is supported by a vertical wall. The steel frame building structure is suitable for a structural system which is large in space, high in integrity requirement, high in span, low in span, light and thin, and the light structural form of the steel frame building structure is simpler than that of a truss structural rod piece; the tree-shaped support columns at high and low ends are arranged, so that a larger space can be spanned, and the whole space effect is good. The inclined radial main rods of the roof are connected through the horizontal supporting rods to form an integral structure, so that the earthquake resistance is superior; the steel members used in the whole building structure design are fewer in number, the assembly is simpler, the construction period is short, and the building cost is reduced.
Optionally, the vertical wall and the tree-shaped support columns are both made of steel structures; tree-shaped support columns are also arranged below the radial main roof rods, and the radial main roof rods are connected with the upper ends of the corresponding tree-shaped support columns; and a horizontal strut is also connected between every two adjacent roof radial main rods.
Through adopting above-mentioned technical scheme, can do the length size of the radial mobile jib in roof bigger to extend the space region that monomer building level to, increase building area and space volume, simultaneously, can produce a horizontal pulling force to the ridge girt through the radial mobile jib in roof, balance mutually with the lateral stress that the radial mobile jib of roofing slope produced the ridge girt, reduce the horizontal pressure that the radial mobile jib of roofing slope produced to erecting the wall, improve overall structure's reliability and stability.
Optionally, the vertical wall includes a plurality of vertically arranged door steel columns; all the door steel columns are arranged at intervals, the upper ends of two adjacent door steel columns are fixedly connected through connecting steel rods, and the lower ends of the door steel columns are fixedly connected to the concrete ground through fixed hinged supports or elastic hinged supports.
By adopting the technical scheme, the vertical wall can ensure the integral visual effect by adopting the door steel columns arranged at intervals; can guarantee the reliable and stable nature of erecting the wall through setting up the connection steel pole.
Optionally, the lower ends of the tree-shaped support columns are fixedly connected to floors at different elevations on the high-rise concrete ground through sliding hinged supports or elastic hinged supports or fixed hinged supports respectively; the upper end of the tree-shaped support column is connected with the ridge ring beam and the roof inclined radial main rod through pin roll joints.
By adopting the technical scheme, the influence on the main structure can be controlled by selecting the proper support, and more additional stress can not be generated. As the preferred scheme, the lower end of the tree-shaped support column is fixedly connected to the high-rise concrete ground through a sliding hinged support. The whole steel grid structure is arranged in a cross-layer mode; arborescent support column in this application can bear the demand of vertical power and horizontal power, compromise frivolous effect simultaneously, arborescent support column and perpendicular wall cooperation, both form a plurality of single pin height gate-type steel frame construction with radial mobile jib of ridge ring beam and roofing slope, link firmly the back through horizontal branch between the radial mobile jib of adjacent roofing slope and see into many pin height gate-type steel frame construction, this kind of component combination compromises the atress characteristics of "roof" and "post" in the traditional meaning simultaneously: the horizontal component bears bending moment and axial force (similar to an oblique column), and the vertical component bears axial force and can balance bending moment transmitted by the ridge ring beam; the steel frame building structure is guaranteed to form a large through-height space and has sufficient stability and reliability.
Optionally, the horizontal supporting rod is a round steel pipe or a square steel pipe; the horizontal supporting rod is fixedly connected with the inclined radial main rod of the roof and the radial main rod of the roof by welding.
Through adopting above-mentioned technical scheme, horizontal branch can guarantee between the radial mobile jib of roofing slope and the radial mobile jib of roof between the coordinated deformation, forms the common atress system in space to can bear pressure and can bear the pulling force again, improve holistic stability. Meanwhile, the horizontal supporting rod, the inclined radial main rod of the roof and the radial main rod of the roof are connected through welding to facilitate construction, connection is firm, and effective transmission of force and building indoor effect are guaranteed. Preferably, the welding process adopts full penetration split welding, the nodes and the main parts are controlled to be primary welding seams, and the rest parts are controlled to be secondary welding seams.
Optionally, the door steel column and the ridge ring beam are made of square steel tubes, and the tree-shaped support columns are made of round steel tubes.
By adopting the technical scheme, the main rod piece can resist bending moment and bear axial force, and meanwhile, the surfaces of the door steel column and the ridge ring beam are convenient to be attached to the outer skin of the building.
In a second aspect, the construction process of the high-low span portal steel frame building structure provided by the application adopts the following technical scheme:
a construction process of a high-low span portal steel frame building structure comprises the following steps:
s1, arranging a vertical wall and a plurality of temporary geotechnical steel pipe supporting columns;
s2, installing the ridge ring beam on the temporary geotechnical steel pipe support column in a segmented manner;
s3, installing a radial main rod of the roof and an inclined radial main rod of the roof on two sides of each ridge ring beam when each ridge ring beam is installed, wherein one end of the radial main rod of the roof and one end of the inclined radial main rod of the roof are fixedly connected to the butt-joint brackets on two sides of the corresponding ridge ring beam respectively, and the other end of the inclined radial main rod of the roof is fixedly connected to the upper end of the vertical wall;
s4, horizontal struts are arranged between the adjacent roof inclined radial main rods and between the adjacent roof radial main rods;
s5, mounting a plurality of tree-shaped support columns below the ridge ring beam and the roof inclined radial main rod, wherein the upper ends of the tree-shaped support columns are connected to the corresponding ridge ring beam and the corresponding roof inclined radial main rod through pin roll nodes;
and S6, unloading the temporary geotechnical steel pipe support column.
By adopting the technical scheme, the construction process is optimized, and the movable roof inclined support is replaced by the fixed temporary geotechnical steel pipe support column, so that the problem of structural stability in the construction process is effectively solved; install earlier and originally be the ridge ring beam of secondary beam, provide stable benchmark for the radial mobile jib installation location of roof slope as the girder, better assurance installation accuracy for whole steel frame building structure's construction is safer, high-efficient.
Optionally, before the step S1, a concrete ground and a concrete step-down floor matched with the high-low spanning portal steel frame building structure need to be poured, and a plurality of steel embedded pieces are pre-embedded during the pouring construction of the concrete ground and the concrete step-down floor structure; before the vertical wall is installed, a hinged support used for fixedly connecting the vertical wall is installed on the corresponding steel embedded part; and before the installation of the tree-shaped supporting columns, hinged supports for fixedly connecting the tree-shaped supporting columns are installed on the corresponding steel embedded parts.
Through adopting above-mentioned technical scheme, realize this steelframe building structure's quick installation fixed. In the technical scheme, the hinged support is installed by adopting a tower crane, the maximum weight of a single hinged support is about 2 tons, and the hoisting capacity of the tower crane on site meets the hoisting requirement; and hoisting the hinged support in place on the steel embedded part by using a tower crane, and welding a welding seam between the hinged support and the steel embedded part after the hinged support is positioned and confirmed to be correct according to the hinged support positioning coordinate.
Optionally, in step S1, the temporary geotechnical steel pipe support column is a standard component and is divided into standard lengths of 6m, 5m, 4m, 3m, 2m, 1m and 0.5m, and the lower end of the temporary geotechnical steel pipe support column is connected to the corresponding steel embedded part by using a hexagonal bolt flange node; the upper ends of two adjacent temporary geotechnical steel pipe support columns are connected by adopting a connecting steel beam in a pulling mode, or the upper end of each temporary geotechnical steel pipe support column is provided with a wind cable in a pulling mode.
Through adopting above-mentioned technical scheme, interim geotechnological steel pipe support column is according to architectural design drawing location installation, need not the field measurement cutting, and convenient direct use has accelerated the engineering progress to the precision of each interim geotechnological steel pipe support column length dimension has been guaranteed. The stability of the temporary geotechnical steel pipe support column in the construction process is ensured by drawing connection of the connecting steel beams or drawing the wind cable. Furthermore, according to the difference of the supporting counter force of the temporary geotechnical steel pipe supporting columns, the concrete structure lower layer corresponding to the temporary geotechnical steel pipe supporting column with large stress needs to be jacked back for reinforcement.
Optionally, in step S1, a negative difference plate and a limit baffle are disposed at the top end of the temporary geotextile steel tube support column; the ridge ring beam is arranged on the negative difference plate, and the side part of the ridge ring beam is limited by arranging a limiting baffle.
By adopting the technical scheme, the mounting accuracy and stability of the ridge ring beam are ensured; the limit baffle is arranged by combining the bending angle of the ring beam.
Optionally, in step S4, the horizontal struts are fixedly connected to the roof inclined radial main rod and the roof radial main rod by welding; the welding is full penetration split welding.
By adopting the technical scheme, the quick connection can be conveniently realized, the stable reliability of the connection can be ensured, and the appearance is attractive.
Optionally, the hinged support for fixedly connecting the vertical wall is a fixed hinged support or an elastic hinged support; the hinged support for fixedly connecting the tree-shaped support columns is an elastic hinged support or a sliding hinged support; the elastic hinged support and the sliding hinged support are locked temporarily in the installation stage and are opened after the whole steel frame building structure is integrally formed.
Through adopting above-mentioned technical scheme, effectively prevent the position change that produces in the installation to guarantee the accurate reliability of each component equipment. In the technical scheme, the elastic hinged support or the sliding hinged support takes a limiting measure on the corner and the displacement of the hinged support in the assembling process of the corresponding component, the temporary limiting steel plate is welded and fixed, after the whole steel frame building structure is assembled, the temporary limiting steel plate is cut off before the temporary geotechnical steel pipe support column is unloaded, and the deformation capacity of the corner and the displacement of the hinged support is recovered, so that the design requirement is met.
Optionally, before the step S1, performing simulation analysis on the integral steel structure of the steel frame building structure through finite element analysis software MIDAS, selecting a member with a large stress in the calculation result as a monitoring object, and arranging a plurality of monitoring points; monitoring points are arranged at the same positions on two sides of the component, and stress change data monitored by the monitoring points are wirelessly transmitted to a terminal platform, so that 24-hour automatic monitoring is realized.
By adopting the technical scheme, the reliability of the monitoring data is ensured, so that the follow-up construction and engineering quality is guaranteed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. this steel frame building structure arranges through the arborescent support column of high low side, can stride across bigger space, and whole space is effectual, has the height simultaneously and strides with frivolous structural feature.
2. The roof inclined radial main rods and the roof radial main rods in the steel frame building structure are connected through the horizontal supporting rods to form an integral structure, and the shock resistance of the integral structure is superior.
3. The light structural form of the steel frame building structure is simpler than the arrangement of truss structural rods; the steel members used in the whole building structure design are fewer in number, the assembly is simpler, the construction period is short, and the building cost is reduced.
4. Through selecting proper hinged support in the steel frame building structure, the influence on the main structure is controllable, and more additional stress can not be generated.
5. Through optimizing the construction process in this door-like steel frame building structure's of height construction technology, through setting up interim geotechnological steel pipe support column, install earlier and originally be the ridge ring roof beam of secondary beam, provide stable benchmark for the radial mobile jib installation location of roofing slope as the girder, better assurance installation accuracy for whole steel frame building structure's construction is safer, high-efficient.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.
Fig. 2 is a partially enlarged schematic view at a in fig. 1.
Fig. 3 is a schematic view of the connection structure of the vertical wall and the inclined radial main rod of the roof in embodiment 1 of the present application.
Fig. 4 is a schematic flow chart of the construction process in embodiment 2 of the present application.
Fig. 5 is a schematic view of a temporary support structure for a steel column for doors according to embodiment 2 of the present application.
Fig. 6 is a first schematic view of an installation structure of a temporary geotextile steel tube support column in embodiment 2 of the present application.
Fig. 7 is a schematic view of an installation structure of a temporary geotextile steel tube support column in example 2 of the present application.
In the figure, 1, vertical wall; 1a, door steel columns; 1b, connecting a steel rod; 2. a tree-shaped support column; 3. a ridge ring beam; 3a, butting brackets; 4. the roof is inclined to the radial main rod; 5. a roof radial main rod; 6. a horizontal strut; 7. a concrete floor; 8. embedding steel parts; 9. a hinged support; 10. connecting steel beams; 11. a wind cable is pulled; 12. a negative difference plate; 13. a limiting baffle; 14. temporary steel diagonal bracing; 15. interim geotechnological steel pipe support column.
Detailed Description
The present application is described in further detail below with reference to fig. 1-7.
Example 1:
the embodiment discloses a portal steel frame building structure is striden to height, and this portal steel frame building structure is striden to height cooperates the concrete structure installation to use, and concrete structure adopts the design of stepping back the platform layer upon layer. Referring to fig. 1 and 2, the high-low span portal steel frame building structure comprises a vertical wall 1, a plurality of tree-shaped support columns 2, at least one ridge ring beam 3, a plurality of roof inclined radial main rods 4 and a plurality of roof radial main rods 5, wherein the roof inclined radial main rods 4 and the roof radial main rods 5 are respectively distributed on two sides of the ridge ring beam 3, butt joint brackets 3a are arranged on two sides of the ridge ring beam 3 in advance, the upper ends of the roof inclined radial main rods 4 are connected to one side of the ridge ring beam 3 through the corresponding butt joint brackets 3a, and one end of each roof radial main rod 5 is connected to the other side of the ridge ring beam 3 through the corresponding butt joint bracket 3 a; the tree-shaped support columns 2 are positioned below the ridge ring beam 3 and the roof inclined radial main rod 4, and the upper ends of the tree-shaped support columns 2 are connected with the ridge ring beam 3 and/or the roof inclined radial main rod 4; the lower end of the roof inclined radial main rod 4 is connected to the vertical wall 1; a horizontal strut 6 is connected between two adjacent roof inclined radial main rods 4; the tree-shaped support columns 2 are also arranged below the roof radial main rods 5, and the roof radial main rods 5 are connected with the upper ends of the corresponding tree-shaped support columns 2; and a horizontal strut 6 is also connected between two adjacent roof radial main rods 5. The steel frame building structure is suitable for a structural system which has large space, high integrity requirement, high span, low span and light weight, and the light structural form of the steel frame building structure is simpler than the arrangement of truss structural rods; the tree-shaped support columns 2 at high and low ends are arranged, so that a larger space can be spanned, and the whole space effect is good. The inclined radial main rods 4 of the roof are connected through the horizontal supporting rods 6 to form an integral structure, and the shock resistance is superior; the steel members used in the whole steel frame building structure design are fewer in number, the assembly is simpler, the construction period is short, and the building cost is reduced.
Specifically, referring to fig. 3, the vertical wall 1 includes a plurality of vertically disposed door steel columns 1 a; all the door steel columns 1a are arranged at intervals, the upper ends of two adjacent door steel columns 1a are fixedly connected through connecting steel rods 1b, and the lower ends of the door steel columns 1a are fixedly connected on a concrete ground 7 through fixed hinged supports or elastic hinged supports; the vertical wall 1 adopts door steel columns 1a arranged at intervals to ensure the integral visual effect; can guarantee the reliable and stable nature of erecting wall 1 through setting up connection steel pole 1 b.
In the embodiment, the vertical wall 1 and the tree-shaped support columns 2 are both made of steel structures; the door steel column 1a and the ridge ring beam 3 are made of square steel pipes, and the tree-shaped support column 2 is made of round steel pipes; the horizontal strut 6 is a round steel pipe or a square steel pipe; the horizontal supporting rod 6 is fixedly connected with the inclined radial main rod 4 of the roof and the horizontal supporting rod 6 is fixedly connected with the radial main rod 5 of the roof by welding. Specifically, the welding process adopts full penetration split welding, the nodes and the main parts are controlled to be primary welding seams, and the rest parts are controlled to be secondary welding seams; the horizontal supporting rods 6 can ensure the coordinated deformation between the inclined radial main rods 4 of the roof and between the radial main rods 5 of the roof, and a common space stress system is formed, so that the combined roof stress system can bear pressure and tension, the overall stability is improved, meanwhile, the welding process is adopted to facilitate connection construction, and the connection firmness can be ensured, thereby ensuring the effective transmission of force and the indoor effect of a building; the shapes of the door steel column 1a and the ridge ring beam 3 are convenient for the surface of the door steel column to be attached to the outer skin of the building.
In the embodiment, the tree-shaped support columns 2 are distributed on floors (concrete retreating floors) with different elevations on a high-rise concrete ground 7, and the lower ends of the tree-shaped support columns 2 are fixedly connected to the concrete retreating floors through sliding hinged supports or elastic hinged supports or fixed hinged supports; the upper end of the tree-shaped support column 2 is connected with a ridge ring beam 3 and a roof inclined radial main rod 4 by pin roll nodes. By selecting a proper hinged support 9, the influence on the main structure can be controlled, and no more additional stress is generated.
Through economic analysis, in order to reduce the influence of the additional rigidity brought to the main body structure by the cross-layer large-span steel roof structure in the embodiment, as a preferable scheme: the lower end of the door steel column 1a is fixedly connected to the concrete ground 7 through a fixed hinge support, and the lower end of the tree-shaped support column 2 is fixedly connected to the high-rise concrete ground 7 through an elastic hinge support. Therefore, the influence of overlarge rigidity of the hinged support 9 caused by bending deformation of the upper steel structure can be effectively reduced, and meanwhile, the horizontal deformation of the hinged support is fixed, so that the influence on the indoor effect of the convection channel is reduced; arborescent support column 2 is located the eminence, adopts the elastic hinge support, both can release the influence that partial temperature stress brought for major structure, can guarantee again that whole horizontal displacement can not be too big, and the guarantee adapts to the deformation demand of upper portion curtain. Whole steel mesh structure overlayer setting in this embodiment, demand that vertical power and horizontal force can be born to arborescent support column 2, compromise frivolous effect simultaneously, arborescent support column 2 cooperates with vertical wall 1, both form a plurality of single pin height door-type steel frame construction with radial mobile jib 4 of ridge ring beam 3 and roofing slope, it is visible as many pin height door-type steel frame construction to link firmly the back through horizontal branch 6 between the radial mobile jib 4 of adjacent roofing slope, the atress characteristics of "roof" and "post" in traditional meaning are compromise simultaneously to this kind of component combination: the horizontal component bears bending moment and axial force (similar to an oblique column), and the vertical component bears axial force and can balance bending moment transmitted by the ridge ring beam 3; the building structure is guaranteed to form a large through-height space and simultaneously has enough stability and reliability.
The implementation principle of the embodiment of the application is as follows: the ridge ring beam 3, the roof radial main rod 5, the roof inclined radial main rod 4 and the horizontal strut 6 form a single-layer irregular steel grid structure, and a curtain wall enclosure structure can be wrapped on the steel grid structure, for example, a glass curtain wall or a metal curtain wall is installed. By adopting the technical scheme, a large through-height space is formed in the high-low span portal steel frame building structure room, and the requirement of use function is met; the finally installed bearing structure of the curtain wall enclosure structure is a steel grid structure formed by a ridge ring beam 3, a roof radial main rod 5, a roof inclined radial main rod 4 and a horizontal strut 6, one end of the steel grid structure is supported on a concrete structure roof by a tree-shaped support column 2, and the other end of the steel grid structure is supported by a vertical wall 1, so that the steel grid structure is excellent in earthquake resistance; the steel members used in the whole steel frame building structure design are fewer in number, the assembly is simpler, the construction period is short, and the building cost is reduced.
Owing to also be provided with arborescent support column 2 in the radial mobile jib of roof 5 below in this embodiment and be used for supporting the radial mobile jib of roof 5, can do the length dimension of the radial mobile jib of roof 5 bigger, thereby extend the space region of monomer building level to, increase building area and space volume, and simultaneously, can produce a horizontal pulling force to ridge ring beam 3 through the radial mobile jib of roof 5, it is balanced mutually to the side stress that ridge ring beam 3 produced with the radial mobile jib of roofing slope 4, reduce the horizontal pressure of the radial mobile jib of roofing slope 4 to erecting wall 1 production, improve overall structure's reliability and stability.
Example 2:
the embodiment discloses a construction process of a high-low span portal steel frame building structure, which is used for constructing the same or similar high-low span portal steel frame building structure in the embodiment 1, and referring to fig. 4, the construction process in the embodiment comprises the following steps:
s1, arranging a vertical wall 1 and a plurality of temporary geotechnical steel pipe supporting columns 15;
s2, installing the ridge ring beam 3 on the temporary geotechnical steel pipe support column 15 in a segmented manner;
s3, installing a radial main roof rod 5 and a radial main roof rod 4 on two sides of each section of ridge ring beam 3, wherein one end of the radial main roof rod 5 is fixedly connected to a butt-joint bracket 3a on one side of the ridge ring beam 3, one end of the radial main roof rod 4 is fixedly connected to a butt-joint bracket 3a on the other side of the ridge ring beam 3, and the other end of the radial main roof rod 4 is fixedly connected to the upper end of the vertical wall 1;
s4, horizontal struts 6 are arranged between the adjacent roof inclined radial main rods 4 and between the adjacent roof radial main rods 5;
s5, mounting a plurality of tree-shaped support columns 2 below the ridge ring beam 3 and the roof inclined radial main rod 4, wherein the upper ends of the tree-shaped support columns 2 are connected to the corresponding ridge ring beam 3 and the corresponding roof inclined radial main rod 4 through pin roll nodes;
and S6, unloading the temporary geotextile steel tube supporting column 15.
Further, in the embodiment, before formal construction, finite element analysis software MIDAS can be used for carrying out simulation analysis on the steel frame building structure, a component with larger stress in a calculation result is selected as a monitoring object, and a plurality of monitoring points are arranged; monitoring points are arranged at the same positions on two sides of the component, and stress change data monitored by the monitoring points are wirelessly transmitted to a terminal platform, so that 24-hour automatic monitoring is realized;
before the step S1, a concrete ground 7 and a concrete step-out floor which are matched with the high-low span portal steel frame building structure are required to be poured, and a plurality of steel embedded pieces 8 are pre-embedded during the pouring construction of the concrete ground 7 and the concrete step-out floor structure; before the vertical wall 1 is installed, a hinged support 9 for fixedly connecting the vertical wall 1 is installed on the corresponding steel embedded part 8; before the installation of the tree-shaped supporting column 2, a hinged support 9 for fixedly connecting the tree-shaped supporting column 2 is installed on the corresponding steel embedded part 8.
In the above step S1, as a preferable scheme, referring to fig. 5, when the vertical wall 1 is installed, the vertical wall 1 is first assembled and processed into an assembly unit on the ground by using the door steel column 1a and the connecting steel rod 1b, and then assembled, the lower end of the door steel column 1a is welded to the hinge support 9, and the upper end of the door steel column 1a can be fixed by using a wire rope cable wind or a temporary steel inclined strut.
In step S1, the temporary geotextile steel tube support column 15 is a standard member and has standard lengths of 6m, 5m, 4m, 3m, 2m, 1m, and 0.5 m; referring to fig. 6 and 7, the lower ends of the temporary geotechnical steel pipe support columns 15 are connected to the corresponding steel embedded parts 8 in a node mode through hexagonal bolt flange plates; the top of interim geotechnological steel pipe support column 15 sets up negative difference board 12 and limit baffle 13, and roof ridge ring roof beam 3 installs on negative difference board 12 and the lateral part of roof ridge ring roof beam 3 carries on spacingly through installing limit baffle 13. The temporary geotechnical steel pipe support columns 15 are positioned and installed according to building design drawings, and are not required to be cut by field measurement, so that the temporary geotechnical steel pipe support columns are convenient and direct to use, the engineering progress is accelerated, and the accuracy of the length dimension of each temporary geotechnical steel pipe support column 15 is ensured. Further, according to the difference of the supporting counter force of the temporary geotechnical steel pipe supporting columns 15, the concrete structure lower layer corresponding to the temporary geotechnical steel pipe supporting columns 15 with large stress needs to be jacked back for reinforcement.
Referring to fig. 6, as a scheme, a wind cable 11 is pulled at the upper end of each temporary geotechnical steel pipe support column 15; referring to fig. 7, as another scheme, the upper ends of two adjacent temporary geotextile steel tube support columns 15 are connected by pulling through a connecting steel beam 10. The stability of the temporary geotechnical steel pipe support column 15 in the construction process is ensured by pulling or arranging the connecting steel beam 10 for wind.
In the step S4, the horizontal struts 6 are fixedly connected to the roof inclined radial main bar 4 and the horizontal struts 6 are fixedly connected to the roof radial main bar 5 by welding; the welding is full penetration split welding. Therefore, the quick connection can be conveniently realized, the stable reliability of the connection can be ensured, and the appearance is attractive.
In the embodiment, the hinged support 9 for fixedly connecting the vertical wall 1 is a fixed hinged support or an elastic hinged support; the hinged support 9 for fixedly connecting the tree-shaped support column 2 is an elastic hinged support or a sliding hinged support; the elastic hinged support and the sliding hinged support are locked temporarily in the installation stage and are opened after the whole steel frame building structure is integrally formed. Therefore, the position change generated in the installation process can be effectively prevented, and the accurate reliability of the assembly of each component is ensured. In the embodiment, the hinged support 9 is installed by adopting a tower crane, the maximum weight of a single hinged support 9 is about 2 tons, and the hoisting capacity of the tower crane on site meets the hoisting requirement; and hoisting the hinged support 9 to be in place on the steel embedded part 8 by using a tower crane, positioning the hinged support 9 according to the positioning coordinate of the hinged support 9, and welding a welding seam between the hinged support 9 and the steel embedded part 8 after the hinged support 9 is positioned and confirmed to be correct.
Furthermore, in the present embodiment, in the assembly process of the elastic hinged support or the sliding hinged support with the corresponding component, a limitation measure is taken on the corner and the displacement of the hinged support 9, the temporary limiting steel plate is welded and fixed, after the whole steel frame building structure is assembled, the temporary limiting steel plate is cut off before the temporary geotechnical steel pipe support column 15 is unloaded, and the deformation capability of the corner and the displacement of the hinged support 9 is recovered, so that the design requirement is met.
After the scheme in the embodiment is tested and the temporary geotechnical steel pipe support column 15 is unloaded, the stress change value of each main component is within 10MPa and is smaller than the material strength design value and tends to be stable.
The implementation principle of the embodiment of the application is as follows: aiming at a large-span inclined free-form surface single-layer steel grid structure, a new construction technology is provided, which can be simply described as a mode of 'temporary geotechnical steel pipe support column 15 support, ridge ring beam 3 positioning and main rod reverse installation', in the construction process, the temporary geotechnical steel pipe support column 15 supports below the ridge ring beam 3, and no temporary support is arranged below the inclined radial main rod 4 of the roof; firstly, installing a ridge ring beam 3, dividing a roof radial main rod into a roof inclined radial main rod 4 and a roof radial main rod 5 by taking the ridge ring beam 3 as a boundary, and presetting butt joint brackets 3a on the ridge ring beam 3 for respectively positioning and installing the roof inclined radial main rod 4 and the roof radial main rod 5; the tree-shaped support column 2 is finally installed, so that before the whole building structure is formed in a connecting piece mode and the temporary geotechnical steel pipe support column 15 is unloaded, the pin shaft nodes among the tree-shaped support column 2, the ridge ring beam 3 and the roof inclined radial main rod 4 do not bear loads; by adopting the technical scheme, the construction process is optimized, and the movable roof inclined support is replaced by the fixed temporary geotechnical steel pipe support column 15, so that the problem of structural stability in the construction process is effectively solved; install earlier and originally be the ridge ring beam 3 of secondary beam, provide stable benchmark for the roof slope radial mobile jib 4 installation location as the girder, better assurance installation accuracy.
The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A high-low span portal steel frame building structure comprises a vertical wall (1) and a plurality of tree-shaped support columns (2), and is characterized by further comprising a ridge ring beam (3), a plurality of roof inclined radial main rods (4) and a plurality of roof radial main rods (5), wherein the roof inclined radial main rods (4) and the roof radial main rods (5) are respectively distributed on two sides of the ridge ring beam (3), and the upper ends of the roof inclined radial main rods (4) and one ends of the roof radial main rods (5) are connected to the ridge ring beam (3); the tree-shaped supporting columns (2) are positioned below the ridge ring beam (3) and the roof inclined radial main rod (4), and the upper ends of the tree-shaped supporting columns (2) are connected with the ridge ring beam (3) and/or the roof inclined radial main rod (4); the lower end of the roof inclined radial main rod (4) is connected to the vertical wall (1); and a horizontal strut (6) is also connected between the two adjacent roof inclined radial main rods (4).
2. The high-low span portal steel frame building structure according to claim 1, wherein the vertical wall (1) and the tree-shaped support columns (2) are made of steel structures; the tree-shaped support columns (2) are also arranged below the roof radial main rods (5), and the roof radial main rods (5) are connected with the upper ends of the corresponding tree-shaped support columns (2); and a horizontal strut (6) is also connected between every two adjacent roof radial main rods (5).
3. The high-low span door type steel frame building structure according to claim 1 or 2, wherein the vertical wall (1) comprises a plurality of vertically arranged door steel columns (1 a); all the door steel columns (1 a) are arranged at intervals, the upper ends of two adjacent door steel columns (1 a) are fixedly connected through connecting steel rods (1 b), and the lower ends of the door steel columns (1 a) are fixedly connected to a concrete ground (7) through fixed hinged supports or elastic hinged supports.
4. The high-low span portal steel frame building structure according to claim 1 or 2, wherein the lower ends of a plurality of tree-shaped supporting columns (2) are fixedly connected to floors at different elevations on a high-rise concrete ground (7) through sliding hinged supports or elastic hinged supports or fixed hinged supports respectively; the upper ends of the tree-shaped supporting columns (2) are connected with the corresponding ridge ring beam (3) or the corresponding roof inclined radial main rod (4) by pin roll joints.
5. The high-low span portal steel frame building structure according to claim 3, wherein the horizontal struts (6) are round steel pipes or square steel pipes; the horizontal supporting rods (6) are fixedly connected with the roof inclined radial main rod (4) and the horizontal supporting rods (6) are fixedly connected with the roof radial main rod (5) by welding;
the door steel column (1 a) and the ridge ring beam (3) are made of square steel tubes, and the tree-shaped support column (2) is made of round steel tubes.
6. A construction process of a high-low span portal steel frame building structure is characterized by comprising the following steps:
s1, arranging a vertical wall (1) and a plurality of temporary geotechnical steel pipe supporting columns (15);
s2, installing the ridge ring beam (3) on the temporary geotechnical steel pipe support column (15) in a segmented manner;
s3, installing a radial main roof rod (5) and a radial main roof rod (4) on two sides of each section of ridge ring beam (3) when the ridge ring beam is installed, wherein one end of the radial main roof rod (5) is fixedly connected to a butt joint bracket (3 a) on one side of the ridge ring beam (3), one end of the radial main roof rod (4) is fixedly connected to a butt joint bracket (3 a) on the other side of the ridge ring beam (3), and the other end of the radial main roof rod (4) is fixedly connected to the upper end of the vertical wall (1);
s4, horizontal struts (6) are arranged between the adjacent roof inclined radial main rods (4) and between the adjacent roof radial main rods (5);
s5, installing a plurality of tree-shaped supporting columns (2) below the ridge ring beam (3) and the roof inclined radial main rod (4), wherein the upper ends of the tree-shaped supporting columns (2) are connected to the corresponding ridge ring beam (3) and the corresponding roof inclined radial main rod (4) through pin roll nodes;
and S6, unloading the temporary geotextile steel tube supporting column (15).
7. The construction process of the high-low span portal steel frame building structure according to claim 6, wherein before the step S1, a concrete ground (7) and a concrete step-down floor matched with the high-low span portal steel frame building structure are required to be poured, and a plurality of steel embedded pieces (8) are embedded during the pouring construction of the concrete ground (7) and the concrete step-down floor structure;
before the vertical wall (1) is installed, a hinged support (9) for fixedly connecting the vertical wall (1) is installed on the corresponding steel embedded part (8); before the installation of the tree-shaped supporting column (2), a hinged support (9) for fixedly connecting the tree-shaped supporting column (2) is installed on the corresponding steel embedded part (8).
8. The construction process of the high-low span portal steel frame building structure according to claim 7, wherein in the step S1, the temporary geotextile steel tube support columns (15) are standard members and have standard lengths of 6m, 5m, 4m, 3m, 2m, 1m and 0.5 m; the lower end of the temporary geotechnical steel pipe support column (15) is in node joint with the corresponding steel embedded part (8) by adopting a hexagonal bolt flange plate;
the upper ends of two adjacent temporary geotechnical steel pipe supporting columns (15) are connected by adopting a connecting steel beam (10) in a pulling mode, or the upper end of each temporary geotechnical steel pipe supporting column (15) is provided with a wind cable (11) in a pulling mode;
the top end of the temporary geotechnical steel pipe support column (15) is provided with a negative difference plate (12) and a limiting baffle (13), the ridge ring beam (3) is installed on the negative difference plate (12) and the side part of the ridge ring beam (3) is limited through the installation of the limiting baffle (13).
9. The construction process of the high-low span door type steel frame building structure according to claim 6, 7 or 8, wherein in the step S4, the horizontal struts (6) are fixedly connected with the roof inclined radial main bar (4) and the horizontal struts (6) are fixedly connected with the roof radial main bar (5) by welding; the welding is full penetration split welding.
10. The construction process of the high-low span portal steel frame building structure according to claim 7 or 8, wherein the hinged support (9) for fixedly connecting the vertical wall (1) is a fixed hinged support or an elastic hinged support; the hinged support (9) for fixedly connecting the tree-shaped support column (2) is an elastic hinged support or a sliding hinged support; the elastic hinged support and the sliding hinged support are locked temporarily in the installation stage and are opened after the whole steel frame building structure is integrally formed.
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| CN114837483B (en) | 2023-04-28 |
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