CN219261345U - Large-span building structure of tensioning integral cable system - Google Patents
Large-span building structure of tensioning integral cable system Download PDFInfo
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- CN219261345U CN219261345U CN202223593484.4U CN202223593484U CN219261345U CN 219261345 U CN219261345 U CN 219261345U CN 202223593484 U CN202223593484 U CN 202223593484U CN 219261345 U CN219261345 U CN 219261345U
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Abstract
The utility model relates to a large-span building structure of a tensioning integral rope system, and belongs to the technical field of space structures in civil engineering. In order to solve the problems, the utility model provides a cable-rod system large-span building structure, which comprises a roof and double-layer stretching integral columns, wherein the center of the top of the roof is a regular polygon rigid roof winding grid unit; the regular polygon rigid roof upper chord grid unit takes a plurality of central radiation beam strings as a roof framework; the double-layer roof cable nets are stretched among the regular polygon rigid roof upper chord grid unit, the plurality of adjacent central radiation beam strings and the prestress beam string ring; the circumferential boundary part of the roof is a prestress tension string ring beam, and the prestress tension string ring beam is connected with a plurality of central radiation tension string beams; the double-layer stretching whole column is used as a vertical supporting component of the roof to support a roof system. The utility model has stable structure, good shock resistance and shock absorption and convenient installation during construction.
Description
Technical Field
The utility model relates to a large-span building structure of a tensioning integral rope system, and belongs to the technical field of space structures in civil engineering.
Background
In the background of the new era, the demands of society on large-space public buildings such as gymnasiums and conference museums are obviously changed from simple building modeling characteristics to combination of attractiveness and economy, which means that the design requirements of the public buildings are changed from the development to a larger span to pursue the characteristics of large span, and meanwhile, the material performance, space resources and the like can be effectively utilized.
Under the transformation trend, various novel large-span house steel structure systems combining the prestress technology, such as beam string, cable dome and string branch dome, are widely applied, and a self-balancing system is formed by flexible inhaul cables and rigid rod member frameworks, so that the advantages of the two materials are exerted.
However, the existing cable-rod large-span system has the following defects: (1) The traditional cable system is a roof system formed by cable rods, and the upright post for supporting the roof is still a rigid structure with huge steel consumption, such as a lattice type steel upright post or a lattice type steel tube concrete column. These vertical support members are large in cross section, making space resource utilization low; and the construction material consumption is large, the construction is complex, and the construction cost is increased. (2) The traditional cable rod system is not a full-tensioning integral structure system in fact, and can cause excessive rigidity and insufficient flexibility, so that when severe wind vibration and earthquake occur, the elastic deformation of the prestressed cable is difficult to consume energy and absorb shock, and the deformation returns after the severe power load is unloaded; larger secondary stresses are generated when uneven foundation settlement and significant temperature distribution are encountered.
Disclosure of Invention
In order to solve the problems, the utility model provides a large-span building structure of a tension integral rope system, which comprises a roof and double-layer tension integral columns 3, wherein the top center of the roof is a regular polygon rigid roof upper chord grid unit 1;
the roof takes a plurality of central radiation beam strings 2 which are distributed outwards in a radiation mode by regular polygon rigid roof upper chord grid units 1 as a roof framework.
The double-layer roof cable nets 5 are stretched among the regular polygon rigid roof upper chord grid unit 1, the plurality of adjacent central radiation beam strings 2 and the prestress beam string ring 4;
the circumferential boundary part of the roof is a prestress tension string ring beam 4, and the prestress tension string ring beam 4 is connected with a plurality of central radiation tension string beams 2;
the double layer tensile monolithic column 3 acts as a vertical support member for the roof, supporting the roof system and transmitting the upper load to the foundation.
In one embodiment of the utility model, the cross section of the prestress tension ring beam 4 is triangular and consists of three circumferential prestress ropes 17, including an upper chord prestress rope, a lower chord inner prestress rope and a lower chord outer prestress rope; a plurality of triangular closed supports 16 formed by three rigid short supporting rods are equidistantly arranged among the upper chord prestressed cable, the lower chord inner side prestressed cable and the lower chord outer side prestressed cable; the prestress tension string ring beam 4 serves as a circumferential boundary of a roof system, is convenient for tensioning a cable network, and can serve as a lateral support of the double-layer tension integral column 3 to improve stability of the double-layer tension integral column 3.
In one embodiment of the present utility model, the cross section of the central radiating beam string 2 is an inverted triangle, and comprises a beam string upper string 7, a beam string lower string 8 and inclined struts 9 which are formed by multi-limb round steel pipes, wherein the cross sections at every other distance are closed and connected by three inclined struts 9, the inclined struts 9 can be made of round steel pipes, and can be made of hot rolled angle steel when the length and the stress of the rods are small, and the beam string is designed according to a pressure-bearing member with two hinged axle centers.
In one embodiment of the present utility model, the double-layer roof cable net 5 includes an upper cable net and a lower cable net, where the upper cable net is stretched between polygonal corner points of the regular polygon rigid roof upper chord grid unit 1, the adjacent central radial beam string 7 and the upper string prestressed cable of the prestressed beam ring 4; the lower cable net is stretched between the lower string 8 of the string beam of the central radiation string beam 2 and the inner side prestressed cable of the lower string of the prestressed string ring beam 4; the upper cable net and the lower cable net are connected by a plurality of cable net supporting rods 6, and are used for ensuring the cable net shape and improving the rigidity of the cable net system.
In one embodiment of the present utility model, the double-layer stretching integral column 3 is formed by connecting an upper layer four-stage stretching integral unit and a lower layer four-stage stretching integral unit, wherein the upper layer four-stage stretching integral unit comprises:
the top and the bottom are rectangular planes formed by four horizontal cables 11, and the two rectangular planes are parallel and staggered by 45 degrees and are connected by four inclined elevation cables 12, four compression bars 10 and four elevation auxiliary cables 14;
the lower-layer fourth-order stretching integral unit and the upper-layer fourth-order stretching integral unit have the same structure, the overall size of the lower-layer fourth-order stretching integral unit is smaller than that of the upper-layer fourth-order stretching integral unit, and the top surface of the lower-layer fourth-order stretching integral unit is connected with the bottom surface of the upper-layer fourth-order stretching integral unit and is matched with the bottom surface of the upper-layer fourth-order stretching integral unit in size;
the bottom surface of the upper layer four-stage stretching integral unit is provided with a cross auxiliary rope 15 and stretched at the diagonal line of the rectangular plane; the bottom surface of the upper layer four-stage stretching integral unit and the top surface of the lower layer four-stage stretching integral unit are removed with horizontal ropes 11, and are sequentially connected by annular connecting ropes 13.
In one embodiment of the present utility model, the compression bar 10 is preferably not in direct contact in space, and may be designed as a compression member with two hinged axes, and may be made of a round steel pipe or a rectangular steel pipe.
In one embodiment of the present utility model, preferably, the three circumferential prestressed cables 17, the double-layer roof cable net 5, and the horizontal cable 11, the vertical cable 12, the circumferential connecting cable 13, the vertical auxiliary cable 14, and the cross auxiliary cable 15 in the central radiating beam string 2, the prestressed ring beam 4 are all flexible cables, and may be made of steel strands, steel wire bundles, or steel cables composed of high-strength steel wires.
The utility model has the beneficial effects that:
1. the utility model is a large span roof integral structure composed of regular polygon rigid roof upper chord grid unit, central radiation beam string and double-layer roof cable net, which can realize larger crossing ability and lay various roofing materials on the roof; the double-layer roof cable net is stretched among the regular polygon rigid roof upper chord grid unit, the central radiation beam string and the prestress beam string ring to form a large-span roof, and a large number of inhaul cables can be utilized to reduce steel consumption and reduce the dead weight of the roof structure; meanwhile, wind vibration and earthquake response can be effectively reduced by utilizing the elastic deformation of the inhaul cable.
2. The vertical support piece adopts the double-layer tensioning integral column, and the compression bar and the inhaul cable in the double-layer tensioning integral column can be respectively designed according to the axle center compression member and the axle center tension member, so that the stress distribution is uniform, the stress performance of the two materials is fully exerted, and the double-layer tensioning integral column is more economical; eight compression bars of a single column are discretely distributed in a continuous guy cable, the internal compression bars are not in direct contact in space, energy and shock can be consumed through elastic deformation when wind vibration and earthquake load are born, and the deformation can be recovered after unloading; meanwhile, the secondary stress of the structure caused by construction errors, uneven settlement of the foundation and the like can be reduced.
3. The prestress tension string ring beam is arranged, so that on one hand, the prestress tension string ring beam is used as the circumferential boundary construction of a roof, and tension cable nets are facilitated; on the other hand, the double-layer stretching monolithic column can be used as a column lateral support, so that the stability of the double-layer stretching monolithic column is improved; and the components can be prefabricated in a factory, and are connected in a field tensioning manner, so that the construction efficiency is high.
4. The utility model is provided with a plurality of triangular closed supports with equal intervals to maintain the intervals of three circumferential prestressed cables and improve the integral bending resistance and torsional rigidity of the section.
5. The cross section of the central radiation beam string is inverted triangle, and comprises an upper beam string, a lower beam string and an inclined strut, wherein the upper beam string, the lower beam string and the inclined strut are formed by multi-limb round steel pipes, so that the framework of the roof is stable and reliable, and the double-layer cable net is convenient to connect.
6. The cable net support rods are supported between the upper cable net grid junction points and the lower cable net grid junction points of the cable net of the double-layer roof, so that the cable net shape is ensured, and the rigidity of the cable net system is improved.
7. The bottom of the upper layer four-stage stretching integral unit of the double-layer stretching integral column is provided with two diagonal stretching cross auxiliary cables, and the lower layer four-stage stretching integral unit is connected by adopting a circumferential connecting cable, so that the horizontal displacement of the rod ends of the upper and lower two-layer compression rods at the middle position of the height of the column is effectively restrained, the outline form of the double-layer stretching integral column is ensured, and the space integral rigidity of the double-layer stretching integral column is improved.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present utility model.
Fig. 2 is an overall top view of one embodiment of the present utility model.
FIG. 3 is a schematic front view of a single center radiating beam string connected double-deck tensile monolithic column in accordance with one embodiment of the present utility model.
FIG. 4 is a schematic side view of a single center radial beam string connected double-deck tensile monolithic column in one embodiment of the present utility model.
Fig. 5 is a schematic structural diagram of an upper layer four-stage tensegrity unit according to an embodiment of the present utility model.
FIG. 6 is a schematic diagram of the overall structure of a double layer tensile monolithic column in accordance with one embodiment of the present utility model.
FIG. 7 is a side view of the overall structure of a double layer tensile monolithic column in one embodiment of the present utility model.
FIG. 8 is a top view of the overall structure of a double layer tensile monolithic column in one embodiment of the present utility model.
Wherein, the 1-regular polygon rigid roof is provided with a chord grid unit; 2-a central radial beam string; 3-double layer stretching the whole column; 4-prestress string ring beam; 5-double-layer roof cable net; 6-cable net brace bars; 7-stringing the chord beam; 8-lower chords of chord girders; 9-diagonal bracing; 10-pressing rods; 11-horizontal cable; 12-elevation cable; 13-a circumferential connecting cable; 14-a vertical auxiliary rope; 15-a cross-shaped auxiliary rope; 16-triangular closing support; 17-circumferential prestressing cables.
Detailed Description
Example 1
As shown in fig. 1 and 2, the utility model provides a large-span building structure of a tension whole cable system, which comprises a roof and a double-layer tension whole column 3, wherein the top center of the roof is a regular polygon rigid roof upper chord grid unit 1, the geometric center of a horizontal projection plane of the roof is the geometric center of the roof, the outline of the roof is regular polygon, the inside of the roof is composed of regular triangles, the grid units are all round steel pipes and can be connected by adopting welding ball nodes or directly intersecting welding, and the grid units cannot be connected by adopting bolt ball nodes to ensure the space stability.
As shown in fig. 1 and 2, a plurality of the central radiation beam strings 2 extend from the edge of the regular polygon rigid roof upper chord grid unit 1 along the diameter direction;
the circumferential boundary part of the roof is a prestress beam ring 4 and is connected with a plurality of central radiation beam strings 2; the section of the prestress tension string ring beam 4 is triangular and consists of three circumferential prestress cables 17, and the prestress tension string ring beam 4 comprises an upper chord prestress cable, a lower chord inner prestress cable and a lower chord outer prestress cable; a plurality of triangular closed supports 16 formed by three rigid short supporting rods are equidistantly arranged among the upper chord prestressed cable, the lower chord inner side prestressed cable and the lower chord outer side prestressed cable;
the prestress tension ring beam 4 is tensioned between the adjacent double-layer tensioning integral column 3 and the connecting node of the central radiation tension string beam 2.
As shown in fig. 3 and 4, the central radiation beam string 2 adopts an inverted triangle section form, the section is an inverted triangle, and the beam string comprises a beam string upper string 7, a beam string lower string 8 and an inclined strut 9, which are formed by multi-limb round steel pipes; the sections at every other distance are closed and connected by three inclined stay bars 9, the inclined stay bars 9 can be made of round steel tubes, and can be made of hot rolled angle steel when the length and the stress of the rods are small, and the design is designed according to a pressure-bearing component with two hinged axes.
As shown in fig. 1, 2, 3 and 4, the double-layer roof cable net 5 comprises an upper cable net and a lower cable net, and a plurality of upper cable nets are stretched between polygonal corner points of the regular polygon rigid roof upper chord grid unit 1, the adjacent central radiation beam string 7 and the upper string prestress cable of the prestress beam ring 4; the lower cable nets are stretched between the lower chords 8 of the central radial beam string 2 and the inner prestress cables of the lower chords of the prestress beam string ring 4; the upper cable net and the lower cable net are connected by a plurality of cable net supporting rods 6, and are used for ensuring the cable net shape and improving the rigidity of the cable net system.
As shown in fig. 5, 6, 7 and 8, the double layer tensile monolithic column 3 acts as a vertical support for the roof, supporting the roof system and transmitting the upper load to the foundation.
The double-layer stretching integral column 3 is formed by connecting an upper layer four-stage stretching integral unit and a lower layer four-stage stretching integral unit, and the upper layer four-stage stretching integral unit and the lower layer four-stage stretching integral unit have the same structure:
the top and the bottom are rectangular planes formed by sequentially connecting four horizontal ropes 11, and the two rectangular planes are parallel and staggered by 45 degrees;
each unit comprises four discrete compression bars 10, the bottoms of the four discrete compression bars are positioned at four corner points of a rectangular plane of the bottom, the tops of the four discrete compression bars uniformly deflect 45 degrees clockwise, and four elevation cables 12 are obliquely tensioned in elevation between four points of the rectangular plane of the top and four points of the rectangular plane of the bottom;
the overall size of the lower-layer fourth-order stretching integral unit is smaller than that of the upper-layer fourth-order stretching integral unit, and the top surface of the lower-layer fourth-order stretching integral unit is connected with the bottom surface of the upper-layer fourth-order stretching integral unit and is matched with the bottom surface of the upper-layer fourth-order stretching integral unit in size;
the bottom surface of the upper layer four-stage stretching integral unit is provided with a cross auxiliary rope 15 and stretched at the diagonal line of the rectangular plane; the bottom surface of the upper-layer fourth-order stretching integral unit and the top surface of the lower-layer fourth-order stretching integral unit are removed with horizontal ropes 11, and are sequentially connected by annular connecting ropes 13;
in addition, four vertical auxiliary ropes 14 are arranged between the upper vertical surface and the lower vertical surface for auxiliary connection.
As shown in fig. 1 and 2, the top of the compression bar 10 of the upper-layer four-stage tension integral unit is hinged with the upper chord 7 of the central radiation beam 2, and the bottom of the compression bar 10 of the lower-layer four-stage tension integral unit is hinged and anchored with the ground foundation to transfer the upper load to the ground foundation.
Example 2
The utility model is applied to the actual engineering design construction process:
the basic steps are as follows:
the design stage:
1) Firstly, the shape and the size of a regular polygon rigid roof upper chord grid unit 1 in the center of the roof and the whole radius of the roof are preliminarily determined according to the building modeling, functions and structural bearing requirements, so that the number and the span of the central radiation beam string 2, the number and the span of the prestressed beam string ring 4 and the number and the column spacing of the double-layer stretching whole columns 3 are determined.
2) The roof material is selected, the spacing of the members on the chord of the roof is preliminarily determined according to the spanning capacity of the roof, the member materials and the section sizes of the regular polygon rigid roof chord grid unit 1, the central radiation beam string 2 and the prestress beam string ring 4 in the center of the roof are preliminarily designed according to the size and the distribution of the vertical load, and meanwhile, the material, the length and the section size of the triangular closed support 16 with the equidistant middle of the beam string ring are preliminarily determined.
3) And determining the arrangement position and the interval of the double-deck roof cable net 5 according to the shape and the radius of the regular polygon rigid roof upper chord grid unit 1 in the center of the roof, the number of the central radiation beam string 2 and the like. According to the dead weight of the roofing material and the maximum live load of the roofing, the cable net area between any adjacent central radiation beam strings 2 is selected as the stress calculation representative by considering the cable system strength and the allowable deformation value of the cable net, and the upper and lower cable net materials, the section size, the length, the material and the section size of the short stay bars are preliminarily designed.
4) The design height of the double-layer tensioning whole column 3 is preliminarily determined according to the requirements of the whole structure on the height, and therefore the lengths of the horizontal cable 11, the vertical cable 12, the circumferential connecting cable 13, the vertical auxiliary cable 14, the cross auxiliary cable 15 and the compression bar 10 are preliminarily determined. According to the result of the preliminary design of the roof, calculating the vertical load downwards transmitted to the lower layer double-layer tensioning integral column 3 by the roof, and designing each inhaul cable and each compression bar in the double-layer tensioning integral column 3 according to the axial tension and the axial compression components respectively, wherein the materials, the section forms and the section sizes of the components are initially selected.
5) Establishing a structural system integral stress analysis model, and adjusting and determining structural design schemes of main components such as a regular polygon rigid roof upper chord grid unit 1, a central radiation beam string 2, a prestress beam string ring 4, a double-layer roof cable net 5, cable net inter-stay bars 6, a double-layer tensioning integral column 3 and the like according to checking calculation of strength, rigidity and stability under various load working condition combinations; the structural design scheme comprises the arrangement form, the material and the section size of each component; and determining the tensioning prestress of each cable.
6) And finally, the reasonable configuration, the structural design scheme for optimizing all parts and the tensioning prestress value of the cable system, which are required to be realized after the construction of the system, are all required to repeatedly execute checking calculation and structural design adjustment of the bearing capacity limit state and the normal use limit state of the whole structural system under various possible load working condition combinations until the design result is safe, reliable, economical and reasonable.
And (3) construction stage:
firstly, prefabricating a compression bar 10 in a double-layer tensioning integral column 3 in a factory, overlapping and tensioning a horizontal cable 11, a vertical cable 12, a circumferential connecting cable 13, a vertical auxiliary cable 14 and a cross auxiliary cable 15 in the column at a site design position of a construction site to obtain the double-layer tensioning integral column 3 and stably fixing the double-layer tensioning integral column on a foundation; and simultaneously welding the factory prefabricated regular polygon rigid roof upper chord grid unit 1 and the beam upper chord 7 of the central radiation beam 2 on site, jacking or lifting to the required height, and connecting the beam upper chord 7 with the double-layer tensioning integral column 3.
And secondly, stretching a beam lower chord 8 prestress inhaul cable of the central radiation beam 2 from the bottom edge of the regular polygon rigid roof upper chord grid unit 1.
And thirdly, connecting and installing pre-tightening string ring beams 4 between adjacent double-layer tensioning integral columns 3, and installing equidistant pre-fabricated triangular closed supports 16 between circumferential pre-stressing cables 17 of each pre-tightening string ring beam 4 according to a design drawing.
And fourthly, connecting and tensioning the double-layer roof cable net 5, and installing prefabricated cable net spacer rods 6 at required positions.
Fifthly, adjusting the cable force of each cable of the roof to enable the upper cable net to reach the expected position and shape.
And sixthly, paving the roofing material.
While the utility model has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The large-span building structure of the tension whole cable-rod system is characterized by comprising a roof and double-layer tension whole columns (3), wherein the center of the top of the roof is a regular polygon rigid roof upper chord grid unit (1);
the roof takes a plurality of central radiation beam strings (2) which are outwards distributed in a radiation mode by regular polygon rigid roof upper chord grid units (1) as a roof framework;
a plurality of double-layer roof cable nets (5) are stretched among the regular polygon rigid roof upper chord grid unit (1), a plurality of adjacent central radiation beam strings (2) and a prestress beam string ring (4);
the circumferential boundary part of the roof is a prestress tension string ring beam (4), and the prestress tension string ring beam (4) is connected with a plurality of central radiation tension string beams (2);
the double-deck tensile monolithic column (3) acts as a vertical support member for the roof.
2. A large span building structure of a tension whole cable system according to claim 1, characterized in that the section of the prestressed tension string ring beam (4) is triangle, which is composed of three circular prestressed cables (17), the prestressed tension string ring beam (4) comprises an upper chord prestressed cable, a lower chord inner prestressed cable and a lower chord outer prestressed cable.
3. A large span building structure of a tension integrated cable system according to claim 2, characterized in that a plurality of triangular closing supports (16) of three rigid short struts are arranged equidistantly between the upper chord pre-stressing cable, the lower chord inner pre-stressing cable and the lower chord outer pre-stressing cable.
4. A tension-integrated cable-rod system large-span building structure according to claim 1, wherein the cross section of the central radiation beam string (2) is inverted triangle, comprising a beam string upper string (7), a beam string lower string (8) and a diagonal brace (9) which are formed by multi-limb round steel pipes.
5. A tension-integrated cable-rod system large-span building structure according to claim 1, wherein the double-layer roof cable net (5) comprises an upper cable net and a lower cable net, and the upper cable net is tensioned among polygonal angular points of the regular polygon rigid roof upper chord grid unit (1), upper chords (7) of adjacent central radiation beam-string beams and upper chord prestress cables of the prestress beam-string ring (4); the lower cable net is stretched between a lower string (8) of the string beam of the central radiation string beam (2) and a lower string inner side prestressed cable of the prestressed string ring beam (4).
6. A tension-type, unitary cable-tie, large-span building structure according to claim 5, wherein said upper and lower cable nets are connected by a plurality of inter-net struts (6).
7. A tension-type large-span building structure of a system of rope as recited in claim 1, wherein the double-deck tension-type monolithic column (3) is formed by connecting an upper-layer fourth-order tension-type monolithic unit and a lower-layer fourth-order tension-type monolithic unit, the upper-layer fourth-order tension-type monolithic unit comprising:
the top and the bottom are rectangular planes formed by four horizontal cables (11), and the two rectangular planes are parallel and staggered by 45 degrees and are connected by four inclined elevation cables (12), four compression bars (10) and four elevation auxiliary cables (14);
the lower-layer fourth-order stretching integral unit and the upper-layer fourth-order stretching integral unit have the same structure, and the top surface of the lower-layer fourth-order stretching integral unit is connected with the bottom surface of the upper-layer fourth-order stretching integral unit and is matched in size.
8. The large-span building structure of a tension-integrated cable system according to claim 7, wherein the bottom surface of the upper layer four-stage tension-integrated unit is provided with a cross-shaped auxiliary cable (15) and is stretched at the diagonal line of the rectangular plane.
9. A tension-type large span building structure of the rope system as claimed in claim 7, characterized in that the compression bar (10) is a round steel tube or a rectangular steel tube.
10. A large span building structure of a tension integral rope system according to claim 7, characterized in that the bottom surface of the upper layer four-stage tension integral unit and the top surface of the lower layer four-stage tension integral unit are connected in sequence by a circumferential connecting rope (13).
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