CN214246315U - Large-span trapezoidal space steel pipe truss concrete floor structure - Google Patents
Large-span trapezoidal space steel pipe truss concrete floor structure Download PDFInfo
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- CN214246315U CN214246315U CN202023224404.9U CN202023224404U CN214246315U CN 214246315 U CN214246315 U CN 214246315U CN 202023224404 U CN202023224404 U CN 202023224404U CN 214246315 U CN214246315 U CN 214246315U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 102
- 239000010959 steel Substances 0.000 title claims abstract description 102
- 238000003466 welding Methods 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 230000035515 penetration Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Abstract
A large-span trapezoidal space steel pipe truss concrete floor structure comprises a concrete floor slab and a large-span trapezoidal space steel pipe truss, wherein the concrete floor slab directly bearing floor load is arranged on a T-shaped support of upper chords of three pipes of the large-span trapezoidal space steel pipe truss; the basic unit of the large-span trapezoidal space steel pipe truss is a internode, each internode consists of three pipe upper chords, two pipe lower chords, a quadrangular pyramid diagonal web member, an upper chord horizontal rod and a lower chord horizontal rod, and the cross section of the basic unit is in a shape of an inverted trapezoid in triangular arrangement; the large-span trapezoidal space steel pipe truss is connected by adopting the penetration of steel pipe direct welding nodes; the concrete floor adopts an assembled precast slab or a steel-concrete composite floor. The utility model discloses rational in infrastructure, simple structure, biography power are clear and definite, simple to operate, do not set up the plane secondary truss of floor secondary beam and space truss, little, the rigidity is big with the steel volume, bear the weight of the dynamic height, and the leap over ability is strong, the comfort level is good, mechanical properties is superior.
Description
Technical Field
The utility model belongs to the civil engineering field, concretely relates to trapezoidal space steel pipe truss concrete floor structure of large-span.
Background
In recent years, public buildings of large-span roofs, such as stadiums, exhibition centers, theaters, industrial plants, and the like, are becoming more and more widespread. The roof structure form of this kind of building is various, includes: the roof enclosure structure mainly adopts a light metal roof or a membrane material, and is not considered by a roof. However, for the people going upstairs and the roof, the light roof can not meet the requirements of bearing capacity and rigidity due to large live load, and therefore a concrete floor is required to be used for replacement. Meanwhile, the constant load and the live load of the concrete floor are remarkably increased, so that the structural form is difficult to meet the mechanical property and poor in economical efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the problem among the above-mentioned prior art, a trapezoidal space steel pipe truss concrete floor structure of large-span is provided, it is abundant to have the building posture, the molding is light and handy, the pipeline of being convenient for passes through advantage to rational in infrastructure, simple structure, pass power clearly and definitely, simple to operate, do not set up the plane secondary truss of floor secondary beam and space truss, overall structure with little, rigidity is big, bear the dynamic height, the leap over can the reinforce, the comfort level is good, mechanical properties is superior.
In order to achieve the above object, the utility model provides a trapezoidal space steel pipe truss concrete floor structure of large-span has following technical scheme: the concrete floor directly bearing floor load is arranged on the T-shaped supports of the upper chords of the three pipes of the trapezoidal space steel pipe truss; the basic unit of the large-span trapezoidal space steel pipe truss is a internode, and each internode consists of a three-pipe upper chord member, a two-pipe lower chord member, a quadrangular pyramid inclined web member, an upper chord horizontal member and a lower chord horizontal member; the cross section of the basic unit is in a shape of an inverted trapezoid in triangular arrangement; the large span is formed by splicing a plurality of basic units of the trapezoidal space steel pipe truss; the three-pipe upper chord and the two-pipe lower chord of the large-span trapezoidal space steel pipe truss are main pipes; the quadrangular pyramid diagonal web member, the upper chord horizontal rod and the lower chord horizontal rod are branch pipes; the large-span trapezoidal space steel pipe truss is connected by adopting the penetration of steel pipe direct welding nodes; the concrete floor is an assembled precast slab or a steel-concrete composite floor; the concrete floor slab is connected with the large-span trapezoidal space steel pipe truss through a T-shaped support and a shear key of a stud.
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the large-span trapezoidal space steel pipe truss is in the form of a parallel chord truss, a trapezoidal truss, a variable height curved truss or an arch truss.
As a preferred scheme of the large-span trapezoidal space steel tube truss concrete floor structure, the rod pieces of the basic units are all round steel tubes, and the types of the steel tubes are rolled or welded; the ratio of the outer diameter to the wall thickness of the pressure-bearing rod piece of the large-span trapezoidal space steel pipe truss is not more than
εkIs a steel grade correction coefficient.
As the preferable scheme of the large-span trapezoidal space steel tube truss concrete floor structure, the node center distance S of which the calculated length is 0.9 times in and out of the plane of the three-tube upper chord member and the two-tube lower chord memberj0，j01, 2, and 0.9Sj0Checking the stability of the pressure rod according to a lattice type; the node center distance S with the length of 0.8 times calculated in the plane and out of the plane of the quadrangular pyramid diagonal web member, the upper chord horizontal rod and the lower chord horizontal rodj1，j1＝3、4、5。
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the external dimension of the main pipe is not less than the external dimension of the branch pipe, the wall thickness of the main pipe is not less than the wall thickness of the branch pipe, and the branch pipe cannot be inserted into the main pipe at the joint of the branch pipe and the main pipe; the included angle between the main pipe and the branch pipe or the axis of the branch pipe is not less than 30 degrees; the end part of the branch pipe of the large-span trapezoidal space steel pipe truss is cut by an automatic pipe cutting machine, and a groove is not cut when the wall thickness of the branch pipe is smaller than 6 mm.
As a preferred scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the eccentricity at the connecting node of the branch pipe and the main pipe of the large-span trapezoidal space steel pipe truss is not more than-0.55 and not more than e/D and not more than 0.25, the influence of the eccentric bending moment is considered on the pressurized main pipe, the influence on the tensioned main pipe and the node can be ignored, the eccentric bending moment M is Δ N · e, e is the eccentricity, D is the outer diameter (mm) of the circular pipe main pipe, and Δ N is the difference value of the axial forces of the main pipes on the two sides.
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the branch pipes of the large-span trapezoidal space steel pipe truss adopt K-shaped nodes with gaps and overlapped K-shaped nodes, the gap between adjacent branch pipes welded on the surface of the main pipe is not less than 2 times of the wall thickness of the two branch pipes, and the peripheral welding seam of the overlapped branch pipe is 2 times of the wall thickness of the branch pipe.
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the connecting weld of the branch pipe and the main pipe is continuously welded along the whole circumference and is in smooth transition, the weld adopts fillet weld along the whole circumference, or adopts butt weld partially, or adopts fillet weld partially, or adopts butt weld or fillet weld with groove for the area where the included angle between the pipe wall of the branch pipe and the pipe wall of the main pipe is more than or equal to 120 degrees, the size of the welding leg of the fillet weld is not more than 2 times of the wall thickness of the branch pipe, and the peripheral weld of the lapped branch pipe is 2 times of the wall thickness of the branch pipe; the large-span trapezoidal space steel pipe truss of the direct welding joint, the plane K-shaped joint of the branch pipe lap joint and the lap joint rate of the large-span trapezoidal space steel pipe truss meet the condition that eta is more than or equal to 25%ovLess than or equal to 100 percent, and ensures that the continuous welding seam between the overlapped branch pipes can reliably transmit the internal force.
As the preferred scheme of above-mentioned trapezoidal space steel pipe truss concrete superstructure structure of large-span, when the branch pipe external dimension of overlap joint is different each other, the less overlap joint of external dimension is on the bigger person of size, when the branch pipe wall thickness is different, the less wall thickness person overlap joint is on the great wall thickness person, and bears the branch pipe of axle center pressure in the below.
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, when the node can not meet the bearing capacity requirement, a transverse stiffening plate is arranged in the main pipe or a method of sticking the stiffening plate on the surface of the main pipe is adopted for reinforcement.
As a preferable scheme of the concrete floor system structure with the large-span trapezoidal space steel pipe truss, the T-shaped support bracket is welded on three upper chords of the large-span trapezoidal space steel pipe truss, and a supporting surface of the T-shaped support bracket is parallel to the bottom of the concrete plate.
As the preferable scheme of the large-span trapezoidal space steel tube truss concrete floor structure, the stud shear keys are vertically arranged with the supporting surfaces of the T-shaped supports; the diameter of the stud shear key is not less than 16mm, and the length and the distance are not less than 4 times of the diameter.
As a preferred scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the concrete floor is arranged on a T-shaped support of three pipe upper chords of a large-span trapezoidal space steel pipe truss; the supporting length of the prefabricated plates on the T-shaped support is not less than 100mm, the prefabricated plates and the support are connected in a fillet weld girth welding mode, and the width of a joint between the prefabricated plates is not less than 20 mm; the support length of the steel-concrete composite floor slab on the T-shaped support is not less than 100mm, and the floor bearing plate of the steel-concrete composite floor slab is penetratingly welded with the T-shaped support by adopting a stud shear key.
As the preferable scheme of the large-span trapezoidal space steel pipe truss concrete floor structure, the span of the prefabricated slab is S1, S3 or S6; the steel-concrete composite floor has spans S3 and S6.
The span of the large-span trapezoidal space steel pipe truss is L, the column distance is B, the height of the truss is H, the distance between upper chords of three pipes is S1, the distance between lower chords of two pipes is S2, the distance between upper chords is S3, and the distance between lower chords is S4; the pitch of the quadrangular pyramid diagonal web members is S5, and the pitch of the upper chord members on the outer sides of the ith and (i + 1) th adjacent trapezoidal space steel pipe trusses is S6.
As a preferred scheme of the large-span trapezoidal space steel tube truss concrete floor structure, the concrete floor is not provided with secondary beams; and the secondary truss is not arranged outside the plane of the trapezoidal space steel pipe truss adjacent to the ith and the (i + 1) th trusses.
Compared with the prior art, the utility model discloses following beneficial effect has: the concrete floor that will directly bear the floor load lays on the T shape of three pipe upper chords of large-span trapezoidal space steel pipe truss holds the palm, and the basic unit of large-span trapezoidal space steel pipe truss comprises three pipe upper chords, two pipe lower chords, the oblique web member of quadrangular pyramid, last quarter horizontal pole and last quarter horizontal pole, and the cross-sectional form is triangle-shaped's inverted trapezoid, and space truss steel pipe direct weld node passes through mutually to be connected, has realized: 1. the building has rich form, light shape and is convenient for the pipeline to pass through. 2. Reasonable structure, simple structure, definite force transmission and convenient installation. 3. The span of the floor slab is small, and no secondary beam is arranged. 4. The large-span trapezoidal space truss has good out-of-plane overall stability and is not provided with a secondary truss. 5. The steel for the structure has small steel amount, large rigidity, high bearing capacity, strong spanning capability and good comfort. 6. The mechanical property of the whole structure is excellent.
Drawings
FIG. 1 is a schematic view of a large-span trapezoidal space steel pipe truss concrete floor structure of the present invention;
in the drawings: 1-a base unit; 2-three-pipe upper chord; 3-two-pipe lower chord; 4-quadrangular pyramid diagonal web member; 5-upper chord horizontal bar; 6-lower chord horizontal bar; 7-T shaped support; 8-stud shear key; 9-prefabricated plate assembly; 10-steel-concrete composite floor slab.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the utility model comprises a large-span trapezoidal space steel pipe truss and a concrete floor, and the concrete floor directly bearing the floor load is arranged on the T-shaped support of the three-pipe upper chord 2 of the large-span trapezoidal space steel pipe truss; the basic unit 1 of the large-span trapezoidal space steel pipe truss is a internode, and each internode is composed of a three-pipe upper chord member 2, a two-pipe lower chord member 3, a quadrangular pyramid inclined web member 4, an upper chord horizontal member 5 and a lower chord horizontal member 6; the cross section of the basic unit is in a shape of an inverted trapezoid in triangular arrangement; the large span is formed by splicing a plurality of basic units of the trapezoidal space steel pipe truss; the three-pipe upper chord 2 and the two-pipe lower chord 3 of the large-span trapezoidal space steel pipe truss are main pipes; the quadrangular pyramid diagonal web member 4, the upper chord horizontal rod 5 and the lower chord horizontal rod 6 are branch pipes; the large-span trapezoidal space steel pipe truss is connected by adopting the penetration of steel pipe direct welding nodes; the concrete floor slab is an assembled precast slab 9 or a steel-concrete composite floor slab 10; the concrete floor is connected with the large-span trapezoidal space steel pipe truss through a T-shaped support 7 and a shear key 8 of a stud.
In this embodiment, the rods of the basic unit 1 are all round steel tubes, and the steel tubes can be rolled or welded.
In the embodiment, the large-span trapezoidal space steel pipe truss with the directly welded joints has the advantages that the external size of the main pipe is not smaller than that of the branch pipe, the wall thickness of the main pipe is not smaller than that of the branch pipe, and the branch pipe cannot be inserted into the main pipe at the joint of the branch pipe and the main pipe; the included angle between the main pipe and the branch pipe or the axis of the branch pipe is not less than 30 degrees; the end part of the branch pipe of the large-span trapezoidal space steel pipe truss is cut by an automatic pipe cutting machine, and a groove is not cut when the wall thickness of the branch pipe is smaller than 6 mm.
In this embodiment, the trapezoidal space steel pipe truss of large-span of direct welding node, branch pipe adopt gapped K shape node and lapped K shape node, and are not less than 2 times of two branch pipe wall thickness in the clearance of the adjacent branch pipe of the main pipe surface welding, and the peripheral welding seam of overlap joint branch pipe is 2 times branch pipe wall thickness.
In the embodiment, the large-span trapezoidal space steel pipe truss with the directly welded joints is characterized in that the connecting weld of the branch pipe and the main pipe is continuously welded along the whole circumference and is in smooth transition, the weld adopts fillet weld along the whole circumference, or adopts butt weld partially and fillet weld partially, the butt weld or the fillet weld with a groove is adopted for the area where the included angle between the pipe wall of the branch pipe and the pipe wall of the main pipe is greater than or equal to 120 degrees, the size of the leg of the fillet weld is not greater than 2 times of the wall thickness of the branch pipe, and the peripheral weld of the lapped branch pipe is 2 times of the wall thickness of the branch pipe; the large-span trapezoidal space steel pipe truss with the directly welded joints has the advantages that the lap joint rate of the planar K-shaped joints of the branch pipes meets the requirement, and the continuous welding seams between the overlapped branch pipes can reliably transmit internal force.
In this embodiment, the trapezoidal space steel pipe truss of large-span of direct welding node, when the mutual lapped branch pipe external dimension is different, the less overlap joint of external dimension is on the great person of size, and when the branch pipe wall thickness is different, the less wall thickness person overlap joint is on great wall thickness person, and bears the branch pipe of axle center pressure in the below.
In this embodiment, the T-shaped support 7 is welded to the three-pipe upper chord 2 of the large-span trapezoidal space steel pipe truss, and a support surface of the T-shaped support 7 is parallel to the bottom of the concrete slab.
In this embodiment, the shear key 8 is arranged perpendicular to the support surface of the T-shaped bracket 7; the diameter of the stud shear key 8 is not less than 16mm, and the length and the distance are not less than 4 times of the diameter.
In the embodiment, the concrete floor slab 9 or 10 is arranged on the T-shaped support 7 of the three-pipe upper chord 2 of the large-span trapezoidal space steel pipe truss; the supporting length of the prefabricated plates 9 on the T-shaped support 7 is not less than 100mm, the prefabricated plates and the support 7 are connected in a fillet weld girth welding mode, and the width of a joint between the prefabricated plates 9 is not less than 20 mm; the supporting length of the steel-concrete composite floor slab 10 on the T-shaped support 7 is not less than 100mm, and the stud shear keys 8 are adopted to weld the floor bearing plate of the steel-concrete composite floor slab 10 with the T-shaped support 7 in a penetrating manner.
In the actual processing and splicing process, an upper chord plane rod piece, a lower chord plane rod piece and a quadrangular pyramid supporting jig frame are manufactured respectively according to the form of a large-span trapezoidal space steel pipe truss; secondly, distributing three tubes of upper chords 2, upper chord horizontal rods 5 and T-shaped supports 7 on the upper chord plane rod piece supporting jig; two tubes of lower chord rods 3 and lower chord horizontal rods 6 are arranged on the lower chord plane rod piece supporting jig; the upper chord plane rod piece and the lower chord plane rod piece are connected by adopting intersecting welding seams to complete the assembly of the upper chord plane rod piece and the lower chord plane rod piece; moving a quadrangular pyramid supporting jig frame to an installation position by taking the lower chord plane rod piece as a support, and performing intersecting welding on quadrangular pyramid diagonal web members 4 to form a space supporting platform; therefore, upper chord plane rod pieces are further erected and are welded in a penetrating mode, and finally the integral assembly of the trapezoidal space steel pipe truss is completed, so that the steel pipe truss can be stored, transported and installed on site. During actual construction, hoisting equipment is adopted to hoist the large-span trapezoidal space steel pipe truss to the support frame, after the large-span trapezoidal space steel pipe truss is hoisted in place on site and fixed with the support, concrete floor installation is carried out according to design selection, and if an assembled prefabricated plate 9 is selected, the rib bottom of the prefabricated plate is supported on the top surface of the T-shaped support 7 and is connected by fillet welding; if the steel-concrete composite floor slab 10 is selected, firstly, a floor bearing plate is laid, the stud shear keys 8 and the floor bearing plate are penetratingly welded to the T-shaped supports 7 according to the arrangement intervals, distributed reinforcing steel bars are laid, then concrete is poured, and the strength reaches the design index after curing for a certain time, so that the steel-concrete composite floor slab 10 is formed. And finally, manufacturing the whole large-span trapezoidal space steel pipe truss concrete floor structure.
The above-mentioned embodiments are only preferred embodiments of the present invention, and it should be understood by those skilled in the art that the technical solution of the present invention can be modified and replaced easily without departing from the spirit and principle of the present invention, and the modified and replaced embodiments also fall within the protection scope of the appended claims.
Claims (10)
1. The utility model provides a trapezoidal space steel pipe truss concrete floor structure of large-span which characterized in that: the concrete floor is arranged on a T-shaped support (7) of a three-pipe upper chord (2) of the large-span trapezoidal space steel pipe truss, and the concrete floor directly bearing floor load is arranged on the T-shaped support; the basic unit (1) of the large-span trapezoidal space steel pipe truss is a section, each section is composed of three pipe upper chords (2), two pipe lower chords (3), a quadrangular pyramid inclined web member (4), an upper chord horizontal rod (5) and a lower chord horizontal rod (6), the section of the basic unit (1) is in a shape of an inverted trapezoid with triangular arrangement, and the large-span trapezoidal space steel pipe truss is formed by splicing a plurality of basic units; the three-tube upper chord member (2) and the two-tube lower chord member (3) of the large-span trapezoidal space steel tube truss are main tubes, and the quadrangular pyramid diagonal web member (4), the upper chord horizontal rod (5) and the lower chord horizontal rod (6) are branch tubes; the large-span trapezoidal space steel pipe truss is connected by adopting the penetration of steel pipe direct welding nodes; the concrete floor slab adopts an assembled precast slab (9) or a steel-concrete composite floor slab (10); the concrete floor is connected with the large-span trapezoidal space steel pipe truss through a T-shaped support (7) and a shear key (8) of a stud.
2. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the large-span trapezoidal space steel pipe truss is in the form of a parallel chord truss, a trapezoidal truss, a height-variable curved surface truss or an arched truss.
3. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the rod pieces of the basic unit (1) are all round steel tubes, and the types of the steel tubes are rolled or welded; the ratio of the outer diameter to the wall thickness of the pressure-bearing rod piece of the large-span trapezoidal space steel pipe truss is not more than
εkIs a steel grade correction coefficient.
4. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the node center distance S with the length of 0.9 times calculated in and out of the plane of the three-pipe upper chord (2) and the two-pipe lower chord (3)j0J0 is equal to 1, 2, and is equal to 0.9Sj0Checking the stability of the pressure rod according to a lattice type; the node center distance S of which the calculation length is 0.8 times in the plane and out of the plane of the quadrangular pyramid diagonal web member (4), the upper chord horizontal rod (5) and the lower chord horizontal rod (6)j1，j1＝3、4、5。
5. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the external size of the main pipe is not smaller than that of the branch pipe, the wall thickness of the main pipe is not smaller than that of the branch pipe, and the branch pipe is not inserted into the main pipe at the connecting part of the branch pipe and the main pipe; the included angle between the main pipe and the branch pipe or the axis of the branch pipe is not less than 30 degrees; and cutting the end part of the branch pipe of the large-span trapezoidal space steel pipe truss, and cutting a groove when the wall thickness of the branch pipe is less than 6 mm.
6. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the eccentricity at the connecting node of the branch pipe and the main pipe is not more than-0.55 and not more than e/D and not more than 0.25; the influence of eccentric bending moment is considered for the pressure main pipe, the influence is ignored for the tension main pipe and the node, the eccentric bending moment M is delta N.e, in the formula, e is the eccentricity, D is the outer diameter of the main pipe, and delta N is the difference value of the axial force of the main pipes on two sides.
7. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the branch pipes adopt K-shaped nodes with gaps and overlapped K-shaped nodes, the gap between adjacent branch pipes welded on the surface of the main pipe is not less than 2 times of the wall thickness of the two branch pipes, and the circumferential welding seam of the overlapped branch pipe is 2 times of the wall thickness of the branch pipe.
8. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 7, wherein: the connecting welding seam of the branch pipe and the main pipe is continuously welded along the whole circumference and smoothly transited; the welding form adopts fillet welding along the whole circumference, or adopts butt welding partially and fillet welding partially; adopting butt welding seams or angle welding seams with grooves for areas where the included angle between the pipe wall of the branch pipe and the pipe wall of the main pipe is greater than or equal to 120 degrees, wherein the size of a welding leg of each angle welding seam is not greater than 2 times of the wall thickness of the branch pipe, and the peripheral welding seam of the lapped branch pipe is 2 times of the wall thickness of the branch pipe; the plane K-shaped node of the branch pipe lap joint has the lap joint rate of more than or equal to 25%ovLess than or equal to 100 percent, and the continuous welding seam between the lap joint branch pipes can reliably transfer the internal force; when the external dimensions of the mutually lapped branch pipes are different, the branch pipe with smaller external dimension is lapped on the branch pipe with larger dimension, when the wall thicknesses of the branch pipes are different, the branch pipe with smaller wall thickness is lapped on the branch pipe with larger wall thickness, and the branch pipe bearing the axle center pressure is arranged below.
9. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the T-shaped support bracket (7) is welded on the three-pipe upper chord member (2), and the supporting surface of the T-shaped support bracket (7) is parallel to the plate bottom of the concrete floor; the shear key (8) of the stud is vertically arranged with the bearing surface of the T-shaped support (7); the diameter of the stud shear key (8) is not less than 16mm, and the length and the distance are not less than 4 times of the diameter.
10. The large-span trapezoidal space steel pipe truss concrete floor structure of claim 1, wherein: the concrete floor is arranged on a T-shaped support (7) of a three-pipe upper chord member (2) of a large-span trapezoidal space steel pipe truss, when an assembled prefabricated plate (9) is adopted, the supporting length of the assembled prefabricated plate (9) on the T-shaped support (7) is not less than 100mm, the assembled prefabricated plate and the support (7) are connected in a fillet weld enclosure welding mode, and the width of a seam between the assembled prefabricated plates (9) is not less than 20 mm; when the steel-concrete composite floor (10) is adopted, the supporting length of the steel-concrete composite floor (10) on the T-shaped support (7) is not less than 100mm, and the stud shear keys (8) are adopted to weld the floor bearing plate of the steel-concrete composite floor (10) and the T-shaped support (7) in a penetrating manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023224404.9U CN214246315U (en) | 2020-12-28 | 2020-12-28 | Large-span trapezoidal space steel pipe truss concrete floor structure |
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| CN202023224404.9U CN214246315U (en) | 2020-12-28 | 2020-12-28 | Large-span trapezoidal space steel pipe truss concrete floor structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538931A (en) * | 2020-12-28 | 2021-03-23 | 陕西建工钢构集团有限公司 | Large-span trapezoidal space steel pipe truss concrete floor structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538931A (en) * | 2020-12-28 | 2021-03-23 | 陕西建工钢构集团有限公司 | Large-span trapezoidal space steel pipe truss concrete floor structure |
| CN112538931B (en) * | 2020-12-28 | 2025-02-14 | 陕西建工钢构集团有限公司 | A large-span trapezoidal space steel tube truss concrete floor structure |
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