CN101050659A

CN101050659A - Large span combined truss

Info

Publication number: CN101050659A
Application number: CN 200610050163
Authority: CN
Inventors: 杨峰
Original assignee: Individual
Current assignee: HUAHUI ENGINEERING DESIGN GROUP Co Ltd
Priority date: 2006-04-03
Filing date: 2006-04-03
Publication date: 2007-10-10
Anticipated expiration: 2026-04-03
Also published as: CN100547202C

Abstract

The present invention relates to a large-span combined truss. Its structure is simple and reasonable, its bearing force is large, after said truss is erected, the concrete can be directly poured and laid on its surface and can be formed into a laminated flooring layer. It is characterized by that it has two structural members, every structural member is formed from upper chord rod, web rod and lower chord rod, two upper chord rods of two structural members are mutually parallel and spaced for a certain distance, and between two upper chord rods a prefabricated plate is connected.

Description

Large span combined truss

Technical field

The present invention relates to the truss in the building structural member, particularly support the truss of flooring.

Background technology

In multilayer and highrise building, floor system has forms such as cast-in-situ steel reinforced concrete beam and slab type, flat, girder steel profiled sheet concrete slab formula and prefabricated reinforced concrete sheet pack plywood formula; But along with development economic and society, architectural space develops to the high-adaptability direction of large bay large span, mode of construction develops to the industrialization direction, therefore existing floor system more and more can not adapt to above-mentioned requirements, the large span floor system is released in order to address the above problem just, and it can be widely used in the highrise building of buildings such as multi storied factory building, warehouse, supermarket, office and large bay; At present, a kind of simple in structure, bearing capacity is big, be fit to directly to set up water the large span combined truss that forms superimposed flooring of spreading concrete and do not appear in the newspapers.

Summary of the invention

The present invention proposes in order to solve the suitable large span combined truss simple in structure, economical rationality that directly sets up the disturbing concrete flooring of present shortage, the present invention provides a kind of large span combined truss for this reason, this trussed construction is simple relatively, rationally, bearing capacity is big, can directly water thereon after setting up to spread concrete and form superimposed flooring.

For addressing the above problem, its special character of the technical solution used in the present invention is to have the structural member that two Pin are made of upper chord, web member and lower chord combination, the upper chord of described two structural members is parallel to each other and an alternate distance, strides between described two upper chords that are parallel to each other and is associated with precast plate.

Described precast plate is preferably some and arranges one by one by the upper chord length direction and to put, and described web member is a diagonal web member, constitutes the both ends of corresponding described every precast plate one side in adjacent two web members upper end of V-arrangement.

Described precast plate is preferably reinforced concrete prefabricated board, should depression be arranged two-dimensional arrangement above the precast plate, and precast plate four bights have the breach of upper and lower perforation, and the corresponding indentation, there of contiguous prefabricated plate is provided with its lower end of shear key and is coupled to web member.

Described upper chord two ends are associated with fixedly upper chord of end, and end fixedly upper chord outer end is welded with the end hold item.

Described two its lower chords of Pin structural member closing mutually are integral and make the present invention become "  " type structure, also can be parallel to each other and an alternate distance makes the present invention become " ∏ " type structure.

Described two its lower chords of Pin structural member mutual closings is integral and makes the present invention become "  " type structure, can be provided with the two web member lower ends of its lower end of plate centre post between described every precast plate middle part and the lower chord, to reduce the stressed span of plate corresponding to described forming V-shape.

Lower chord of the present invention is generally the angle steel chord member, and prestressed reinforcement is placed to strengthen the tensile strength of lower chord by the place, angle within it, reduces the truss amount of deflection.

Can on described lower chord, be associated with the furred ceiling connector in the compartment of terrain, to be fit to install furred ceiling.

Its side of described every precast plate thin platform shape that should slope inwardly from bottom to top in echelon leaks under the cement paste when v-depression bottom pointing that becomes by spell shape in contiguous prefabricated plate side has V-arrangement lid seam iron plate can prevent the disturbing concrete flooring.Precast plate and upper chord bolted on connection.

Truss of the present invention is a plurality of parallelly one by one to be held on girder steel, concrete beam or load bearing wall by row, and direct concreting forms whole flooring thereon.

Upper chord among the present invention can be light gauge cold-formed steel shape or angle steel, establishes fixedly upper chord of shear key and end, upper chord can with shear key, end fixedly upper chord welding or bolted on connection; The upper chord that then makes of bolted on connection becomes detachable upper chord, can unload upper chord for reusing after cast-in-situ concrete reaches intensity.

Two-dimensional arrangement has depression above the described precast plate, so that the bond between fresh and hardened concretes performance is better.

Be provided with shear key, can resist the shearing of horizontal two-dimension direction and the pulling capacity of vertical direction, simultaneously steel mesh reinforcement horse staking and the concrete floor THICKNESS CONTROL standard point of double as concrete floor.

Described two its lower chords of Pin structural member mutual closings is integral and makes the present invention become "  " type structure, but two lower chord compartment of terrains adopt " ∩ " shape part fastener to fasten

Described two its lower chords of Pin structural member are parallel to each other and an alternate distance makes the present invention become " ∏ " type structure, help setting up of large-scale pipeline under the flooring, need take to make " ∏ " type framework stable interim pole this moment.

Described web member can adopt steel pipe, is welding with it with shearing resistance part, the flattening of lower chord connection place and bending one angle, and shear connector and upper chord can adopt welding or bolted on connection.

The present invention is owing to be provided with upper chord, lower chord, web member, two upper chord spans be associated with precast plate can directly water on it spread concrete form whole, so the present invention is simple in structure, supporting capacity is big, it is compared with existing floor system has significant advantage and be: 1. cost is low, can save pricncipal rafter and template, steel content is economized, and material usage is few; 2. speed of application is fast, and member can be prefabricated in the factory, lifting again behind the on-site consolidation, and operation is simple; 3. pipeline is easy for installation, does not take up space in addition, also can directly lay secondary joist on lower chord and do furred ceiling, easy construction, cost saving; 4. adopt the integral precast mode, structural integrity is good.

Description of drawings

Fig. 1 is a kind of truss side direction structural representation of the present invention;

Fig. 2 is Fig. 1 truss A-A cross-sectional schematic;

Fig. 3 is Fig. 2 partial enlarged drawing;

Fig. 4 is that Fig. 1 truss end is to structural representation;

Fig. 5 is Fig. 4 partial enlarged drawing;

Fig. 6 is Fig. 1 truss vertical view;

Fig. 7 is Fig. 1 truss upward view.

Be labeled as among the figure: 1 upper chord, 2 precast plates, the 2-1 depression, the 2-2 breach, 3 shear keies, 4 web members, 5 lower chords, 6 ends are upper chord fixedly, 7 end hold items, 8 furred ceiling connectors, 9 plate centre posts, 10 prestressed reinforcements, 11V type lid seam iron plate.

The specific embodiment

Embodiment 1

Large span combined truss has the structural member that two Pin are made of upper chord 1, web member 4 and lower chord 5 combinations, the upper chord 1 of this two structural member is parallel to each other and an alternate distance, stride between two upper chords that are parallel to each other and be associated with some precast plates 2 and arrange one by one by upper chord 1 length direction and put, every its side of precast plate slopes inwardly from bottom to top, and the v-depression bottom pointing that contiguous prefabricated plate side becomes by spell shape has V-arrangement lid seam iron plate 11; Web member 4 is a diagonal web member, constitutes the both ends of corresponding described every precast plate one side in adjacent two web members 4 upper ends of V-arrangement; Precast plate 2 is a reinforced concrete prefabricated board, two dimension is laid with depression 2-1 above it, every precast plate four bights have the breach 2-2 of upper and lower perforation, the corresponding breach 2-2 place of contiguous prefabricated plate is provided with shear key 3, shearing resistance part and upper chord can adopt welding or bolted on connection, precast plate and upper chord bolted on connection; The upper chord two ends are associated with fixedly upper chord 6 of end, and end fixedly upper chord outer end is associated with end hold item 7; Its lower chord 5 employing " ∩ " shape parts of described two Pin structural members are laid the closing of button card at interval makes end of the present invention to becoming "  " type configuration; Be associated with the two web member lower ends of plate centre post 9 its lower ends corresponding to described formation V-arrangement in the middle part of the every precast plate and between the lower chord, this corresponding end also is the i.e. four back taper tops, four sides, space that web members constitute of the two web members of a pair of V-arrangement; Lower chord is that its interior angle place of angle steel chord member can establish prestressed reinforcement 10; The compartment of terrain is associated with furred ceiling connector 8 on the lower chord.

Embodiment 2

Large span combined truss has the structural member that two Pin are made of upper chord 1, web member 4 and lower chord 5 combinations, the upper chord 1 of this two structural member is parallel to each other and an alternate distance, stride between these two upper chords that are parallel to each other and be associated with some precast plates 2 and arrange one by one by upper chord 1 length direction and put, web member 4 is a diagonal web member, constitutes the both ends of the corresponding described every precast plate in adjacent two web members 4 upper ends of V-arrangement; Precast plate 2 is a reinforced concrete prefabricated board, and two dimension is laid with depression 2-1 above it, and every precast plate four bights have the breach 2-2 of upper and lower perforation, and the corresponding breach 2-2 place of contiguous prefabricated plate is provided with shear key 3; Every its side of precast plate slopes inwardly from bottom to top, and the v-depression bottom pointing that contiguous prefabricated plate side becomes by spell shape has V-arrangement lid seam iron plate 11; Precast plate and upper chord bolted on connection; The upper chord two ends are associated with fixedly upper chord 6 of end, and end fixedly upper chord outer end is associated with end hold item 7; Described its lower chord 5 of two Pin structural members is parallel to each other and an alternate distance makes end of the present invention to becoming " ∏ " type structure.

Claims

1, large span combined truss, it is characterized in that having two Pin by upper chord (1), web member (4) and lower chord (5) structural member in conjunction with formation, the upper chord of described two structural members (1) is parallel to each other and an alternate distance, strides between described two upper chords that are parallel to each other and is associated with precast plate (2).

2, large span combined truss as claimed in claim 1, it is characterized in that described precast plate (2) arranges one by one by upper chord (1) length direction and to put for some, described web member (4) is a diagonal web member, constitutes the both ends of corresponding described every precast plate one side in adjacent two web members (4) upper end of V-arrangement.

3, large span combined truss as claimed in claim 2, it is characterized in that described precast plate (2) is a reinforced concrete prefabricated board, two-dimensional arrangement has depression (2-1) above the precast plate, precast plate four bights have the breach (2-2) of upper and lower perforation, and the corresponding breach (2-2) of contiguous prefabricated plate is located to be provided with its lower end of shear key (3) and is coupled to web member (4).

4, as claim 1,2 or 3 described large span combined truss, it is characterized in that described upper chord two ends are associated with fixedly upper chord (6) of end, end fixedly upper chord outer end is associated with end hold item (7).

5, large span combined truss as claimed in claim 4, it is characterized in that described two its lower chords of Pin structural member (5) mutually closing be integral and make the present invention become "  " type structure.

6, large span combined truss as claimed in claim 4 is characterized in that described two its lower chords of Pin structural member (5) are parallel to each other and an alternate distance makes the present invention become " ∏ " type structure.

7, large span combined truss as claimed in claim 2, it is characterized in that described two its lower chords of Pin structural member (5) mutually closing be integral and make the present invention become "  " type structure, be associated with the two web member lower ends of its lower end of plate centre post (9) between described precast plate middle part and the lower chord corresponding to described forming V-shape.

8, large span combined truss as claimed in claim 5 is characterized in that described lower chord is that its interior angle place of angle steel chord member is provided with prestressed reinforcement (10).

9, large span combined truss as claimed in claim 5 is characterized in that the compartment of terrain is associated with furred ceiling connector (8) on the described lower chord.

10, large span combined truss as claimed in claim 2 is characterized in that its side of described every precast plate slopes inwardly from bottom to top, and the v-depression bottom pointing that contiguous prefabricated plate side becomes by spell shape has V-arrangement lid seam iron plate (11).