CN102733546A

CN102733546A - Large-span arch truss structure

Info

Publication number: CN102733546A
Application number: CN201210233848XA
Authority: CN
Inventors: 谈丽华; 向红; 常瀚; 路江龙
Original assignee: Suzhou Industrial Park Design and Research Institute Co Ltd
Current assignee: Suzhou Industrial Park Design and Research Institute Co Ltd
Priority date: 2012-07-06
Filing date: 2012-07-06
Publication date: 2012-10-17

Abstract

The invention discloses a large-span arch truss structure. The large-span arch truss structure comprises a truss upper-chord pipe, a truss lower-chord pipe and a truss web member, wherein the truss upper-chord pipe is connected with the upper end of the truss web member; the lower end of the truss web member is connected with the truss lower-chord pipe; the lower end of the truss lower-chord pipe is provided with a slidable support; and prestressed steel-stranded wires are distributed in the truss lower-chord pipe. The large-span arch truss structure provided by the invention has the advantages that the rigidity and the bearing capacity are improved, the stressed state of the structure is optimized and the cost is reduced.

Description

Large span arch trussed construction

Technical field

The present invention relates to large span arch truss field, especially a kind of large span arch trussed construction.

Background technology

Large span arch structure ratio of rise to span hour produces very big horizontal thrust to bearing, and is unfavorable to substructure; If discharging, support displacement then produces bigger bearing horizontal movement, the susceptor design difficulty.

Summary of the invention

For rigidity that overcomes existing large span arch structure and the deficiency that bearing capacity is less, cost is higher, the present invention provides a kind of large span arch trussed construction that improves rigidity and bearing capacity, the stress of optimizing structure, reduces cost.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of large span arch trussed construction; Comprise truss wind up pipe, truss lower chord tube and truss web; Said truss winds up to manage and is connected with the upper end of said truss web; The lower end of said truss web is connected with said truss lower chord tube, and slidably bearing is installed in the lower end of said truss lower chord tube, arrangement prestress steel strand in the said truss lower chord tube.

Technical conceive of the present invention is: the arch tube truss member adopts round steel pipe or square steel pipe, and prestressing force is realized through in lower chord tube, arranging the high-strength prestress steel strand; Bearing adopts slidably bearing, regulates the prestressing force size and controls the bearing horizontal movement to discharge the bearing horizontal thrust, to rely on, and when making roof system satisfy self intensity, rigidity substructure is produced minimum adverse effect.

Beneficial effect of the present invention mainly shows:

(1) reduces the bearing horizontal thrust significantly, can under little ratio of rise to span situation, realize large span;

(2) realize antiarch by prestressing force, reduce the roof system vertical deflection;

(3) improve the rigidity of structure and bearing capacity;

(4) stress of optimizing structure effectively reduces steel using amount, and economic effect is obvious;

(5) prestressed cable does not expose, and structure is neat and artistic.

(6) prestressed cable need not preservative treatment.

Description of drawings

Fig. 1 is the horizontal elevation of arch truss of the present invention;

Fig. 2 is a space view of the present invention;

Fig. 3 is a truss cross section view of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is further described.

With reference to Fig. 1～Fig. 3; A kind of large span arch trussed construction; Comprise truss wind up pipe 2, truss lower chord tube 1 and truss web 3, the said truss pipe that winds up is connected with the upper end of said truss web, and the lower end of said truss web is connected with said truss lower chord tube; It is characterized in that: slidably bearing 5 is installed in the lower end of said truss lower chord tube, arrangement prestress steel strand 4 in the said truss lower chord tube.

In the present embodiment, relate to the type selecting of specific product, like sliding support, prestress wire, tension ground tackle, pipe truss form, and reeve technology and stretching plan etc. should be not limited to limit scope of the present invention.

(1) is mounted on the slidably bearing of substructure;

(2) the arch tube truss lifting that completes is put in place, and prestress wire is penetrated in the lower chord tube;

(3) steel strand penetrate the truss end anchorage, pretension, and then formal stretch-draw up to the prestress value that reaches designing requirement, is monitored truss support displacement and span centre vertical deflection simultaneously;

(4) carry out roofing and mat formation, after roofing construction finishes the truss bearing is connected with the slidably bearing of substructure.

Claims

1. large span arch trussed construction; Comprise truss wind up pipe, truss lower chord tube and truss web; Said truss winds up to manage and is connected with the upper end of said truss web; The lower end of said truss web is connected with said truss lower chord tube, and it is characterized in that: slidably bearing is installed in the lower end of said truss lower chord tube, arrangement prestress steel strand in the said truss lower chord tube.