CN201924495U - Giant latticed structure for cylindrical surface of membranous type latticed shell substructure - Google Patents

Abstract

The utility model discloses a giant latticed structure for a cylindrical surface of a membranous type latticed shell substructure, comprising two stages as follows: a main body structure (I) and a substructure (II) arranged within the main body structure, wherein the main body structure (I) is a cylindrical latticed structure which is constructed by intersecting a transverse three-dimensional beam (1) and a vertical three-dimensional beam (2); and the giant latticed structure is characterized in that the substructure is a single-layer membranous type latticed shell; the curved surface of the single-layer membranous type latticed shell substructure (II) is formed according to the points that the shell just comprises two orthogonal principal stresses, the principal stress of all the points are same the curved surface equation solved according to a membrane theory; the substructure is composed of a set of orthogonal rods and diagonal rods arranged among the orthogonal rods; the rods are connected by welding hollow sphere joints; the substructure is embedded within the large lattice (3) of the main body structure by means of surrounding point support, so that a structure form that a small lattice is nested in w large lattice is formed. The giant latticed structure for a cylindrical surface of a membranous type latticed shell substructure provided by the utility model has the advantages that the limitations to the large internal force of rod, the stability of the rod and the stability of the structure can be broken, the construction is simplified, the steel usage is reduced further, and the cost of the project is reduced.

Description

The huge network in a kind of membranous type net shell structure face of cylinder

Technical field

The utility model relates to the huge network in the membranous type net shell structure face of cylinder in builing industry space structures field.

Background technology

Double-deck cylindrical latticed shell structure is to use more a kind of form of structure in the present large-span space structure, but this structure is along with some unavoidable problem can appear in the further increase of span,, rod member less as grid more in short-term, structure can easily cause whole unstability because of thick striding than too little; And grid big, when rod member is long, easily cause strut buckling because of internal force is excessive, and the steel using amount increase that causes therefrom etc.I have broken through the big internal force of rod member and pressure bar stabilization and structural entity stable restriction by the flat plate framed structure minor structure face of cylinder crossed space truss giant grid structure of invention, can realize development effectively to super-span, but this structure adopts double-layer plate rack minor structure, the minor structure size of mesh opening is less, rod member and node are relatively many, the processing and fabricating workload is bigger, and minor structure border size of mesh opening and the agent structure space truss size of mesh opening that winds up is unequal, makes minor structure and agent structure joint construction between the two comparatively complicated.

Summary of the invention

The purpose of this utility model is to overcome deficiency of the prior art, and a kind of individual layer membranous type net shell structure face of cylinder crossed space truss giant grid structure of super-span is provided.To realize effectively breaking through the big internal force of rod member and pressure bar stabilization and structural entity stable restriction, simplified construction further reduces steel using amount, reduces construction costs simultaneously.

The technical solution of the utility model is: comprise agent structure and the minor structure two-stage that is arranged in the agent structure, described agent structure is a kind of by laterally intersecting the face of cylinder type macrolattice structure that constitutes with the longitudinal stereoscopic truss, it is characterized in that, described minor structure is an individual layer membranous type net shell, and the curved surface of described individual layer membranous type net shell structure is according to only having two mutually orthogonal principal compressive stresses in the shell and principal compressive stress everywhere is all identical, try to achieve surface equation and moulding by membrane theory.Described membranous type net shell structure is made of one group of mutually orthogonal rod member and the brace that is arranged between the orthogonal bars, described quadrature rod member bears principal compressive stress in the shell, brace between the quadrature rod member mainly improves the rigidity and stability of quadrature rod member, connects by welded hollow spherical joints between each rod member.Described minor structure end opening border is the quadrangular plan of a closure, and the mode that supports with peripheral point is embedded in the agent structure macrolattice, forms the form of structure that a kind of macrolattice overlaps little grid.

Described individual layer membranous type net shell structure boundary size of mesh opening and the described space truss little size of mesh opening that winds up equates, make minor structure border and the agent structure space truss intersection that winds up not have rod member overlapping, simplified minor structure and agent structure joint construction between the two greatly, minor structure is embedded in the agent structure macrolattice in the mode of peripheral point supporting, has guaranteed the boundary constraint and the bearing capacity thereof of minor structure.

Described space truss by two parallel upper chords, lower chord, go up web member between the lower chord and cross bar and the hound between two upper chords formed, described space truss section is a triangle, wind up and be the little grid of quadrangle, described hound is positioned at the little grid of the quadrangle that winds up, with the stability of the little grid of quadrangle that keeps winding up.Web member, cross bar and hound all adopt tubular joint directly to be welded on the lower chord in the described space truss.

Described longitudinal and transverse two connect by welded hollow spherical joints to space truss, and each zone of intersection comprises four wind up node and lower-chord panel points.

Advantage of the present utility model: individual layer membranous type net shell construction profile of the present utility model is smooth, construct fairly simple, minor structure end opening border is the quadrangular plan of a closure, can seal the quadrangle macrolattice of agent structure well, its minor structure border size of mesh opening and the space truss little size of mesh opening that winds up equates, make minor structure can cooperate well, also simplified joint construction between the two greatly, reduced the processing and fabricating workload with agent structure; The minor structure internal rod is mainly born axial compression, can give full play to the performance of material, and peaceful expanded metals shelf structure is compared, minor structure adopts form of single sheet, make the quantity of rod member and node reduce significantly, further reduced the structure steel using amount, reduced construction costs; The load of total is born by relatively sparse and grand agent structure, and each minor structure is substantially only born the load in the corresponding macrolattice scope, thereby the minor structure internal rod substantially can be by structure requirement configuration.Super-span space net shell roof structure applicable to 150～200m.This macrolattice overlaps the form of structure of little grid, can overcome the problem of strut buckling effectively, the integral rigidity that can increase substantially structure with stability, avoid strut buckling.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is that individual layer membranous type net shell structure constitutes schematic diagram;

Fig. 4 is a triangular-section space truss beam schematic diagram;

Fig. 5 is the A-A sectional view of Fig. 4;

Fig. 6 is embedded in the macrolattice schematic diagram for minor structure with the peripheral point support pattern;

Fig. 7 is the A-A sectional view of Fig. 6;

Fig. 8 is a space truss zone of intersection organigram.

The specific embodiment

In conjunction with the accompanying drawings:

Total is made of with the minor structure II two-stage that is arranged in the agent structure agent structure I, each bar of inside configuration is round steel pipe, described agent structure is a kind ofly to intersect the face of cylinder macrolattice structure that constitutes byhorizontal space truss 1 and longitudinalstereoscopic truss 2, its quadrangle macrolattice 3 is of a size of 10～30m, described minor structure is common individual layer membranous type net shell, be embedded in the quadrangle macrolattice 3, form the form of structure that a kind of macrolattice overlaps little grid, the load of total is born by relatively sparse and grand agent structure, and minor structure is substantially only born the load in the corresponding macrolattice scope.

The curved surface of described individual layer membranous type net shell structure I I is according to only having two mutually orthogonal principal compressive stresses in the shell and principal compressive stress everywhere is all identical, try to achieve surface equation and moulding by membrane theory.The minor structure smooth-shaped, near sphere, andend opening border 4 is the quadrangular plan of a closure, can seal the quadrangle macrolattice 3 of agent structure well; Described minor structure is made of one group of mutuallyorthogonal rod member 5 and thebrace 6 that is arranged between theorthogonal bars 5, describedquadrature rod member 5 bears principal compressive stress in the shell, thebrace 6 main rigidity and stability that improve the quadrature rod member between the quadrature rod member connect by welded hollow spherical joints 7 between each rod member.

Describedspace truss 1 is formed withhound 12 by two parallelupper chords 8,lower chord 9,web member 10 and the cross bar between twoupper chords 11 gone up between the lower chord with 2; Described space truss section is a triangle; The parallelupper chord 8 with two of describedcross bar 11 constitutes the little grid of the quadrangle that winds up of described space truss, and describedhound 12 is positioned at the little grid of the quadrangle that winds up, to keep the stability of the described little grid of quadrangle that winds up.Described lower chord, web member, cross bar and the hound gone up all adopts tubular joint directly to be welded on the lower chord.

Described minor structure border size of mesh opening a and the described space truss little size of mesh opening b that winds up equates, makes minor structure border and the agent structure space truss intersection that winds up not have rod member overlapping, simplified minor structure and agent structure joint construction between the two greatly; Described minor structure is embedded in the agent structure macrolattice 3 in the mode of peripheral point supporting 13, has guaranteed the boundary constraint and the bearing capacity thereof of minor structure.

Described horizontal stroke, vertical two is connected by welded hollow spherical joints with 2 tospace truss 1, and each zone of intersection comprises four wind upnode 14 and lower-chord panel points 15.

Claims (4)

1. huge network in the membranous type net shell structure face of cylinder, comprise agent structure and the minor structure two-stage that is arranged in the agent structure, described agent structure is a kind of by laterally intersecting the face of cylinder type macrolattice structure that constitutes with the longitudinal stereoscopic truss, it is characterized in that, described minor structure is an individual layer membranous type net shell, the curved surface of described individual layer membranous type net shell structure is according to only there being two mutually orthogonal principal compressive stresses in the shell, and principal compressive stress everywhere is all identical, try to achieve surface equation and moulding by membrane theory, described minor structure is made of one group of mutually orthogonal rod member and the brace that is arranged between the quadrature rod member, connect by welded hollow spherical joints between each rod member, described minor structure is embedded in the agent structure macrolattice in the mode of peripheral point supporting, forms the form of structure that a kind of macrolattice overlaps little grid.

2. the huge network in the membranous type net shell according to claim 1 structure face of cylinder, it is characterized in that, described individual layer membranous type net shell structure boundary size of mesh opening and the described space truss little size of mesh opening that winds up equates that minor structure is embedded in the agent structure macrolattice in the mode of peripheral point supporting.

3. the huge network in the membranous type net shell according to claim 1 structure face of cylinder, it is characterized in that, described space truss by two parallel upper chords, lower chord, go up web member between the lower chord and cross bar and the hound between two upper chords formed, described space truss section is a triangle, wind up and be the little grid of quadrangle, described hound is positioned at the little grid of the quadrangle that winds up, with the stability of the little grid of quadrangle that keeps winding up, web member, cross bar and hound all adopt tubular joint directly to be welded on the lower chord in the described space truss.

4. the huge network in the membranous type net shell according to claim 1 structure face of cylinder is characterized in that, described longitudinal and transverse two connect by welded hollow spherical joints to space truss, and each zone of intersection comprises four wind up node and lower-chord panel points.

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