CN104481028B - A kind of Prestressed Space network - Google Patents

Abstract

The invention discloses a kind of Prestressed Space network, including square connecting elements, compression rod and prestressing force rope.Above-mentioned square shaped element takes the form of square rigid frame, eight apex to be provided with hole, location and be connected with prestressed cable.When adjacent two components connect, determined the centre of form of joint face by prestressed cable in component, use compression rod to connect the centre of form of two joint faces.Finally by prestressing force rope Shi Hanzhang between four components parallel with depression bar.Repeat to extend by said process, plane or network spatially can be formed.The present invention broadly falls into pin-jointed system except square junction parts, compression rod, prestressing force rope, and depression bar direct compression is easy to calculate, and prestress application is convenient, easily forms large span, and stability is stronger.Structure uses node and compression rod, the form of prestressing force rope assembly, it is simple to control size.

Description

A kind of Prestressed Space network

Technical field

The present invention relates to a kind of tension structure, particularly a kind of Prestressed Space network.

Background technology

Tension structure is one group of discontinuous compression member and the self-supporting of a set of continuous print tension unit composition, the space of seif-citing rate Grid system, is proposed in the sixties in last century by Snelson and Fullar.What tension integral structure was intrinsic meets the natural law Feature, has maximally utilised the characteristic in material and cross section, has good looking appearance and discontinuous, and quality is slim and graceful and material efficiency High advantage.Structurally, it is a dynamic equilibrium system that stretch-draw uncertainty kinematically result in it, has entirety Structure self internal force balance, rigidity with prestress change, the features such as the free degree is bigger.

Existing tension structure is mainly strut-cable structure.Research to tradition tension structure is primarily upon the cell layout of structure, power Learn characteristic and prestressed analysis, including geometry, topological sum pattern analysis, mechanical analysis and experimental study, representational example Attached bag includes T prism model, tetrahedral model and the gemstone model of Snelson.

Owing to tension structure belongs to dynamic indeterminate structure, mechanics analysis and computing method is more complicated, and tension structure engineering application in early days is the most less. The eighties in last century, scientist starts to explore the large-span space structure comprising stretch-draw principle, more successfully utilizes stretch-draw The longspan structure that principle is formed has Cable dome and beam string.American engineer Geiger proposes and is supported on inplane pressure ring beam A kind of rope bar prestressed stretch-draw entirety dome system, i.e. Cable dome, become and comprise merely the tension structure of bar rope at large-span structure In most successful utilization.But it relies on external prestress, it is impossible to realize self-balancing, and structure is complicated.Nihon University neat Rattan (Saitoh) professor proposes the self equilibrium systems connecting bending resistance component with strut and formed, i.e. beam-string system.This system Make use of the anti-bending strength Shi Hanzhang of beam, be not the most a kind of traditional tension structure, but as the component of similar beam Use, be therefore also required at two ends support.

Summary of the invention

For problems of the prior art, it is an object of the invention to provide a kind of component simple, easy to control, structure is steady Fixed and can be with Equilibrium, prestress control simple Prestressed Space network.

In order to achieve the above object, the present invention by the following technical solutions: a kind of Prestressed Space network, including at least two Individual square connecting elements, compression rod and prestressing force rope, it is characterised in that the apex of described square connecting elements is provided with Hole, location, the arbitrarily one side of described square connecting elements is joint face, and two diagonal of described joint face are provided with component Interior prestressing force rope, two described diagonal are compared to O point, two diagonal of another square connecting elements joint face Intersect at O ' point, be provided with and two orthogonal compression rods of joint face between described O point and O ' point, described compression rod Two ends are hinged with prestressing force rope in component, and four summits of described square connecting elements joint face are with another square even Being provided with prestressing force rope between component between corresponding four summits of connection member joint face, between described component, prestressing force rope is used for Shi Hanzhang, between described component, prestressing force rope and two joint faces are mutually perpendicular to, in described component prestressing force rope with Between component, prestressing force rope is fixed by hole, location.

The length of side of described square connecting elements is 2a, between a length of 10a-16a of described compression rod, and described pressurized The length of bar and the ratio of diameter are less than 1/15.

In described component, prestressing force rope is a length ofThe length of prestressing force rope and compression rod phase between described component Deng.

Between described component, prestressing force rope area of section is A₁, then between component, prestressing force rope rigidity is EA₁, compression rod cross section Area is A, then compression rod rigidity is EA, and between described component, prestressing force rope total length is 10a, and the distance tightened up is b, Then between component, prestressing force rope prestressing force is:Compression rod axle power is that between component four times of prestressing force rope axle power i.e.Compression rod is deformed intoThe axial displacement that O point and O ' put isPrestressing force rope deformation in component ForNow in component, prestressing force rope internal force is

Use after technique scheme, the method have the advantages that present configuration is succinct, reasonable stress and quality relatively Gently, meet the requirement of long span building, expand the tension structure utilization in large-span space structure field；Prestress control side Just, can be completed by four prestressing force ropes between two components of regulation completely, Stability Analysis of Structures and be difficult to unstability.Structure Span extends can be by increasing component and depression bar, and the number of rope completes.Structure manufacture is convenient, and depression bar stress is simple, in advance Stress rope technique is ripe.Can use as large-span space structure.

Accompanying drawing explanation

Fig. 1 is the structural representation of the square connecting elements of the present invention.

Fig. 2 is the connection diagram of adjacent two square connecting elements of the present invention.

Fig. 3 is the schematic diagram of the present invention a kind of Prestressed Space network.

Fig. 4 is the structural representation of prestressing force rope of the present invention.

Fig. 5 is the structural representation of jointing of the present invention.

Detailed description of the invention

Below according to specific embodiment and Figure of description, the present invention is further explained.

As it is shown in figure 1, a kind of Prestressed Space network, including at least two square connecting elements, compression rod and in advance should Power rope, it is characterised in that the apex of described square connecting elements is provided with hole, location, described square connecting elements Arbitrarily one side is joint face, and two diagonal of described joint face are provided with prestressing force rope in component, and described square connects The length of side of component is 2a, the coordinate on eight summits of square be A (a ,-a, a), B (a, a, a), C (-a, a, a), D (-a ,-a, a), E (a ,-a ,-a), F (a, a ,-a), G (-a, a ,-a) and H (-a ,-a ,-a), two described diagonal, compared to O point, when ABFE is connected with bar face to face, are first used Prestressing force rope connects AF, BE, AF and BE phase and gives O point and form an individual system.O point is for being connected with compression rod.Separately Two diagonal of one square connecting elements joint face intersect at O ' point, are provided with and two companies between described O point and O ' point The orthogonal compression rod of junction, described compression rod two ends are hinged with prestressing force rope in component, and described square connects structure In advance should be provided with between component between four summits corresponding with another square connecting elements joint face, four summits of part joint face Power rope, between described component, prestressing force rope is used for Shi Hanzhang, prestressing force rope and two joint faces between described component Being mutually perpendicular to, in described component, between prestressing force rope and component, prestressing force rope is fixed by hole, location.

During as in figure 2 it is shown, described connected two square shaped element ABCDEFGH and A ' B ' C ' D ' E ' F ' G ' H ' connect, first Step chooses relative two face ABEF and C ' D ' H ' G ' as joint face.Prestressing force rope AF, B ' E ' and DG in second step adapter sleeve, C ' H ', determines the O point and O ' point being connected with depression bar.3rd step installs compression rod between OO ', and two ends are hinged, it is allowed to pressurized Bar is put around O point and O ' and is rotated.4th step connects AD ', BC ', EF with prestressing force rope simultaneously ', HG '.Finally pre-when tightening up these four During stress rope, the rigidity of structure is formed, and the connection between two components completes.Now then omit with O ' some position due to tension force O point Move to square component inside.Between four components, prestressing force rope lengths is less than compression rod length.The length of described compression rod Between 10a-16a, the length of described compression rod and the ratio of diameter are less than 1/15.

In described component, prestressing force rope is a length ofThe length of prestressing force rope and compression rod phase between described component Deng.

Between described component, prestressing force rope area of section is A₁, then between component, prestressing force rope rigidity is EA₁, compression rod cross section Area is A, then compression rod rigidity is EA, and between described component, prestressing force rope total length is 10a, and the distance tightened up is b, Then between component, prestressing force rope prestressing force is:Compression rod axle power is that between component four times of prestressing force rope axle power i.e.Compression rod is deformed intoThe axial displacement that O point and O ' put isPrestressing force rope deformation in component ForNow in component, prestressing force rope internal force is

As it is shown on figure 3, constantly extend in the way of component and compression rod (prestressing force rope) in orthogonal both direction, Formed plane greatly across space structure.

In Prestressed Space network, any two component connects the most in the above described manner, eventually forms overall structure, in planar junction In structure, between all components, the prestressing force on prestressing force rope is equal, i.e. equal proportion applies.

As shown in Figure 4, prestressing force rope ends connects crotch, is used for connecting hole, location.

As it is shown in figure 5, jointing includes tip member 1, clamping components 2, in clamping components 2, it is clamped with cable wire 3.

Claims (4)

1. a Prestressed Space network, including at least two square connecting elements, compression rod and prestressing force rope, it is special Levying and be that the apex of described square connecting elements is provided with hole, location, the arbitrarily one side of described square connecting elements is Joint face, two diagonal of described joint face are provided with prestressing force rope in component, and two described diagonal are compared to O Point, two diagonal of another square connecting elements joint face intersect at O ' point, set between described O point and O ' point Having and two orthogonal compression rods of joint face, described compression rod two ends are hinged with prestressing force rope in component, described Four summits corresponding with another square connecting elements joint face, four summits of square connecting elements joint face it Between be provided with prestressing force rope between component, between described component prestressing force rope be used for Shi Hanzhang, between described component in advance should Power rope and two joint faces are mutually perpendicular to, in described component between prestressing force rope and component prestressing force rope by location hole Fixing.

A kind of Prestressed Space network the most according to claim 1, it is characterised in that described square connecting elements The length of side is 2a, and between a length of 10a-16a of described compression rod, the length of described compression rod and the ratio of diameter are less than 1/15。

A kind of Prestressed Space network the most according to claim 1, it is characterised in that prestressing force rope in described component A length ofBetween described component, the length of prestressing force rope is equal with compression rod.

4. according to a kind of Prestressed Space network described in claim 1 or 2 or 3, it is characterised in that pre-between described component Stress rope area of section is A₁, then between component, prestressing force rope rigidity is EA₁, compression rod area of section is A, then pressurized Bar rigidity is EA, and between described component, prestressing force rope total length is 10a, and the distance tightened up is b, then prestressing force between component Rope prestressing force is:Compression rod axle power is that between component four times of prestressing force rope axle power i.e.Compression rod It is deformed intoThe axial displacement that O point and O ' put isIn component, prestressing force rope is deformed into $\sqrt{2a^2+\frac{1}{4}{(b-\frac{2b{A}_1}{5\mathrm{aA}})}^2}-\sqrt{2a},$ Now in component, prestressing force rope internal force is $(\sqrt{\frac{2a^2+\frac{1}{4}{(b-\frac{2b{A}_1}{5\mathrm{aA}})}^2}{2a^2}}-1){\mathrm{EA}}_1.$