Combined-type cable dome structure for elliptic plane with unequal-height boundary

A composite, cable dome technology, applied in the direction of roof, building components, building structure, etc., can solve the problems of reducing the mid-span deflection of the secondary structure and the small spanning capacity of the rigid roof, so as to reduce the cost and construction difficulty, and balance the cable. The effect of unbalanced force, reducing adverse effects

Active Publication Date: 2015-10-14

TIANJIN UNIV RES INST OF ARCHITECTRUAL DESIGN & URBAN PLANNING +1

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AI-Extracted Technical Summary

Problems solved by technology

However, the spanning capacity of the rigid roof is small, and it is necessary to add a secondary structure to support the roof and transmit the roof load to the main structure of the cable dome. Since the ridge cable has only axial stiffness but no bendi...

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Method used

There are two four-ring slanted cables and two outer ring ring cables at the lower nodes of the above-mentioned composite cable dome structure outer ring brace to be connected by four drag cables, which are super statically indeterminate structures, therefore, can be controlled by each The ratio of the section sizes of the cables (that is, the ratio of the axial tensile stiffness) enable...

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Abstract

The invention discloses a combined-type cable dome structure for an elliptic plane with an unequal-height boundary. The combined-type cable dome structure comprises an outer-ring beam arranged on unequal-height capitals of a lower structure. The outer-ring beam adopts a space-curve form which changes along with the elevation of capitals of the lower structure. The horizontal projection of the outer-ring beam is ellipse. An inner-ring beam is arranged above the middle portion of the outer-ring beam. Inhaul cables and ridge cables are arranged on the outermost ring of the outer-ring beam and the inner-ring beam through a levy-type structure, and inhaul cables and ridge cables are arranged within the outermost ring through a Geiger-type structure. A connecting beam for a balancing cable is arranged on the inner-ring beam additionally, and the balancing cable is arranged between the inner-ring beam and the outer-ring beam additionally. The combined-type cable dome structure can be applied to a structural engineering of which unequal-height horizontal projection of the boundary is an ellipse plane, the structure is forced uniformly, and the stability is strong; node structure is simple, the manufacturing cost is low, and construction is convenient; laying requirements of rigid roofing material can be met.

Application Domain

Building roofs

Technology Topic

Horizontal projectionEllipse +3

Image

Examples

Experimental program(1)

Example Embodiment

[0025] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples, and detailed descriptions are as follows with accompanying drawings:

[0026] See Figure 1 ~ Figure 7 , An elliptical plane composite cable dome structure with unequal-height boundaries, including an outer ring beam 1 applied to the top of a unequal-height column of a substructure. The outer ring beam 1 adopts a spatial curve that changes with the elevation of the column top of the substructure Form, the horizontal projection of the outer ring beam 1 is an ellipse. The outer ring beam 1 may adopt a concrete or steel structure. In this embodiment, the long axis of the ellipse is 102m, the short axis is 81m, the top of the substructure column is not equal in height, and the difference between the lowest point of the long axis and the highest point of the short axis is 5.7m.

[0027] An inner ring beam 2 is provided above the middle of the outer ring beam 1, and the inner ring beam 2 is provided with a spine cable connecting ring beam 2-1, a diagonal cable connecting ring beam 2-2, and a balance ring beam that are sequentially arranged from top to bottom. The cable connection ring beam 2-3, the spine cable connection ring beam 2-1, the diagonal cable connection ring beam 2-2 and the balance cable connection ring beam 2-3 are supported by a plurality of vertically arranged inner ring beams The rods 2-4 are connected together.

[0028] Between the outer ring beam 2 and the inner ring beam 1 are provided a plurality of inner ring struts 3-1, a plurality of middle ring struts 3-2 and a plurality of outer ring struts arranged in sequence from the inside to the outside. Rod 3-3, the elevation of the lower node of all the inner ring struts 3-1 is the same, and the elevation of the lower node of all the middle ring struts 3-2 is the same; the lower node of all the outer ring struts 3-3 The elevation is different and varies with the elevation of the corresponding position on the roof.

[0029] The spine cord connecting ring beam 2-1 and the upper node of each inner ring strut 3-1 are connected by a one-ring spine 4-1, and the upper node of the inner ring strut 3-1 is connected to the The upper node of the middle ring strut 3-2 is connected by a two-ring backbone 4-2, and the upper node of the middle ring strut 3-2 and the upper node of the outer ring strut 3-3 pass through a three The ring spine cord 4-3 is connected, and the upper node of the outer ring strut 3-3 is connected to the outer ring beam 1 through two four-ring spine cables 4-4.

[0030] The diagonal cable connecting ring beam 2-2 is connected to the upper node of each inner ring brace 3-1 by a one-ring diagonal cable 6-1, and the lower node of the inner ring brace 3-1 is connected to The upper node of the middle ring strut 3-2 is connected by a two-ring diagonal cable 6-2, and the lower node of the middle ring strut 3-2 passes through the upper node of the outer ring strut 3-3 A three-ring oblique cable 6-3 is connected, and the lower node of the outer ring brace 3-3 is connected to the outer ring beam 1 through two four-ring oblique cables 6-4.

[0031] The balance cable connecting ring beam 2-3 is connected to the lower node of the inner ring strut 3-1 through two sets of balance cables 7 symmetrically arranged on both sides of the balance cable. The minor axis of the elliptical horizontal projection of the outer ring beam 1 is parallel.

[0032] Between the outer ring beam 2 and the inner ring beam 1, an inner ring ring cable 5-1, a middle ring ring cable 5-2, and an outer ring ring cable 5-3 that increase from the inside to the outside are arranged, The inner ring grommet 5-1, the middle ring grommet 5-2, and the outer ring grommet 5-3 are sequentially arranged from top to bottom, and the inner ring grommet 5-1 and the balance The cable connecting ring beams 2-3 are in the same plane, the inner ring ring cable 5-1 is connected by all the lower nodes of the inner ring brace 3-1, the middle ring ring cable 5-2 It is connected by the lower nodes of all the middle ring struts 3-2, and the outer ring loop 5-3 is connected by the lower nodes of all the outer ring struts 3-3, so The shape of the outer ring 5-3 is consistent with the outer contour shape of the roof.

[0033] At the lower node of the outer ring brace of the above-mentioned composite cable dome structure, there are two four-ring oblique cables and two outer ring loop cables, a total of four stay cables are connected, which is a statically indeterminate structure. Therefore, it is possible to control the The ratio of the cross-section size (that is, the ratio of the axial tensile stiffness) enables the prestress of the outer ring cable to be continuous and uniform even under the condition of irregular boundaries. The balance cable is used to connect the lower node of the ring beam and the inner ring brace, and the uneven internal force of the ring cable caused by the asymmetry of the boundary can be eliminated by adjusting the axial stiffness ratio of the balance cable and the inner ring cable.

[0034] In this embodiment, a set of centrally symmetrically arranged beams 8 are provided in the spine cable connecting ring beam 2-1, the diagonal cable connecting ring beam 2-2, and the balance cable connecting ring beam 2-3. The length direction of all the cross beams 8 is parallel to the minor axis of the elliptical horizontal projection of the outer ring beam 1. A cross beam 8 is added in the short axis direction of the inner ring beam where the force is greater to balance the uneven forces in the inner ring beam in two directions.

[0035] Although the preferred embodiments of the present invention are described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Under the enlightenment of the present invention, persons can make many forms without departing from the purpose of the present invention and the protection scope of the claims, and these all fall within the protection scope of the present invention.

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Easy to lay
Even by force

Combined-type cable dome structure for elliptic plane with unequal-height boundary

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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