A cable net structure and layout method for ultra-large span inflatable membrane structure

Abstract

The present invention discloses a cable net structure and a laying method for an ultra-large span inflatable membrane structure. The cable net system of the ultra-large span inflatable membrane structure is used for the present invention. Through the reasonable arrangement and joint action of a single inclined cable, a double inclined cable and a longitudinal reinforcing cable, the cable membrane of the ultra-large span inflatable membrane structure is evenly stressed, and the deformation of the cable membrane is further reduced, so that the safety and stability of the inflatable membrane structure with a span of more than 150m can be ensured under extreme climatic conditions.

Description

Technical Field

[0001] The invention belongs to the field of membrane structures, and in particular relates to a cable net structure and a laying method for an ultra-large span inflatable membrane structure. Background Art

[0002] Inflatable membrane structures have been widely used in the construction of closed storage yards for power, coal, steel, cement, ports, etc. in recent years due to their good air tightness, low cost, energy saving and environmental protection. Due to the limitations of equipment layout and operating conditions, the span of such closed storage yards can reach 150m to 200m or more.

[0003] In actual projects, large-span inflatable membrane structures mostly adopt a single cable-stayed net system. Under the action of wind, snow and other loads, as the span of the inflatable membrane structure continues to increase, the stress and deformation of the cable membrane continue to increase, resulting in the inability to meet the equipment operation and structural safety requirements. At present, the span of the inflatable membrane structure with a single cable-stayed net system is controlled below 150m. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a cable net structure and a layout method for a super-large span inflatable membrane structure to meet the bearing capacity and deformation requirements of the super-large span inflatable membrane structure of more than 150m.

[0005] In order to achieve the above-mentioned object, a cable net structure for an ultra-large span inflatable membrane structure comprises a plurality of inclined single cables, a plurality of inclined double cables and at least one longitudinal reinforcing cable;

[0006] The inclined single cable, inclined double cables and longitudinal reinforcing cables are attached to the outer surface of the inflatable membrane, and the ends of the inclined single cable, inclined double cables and longitudinal reinforcing cables are fixed together by a cable net anchoring device. The inclined single cable and inclined double cables are cross-laid along the inclined surface of the inflatable membrane, and the longitudinal reinforcing cables are arranged along the short span direction of the inflatable membrane.

[0007] The shape of the inflatable membrane is a positive Gaussian curvature surface including a cylindrical surface, a spherical surface and an ellipsoidal surface.

[0008] The double-stayed cables are arranged at the stress concentration point of the inflatable membrane.

[0009] The longitudinal reinforcing cables are arranged at the position where the deformation of the inflatable membrane is greater than a threshold value.

[0010] The arrangement of the single-stayed cable, double-stayed cables and longitudinal reinforcing cables complies with the principle of the shortest distance on the spatial curved surface.

[0011] The intersections of the single-stayed cable, double-stayed cables and longitudinal reinforcing cables are fixed by cable net connectors.

[0012] The longitudinal reinforcing cables include a first longitudinal reinforcing cable and a second longitudinal reinforcing cable, and the first longitudinal reinforcing cable and the second longitudinal reinforcing cable are arranged in parallel.

[0013] A method for laying out a cable net structure for an ultra-large span inflatable membrane structure comprises the following steps:

[0014] S1, laying a number of inclined single cables on the outer surface of the inflatable membrane;

[0015] S2, after calculation, a number of inclined double cables are arranged at the stress concentration position on the surface of the inflatable membrane, so that the inclined single cable and the inclined double cables are arranged crosswise along the inclined surface of the inflatable membrane;

[0016] S3, laying longitudinal reinforcing cables at the position where the surface deformation of the inflatable membrane is greater than a threshold value;

[0017] S4, the ends of the inclined single cable, the inclined double cables and the longitudinal reinforcing cables are fixed together through the cable net anchoring device.

[0018] Compared with the prior art, the cable net system of the present invention is used for the super-large span inflatable membrane structure. Through the reasonable arrangement and joint action of the inclined single cable, the inclined double cables and the longitudinal reinforcing cables, the cable membrane of the super-large span inflatable membrane structure is evenly stressed, and the deformation of the cable membrane is further reduced, which can ensure the safety and stability of the inflatable membrane structure with a span of more than 150m under extreme climatic conditions.

[0019] The method of the present invention arranges a plurality of inclined single cables on the outer surface of the inflatable membrane, arranges a plurality of inclined double cables at the stress concentration position on the surface of the inflatable membrane, so that the inclined single cables and the inclined double cables are cross-arranged along the inclined surface of the inflatable membrane, and arranges longitudinal reinforcing cables at the position where the surface deformation of the inflatable membrane is greater than a threshold value; the present invention can reduce cable membrane deformation, eliminate structural stress concentration, and effectively resist wind and snow loads in extreme climates, thereby ensuring the safety and stability of the ultra-large span inflatable membrane structure and saving investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the present invention;

[0021] Figure 2 It is the overall plan layout diagram of the present invention;

[0022] Figure 3 It is the overall three-dimensional axonometric layout diagram of the present invention;

[0023] Among them, 1 is an inflatable membrane, 21 is a single inclined cable, 22 is a double inclined cable, 31 is a first longitudinal reinforcing cable, 32 is a second longitudinal reinforcing cable, 4 is a cable net connector, and 5 is a cable net anchoring device. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention are further described below to facilitate the understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0025] See also Figures 1 to 3 A cable net structure for an ultra-large span inflatable membrane structure, comprising a plurality of inclined single cables 21, a plurality of inclined double cables 22 and at least one longitudinal reinforcing cable; the inclined single cables 21, the inclined double cables 22 and the longitudinal reinforcing cables are attached to the outer surface of the inflatable membrane 1, the ends of the inclined single cables 21, the inclined double cables 22 and the longitudinal reinforcing cables are fixed together by a cable net anchoring device 5, the intersection of the inclined single cables 21, the inclined double cables 22 and the longitudinal reinforcing cables is fixed by a cable net connector 4, the inclined single cables 21 and the inclined double cables 22 are arranged crosswise along the inclined surface of the inflatable membrane 1, and the longitudinal reinforcing cables are arranged along the short span direction of the inflatable membrane 1. The shape of the inflatable membrane 1 is a positive Gaussian curvature surface including a cylindrical surface, a spherical surface and an ellipsoidal surface. The inclined double cables 22 are arranged at the stress concentration point of the inflatable membrane 1. The longitudinal reinforcing cables are arranged at the point where the deformation of the inflatable membrane 1 is greater than a threshold value. The arrangement of the inclined single cable 21, the inclined double cable 22 and the longitudinal reinforcing cable complies with the principle of the shortest distance on the space curved surface. The longitudinal reinforcing cable includes a first longitudinal reinforcing cable 31 and a second longitudinal reinforcing cable 32, and the first longitudinal reinforcing cable 31 and the second longitudinal reinforcing cable 32 are arranged in parallel.

[0026] A method for laying out a cable net structure for an ultra-large span inflatable membrane structure comprises the following steps:

[0027] S1, laying a plurality of inclined single cables 21 on the outer surface of the inflatable membrane 1;

[0028] S2, after calculation, a plurality of inclined double cables 22 are arranged at the stress concentration position on the surface of the inflatable membrane 1, so that the inclined single cable 21 and the inclined double cables 22 are arranged crosswise along the inclined surface of the inflatable membrane 1;

[0029] S3, laying longitudinal reinforcing cables at the position where the surface deformation of the inflatable membrane 1 is greater than a threshold value;

[0030] S4, the ends of the inclined single cable 21, the inclined double cables 22 and the longitudinal reinforcing cables are fixed together through the cable net anchoring device 5, and after several trial calculations, the optimal cable net system that ensures structural safety and economy is obtained.

[0031] According to calculations, taking a 180×300m closed coal yard as an example, the use of the ultra-large span inflatable membrane structure of the present invention can shorten the construction period by about 80 days and save 16.2 million yuan in engineering investment compared with the conventional steel grid structure. The system can be applied to the engineering design of ultra-large span inflatable membrane structures.

Claims

1. A cable net structure for an ultra-large span inflatable membrane structure, characterized in that: It comprises a plurality of inclined single cables (21), a plurality of inclined double cables (22) and at least one longitudinal reinforcing cable; The inclined single cable (21), the inclined double cable (22) and the longitudinal reinforcing cable are attached to the outer surface of the inflatable membrane (1); the ends of the inclined single cable (21), the inclined double cable (22) and the longitudinal reinforcing cable are fixed together through a cable net anchoring device (5); the inclined single cable (21) and the inclined double cable (22) are arranged crosswise along the inclined surface of the inflatable membrane (1); and the longitudinal reinforcing cable is arranged along the short span direction of the inflatable membrane (1); The double-stayed cables (22) are arranged at the stress concentration point of the inflatable membrane (1); The longitudinal reinforcing cables are arranged at the position where the deformation of the inflatable membrane (1) is greater than a threshold value.

2. The cable net structure for a super-large span inflatable membrane structure according to claim 1, characterized in that: The shape of the inflatable membrane (1) is a positive Gaussian curvature surface including a cylindrical surface, a spherical surface and an ellipsoidal surface.

3. The cable net structure for a super-large span inflatable membrane structure according to claim 1, characterized in that: The arrangement of the inclined single cable (21), the inclined double cables (22) and the longitudinal reinforcing cables complies with the principle of the shortest distance on a spatial curved surface.

4. The cable net structure for a super-large span inflatable membrane structure according to claim 1, characterized in that: The intersections of the inclined single cable (21), the inclined double cables (22) and the longitudinal reinforcing cables are fixed via a cable net connector (4).

5. The cable net structure for a super-large span inflatable membrane structure according to claim 1, characterized in that: The longitudinal reinforcing cables comprise a first longitudinal reinforcing cable (31) and a second longitudinal reinforcing cable (32), and the first longitudinal reinforcing cable (31) and the second longitudinal reinforcing cable (32) are arranged in parallel.

6. A method for laying out a cable net structure for an ultra-large span inflatable membrane structure according to claim 1, characterized in that: The following steps are involved: S1, laying a plurality of inclined single cables (21) on the outer surface of the inflatable membrane (1); S2, after calculation, a plurality of inclined double cables (22) are arranged at the stress concentration position on the surface of the inflatable membrane (1), so that the inclined single cable (21) and the inclined double cables (22) are arranged crosswise along the inclined surface of the inflatable membrane (1); S3, laying longitudinal reinforcing cables at a position where the surface deformation of the inflatable membrane (1) is greater than a threshold value; S4, the ends of the inclined single cable (21), the inclined double cables (22) and the longitudinal reinforcing cables are fixed together through the cable net anchoring device (5).

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