String truss with built-in inclined cables

Abstract

The invention discloses a truss string structure internally provided with inclined guy ropes. The truss string structure comprises a top chord, a web member, knot sleeves, a lower cable and the inclined guy ropes, wherein the top chord is connected with the web member in a penetrating manner by way of welding, the lower end of the web member is connected with the knob sleeves, the lower cable penetrates through both rear ends of each knob sleeve and is fixed on support knobs at both ends respectively, the inclined guy ropes are symmetrically arranged, the lower ends of the inclined guy ropes are fixed on the support knobs and the upper ends of the inclined guy ropes are connected with the fixed knot of an upper cable; the fixed knot of the upper cable can be any intersection point between the top chord and the web member in a span scope of the truss string structure which is 1 / 5 to 1 / 3 far from adjacent support knobs. A pre-tress system which can provide bidirectional resistance is formed by the lower cable and the inclined guy ropes and the system can be suitable for wind suction loads. The truss string structure disclosed by the invention further has the advantages of small use level of steel products, simple structure, low preparation cost, good performance, easy construction and the like.

Description

technical field [0001] The invention belongs to the string-tension truss in the technical field of large-span string-tension roof structures, and in particular relates to a string-tension truss in which oblique cables are arranged inside the body. Background technique [0002] The tension truss structure was first proposed by Professor M. Saitoh of Nihon University in 1986. This structure is a new type of hybrid roof system different from the traditional structure. The self-balancing hybrid structure composed of cables and intermediate compression struts is also a relatively successful long-span prestressed spatial structure in the development of hybrid structural systems. [0003] The string truss structure is characterized by a simple system, clear force, and various structural forms, giving full play to the advantages of rigid and flexible materials, and it is simple and convenient to manufacture, transport, and construct, so it has been well applied. In recent years, th...

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Problems solved by technology

[0005] Although this string truss structure in the prior art has many advantages, there are still several relatively big problems: (1) the string truss structure is a kind of wind load sensitive structure, and for modern long-span buildings, generally With the string truss structure of the light roof system, in areas with large wind loads or typhoon areas, under the action of wind suction, the lower string cables may relax or be compressed and quit working, and the self-balancing system does not exist, and the safety degree loss, so it is often necessary to prepare the roof to ensure that the structure does not lose stability and safety under the action of wind suction, so the existing string truss structure is not suitable for the effect of wind suction; (2) the lower chord of the string truss in the prior art The cable ball is formed of cast steel, which requires special processing and is difficult to make into a standard part; (3) The lower part of the string tension truss in the prior art only has the cable ball, and the lower string node should have a device to control the left and right movement of the cable ball during tension, and it must To ensure that the cable ball produces upward displacement, the number of construction auxiliary equipment increases, and the construction is more difficult

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