Prestress truss structure

Abstract

The invention belongs to the field of building structures, and particularly relates to a prestress truss structure. The prestress truss structure comprises two upper-chord trusses, wherein a pluralityof secondary trusses are arranged between the two upper-chord trusses, the lower part of each upper-chord truss is provided with a plurality of bracing rods and a pair of lower-chord inhaul cables, and the lower-chord inhaul cables are in a upwards convex form; two sides of the upper-chord truss and secondary truss are respectively provided with a triangular concrete oblique column, a plurality of pairs of oblique inhaul cables are arranged between the concrete oblique column and the upper-chord truss, the lower-chord inhaul cable is connected with an arch-shaped truss by virtue of an anchor,the oblique inhaul cable is connected with the concrete oblique column by virtue of the anchor and the arch truss, and the upper end and the lower end of the bracing rod are respectively connected with the upper arch truss and the lower-chord inhaul cable. By adopting the pretress truss structure provided by the invention, the failure of the lower-chord inhaul cable under the condition of heavy wind can be prevented, the structure rigidity can be prevented from being reduced sharply, the excessive deformation can be prevented, and the damage situation can be prevented; and the structural rigidity can be improved, so that the structural span is greatly increased, and the operation space requirements of multiple bucket wheel machines in coal shed yards can be met.

Description

technical field [0001] The invention belongs to the field of building structures, and in particular relates to a prestressed truss structure. Background technique [0002] According to the national technology and environmental protection requirements, the newly built coal yards and a large number of existing coal yards need to be closed and transformed to avoid coal loss and environmental pollution in bad weather. The stress cable-stayed structure just meets the space requirements when several bucket turbines work together. [0003] The existing tension trusses include an upper chord truss, several pairs of braces and a pair of lower chord cables. The upper chord trusses are connected by secondary trusses. The deflection will be reduced, and through the tension of the lower chord, the strut will generate an upward component force, causing the upper chord truss to produce an internal force and deformation opposite to that under the external load, so as to form the entire ten...

AI Technical Summary

Problems solved by technology

However, with the expansion of the coal storage yard, the span of the dry coal shed structure continues to increase. In order to meet the rigidity required for the span, the upper chord arch truss needs to be increased by increasing the arch height, increasing the thickness, or increasing the section specification. If the bottom string force is large, if it is located in a strong wind environment such as plains and coastal areas, in order not to make the bottom string quit working, the overall stiffness of the structure will be reduced, the structure will be deformed, or even destroyed, and the bottom string force must be increased to resist wind suction. , the results of the above methods will lead to an increase in steel consumption

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