A saddle-shaped space prestressed ring beam

Abstract

The invention relates to a saddle-shaped spatial pre-stressed ring beam. The saddle-shaped spatial pre-stressed ring beam consists of an inner ring beam, an outer ring beam and radial beams, wherein the inner ring beam is connected with the outer ring beam through the radial beams; the inner ring beam is a multi-span uniform-section continuous variable-elevation pre-stressed concrete beam; the outer ring beam is a multi-span uniform-section continuous variable-elevation reinforced concrete beam; the radial beams are single-span uniform-section horizontal reinforced concrete beams; curve pre-stressed tendons, straight-line pre-stressed tendons and regular reinforcements are arranged in the inner ring beam in a ring-shaped manner; the pre-stressed tendons and the regular reinforcements of the inner ring beam are arranged in the way that after arrangement of the regular reinforcements, the straight-line pre-stressed tendons are uniformly arranged along the periphery of the beam section at first within the range of a reinforcement cage formed by the regular reinforcements, and then the curve pre-stressed tendons are arranged between the straight-line pre-stressed tendons at the top layer; the inner ring beam and the outer ring beam are connected with a lower concrete structure through cast-in-place reinforced concrete beam-column joints; a cable-membrane structure and a spatial saddle-shaped ring beam are connected through a sliding hinged support; and the sliding hinged support realizes radial horizontal constraint release and circumferential horizontal constraint preservation.

Description

technical field [0001] The invention belongs to the technical field of structural engineering prestressing, in particular to a saddle-shaped spatial prestressing ring beam. Background technique [0002] With the construction of a large number of long-span spatial structures, the application of prestressed beams has gradually increased. In civil building structures, prestressed ring beams are generally used in circular buildings, and prestressed ring beams are mostly on the same horizontal plane. After such ring beams are formed as a whole, they have greater rigidity. After increasing the prestressed There will be no redistribution of large internal forces and no secondary bending moments on ring beams and other structures. However, the saddle-shaped space prestressed ring beam is a multi-span and equal-section continuous variable-elevation prestressed concrete beam. Although the appearance is beautiful and the force transmission is clear, the overall stiffness of the saddle...

AI Technical Summary

Problems solved by technology

[0003] In view of the shape characteristics of the saddle-shaped space structure and the circumferential horizontal force transmitted from the cable-membrane structure supported by the saddle-shaped space ring beam, the saddle-shaped space ring beam has insufficient rigidity and has a large tensile force and bending moment. A saddle-shaped space prestressed ring beam

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