A complex single-layer concrete shell system with indirect prestressing

Abstract

This utility model relates to an indirect prestressed complex single-layer concrete shell system. The complex shell has a vertically upward-pointing bottom, a nearly horizontal cantilevered end, and a central section connected to a horizontal prestressed concrete closed beam to form a spatial structure. The horizontal closed prestressed beam supports the complex shell, and the application of prestress within the concrete closed beam creates indirect prestress, altering the constraint boundary conditions of the complex shell and changing the distribution and magnitude of internal forces. The prestressing tendons within the closed beam can be arranged in straight lines, broken lines, or curves, and the bonding methods for the prestressing tendons can be bonded, unbonded, or loosely bonded. This indirect prestressed single-layer concrete complex shell with a horizontal closed prestressed beam improves both the crack and bending resistance of the component and its deformation performance. Therefore, it is particularly suitable for large-span, large-cantilever shell structures with high deformation and load-bearing capacity.

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