Arch rib face internal multi-point restrained and distributed tied-arch bridge

Abstract

The invention discloses an arch rib face internal multi-point restrained and distributed tied-arch bridge. A plurality of longitudinal beams connected with an arch rib are arranged below the arch rib, and thus a tie bar capable of resisting constant and live load action of the arch rib and balancing the horizontal thrust in a distributed mode is formed. Vertical stand columns and diagonal web members are arranged on the longitudinal beams and connected with the bottom face of the arch rib, an elastic restraint supporting system is formed in the surface of the arch rib, and thus the integral rigidity and strength of the arch rib are enhanced. Compared with a span arch bridge, the arch rib face internal multi-point restrained and distributed tied-arch bridge has smaller midspan arch rib bending moment and smaller arch springing horizontal thrust, has higher arch rib stability and higher stable bearing capability, and has smaller midspan deformation, and thus travel comfort is improved; in addition, the workload and cost for foundation construction are reduced.

Description

technical field [0001] The invention belongs to a tie-bar arch bridge, in particular to a multi-point constrained and distributed tie-bar arch bridge in the arch rib plane. Background technique [0002] Tied arch bridge is a combination of two basic structural forms of arch and beam, which jointly bear the load, give full play to the structural performance and combined effect of beam bending and arch compression, and the horizontal thrust of the arch end is supported by tie rods, so that the arch end support No horizontal thrust is produced. At present, during the operation of arch bridges with concrete as the main material, under the action of temperature, vehicle load and other loads, transverse bridge cracks often appear in the mid-span of arch ribs, and a few have obvious downward deflection in the mid-span. Significantly decreased. [0003] In the prior art, such as the Chinese patent CN1483895A, a tie-bar arch bridge integrated with urban roads is designed. The tie-b...

AI Technical Summary

Problems solved by technology

At present, during the operation of arch bridges with concrete as the main material, under the action of temperature, vehicle load and other loads, transverse bridge cracks often appear in the mid-span of arch ribs, and a few have obvious downward deflection in the mid-span. Significantly decreased

[0003] In the prior art, such as the Chinese patent CN1483895A, a tie-bar arch bridge integrated with urban roads is designed. The tie-bar arch bridge is provided with stiffened longitudinal beams and beams, and the stiffened longitudinal beams are applied longitudinal prestress to overcome the constant and live loads. The horizontal thrust of the arch rib, this method uses more materials, increases the cost of foundation construction, and is not easy to construct the old bridge; Chinese patent CN101638883A designs an arch bridge, and the arch bridge is provided with multiple load-transferring bridges between the bridge deck and the arch ring The components that transmit the load extend radially from the arch ring to the bridge deck to reduce the mid-span bending moment. This method increases the bending moment of the bridge deck and reduces the driving comfort.

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