A prestressed cable truss bridge for pedestrians in mountainous rural areas

Abstract

The invention discloses a pedestrian prestress cable truss bridge in a mountainous rural area. The pedestrian prestress cable truss bridge in the mountainous rural area comprises a cable truss, cable towers, concrete anchors and a bridge deck system which is connected with bridge deck cables; the cable towers and the concrete anchors are arranged at two ends of the cable truss; the cable truss comprises the bridge deck cables, main ropes and hanging rods; the main ropes and the hanging rods are hung above the bridge deck system; the bridge deck system comprises a plurality of beams which are arranged in a parallel mode; the adjacent two beams are connected through a plurality of longitudinal beams; two ends of the beams are connected with the main ropes through the hanging rods; the bridge deck cables which are corresponding to the main cables are arranged at the bottom of the beams; two ends of the bridge deck cables and cable tower foundations which are arranged at two ends of the cable truss are anchored. According to the pedestrian prestress cable truss bridge in the mountainous rural area, the traditional pedestrian cable truss bridge is changed into a spatial cable truss force bearing structure, the bridge deck cables are in upwarpping linear shapes due to the handing rod adjustment, primary stress is applied, so that the whole bridge has good integrity, stiffness and stability against overturning.

Description

technical field [0001] The invention belongs to the technical field of traffic bridge engineering, and in particular relates to a pedestrian prestressed cable truss bridge in rural areas in mountainous areas. Background technique [0002] my country's mountainous area is about 6.636 million square kilometers, accounting for 69.1% of the country's total land area. Most mountainous areas have high mountains and deep valleys, dangerous terrain, scattered population, and backward transportation. In order to solve the travel problem, there are many various pedestrian cable bridges with simple structure, strong spanning ability, easy construction and economical application. As a common type of bridge in mountainous areas, pedestrian cable bridges are widely used because of their short construction period and low cost. [0003] The cable bridge is a slender structure supported by flexible cables. It has unique advantages such as large spanning capacity and beautiful appearance. I...

AI Technical Summary

Problems solved by technology

The main reason is that the structure of the current pedestrian cable bridge is unreasonable: most of the pedestrian cable bridges are too small in stiffness, and the structural deformation is too large under live load and other excitations, and the up and down vibration or left and right swaying is obvious; Light and its own stiffness is weak, the bridge deck suspended in the air has poor self-stabilization ability, and it is easy to cause the bridge deck to overturn under large wind load or lateral eccentric load

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