Plate-shell type large-span light-weight mechanized bridge structure

Abstract

The invention discloses a plate-shell type large-span light-weight mechanical bridge structure which comprises guide beams and a bridge body, modular sectional design is adopted, the length of each section is determined by factors in the aspects of carriers, the total length of the bridge body, calculation optimization results and the like, and bridge body transportation and rapid bridging are facilitated. The bridge body and guide beams are each of a transverse steel plate interlayer structure and a longitudinal steel plate interlayer structure. On one hand, the weight reduction requirement can be met, and on the other hand, the anti-bending section coefficient of the bridge body needs to be increased, the deformation requirement is met, the longitudinal steel plate sandwich structure bears main loads, the anti-bending coefficient is increased, the buckling stability is improved through the transverse steel plate sandwich structure, and the buckling safety coefficient can be increased.

Description

technical field [0001] The invention relates to the field of mechanized bridges, and is especially suitable for the field of disaster relief and emergency rescue that has requirements on the speed of bridge erection and the weight of the bridge body. Specifically, it refers to a lightweight mechanical bridge with plate-shell characteristics, modular design, and fast erection speed. Background technique [0002] In the process of disaster relief, time is the key factor restricting the survival rate of victims. Rescue experience for natural disasters such as earthquakes shows that the survival rate of people rescued within 24 hours is about 90%; the survival rate of people rescued within 24 to 48 hours drops to about 60%; The survival rate of those rescued within 72 hours is only about 30%. [0003] The use of large machinery can significantly improve rescue efficiency. However, natural disasters not only bring casualties and economic losses, but also often have varying deg...

AI Technical Summary

Problems solved by technology

[0004] The traditional truss-type mechanized bridge has been around for more than 70 years. It is mostly designed based on the classic beam element theory in material mechanics. In terms of weight reduction, it mostly depends on the improvement of material properties. It is difficult to make breakthroughs in structure.

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