Calculation and analysis method for bearing, deformation and energy consumption of annular mesh in flexible protection system

Abstract

The invention discloses a calculation and analysis method for bearing, deformation and energy consumption of annular mesh in a flexible protection system. The method comprises the following steps: (1)determining geometrical parameters of the annular mesh, a sleeving mesh ring and a coiled steel wire; (2) determining the loading rate, the loading area and the boundary condition of the annular mesh; (3) obtaining basic mechanical parameters of the material through a test, and an annular mesh critical failure criterion is established; (4) establishing an annular mesh equivalent calculation modelbased on a spring-fiber unit; and (5) solving bursting displacement, bursting load and energy consumption of the annular mesh. According to the method, force flow equivalent calculation assumption isadopted, a calculation model can reveal distribution characteristics of a weak area borne by the mesh, the radial loop chain tension characteristics of the mesh in the bursting limit state are reflected, and three quantitative indexes for evaluating the safety performance of the annular mesh under the influence of multiple factors are obtained.

Description

technical field [0001] The invention relates to a calculation and analysis method of an annular mesh in a flexible protection system, belongs to the field of slope protection engineering, and in particular relates to a method for calculating the limit load, deformation and energy consumption of an annular mesh of a flexible protection net. Background technique [0002] In recent years, due to the comprehensive influence of human factors such as road construction and slope cutting, excessive mining, and natural factors such as heavy rain and extreme precipitation, geological disasters such as landslides, rockfalls, landslides, and mudslides have occurred frequently in the southwestern and southeastern hills and mountains of my country, as well as in the northwest. It has caused great hidden dangers to the safety of people's lives and property. As a new type of interception structure, the flexible protection system is widely used in the field of earthquake protection. The flex...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a calculation method for the limit load, deformation and energy consumption of the ring mesh of the flexible protective net, which can solve the problem of the lack of quantitative description methods for the safety performance evaluation and design selection of the intercepting mesh in the existing flexible protective net system, In order to ensure that the protective net intercepting mesh can meet the protection ability required by its design

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