An experimental device for the durability of multiple frp bars under the action of marine environment and tensile stress

Abstract

The invention provides an experimental device for the durability of multiple FRP (Fiber Reinforced Plastic) rebars under the action of a marine environment and tensile stress. The experimental device consists of a positioning device, an adjusting device, a loading device, background monitoring equipment and temperature controlling equipment, wherein the positioning device is used for positioning a test piece into the experimental device; the adjusting device is used for adjusting an initial stress state and a final stress state of the FRP rebars, and the stresses borne by the multiple FRP rebars are enabled to be identical; a tension sensor is used for transmitting data of stress borne by the test piece to a computer terminal, so that stress conditions of the FRP rebars are favorably adjusted; the temperature controlling equipment is used for adjusting and maintaining the temperature of seawater. According to the experimental device provided by the invention, the long-time same tension can be simultaneously provided for the multiple FRP rebars under the marine environment; in addition, after the test piece creeps, force borne by the test piece can be adjusted, and the tension borne by the test piece is always maintained in a required state.

Description

technical field [0001] The invention relates to a durability test device for multiple FRP tendons under the action of marine environment and tensile stress, and belongs to the field of durability testing. Background technique [0002] At present, our country is in a period of large-scale capital construction. Due to the advantages of concrete structure in terms of materials, cost and maintenance, it has always occupied an absolute dominant position in civil engineering, and is widely used in major civil engineering (large-scale construction engineering, bridge engineering, hydraulic engineering and port engineering). However, the traditional reinforced concrete structure will produce cracks in the process of use. When encountering seawater or salty snow or corrosive vapor liquid, the steel bars will rust, which will lead to the decline of the load-bearing capacity of the entire reinforced concrete structure and even the structure destruction. When there is a high-frequency...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing experimental device can only provide tension to one FRP tendon at a time, which will cause unnecessary errors in the experiment that needs to provide tension to multiple FRP tendons, and provide a An experimental device for the durability of multiple FRP tendons under the action of marine environment and tensile stress. The invention can simultaneously provide the same tensile force to multiple FRP tendons in a simulated marine environment, improve experimental efficiency, and reduce experimental errors

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