Production method of experimental test piece for evaluating safety performance of reinforced steel structure

Abstract

The invention discloses a production method of an experimental test piece for evaluating the safety performance of a reinforced steel structure. The production method comprises the following steps: (1) selecting an H-shaped steel structure, a carbon fiber plate and anadhesive; (2) selecting monitoring instruments including a grating and optical fiber sensor, a displacement meter and a plurality of resistance strain gauges mainly; (3) bonding the carbon fiber plate on the bottom surface of the H-shaped steel structure by the adhesive, and supporting the lower surface of the H-shaped steel structure by a simple support, arranging a distributing girder for loading pressure on the upper surface of the H-shaped steel structure, and connecting the simple support between the distributing girder and the H-shaped steel structure; and (4) arranging the displacement meter on the top surface of the H-shaped steel structure, bonding the grating and optical fiber sensor on the upper surface and the lower surface of the H-shaped steel structure, and bonding the resistance strain gauges on the top flange, the bottom flange and a web of the H-shaped steel structure respectively. According to the production method, the security state of the real reinforced steel structure can be accurately simulated; and besides, the production method can be operated simply, the system is improved and the experimental requirements are met.

Description

technical field [0001] The invention relates to the field of performance testing of building materials, in particular to a method for making an experimental specimen for evaluating the safety performance of a reinforced steel structure. Background technique [0002] At present, in the process of urbanization, there are a large number of buildings that urgently need to be reinforced. Many factors lead to the accelerated aging of buildings, making them lose their original serviceability. For steel structures, corrosion, lack of effective maintenance, and local fatigue sensitivity are the most important factors affecting performance. In addition, the deterioration of the environment, the aging of structural components, the lack of sufficient detailed design during design or construction, and the use of substandard materials will affect its applicability to varying degrees. Therefore, in order to solve the above problems, we urgently need to find a reasonable and effective mea...

AI Technical Summary

Problems solved by technology

[0003] The structure strengthened by prestressed CFRP, CFRP often becomes the "lifeline" of the reinforced structure. To evaluate the safety status of the steel structure reinforced by prestressed CFRP plate, it is necessary to focus on the actual force characteristics of the steel structure strengthened by prestressed CFRP plate , a corresponding evaluation index system has been established in an all-round way. At present, the preparation method of the test piece used in the simulation evaluation experiment of the safety performance of the reinforced steel structure is not perfect, and cannot meet the experimental evaluation requirements of the reinforced steel plate.