A member for axial force testing of in-service long-span structural rods

Abstract

An axial force test component of a long-span structural rod in service, including a support seat, a support beam, a cantilever beam, an optical fiber grating, and an adapter block; the support seat is welded to the inner surface of the rod to be tested, and one end of the support beam is connected to the Plug and connect, the supporting beam is parallel to the rod to be tested, one end of the cantilever beam is welded and fixedly connected to the other end of the supporting beam, the cantilever beam is perpendicular to the supporting beam, and one end of the adapter block is screwed and fixedly connected to the other end of the cantilever beam. The inner surface of the measuring rod is welded and fixed to the other end of the adapter block, the fiber grating is fixed on the upper surface of the cantilever beam, and the fiber grating is parallel to the cantilever beam. The present invention is installed inside the rod to form an integral structure with the rod body, and the installation can be completed in the processing and production stage of the rod, avoiding the installation method of high-altitude operation, and external environmental factors such as bad weather are difficult to affect the axial force test member, which improves the work of the present invention Stability and service life. The invention is additionally equipped with a piezoelectric sensing device, which can monitor the strain of the long-span structural member under dynamic load.

Description

technical field [0001] The invention belongs to the technical field of building structure health monitoring, and in particular relates to an axial force testing member of a long-span structural bar in service. Background technique [0002] In recent years, long-span structures have developed rapidly and should be widely used in iconic buildings such as the Bird's Nest and the Water Cube. However, due to the complex construction engineering and long life cycle of long-span structures, the health monitoring of long-span structures is very important. [0003] For construction projects with long-span structures, long-term tracking and monitoring should be carried out from the construction stage, and in the service stage, due to the long-term working conditions of the long-span structure, important components of the long-span structure are prone to damage and other special circumstances. Therefore, in order to effectively monitor the health of the entire long-span structure, the...

AI Technical Summary

Problems solved by technology

However, the above-mentioned various sensors used to monitor the axial force of the rods are all installed on the surface of the rods after the rods are lapped and assembled. It is realized through a large number of high-altitude operations, which are difficult and labor-intensive, and because the sensors are directly installed on the surface of the rod, external environmental factors such as bad weather will have a negative impact on the working stability and service life of the sensor.

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