A deformation monitoring method of elastic support plate based on strain monitoring

Abstract

The invention discloses a deformation monitoring method of an elastic supporting plate based on strain monitoring. By adoption of the method, the deformation monitoring theory of beams is extended tothe deformation monitoring of two-dimensional plates, and the monitoring theory of bending deformation of the plate is deduced. The method comprises the following steps: obtaining strain data of theplate by using a strain sensor, approximately assuming a strain function of the plate under an edge elastic supporting boundary condition, substituting strain measurement results of different positions into the strain function to obtain parameters of the strain function, and obtaining a displacement function through a strain-displacement transformation relationship to figure out a bending deformation value of the plate; and calculating the bending deformation of the plate at each moment by calculating the strain at each moment, so that the dynamic monitoring of the bending deformation of the plate can be realized. By adoption of the deformation monitoring method disclosed by the invention, the bending deformation of the plate can be monitored at lower cost by simple equipment on the premise of ensuring the precision, thereby having important theoretical significance and engineering application value for the structure health monitoring, structure safety evaluation, etc.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a deformation monitoring method of an elastic support plate based on strain monitoring, and the monitoring result is used to evaluate the use state and safety performance of the elastic support plate. Background technique [0002] In civil engineering, slab structures include floors, balconies, bridge decks, foundations, etc. When external forces act on the slab, the slab will deform, and these deformations may affect the safety and durability of the slab structure. Therefore, the slab Deformation monitoring is necessary in some structures. In the construction and operation of some projects, deformation monitoring is required, and the basic theories of various types of plates are also constantly being developed and improved. For thin plates with small deflection, the classical thin plate theory based on Kirchhoff straight normal assumption is the most commonly used and...

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Problems solved by technology

Among the commonly used numerical methods, the finite element analysis method is more effective for the deformation prediction of the plate, but the calculation of this method is relatively complicated, the calculation amount is large and the time-consuming is long, and to obtain high-precision values, too many elements need to be divided, which is There may be large calculation errors

In the practical application of civil engineering, most of the measurement methods for plate deformation are non-real-time monitoring, and the monitoring methods for plate structures are still relatively scarce. For elastic support plates in the field of civil engineering, there is currently no applicable deformation monitoring method

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