Long-term monitoring method suitable for disturbance and deformation of wooden beams in ancient buildings

Abstract

The invention relates to a long-term monitoring method applicable to deflection deformation of the beam of a historic building. The long-term monitoring method is characterized by comprising building a finite element (beam columns and tenon-and-mortise nodes) model for a historic wooden building to be monitored by using finite element software and simulating deflection deformation of a beam; performing error analysis by using an improved conjugate beam method to determine the best unit partition quantity of the beam; dividing the beam to be monitored into units having equal length according to the best unit quantity, and then working out deflection deformation value of the beam by using a fiber bragg grating strain sensor and the improved conjugate beam method. According to the long-term monitoring method applicable to deflection deformation of the beam of the historic building, the used instruments are strong in corrosion resistance and stability; the method has small disturbance to the historic building, and is simple and convenient to operate, and unnecessary to learn physical characteristics of the wood structure, thus being applicable to monitoring deflection deformation of the wood structure of the historic building for a long time.

Description

technical field [0001] The invention relates to a long-term monitoring method for disturbance deformation of ancient building wooden beams, which is a technology for monitoring and early warning of wooden structure deformation based on fiber grating sensing technology and improved conjugate beam method. Background technique [0002] China's ancient buildings have experienced thousands of years of baptism, and in the long-term service process, it is inevitable that there will be excessive accumulated deformation. The deformation monitoring of ancient buildings is an important means to protect the precious historical and cultural heritage of ancient wooden structures. Based on the principle of protection of ancient buildings, in the actual monitoring, it is necessary to ensure that the use and appearance of ancient buildings are less disturbed, and the integrity of ancient buildings must be guaranteed. At the same time, due to the particularity of the environment in which anc...

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Problems solved by technology

At present, the monitoring methods commonly used in bridges and underground engineering have different limitations, such as: large instrument volume and operation interference, a large number of measuring points and restricted by terrain factors, poor durability of the instrument and too expensive

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