A method for measuring residual flexural capacity of wooden beams in ancient buildings

Abstract

The invention relates to a method for measuring the residual flexural bearing capacity of wooden beams of ancient buildings, belonging to the technical field of wood science and engineering. Carry out physical and mechanical performance tests on standard small test pieces of ancient buildings, and obtain the average value of micro-drilling resistance value, stress wave propagation velocity and flexural strength of standard small test pieces, and use them as independent variables to perform regression analysis on the above bending strength , get the fitting parameter value, obtain the non-destructive testing data of the ancient building wooden beams to be tested through on-site testing, and substitute the non-destructive testing data into the regression equation to obtain the corresponding flexural strength of each interval, and then Obtain the flexural bearing capacity of the wooden beams of the whole ancient building. The method of the invention can accurately, effectively and quantitatively calculate the residual flexural bearing capacity of full-scale wooden beams of ancient buildings, and the measurement results can provide reliable data support for the formulation of wooden structure protection and repair schemes of ancient buildings.

Description

technical field [0001] The invention relates to a method for measuring the residual flexural bearing capacity of wooden beams of ancient buildings, belonging to the technical field of wood science and engineering. Background technique [0002] At present, due to the portability, test range applicability and operability of non-destructive resistance meters and stress wave test equipment, they are widely used in the detection and exploration of the remaining mechanical properties of wooden beams in ancient buildings. But there are certain limitations, and there are the following problems: (1) The development of destructive tests. Due to the heritage properties of ancient buildings, the raw materials available for testing the mechanical properties of full-scale wooden beams are very limited, resulting in the qualitative evaluation of the remaining bending resistance of full-scale wooden beams of ancient buildings by relying only on non-destructive resistance test and stress wav...

AI Technical Summary

Problems solved by technology

But there are also some limitations, and there are the following problems: (1) The development of destructive tests

For wooden beams of ancient buildings, single-interval stress wave test and impedance meter test results are often used to evaluate the mechanical properties of wooden beams of ancient buildings, that is, only a pair of stress wave test points are included along the longitudinal direction of the full-scale wooden beam, or the full-scale The average resistance value at the cross-sectional height of the wooden beam represents the resistance value of the entire wooden beam, resulting in a large error between the single-interval prediction results and the actual density, elastic modulus, and bearing capacity of the full-scale wooden beam

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