Finite element modeling method for integral structure of timber construction of ancient building

Abstract

The invention discloses a finite element modeling method for an integral structure of a timber construction of an ancient building. The method is characterized by comprising the following steps of: (1) simulating bearing components, such as a beam column and the like, by a beam unit; (2) simulating a cornice through a beam-short column unit; (3) simulating semi-rigid characteristics of the beam column and a column bottom joint through an equivalent (beam) unit; (4) reflecting structure deformation by moving a column frame joint position; (5) selecting wood property of aged material as a model wood property parameter to represent degradation of the wood property; (6) describing degradation degree of mechanical performance of the column frame joint by setting a mechanical performance degradation index; (7) based on a modal parameter model modification theory, solving the degradation index of model joint mechanical performance through a genetic algorithm. The method has the advantage of being capable of forming an integral model capable of representing mechanical characteristics and damage of the ancient timber construction, and solving the defect that the model formed by the existing method cannot roundly reflect the characteristics such as a force transmission path of the cornice, the semi-rigid characteristics of the column frame joint, the degradation of the mechanical performance, and the like. The method provided by the invention needs to be realized with the graphics software AutoCAD, the programming software Fortran and the element finite software (such as ANSYS and ABAQUS and the like).

Description

technical field

[0001] The invention relates to the finite element modeling method of the whole structure of the wooden structure of ancient buildings, especially the modeling of the semi-rigid characteristics of its joints. Background technique

[0002] Chinese ancient architecture is an important part of Chinese civilization and a precious cultural heritage of mankind. Its influence reaches as far as Japan, South Korea and other East Asian countries. Among them, the largest number and the most distinctive ones are ancient wooden structures, such as the Sakyamuni Pagoda of Fogong Temple in Yingxian County (built in 1056 AD) and the Guanyin Pavilion of Dule Temple in Jixian County (built in 984 AD). With the continuation of time, the protection of these priceless historical relics that are lost and cannot be recovered is becoming more and more urgent. The finite element analysis of the overall structure combined with the results of field pulsation tests is an important mean...

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