Analysis system and analysis method for overall fire resistance of beam-post wood structure frame

Abstract

The invention discloses an analysis system and an analysis method for overall fire resistance of a beam-post wood structure frame. The analysis system comprises an actual fire simulation module, a structure interior finite element heat transfer analysis module and a structural field finite element analysis and calculation module, wherein the actual fire simulation module is used for generating a simulated fire working condition corresponding to the actual fire working condition in the beam-post wood structure frame; the structure interior finite element heat transfer analysis module is used for acquiring interior temperature distribution of the wood structure under the simulated fire working condition generated by the actual fire simulation module; the structural field finite element analysis and calculation module is used for loading the wood structure so as to acquire structural deformation and damage. With the adoption of the analysis method for fire resistance of the beam-post wood structure frame, fire development, structural interior heat transfer and structure response in the fire development process are simulated, quick analysis of deformation and damage development of the structure in the fire bearing process is realized, visualization can be realized, the method has the characteristics of low cost and conciseness, and practical value is provided for fire performance design and fire risk assessment of the wood structure.

Description

technical field [0001] The present invention is a fire-resistant design method for a beam-column wooden structure frame in the technical field of civil engineering. Specifically, it solves the fire-resisting problem of a beam-column wooden structure frame by means of numerical simulation, and provides for the fire prevention design of an actual wooden structure. help. Background technique [0002] With the recent development and wide application of forestry resources, domestic scholars have begun to research and explore the fire resistance of commonly used tree species in my country. Wood is a mixture of cellulose, hemicellulose and lignin and other high molecular organic matter, water and inorganic salts and other inorganic substances. Compared with other building materials, its main disadvantage is that it is flammable. Once wood is burned, it releases A large amount of heat is released to accelerate the development of the fire, causing greater casualties and property los...

AI Technical Summary

Problems solved by technology

However, in the traditional fire protection design codes, the structural fire resistance design method based on component tests is mainly used, and the mutual influence of the overall components of the wooden structure has not been considered. real stress situation

At the same time, the traditional fire resistance is based on the standard temperature rise curve to simulate the fire temperature rise process. Many scholars use combustion furnaces to test the fire resistance performance of components or structures. This is quite different from the actual fire temperature rise process, so it is impossible to accurately simulate and analyze the structure. fire response

[0004] The shortcomings of the current research on the fire resistance of beam-column timber frames are: 1. The lack of accurate evaluation and calculation methods for timber frames under actual fire conditions; 2. The structural analysis lacks calculation and analysis based on the space as a whole; 3. Although many scholars have proposed the idea of ​​systematic design, it is still necessary to design a more reasonable calculation method for beam-column timber structures

Images