A method for determining internal force of a building structure node analysis rod piece

Abstract

The invention provides a method for determining the internal force of a building structure node analysis rod piece. The method comprises the following steps: step 1, carrying out overall structure analysis by adopting a reaction spectrum method; Step 2, extracting the stress of related components in the node region by a spectrum method; Step 3, determining a node area control rod piece; Step 4, carrying out overall structure analysis on the seismic elasticity time history; Step 5, determining an elastic time history working condition according to the control rod piece; 6, carrying out internalforce combination of the joint rod pieces under the elastic time-history working condition; And step 7, performing finite element analysis on the nodes according to the determined internal force of the rod pieces. the actual stress mechanism of the node area under the earthquake action is analyzed according to the relevant regulations of the current specification on the anti-seismic design; the internal force of the rod piece during node area analysis, namely the force boundary condition of finite element analysis, is determined, so that after the relative boundary is determined, the internalforce of the related rod piece is closer to the internal force of the related rod piece in the whole model, and the accuracy of node calculation in the establishment of a structure analysis model andthe analysis and calculation process is improved.

Description

technical field [0001] The invention belongs to the field of architectural design, and in particular relates to a method for determining the internal force of a building structure node analysis bar. Background technique [0002] In structural analysis, boundary conditions and loads are the two most important factors affecting the authenticity of the model and the accuracy of the analysis results. This is true in the overall analysis of the structure, as well as in the detailed analysis of nodes and so on. The difference is that in the overall analysis of the structure, the boundary conditions and loads are relatively clear and easy to determine, while in the nodal analysis, the boundary conditions need to be deduced from various assumptions in the overall model, and the loads include the actions in the The external load on the node and the internal force components of the members connected to it. Because node analysis is a detailed analysis of a particular component, a mor...

AI Technical Summary

Problems solved by technology

[0010] Due to the contradiction between the unbalanced member internal force calculated by the response spectrum method and the need for the internal force balance of the member in the node analysis, if the internal force of the member calculated by the response spectrum method is directly used for the finite element analysis of the node, after the relative boundary is determined, the internal force of the relevant member The internal force of related members in the overall model is quite different, which affects the accuracy of node calculation

Images