Multiscale Finite Element Analysis Of The Typical Column And Tie Wooden Construction Buildings In Villages And Towns

Column and tie wooden construction is a kind of Chinese wooden structure which occupies an important position in the history of Chinese architecture.Today,column and tie wooden construction buildings are also common in villages and towns in the southern region of China.In recent years,earthquakes have occurred frequently in China.Column and tie wooden construction buildings were damaged to varying degrees during the earthquake which influent the safety of people’s lives and property.It is imminent to establish anti-collapse design specifications for village-town column and tie wooden construction.In China,the current numerical simulation research on wooden structures has not yet formed a mature system.As an important part of the formation process of the column and tie wooden construction anti-collapse design specification,a reliable finite analysis method for the column and tie wooden construction system needs to be formed.In this paper,a refined finite element model of the column and tie wooden construction was established based on the finite element analysis software ABAQUS.Single parameter analysis was made on the frame of the column and tie wooden construction.Established a macro-finite element model analysis method of the column and tie wooden construction based on OPENSEES.The main research content can be divided into the following parts:(1)Determined the constitutive model of wood.Wrote ABAQUS user material subroutine VUMAT to describe wood constitutive model based on strength characteristics and damage evolution model of wood.Used simple elements to verify the reliability of the wood constitutive model subroutine and the ABAQUS/Explicit quasi-static analysis method;(2)Used ABAQUS finite element analysis software to establish the refined finite element analysis method of the column and tie wooden construction.Refined finite element analysis of two types of the mortise-tenon joints and the column and tie wooden construction frames which have been tested.Compared the force mechanism,failure mode,hysteresis curve,skeleton curve by comparing test results,engineering constant constitutive model calculation results,and VUMAT constitutive model calculation results.So that could verify the reliability of the refined finite element analysis method.The results obtained were basically consistent with the test results,better than the engineering constant calculation results.So the reliability of this method was proved.(3)Used the established refined analysis method of the column and tie wooden construction to do single parameter analyze on the parameters affecting the seismic performance of the mortise and tenon joint nodes of the column and tie wooden construction.Obtained sensitive parameters that affect the seismic performance of the mortise and tenon joint nodes of the column and tie wooden construction and verified it.(4)Using OPENSEES to establish the finite element analysis method of the column and tie wooden construction macro model.Used a single-span column and tie wooden construction frame example for verification.Compared macro model calculation results,refined model calculation results and test results by comparing hysteresis curve and skeleton curve.Explored the reliability of the macro model.The obtained results were basically consistent with the experimental results and refined model calculation results...