Investigation On Seismic Behavior Of Fabricated Wall Embedded Structures

With the proposing of the latest target of macroeconomic control in country,the prefabricated building has become the trend of the building industry.As a result,the traditional way of building will be gradually replaced by industrial production.There are many wet connector node form used in existing fabricated structure,while few dry connector are in use.Researches of beam-column joints in fabricated structure are abundant and the technology is relatively mature.However,study of the connection between wallboard and main body structure still has much room for further development.This paper presents a new type of fabricated structure in power sector as the study object,whose connection between wallboard and column is achieved with embedded process,namely the side of the column has been grooved so that the wallboard can be easily embedded.Compared with the existing fabricated structure,the embedded fabricated wall structure has characteristics of clear force transmission,simple construction and few wet construction,etc.Seismic behavior of the embedded assembly wall structure is well worthy of an intensive study because relevant studies are very few.This paper aims to explore the seismic behavior of the structure by experimental study and nonlinear finite element analysis.The main contents include:1.Quasi-static test is carried out on a scaled model,which refers an existing fabricated industrial building as the prototype.Through a load pattern of low frequency cyclic in the horizontal direction,hysteretic behavior,failure mode,carrying capacity,deformation capacity and energy dissipation are obtained to achieve a study of the seismic behavior of the structure.Test results show,embedded fabricated wall structure has a fine hysteretic behavior and energy dissipation;the embedded fabricated wall enhances resist-lateral rigidity and the degradation of structural strength and stiffness appear slow;the model was destroyed by bending with a displacement ductility factor greater than 4,revealing that the embedded wall can improve the structural mechanical behavior and the ultimate bearing capacity appears higher than a normal framework;each column bears large torque because of the eccentricity between axis of embedded wall and column,so the antitorque design should be taken into considered in practical engineering.2 Numerical simulation of the experimental model is achieved by the finite element software of ABAQUS.Appropriate parameters are adopted to establish the finite element model for a nonlinear analysis,in which the load-displacement curve and stress distribution of the model are obtained.Comparative analysis between numerical analysis results and test results is performed,which proves the accuracy of the finite element model.3 Design parameters of such structures are discussed based on the finite element model.It is found that: the increase of friction coefficient can enhance the supporting effect of wallboard to framework;the increase of the axial compression ratio within a certain range,the bearing capacity of the structure is improved;the structural measures of using capping beam and wall alveolus can improve the structural integrity in practical engineering.