Study On Seismic Performance Of Fabricated Lattice Wallboard

At present,with the vigorous development of prefabricated buildings,it is a common choice for the filling wall of RC frame to adopt prefabricated wall panels.However,the interaction between prefabricated wallboard and RC frame is very complex under earthquake,and the influence on RC frame cannot be ignored.Therefore,it is particularly important to actively explore the prefabricated wallboard with light weight,high strength and excellent performance.In order to solve the problem of infilled walls in prefabricated buildings,this paper designs a new type of prefabricated lattice wallboard based on the existing research,which has the advantages of light weight,energy saving and environmental protection,and excellent seismic performance,and conforms to the development trend of building industrialization.However,as a new type of wallboard,the influence of wallboard on seismic performance of RC frame is still unclear.In order to fully understand the influence of prefabricated lattice wall panels on the seismic performance of RC frame structure,one empty frame specimen and three RC frame specimens with lattice wall panels were designed and fabricated.The quasi-static test was carried out on four specimens,and the test results and failure modes of the four specimens were analyzed.The seismic performance parameters such as force-deformation characteristics,failure mode,stiffness degradation and energy dissipation capacity were compared and analyzed.The finite element simulation of the specimen is carried out by ABAQUS software,and different parameters are set to analyze the seismic performance.The corresponding conclusions are obtained.The test and simulation results show that :（1）The pseudo-static test shows that the concrete surface layer on both sides of the fabricated lattice wall plate can work together with the internal dark frame,and the deformation is consistent under low cyclic loading.The failure modes of the three frame filled wall specimens with lattice wall plate are basically the same.The compatibility between the wall plate and the frame is good,and the filled wall effectively delays the cracking of the frame.The hysteresis curves of the four specimens are basically similar.The positive and negative directions of the hysteresis curves of each specimen are basically symmetrical,and the energy dissipation performance of the specimen is good.The specimens have experienced the elastic stage,the elastoplastic stage and the failure stage.（2）The bearing capacity of the frame is greatly improved by the filling of the lattice wall plate,and the bearing capacity of the specimen increases with the increase of the surface thickness;the addition of lattice wall panels can increase the stiffness of the frame.It can be seen that the addition of infilled walls affects the stiffness of RC frame to a certain extent.The fabricated lattice wall panels have little effect on the stiffness of the frame,and the stiffness of the specimen increases gradually with the increase of the surface thickness.The ductility of RC frame decreases with the filling of lattice wall,and the ductility decreases with the increase of the thickness of the filling wall.RC frame specimens with latticed infill walls have certain energy dissipation capacity,which is better than pure frame specimens.（3）The ABAQUS finite element software is used to select the appropriate material constitutive,and the finite element model of the four specimens is established and calculated.The failure mode and seismic performance of the specimens are basically the same as the experimental results.The validity of the finite element model is verified,and the constitutive selection is reasonable and reliable.Based on the experimental results and ABAQUS simulation,the research contents and contents of this paper are summarized completely.（4）Parametric analysis of lattice wall panel filled wall frame is carried out by using ABAQUS finite element software to explore the seismic performance under different axial compression ratio,different concrete strength and different steel bar diameter,and the corresponding conclusions are obtained : when the axial compression ratio of the specimen increases,the bearing capacity of the specimen will also increase accordingly;when the concrete strength of the specimen increases,the bearing capacity of the specimen will also be significantly improved.With the increase of reinforcement diameter,the peak bearing capacity of specimen increases.Figure [98] table [8] reference [65]...