Experimental Study On Seismic Performance Of Fabricated Hollow Lattice Wall Panels

The prefabricated building structure is widely recognized by the construction market for its advantages such as high degree of prefabricated components,controllable cost,short construction period and resource saving.The infill wall plays the role of enclosure and separation in the building,and has flexible space utilization.At the moment when the prefabricated building is vigorously developed,the infill wall RC frame structure has a broad application prospect.As a non-structural component,infill walls are generally not considered to be included in the structural stiffness calculation during design.However,the infill wall and the frame affect each other.The previous earthquake damage results show that the infill wall has suffered serious damage in the earthquake,which not only threatens the safety of people’s lives and properties,but also increases the cost of post-disaster house repairs.Therefore,the interaction between the frame and the infill wall cannot be ignored,and it is necessary to develop new lightweight and better performance infill wall panels.In this paper,a new type of prefabricated hollow lattice wall panel is proposed.The reinforced concrete transverse and longitudinal rib beams are used as the structural framework,and the surface of the rib beams is compounded with reinforced concrete panels with steel mesh.,sound insulation,fast installation and other advantages,has a good application prospect.In order to study the effect of hollow lattice wall panels on the seismic performance of reinforced concrete frames,a total of 4 specimens were designed and fabricated.Through tests and simulations,the seismic performance of the structure,such as failure mode,bearing capacity,hysteresis curve,and stiffness degradation,is analyzed.The main research work and results of the paper are as follows:（1）The low-cycle reciprocating test was carried out on one specimen of reinforced concrete hollow frame and three specimens of reinforced concrete frame filled with hollow lattice wall panels.The lattice wall panel has an impact on the mechanical performance of the frame.Under the action of the earthquake,the lattice wall panel plays a certain role in protecting the reinforced concrete frame by bearing part of the shear force.（2）To explore the effect of hollow lattice wall panels on the bearing capacity,stiffness and displacement ductility of reinforced concrete frames.The results show that the lattice wall panel improves the bearing capacity and initial stiffness of the frame,and the stiffness effect of the lattice wall panel decreases rapidly during the loading process.The displacement ductility of the empty frame specimen is good,the lateral displacement of the structure is effectively reduced after the lattice wall panel is added,and the ductility of the specimen decreases with the increase of the panel thickness of the lattice wall panel.（3）The energy dissipation capacity of the fabricated hollow lattice wall panel frame structure is obviously better than that of the empty frame specimen;as the loading displacement increases,the equivalent viscous resistance coefficient of the empty frame specimen increases gradually,while the three filling The equivalent viscous damping coefficient of the wall frame specimen increases first and then decreases.（4）Using ABAQUS finite element calculation software to simulate the mechanical properties of the four reinforced concrete frames,the simulation results are basically consistent with the test results.（5）The parameters such as axial compression ratio,concrete strength grade,and tie steel bars are selected for parameter analysis.The research results show that as the axial compression ratio increases,the ductility of the specimen decreases,and the bearing capacity of the specimen does not change much;With the increase of concrete strength grade,the ultimate bearing capacity of the specimen increases gradually,and the concrete grade increases under the condition of low strength grade,and the bearing capacity increases significantly;When the diameter of the knotted steel bar is 10 mm,the bearing capacity of the specimen is improved most significantly.Figure [101] table [8] reference [69]...