Study On Mechanical Properties Of Foamed Concrete Steel Wire Frame Composite Wallboard

Nowadays,with the rapid development of housing industrialization,high turnover in the real estate industry has become the norm.The fabricated structure is widely used for its short construction period,simple field assembly,high installation accuracy and low labor cost.The foamed concrete steel wire frame composite wallboard is a new type of fabricated wallboard which is based on the traditional steel wire frame sandwich wallboard.Compared with the traditional steel wire frame sandwich wallboard,this wallboard mainly uses the foamed concrete,steel wire mesh and oblique steel reinforcement cage to force together to form an organic whole with multiple lines of defense,make full use of the foamed concrete light-weighted,highstrengthen,heat preservation,heat insulation,porous characteristics,give play to its energy absorption and shock absorption material characteristics,with steel wire mesh,steel reinforcement cage skeleton support capacity,optimize the overall performance of the wallboard.The traditional shear wall structure,the plane layout limitations,structure self-weight heavy,high cost,can not fully meet the requirements of economic applicability.But this wallboard has multiple lines of defense,all parts of the wallboard synergistic force,the overall performance is strong,can be applied to multi-storey,high-rise buildings,conform to the development trend of China’s future housing,it has a good application prospect.In this paper,after reading a large number of relevant references,combined with its own experimental characteristics,through the combination of experiment and finite element simulation,the mechanical properties of foamed concrete steel wire frame composite wallboard PMZTB-1 are investigated.Based on the experimental data and finite element software simulation results,this paper provides theoretical guidance for the practical application of this new type of composite wallboard in the future,the main contents of this paper are as follows:1.Apply the horizontal hydraulic servo actuator with reaction wall provided by the structure laboratory to conduct the pseudo-static test of low-cycle reciprocatingloading.Using displacement for loading,considering comprehensive factors such as test site,the proportion of the experimental model is 1:2,In the test,by recording and observing the changes of cracks in different stages,the development status of cracks,the changes of the displacement reading of the horizontal displacement meter and the failure characteristics of the final composite wallboard,etc.By comparing the failure mode of traditional foamed concrete composite wallboard PMFTB-1,the hysteretic loop curve,stiffness degradation and other structural performance indexes obtained by the two are compared to explore the mechanical properties advantages of foamed concrete steel wire frame composite wallboard.Through the comparative analysis of the test,under the condition of the same volume reinforcement ratio and component size,the bearing capacity,overall seismic performance,deformation resistance and energy dissipation effect of PMZTB-1wallboard(in the form of oblique steel wire mesh and oblique steel reinforcement cage)in each main stage are improved compared with PMFTB-1 wallboard(in the form of oblique steel reinforcement fabric mesh).2.Finite element simulation software ABAQUS is used to model and analyze PMZTB-1 and PMFTB-1 of the test wallboard.Simulation the vertical uniform load and horizontal displacement,the simulated cloud charts are compared with the experimental phenomena and data,the results are in good agreement.It can be seen that the combined wallboard with oblique steel reinforcement cage and spatial steel wire mesh can form multiple lines of defense,and the combined wallboard has better ductility and seismic energy dissipation effect,with good work performance.3.This paper makes a preliminary exploration on the skeleton curve restoring force model of PMZTB-1 wallboard.To explore the dynamic characteristics of composite wallboard in seismic response,and the relevant test data are analyzed.