Study On Shear And Compressive Properties And Overall Structural System Of EVG-3D Plate

In recent ten years,under the great environment of actively promoting wall reform and building energy conservation in China,the rapid development of urbanization and the construction of new countryside have provided great driving force for the industrialization development of housing system.EVG-3D structural system originated from Austria can be directly spliced and combined as a load-bearing structure because of its unique 3D wallboard structure.It can not only meet the bearing requirements of low-rise residential buildings,but also greatly reduce the building energy consumption due to its good thermal insulation performance,which is perfectly compatible with the development trend of residential industrialization.EVG-3D slab structure system is a new type of building structure system.in this paper,ANSYS finite element software is used to simulate and analyze the mechanical properties of steel wire mesh cement sandwich panels.In order to better study the mechanical properties of EVG-3D plates,five sets of models are established in this paper to simulate and analyze the axial compression and shear bearing capacity of EVG-3D plates.The influences of concrete strength grade,concrete layer thickness,polystyrene core plate thickness,plate slenderness ratio and inclined inserted steel wire diameter on mechanical properties are systematically discussed.Simulation analysis shows that under compression,the increase of concrete strength grade and concrete layer thickness will greatly improve the bearing capacity and stiffness of 3D slab;EPS core board mainly plays the role of thermal insulation and composition in 3D board structure,and has little effect on the overall bearing capacity of the board;The greater the slenderness ratio of the plate,the smaller the stiffness and deformation,and the lower the stability and bearing capacity of the plate;Under the condition of shear resistance,the shear force of concrete surface on both sides is transmitted by oblique inserted steel wires.Increasing the diameter of oblique inserted steel wires can effectively improve its bearing capacity,increase its stiffness and reduce its deformation.Through the 1:2 overall structure model of three-story EVG-3D low-rise residential building,the stress simulation under unidirectional horizontal load is carried out,and the development law of cracking and deformation displacement of the structural plate is studied exploratively.The results of research and analysis show that EVG-3D plate integrates all kinds of materials into a whole by reasonably and accurately arranging steel wire mesh and oblique insertion wires,which effectively utilizes the tensile properties of steel wires and the compressive properties of concrete,and maximizes its performance advantages.Under the combined action of shear force and bending moment,the diagonal position of the door and window opening cracks first,and then the cracks continue to expand and become the weak part of the structure;The cracks generally develop and extend along the 45 angle direction.Therefore,in practical engineering application,it is necessary to take corresponding measures to reinforce the weak parts around the opening of the building structure.