Finite Element Analysis of Hollow Composite Floor with Phosphogypsum Mold Shell
A new type of prestressed ribbed phosphogypsum hollow composite floor system is proposed to address the problem of formwork displacement,complex construction process,and unsuitability for prefabricated buildings in the construction of cast-in-place dense ribbed hollow composite floor and beamless floor.Using ABAQUS finite element software,27 new composite floor finite element models are established to study the effects of parameters such as cavity shell material,precast thickness of prestressed rib beams,truss height,and diameter of stressed steel bars on the bearing capacity of the new hollow composite floor.Theoretical analysis of cracking load and bearing capacity is also conducted.The results show that the yield load and maximum load of the new prestressed ribbed beam phosphogypsum cavity shell composite floor differ from those of the traditional concrete composite floor by 2.35%and 3.71%,respectively.The new floor can meet the requirements for normal use;by increasing the diameter of the lower chord steel bars,the ultimate bearing capacity of this new type of hollow composite floor can be improved;the thickness of prefabricated rib beams and the height of trusses can significantly improve the bearing capacity of the new floor system within a certain range.Continuing to increase the thickness of prefabricated rib beams and the height of trusses will significantly reduce the bearing capacity of the floor system.Based on the results of finite element analysis,the optimal parameter dimensions of the new composite floor under different span conditions are proposed,providing a theoretical reference for the practical application of the floor.
prestressed ribbed beamphosphogypsum mold shellsteel bar trusscomposite floor systemABAQUS
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