| Glass fiber reinforced plastic(GFRP)is widely used in various engineering industries due to its advantages of light weight,high strength and corrosion resistance.GFRP hollow slab has many advantages,such as light weight,high strength,corrosion resistance,simple preparation,convenient transportation and good environmental protection.It has been used in bridge engineering,but its application in the field of construction engineering is lack of necessary research.In this paper,GFRP hollow slab is applied to roof slab,and the component size of hollow slab is determined by optimization design.The static performance of GFRP hollow slab is studied by experiment,numerical simulation and theoretical derivation.This paper mainly studies from the following four aspects:1.Optimization design of GFRP hollow slab.First of all,the section forms of various GFRP hollow slab in the literature are summarized,and three section forms are selected.The design scheme is compared and selected based on various factors,and the GFRP hollow slab with rectangular section form composed of upper and lower panel and square tube is selected.Then,the sensitivity analysis is carried out with each dimension of GFRP hollow slab section as the design variable,and the design space of each variable is selected.Finally,taking the maximum deformation as the constraint condition and the mass as the objective function.Finally,the parameters of GFRP hollow slab are determined.2.Experimental study on GFRP hollow slab.Firstly,the basic component performance is calculated by theory and compared with the material laboratory test results;secondly,the static performance of GFRP hollow slab under load is studied by experiment.The results show that the maximum deflection is 11.5mm when the load is 2kN/m~2,which meets the requirements of the code(1/200 of the span)15mm,and has certain safety and stability.3.Finite element analysis of GFRP hollow slab.First of all,SolidWorks is used for modeling,ANSYS is used for static performance finite element analysis,and its stress,strain and deformation properties are studied;then,based on the static performance analysis,the influence of temperature change on the performance of GFRP hollow slab is analyzed.4.Research on the design method of GFRP hollow lab.Based on the experimental research and finite element analysis,the bending performance of GFRP hollow slab is analyzed theoretically,and the performances of deflection,normal stress and shear stress are studied,which can provide some basis for engineering design. |
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