Research On Preparation And Performance Of Hollow Slab Model Of Solar Pavement Based On Light Guide Concrete

In order to explore the reasonable structure style of solar pavement,a kind of hollow slab structure of solar pavement based on light guide concrete was put forward in this thesis.Accordingly,the mechanical characteristics of the structure and the light path travels of the light guide were simulated and analyzed.The solid model was prepared,and its performances were tested.So the research is expected to provide a scientific and reasonable reference for the development of solar pavement.1)According to the functional requirements of traffic and power generation,a kind of slab structure of solar pavement based on light guide concrete was put forward.The structure consists of two parts of the protective layer of rectangle hollow slab with light guide concrete and the solar panels which place in a cavity of the hollow slab.Among them,the cavity of hollow slab is a hole room with parabolic vault,and the light guide is composed of the condenser lens(convex lens + prism)and the lightguide fiber,which can converge,guide and project the sunlight onto the solar panels in the hole room to achieve the function of power generation.2)The combination schemes of calculation parameters and value levels of the hollow slab structure of solar pavement were selected in accordance with the orthogonal experimental design method.The numerical simulations of the structural stress were analyzed with the three dimensional finite element method.The results show that the hole width has a significant effect on the maximum tensile stress,and the resilient modulus of foundation has a significant effect on the maximum vertical displacement.Through the single factor sensitivity analysis,the suitable slab sizes were determined.Among them,the slab plane size is 50cm×50cm,the thicknesses of the roof and the floor are 7cm and 5 cm respectively,and the hole height and the hole width are 5cm and 26cm respectively.3)The combination schemes of calculation parameters and value levels of the light path of light guide were selected in accordance with the single factor analysis method.The simulation analysis of light path of the light guide was accomplished through the ray tracing method.The results show that the radius of convex lens and lightguide fiber have significant influences on the effective transparent time length,and the radius of optical fiber has a significant influence on the total solar energy through the light guide.The suitable sizes of the light guide were determined by comparisons.Among them,the radius and the thickness of the convex lens are 10.5mm and 4.2mm respectively,the length of the prism is 31.1mm,and the radius of the lightguide fiber is 3.5mm.4)Through creating the solid model of hollow slab of solar pavement,the power generation efficiency,the physical and mechanical properties and the pavement performances of the slab model were tested.The results show that the volt-ampere characteristics of the solar pavement slab are similar to that of the general solar panel,and the maximum output power reaches 1.77W,which is 8%higher than that of the general solar panel.The maximum single-day generating volume is 0.41kW·h/m2,which reaches to 37.27%of the general solar panel.Meanwhile,the maximum vertical displacement of slab model is 8.55?m under the simulated standard axle load,and the smoothness and the skid resistance meet the requirements of the specifications.Therefore,the results show that the slab model of solar pavement can meet the requirements of traffic strength and funtion.In summary,the research in this thesis provides a theoretical and practical basis for the solar pavement structure based on light guide concrete,which can give a reasonable reference to the further researches.