Analysis Of Factors Affecting The Bearing Capacity Of Modular Trestle Lightweight Floorboard

There are many forms of coal trestle,and modular steel trestle is one of the new structural forms,which adopts modular assembly construction.Aiming at the problems of the self-heavy weight and large steel consumption of the modular steel trestle floor in the past,the Hebei Engineering University research team proposed a new type of trestle floor structure—lightweight concrete slab.This paper takes this new type of base plate as the research object,researches its static characteristics,designs the test scheme and organizes its implementation,and analyzes the obtained test data.Then based on the finite element theory,use ABAQUS software to analyze it accordingly,and compare the simulation results with the experimental results.The two agree well,which verifies that the finite element simulation analysis is correct.Finally,according to the relevant specifications and theoretical requirements,the corresponding factors of the static characteristics of the floor are researched,and the influence of the three factors of the foam concrete weight,the thickness of the light floor and the distance between the C-shaped steel on the bearing capacity of the floor is further analyzed.The research results show that the spacing of C-shaped steel has the greatest influence on the bearing capacity of the soleplate.The smaller the distance between the profile steels,the higher the bearing capacity of the floor;the larger the bulk weight of the foam concrete,the higher the bearing capacity of the floor,but the foam concrete's bulk effect has little effect on the bearing capacity of the floor.The thicker the plate,the greater the rigidity of the bottom plate.At a distance of 500 mm,the thickness of the plate has little effect on improving the bearing capacity of the bottom plate.However,when the profile is at a distance of 600 mm,the thickness of the plate is increased and the bearing capacity of the bottom plate is significantly enhanced.The research conclusions in this paper can provide basis for the design and selection of the lightweight floor of modular steel trestle bridges to meet the needs of engineering practice.