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To study and analyze the mechanical property of cast-in-situ concrete light pipe column wallboard, the small deflection theory of thin board was used, aiming to deduce the deflection and internal force expression of cast-in-situ concrete light pipe column wallboard under action of the triangular load and uniform load. The wallboard used the form of three simply supported and one fixed edges. Finally, a table of related coefficients of deflection and internal forces was formed. The ABAQUS finite element analysis software was used to analyze the influence of the factors such as volume hollow ratio, pipe length, load form, boundary condition, axial compression ratio and its action position on the bearing capacity of cast-in-situ concrete light pipe column wallboard. The calculation result showed that the loading capacity of PVC pipe with the length of 1500 mm was close to one with the length of 1000 mm. When the length of PVC pipe was between 1000 mm and 1500 mm, the bearing capacity of the wallboard was hardly affected by the length of the PVC pipe. It is concluded that the PVC pipe with a longer length can be selected to effectively reduce the influence of hydration heat of the concrete.

INTERNAL FORCES ANALYSIS OF CAST-IN-SITU CONCRETE HOLLOW FLOOR BASED ON FINITE ELEMENT ANALYSIS