Numerical Analysis of Structural Parameters of BFRPC Capping Beam Formwork Shell
In order to explore the feasibility of the formwork shell structure of basalt fiber reinforced reactive powder concrete(BFRPC)capping beam,the finite element model was established by Abaqus software.The effects of the thickness of the formwork shell,the longitudinal reinforcement ratio and the U-shaped stirrup reinforcement ratio on the mechanical characteristics of the post-cast concrete stage of the formwork shell were analyzed.The results show that:1)In the post-pouring concrete stage,the maximum principal stress of the 20 cm thick BFRPC formwork shell under the ultimate state of bearing capacity and the maximum displacement under the normal use limit state meet the requirements of the specification,which proves the feasibility of the construction method of the semi-prefabricated bent cap;2)Under the premise of other conditions unchanged,the thickness of the formwork shell has the greatest influence on the stress of the structure in the construction stage,and the longitudinal reinforcement ratio and the U-shaped stirrup spacing have little influence on it;3)According to the curve of stress and displacement with the change of structural parameters,the reasonable interval of each parameter is inferred,which provides the basis for practical engineering application.
capping beam formwork shellBFRPCAbaquspost-pouring concrete stagenumerical analysis of parameters
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