Studies On Characteristics Of Bearing Capacity And Punching Shear Capacity And Shear-resistant Capacity Of The Independent Foundation Under Column On Rock Foundation

The foundation plays the role of transmitting the upper load to the foundation,thus it occupies an important part in the whole construction project.In the design,the foundation should be taken proper account of safety reliability and cost saving.The specification stipulates that the infrastructure design must meet the requirements of bearing capacity of foundation,bend-resistant bearing capacity,shear-resistant bearing capacity and punching shear capacity.The bearing capacity of the single foundation under column on rock foundation is high,and the rock under compression has little deformation.However,the foundation area is small and the height and width is relatively high and wide.And the basic punching shear capacity and bend-resistant bearing capacity of the rock foundation can meet the requirements.The calculation of shear-resistant bearing capacity determines the height of the foundation.The design method of the independent foundation under the column is mainly based on the theory of soil foundation,However,the calculation method for the shear resistance of the independent foundation under the column with high width and width is not explicitly explained in the current code.Therefore,the study of the mechanical properties of the independent foundation under the column of rock foundation is of great significance to reduce the project cost and shorten the construction period.On the basis of theoretical analysis,the paper that uses the finite element numerical simulation researches the mechanical properties of the single foundation under column.The main work is as follows:(1)ANSYS finite element method is used to simulate the mechanical properties of the independent foundation under column on rock foundation and analyze the influence of both on the pressure beneath foundation by changing the rock foundation' height and the bedrock'stiffness(2)The actual engineering case is used to analyze the defects of the foundation design method on the soil foundation adopted by the single foundation under column of on rock foundation.(3)By the theoretical analysis and finite element numerical analysis,and the relative literature's usage,the shear behavior of the independent foundation under the rock foundation column is discussed,which analyzes the failure mode,lists the relevant shear calculation formula and finally proposes a shear design method of the single foundation under column on rock foundation.Then the paper tries to improve the design theory of the single foundationunder the column and perform a practical engineering design calculation.