Study On Failure Mode And Bearing Capacity Of Single Column Footing In Rock

With the development of urbanization and the development of the western region in China, single-column footings(SCF) in rock foundation are increasing in many in mountain city constructions. At present,the accepted theory basis and calculation methods of SCF is mainly based on the soil foundation. Because of the rock foundation has the characteristics of high bearing capacity, high stiffness and small deformation, the foundation reaction and mechanic behavior of foundation on rock are different from that on soil foundation. There will be some obvious unreasonable if the SCF in rock foundation is designed by according to the specification. There will be some obvious unreasonable if the SCF in rock foundation is designed by according to the specification.By describe the phenomena and deal with the dates base on the field test, and integrate theory and numerical analysis methods, it further analyses the distribution curve of foundation reaction, distribution of steel bar stress,destroy model and bearing capacity of SCF in rock foundation. Main works are summarized as follows:â‘  Design and complete the field test of SCF in rock foundation, determination of foundation reaction, reinforcement stresses, bearing capacity of footing, and 0bserve failure mode of the footing.â‘¡ By using the finite element software ANSYS to simulate the SCF in rock foundation, obtain the foundation reaction force distribution, reinforcement stress and crack development.â‘¢ Based on the field test of the whole process of observation and analysis, and use of numerical simulation analysis, pointed out that the foundation is rake angle Failure mode, point out that the specification is not reasonable, provide a reference basis for such calculation.â‘£ Comparison of test results and results of theoretical calculation, analysis of the influence of various factors, and point the rock foundation under column independent foundation stress patterns for rectangular short beam shear model is more consistent with the actual situation of direct.