Analysis On Flexural Behavior And Seismic Behavior Of Non-holomorphic Circular Pile

The flexural behavior and shear behavior of prestressed concrete pipe pile arepoor in practical engineering experience. The number of stories of the civilarchitecture using prestressed concrete pipe pile can not exceed18, which is regulatedin Technical code for prestressed concrete pipe pile, which greatly limits theapplication of prestressed concrete pipe pile in practical engineering. In order toobtain enough seismic performance, it is necessary to improve the prestressedconcrete pipe pile. This is very important to generalizing precast pile and ensuring thesafety of the engineering.A new kind of pile (non-holomorphic circular pile）is designed, according tonational building standard design atlas: prestressed concrete pipe pile (10SG409).Characteristics of soft clay and seismic fortification intensity of Tianjin are consideredin the designing process of this new pile. The non-holomorphic circular pile is aspecial-shaped pile, in which the pretensioning method is used. The vertical bearingcapacity of non-holomorphic circular pile is high,and The non-holomorphic circularpile can meet the requirements of some region on the property of pile foundation.Based on finite element method, finite element models of non-holomorphic circularpile are set up with ABAQUS to study the flexural behavior and Seismic Behavior ofnon holomorphic circular in this paper. Finite element models of cylindrical pile areset up to study the difference between non-holomorphic circular pile and cylindricalpile.The main conclusions of this paper are as follows: The ultimate bearingcapacities of non-holomorphic circular pile and cylindrical pile have little difference.The displacement ductility ratio of non-holomorphic circular pile lies between3.38and3.64, indicating that the non-holomorphic circular pile has better ductility. Thehysteretic curves of non-holomorphic circular pile and cylindrical pile are plump,which shows better energy dissipation capacity. The non-holomorphic circular pileand cylindrical pile can get the maximum ultimate bearing capacities and the mostplump hysteretic curves, when the axial compression ratio of specimen is0.29.