The Finite Element Analysis Of Core Steel Reinforced Concrete Columns

With the development of modern architecture, building heights, span increasing,traditional reinforced concrete structure has been limited. The core steel reinforced concrete(CSRC) column can effectively inhibit the development of shear cracks,improve the stability of the concrete column axial load carrying capacity of the larger plastic deformation, thereby preventing structure under seismic action suddenly collapsed, as the current engineering structure in the form of more attention.Although the performance it can better play between the steel and concrete column CSRC this structure, but its structure as a main component, the force complex,influenced by many factors. When the use of the seismic performance factors affect test the analytical column costly large, the article uses finite element numerical simulation method CSRC column seismic performance analysis.On the basis of existing research results on the use of finite element analysis software ANSYS established eight stirrup having different volumes, steel of steel ratio, stirrup spacing, the core steel reinforced concrete columns model of axial compression ratio, the seismic performance analyse. Based on the experiment of load model-displacement curve, hysteresis curve, skeleton curve, energy performance indicators, such as seismic analysis and the results showed that:(1) Through the establishment of CSRC column with solid elements finite element model, its monotonic loading under pushover analysis, the resulting force-displacement curve than the actual test, you can better simulate the CSRC column deformation under monotonic loads and the forces.(2) From the pushover analysis results can be seen in eight models, steel of steel ratio for CSRC column carrying capacity greater impact, while the volume ratio of stirrups, stirrup spacing affect the seismic performance of the specimen is less than steel of steel ratio.(3) For repeated loading 8 Lag model back under analysis, its hysteresis loop are the deformation increases plump, an appropriate increase in steel of steel ratio and axial compression ratio can effectively improve the seismic member performance.(4) For all models, within a certain range, the higher the axial compression ratio,the poorer the performance of its energy consumption, volume stirrup ratio of energy dissipation and spacing of stirrups column CSRC little effect.Thus, within a certain range, with the volume stirrup ratio, increase the steel of steel ratio, stirrup spacing and reduce the axial compression ratio can effectively improve the CSRC columns seismic performance.