Experimental And Theoretical Research On Prestressed Steel Reinforced Concrete Column With Eccentric Tension Load

With the rapid development of Chinese economy,the prestressed reinforced concrete composite structure is widely used in high-rise building,super-high-rise structure,large span and conversion trusses with high bearing capacity,high rigidity and good ductility nowadays.It has the advantages of both the steel reinforced concrete composite structure and the prestressed concrete structure,which not only can play the excellent tensile performance of the post-tensioned prestressing tendons,but also has the characteristics of improving the ductility of the steel structure.Which greatly improves the structural disaster prevention and conform to the national green and sustainable development strategy.However,there are few studies on the tensile properties of prestressed steel composite structures at home and abroad,even there is no relevant specification,which makes this structure applied to the lack of technical support.Therefore,the study of prestressed steel composite structure Under the force is essential.In this paper,at first our research group solve the problem of how to carry out the eccentric tensile test by the tension and compression system,which system combine with 500 T presses in the structure hall.Secondly,considering different parameters of tension control stress,eccentric distance,ratio of longitudinal and ratio of steel on static load test of 13 prestressed reinforced concrete composite structure and 2reinforced concrete composite.Through phenomenological observation,test data and the force balance of the components,put forward the calculation formula of ultimate bearing capacity,lateral bending deformation,and the calculation formula of crack width calculation formula.The results are in good agreement with the experimental results.Finally,the finite element simulation of the bending performance of prestressed steel reinforced concrete columns was carried out by software ABAQUS based on the experiment.The simulation results were similar to the experimental results,which provided a reasonable reference for future similar projects.