Main Influence Factor Analysis On Seismic Performance And Parameter Optimization Design Of Steel Reinforced Concrete Member Compound Torsion

The Steel Reinforced Concrete(SRC) structure has been widely used in engineeringwith its own advantages. It combines the advantages of the steel structure and the RCstructure. The performance advantages of this two kinds of materia l, steel and concrete,have been fully realized. The seismic performance of the SRC structure subjected tocombined force is less researched at present. As the research object, the SRC memberssubjected to combined force is finite element simulated in ANSYS. The first step is tostudy the SRC columns subjected to pure torsion by using nonlinear finite elementanalysis in ANSYS. The rationality and accuracy of the model are verified bycontrasting analysis results and experimental results.The SRC columns and the RCcolumns are designed on this basis.The influence of main influence factors on theseismic performance is analyzed by simulating these specimens subjected to combinedtorsion which are tested under the low cyclic repeated loading. Optimization design ofparameters is conducted to improve the seismic behavior of the SRC members at last.The main research content of this paper includes:(1)By the nonlinear finite element analysis of the SRC columns subjected tomonotonous torque in finite element software ANSYS, the analysis results andexperimental results are contrasted. The goodness of fit between them is much higher.And the calculation results can reflect the mechanical property of the memberssubjected to torque more accurately. This shows that finite element model we created isreasonable and accurate. Then explain that the finite element software ANSYS cansimulate the torsional behavior of SRC members very well. And this lay the foundationfor studying the SRC members subjected to combined torsion.(2) By the finite element analysis of11SRC column members and1RC columnmember subjected to pressure, bending, shear and torsion which is under the low cyclicrepeated loading, the influence of torque, axial compression ratio, concrete strength,shear span ratio, steel size and the presence of payments on the seismic performancesuch as load-displacement hysteresis curves, skeleton curves, ductility energydissipation, stiffness degradation and ductility is analyzed.(3) As the objects, the energy dissipation capacity, stiffness degradation and ductilityare chosen to improve the optimal selection of design parameters. The seismicperformance of the SRC members is improved on this account. The basis and referenceof the optimal selection of the SRC members subjected to monotonous torque isprovided in the future.