| As a new type of structure, steel reinforced concrete plays an important means ofmodular construction, which must be solved in the design and application of theCAP1400. Because of the lack of specialized technology to steel reinforced concretestructure in nuclear power engineering specifications, regulatory agencies in manycountries raises doubts about the design of steel reinforced concrete structure in thenuclear power engineering. In this dissertation, it is mainly focus on the research steelreinforced concrete structure on shield building. Through experiment research,numerical simulation and theoretical analysis, the paper research that the steelreinforced concrete structure of nuclear power engineering under different loadcharacteristics, seismic response regularity and a seismic performance characteristics,and gives some available for practical engineering application results of the study. Theresearch provide the reference and technical support for the design of nuclear powerengineering and the Seismic design codes for the steel reinforced concrete structure ofnuclear power engineering.The main works of this dissertation are summarized asfollows:(1) Axial compressive loading tests of4steel reinforced concrete composite wallapplied nuclear power engineering have been carried out, and the main test parametersare the different thickness ratio on test specimen. It analyze the key factors whichcontrol bucking of steel plate, and research on the rules of bucking of steel plate. Also itanalyzed the destruction mechanism of artifacts, load-displacement curve, steel plateload-buckling curve. The research shows that Buckling of steel plate is of little influenceon the overall stiffness of the specimens, the stud can effectively guarantee the steelplate and concrete work together; As thickness ratio small, specimen ultimate bearingcapacity become increase and buckling strain of steel plate become larger. On the basisof experimental analysis, the experience formula of initial stiffness and ultimate bearingcapacity are given, the theoretical formula of the elastic buckling strain is derived forsteel plate.（2） Low frequency cyclic pseudo static tests of3steel reinforced concretecomposite wall applied nuclear power engineering have been carried out. The influencerule on Seismic performance of composite wall by thickness ratio and the combinationof different shear connectors was investigated，Analysis of the composite wall stiffnessdegradation, ductility, hysteresis property, energy dissipation capacity and failure mode(3) By using the finite element software ABAQUS to establish the4vertical plateaxial compression concrete test specimens and3cyclic pseudo static test of steel plateconcrete finite element analysis model. The model considered the effects of materialnonlinearity, geometric nonlinearity and contact nonlinearity. Using solid element tosimulate the shear connector, the test force, the deformation, buckling, the ultimatebearing capacity and failure form of numerical simulation, and the results of the stress mechanism are given in the last test(4) Using the finite element software ABAQUS on the vertical axis pressed steelplate concrete test of key design parameters in sensitivity analysis. Choosing theselected concrete strength, wall plate, steel strength and steel content from the thicknessratio as parameters, and the ultimate load carrying capacity and load displacementcurves for sensitivity analysis. Analysis results show that: the influence of concretestrength than the steel strength and influence the amount of steel to bigger; the changeof concrete strength, when compare to the change of strength of steel plate and steelvolume, effect the load-displacement curve of the composite structure is more complex.From the test piece thickness on the smaller of the load displacement curve, the bearingcapacity is almost no change, but the great influence on the plate buckling.(5) Using the finite element software ABAQUS is used to model nuclear structure,analysis of the structure dynamic characteristics. Based on design response spectrum, anartificial seismic wave is synthesized as an input of the time history analysis. Verify theseismic safety of nuclear island structure design that when the design direction of threecase vibration are0.3g, Through adjusting the peak acceleration of seismic wave asinput, get on the structural seismic response under different peak acceleration, and theforce mechanism of steel and concrete in steel concrete composite structure are given.Calculation shows that: junction shield building and auxiliary building was easy toproduce stress concentration, and steel plate mainly in the yield stress, and yield stressdoes not extend to the middle parts of the steel plate. In the connection with concretefoundation in third principal compressive stress, and the concrete emerge first crushedphenomenon. In the whole analysis process, steel and concrete are separate phenomena.The floor response spectrum of nuclear island structure are key points, calculationshows that: when the input ground motion is from0.3g to1.2g, the floor responsespectrum shape changed obviously, cycle peak acceleration corresponding variable,shows that the stiffness of the structure changed obviously, the corresponding node peakacceleration is correspondingly larger than floor response spectrum. Floor responsespectrum corresponding to the period of more than0.6s, with the increase of inputground motion, response spectrum corresponding acceleration uniform increase, and thecorresponding segment of the response spectrum shows translation effect. |
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