Parametric Modeling Method In ABAQUS For Highrise RC Structure

With the rapid development of material constitutive theory and computer technology, elasto-plastic analysis has been adapted to perform structure's seismic properties frequently. The general finite element software ABAQUS has become one of the most effective tools to perform elasto-plastic analysis, for its abundant material and element library and high nonlinear problems solving ability. But it is very cumbersome and time-consuming to build ABAQUS models of complex structures. The application of ABAQUS to perform dynamic elasto-plastic analysis is restricted.Based on parametric finite element modeling, this paper develops a conversion program which can switch finite element model from MIDAS/GEN to ABAQUS. Thus the modeling in ABAQUS is omitted, and the efficiency of performing dynamic elasto-plastic analysis on complex high-rise structures is greatly improved. First, based on MIDAS mgt file and ABAQUS inp file, using python programming platform, develop the conversion program. The basic idea is extracting the model information from mgt, and getting analysis information from the user, then converting the information, at last, writing the information to inp file which can be submitted to ABAQUS solver directly.Convert five MIDAS models of different structural system to ABAQUS models via the conversion program and execute mode analysis as well as elastic time-history analysis in both softwares. The comparison of results proves that the conversions of nodes, elements, material, cross section and loading are complete and correct.Build a 12-story RC frame structure model in MIDAS, convert the model to ABAQUS elasto-plastic model and execute dynamic elasto-plastic analysis under earthquake. The comparison of elasto-plastic analysis results and shaking table test results prove that the conversion program is effective. Build elasto-plastic ABAQUS model of a hotel building manually, and then build another ABAQUS model via the conversion program automatically. Execute dynamic elasto-plastic analysis under severe earthquakes for both ABAQUS models. The comparison of results of the two models proves that the conversion program is effective and efficient.