钢筋混凝土筒体结构的非线性地震反应分析方法研究-工程力学专业论文.docxVIP

AbstractBased Abstract Based on available dynamic finite element theories，considering the influence of geometrical and material nonlinearity,the spatial elastic-plastic time．history analysis methods of reinforced concrete tubing structures under major earthquake excitation ale studied combined with the actual seismic code Based on the Timoshenko beam theory，three dimension integration is receded to unidimensional imegration through the sectional analytic integration of beam．With the axial，shearing，bending and torsional deformation effects being included，the geometrical stiffness matrix is obtained．Then it’S practicability in the geometrical nonlinear analysis is conclued． Expanding the conception of the“storey model”，from which the beams and columns are discarded，with the floors being formed super—element(storey model)，a new type of spatial member-storey model with elastic and elastic—plastic division is raised based on the substructure technique．This new type of model Can reduce the degrees of freedom and the time of digital iteration obviously．So the engineering calculation On computer Can be controlled in available rlm time． According to a 29一storey(100．5m in height)reinforced concrete tube building，a spatial member-storey model is built up．The displacement，axial force，shear force and time—history cn／ve in displacement，velocity,acceleration is obtained by perform the seismic response analysis under major earthquake excitation using mode-superposition response spectrum method and elastic—plastic time—history analysis method．Some observation and discussion are given． When three kinds of strengthened storeys are set to concrete tubing structures，we get the seismic response and compare the results using above modal and method．The changing of internal force and the aseismatic performance are studied by comparing the three kinds of structures with different arrangement．Some studies are given to the design and construct measB．re ofthis kind ofstructures． The example sh