STUDY ON NONLINEAR VIBRATION CHARACTERISTICS OF REINFORCED CONCRETE SPHERICAL SHELLS WITH FIXED LOAD : Numerical analysis method considering the combined nonlinearity and fundamental response characteristics

In this paper, earthquake response analysis technique considering geometric nonlinearity and material nonlinearity is presented for the purpose of making to be the aid of the evaluation of earthquake resistance by numerical analysis for RC shells. Next, the results of trying nonlinear seismic response analysis by the proposed technique are shown for the purpose of the evaluation of earthquake resistance of the spherical shells for roofs of the various underground container structures. The fundamental analysis on nonlinear vibration property of the RC spherical shell is tried, and the results of trying the evaluation of damage levels and collapse levels by numerical analysis in the time history are shown.