COMPARISONS OF 5 TYPES OF SOIL DYNAMIC NONLINEAR CONSTITUTIVE MODELS IN SEISMIC RESPONSE OF SITE

摘要

Firstly, research evolution, merits and disadvantages of soil nonlinear constitutive models are reviewed, and needs of nonlinear analysis methods in time domain are pointed out. Secondly, the whole equation and application key of 5 types models, which are Pyke method, damping degradation coefficient model,non-Masing rule model ONE and model TWO, implicit stress damping equivalent model, are presented.Thirdly, by detailed comparisons of nonlinear response of clay layer mantled base rock site and Taiwan Lotung DHB borehole array site, nonlinear performance, hysteretic energy, difference of dynamic response, calculating efficiency and application condition of each model are expounded. At last, discrepancy of synthetic ground motion of each model and record of strong motion observation are discussed, and the improvement problems,which need to be done in future, are suggested.