Shaking Table Tests of the Influence of Site Soil Properties on Isolation Structure of Nuclear Island
In order to study the influence of soil-structure dynamic interaction of different foundation soils on the dynamic response of base isolation system,three kinds of foundation soils with different hardness were equipped to carry out shaking table tests of dynamic interaction between soil-pile-nuclear island system and soil-pile-isolation bearing-nuclear island system.The pile-soil interaction between different sites,the dynamic response characteristics of the super-structure,the distribution of internal force of the pile,the law of deformation and the failure of the pile were analyzed.The results show that the change of foundation soil hardness has obvious influence on the pile-soil interaction of isolation system.With the increase of pile-soil stiffness ratio,the isolation efficiency of base isolation bearing decreases gradually,and the phenomenon of soil-structure separation is more obvious.For the isolated structure,after the isolated bearing is added to the site soil with different hardness,the bending peak value of the pile increases along the pile height with the increase of the soil stiffness.When the isolation bearing is used in the nuclear power engineering,the corresponding reinforcement measures should be taken to ensure its safety by considering the change of the stress distribution of the pile foundation in different soil foundation.
base isolationshaking table testsoil-pile interactionpile foundationnumerical simulation
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维普
