Offshore platforms are main structure for marine petroleum and natural exploitation.During the service period

it’s not only subjected to dead load

but also subjected to wind load

wave impact

seismic load and other dynamic loads.These loads seriously threaten the safety and durability of platforms.Once the offshore platform damage occurs

it will cause huge casualties

economic losses and environmental pollutions.In this paper

ageneral FEM analysis program called ABAQUS is adopted to analyse the ability of platform to resist ice load and seismic load.Three kinds of structure types（support structure

braced structure

concrete-filled steel）have been proposed to discuss the energy dissipation by comparing the displacement and acceleration.The result shows that concrete-filled steel offshore platforms have good control and low cost and bracing platforms have the best damping effect in Tianjin ground motion.