Formation and Migration Mechanism of Plastic Zone in Steel Casing Composite Piles Under Impact
In order to explore the formation and migration mechanism of plastic zone in steel casing composite pile under impact,based on a numerical model of steel casing composite pile ship impact verified by pendulum impact test,the differences and similarities in the generation and development of plastic zone between steel casing composite piles(SCC piles)and ordinary reinforced concrete piles(RC piles)were compared,as well as the formation and distribution of plastic zone in foundation piles at different steel casing scales,an in-depth analysis was conducted on the generation and evolu-tion of the plastic zone of the steel casing composite pile under impact load,and the influence of the length to diameter ratio and thickness to diameter ratio of the steel casing on the plastic zone of the foundation pile was explored.Research has shown that the steel casing shortens the development time of the plastic zone of the foundation pile under impact,making the plastic zone of different pile posi-tion in the same pile foundation tend to be consistent,and increasing the range of the foundation pile participating in the stress;The increase in soil penetration depth and the decrease in thickness of the steel casing both lead to the transfer of the plastic zone of the foundation pile to the steel casing wrap-ping section.Steel casings with smaller thickness are prone to local buckling under impact loads,leading to the formation of plastic zone when the foundation pile is far away from the impact side.
bridge foundation pilesteel casingimpact loaddynamic responseplastic zone
万方数据
维普
