Bridge pier with seismic performance gradient

摘要

Problem to be solved: to provide a pier column having a seismic performance gradient and its construction method.The bridge column column having the seismic performance gradient includes a concrete bridge pier, a reinforcement 1 disposed in a bridge leg column, and a gradient reinforcing member 2 arranged in a stepwise manner.The gradient reinforcement is a fiber or shape memory alloy.The cross section of the gradient reinforcements varies continuously or stepwise to form a seismic performance gradient within the pier column.During construction, determining the magnitude and the way of implementation of the bridge pier column's performance gradient in accordance with the seismic stress state of the piers column, the other cross section of the performance gradient zone does not exceed its critical curvature before the top section of the bridge pier's performance gradient zone reaches the critical curvature.In addition, it is possible to realize that the performance gradient zone of the bridge pier is simultaneously reached in the plastic state under the action of the earthquake, and the plastic deformation zone of the pier column becomes large, and the deformation performance and the energy consumption capacity are drastically improved, and the resistance peak acceleration can be drastically increased.Diagram