Analysis on seismic performance of precast segmental pier with multi-stage energy dissipation post tensioned tendons
To improve the seismic performance of segmental piers,multi-stage energy consumption was pro-posed to achieve multi-segment participation in energy consumption.Energy-consuming reinforcement was adopted to pass through several joints from the bottom upwards to realize multi-stage energy consumption.Through numerical simulation,the energy dissipation capacity of a multi-stage energy-consuming segmental pier system was studied.For the three-stage energy-consuming segmental pier system,the axial compression ratio and the reinforcement ratio of energy-consuming steel bars were analyzed.The results show that the multi-stage energy dissipation segmental pier system can improve the energy dissipation capacity of the seg-mental pier.There is an upper limit of energy dissipation in each level of the energy dissipation system,and the upper limit increases with the level promotion of the multi-stage energy-consuming system.In different systems,the upper limits of the reinforcement ratio of energy-consuming steel bars are different.Those of the one-stage and two-stage systems are 0.23％and 1.31％,respectively.To obtain higher energy consumption capacity,the rational reinforcement ratio and the rational ratio of axial compression stress to strength are rec-ommended as to be 1.31％and 0.1,respectively.
energy-consuming steel barsmulti-stage energy consumptionhysteresis curveenergy dissipa-tion capacityresidual displacement
万方数据
维普
