Design Method And Seismic Performance Research On SRC Shear Walls With Replaceable Toe Dampers

Shear wall is a key member of high-rise buildings.In the seismic district,The foot concrete at the bottom sides of shear wall will be severely damaged under the seismic action,and repairing work is difficult to achieve after earthquake.So the idea that the replaceable damper stalled on the easily damaged position such as the bottom toe of shear wall.Seismic performance of shear wall could be quickly recoveried by replacing the replaceable member after earthquare.Therefore,a new type steel reinforced concrete shear wall with replaceable toe dampers is proposed in this thesisThe shear wall is made up by main wall and replaceable toe dampers,The main wall is the original wall which is excavated some space at the both toes of wall,The replaceable toe members are construted by two U-shaped slab connected in parallel,The energy dissipating spring is installed between the two U-shaped slab.A new structure is put forword by connecting the main wall and replaceable toe damper reasonably.The size of excavated space is determined,and than the design theory and method of the replaceable steel reinforced concrete shear wall are proposed by analyzing the plastic concentration position of ordinary steel reinforced concrete shear wall.The design and calculation of replaceable toe dampers are proprosed from the idea of seismic energy dissipation and damage control.And a computational example is done to test the design methods,the new formulas of shearing and flexural capacity are also suggested for steel reinforced concrete shear wall with replaceable membersAccording to the practical engineering,three energy dissipation damper of U-shaper with low yield point steel are designed,and ordinary steel reinforced concrete shear wall and four SRC shear walls with replaceable toe dapmers are put forwad,The production method of testing specimen and the experimental research of both testing scheme and loading process are put forword.How to test the seismic ability of SRC shear walls with replaceable toe dampers are suggested.The three energy dissipation steel dampers of U-shaped with low yield point and five shear wall are simulated by ABAQUS finite element software.The failure mode,strength,deformation and energy dissipation on seismic performance are analyzed by changing the different geometric parameters of U-shaped low yield point steel dampers energy dissipation and different confrigurable features of five shear walls.The relation conclusions can provide a meaningful references for the design and engineering applications of SRC shear wall replaceable foot parts in the future.