Study On Seismic Performance Of RC Frame-assembly HPFRCC Energy Dissipation Wall Structure

Reinforced concrete(RC)frame structures are prone to weak layer failure under earthquake action,and the damage mechanism is difficult to control.In order to improve and enhance the seismic performance of RC frame structure,energy dissipation devices are added between the frame columns to reduce the damage and improve the seismic performance of RC frame structure.In this paper,high performance fiber reinforced cement based composite material(HPFRCC)is prefabricated into energy dissipation wall and assembled into RC frame structure to form a new seismic structure system of RC frame-prefabricated HPFRCC energy dissipation wall.In this paper,the seismic performance,influencing factors and energy dissipation distribution of RC frame-assembled HPFRCC energy dissipation wall structure system are studied by using dynamic time-history analysis with ABAQUS finite element software.The research results are as follows:(1)Compared with model RC,the model RC-FRCW equipped with HPFRCC dissipated wall changes the yield mechanism of beam end and column end of the original frame structure,and its plastic hinges are reduced and controlled in the first and second floors.Compared with model RC,the maximum vertex displacement Angle of model RC-FRCW is reduced by 24%-39%,and the maximum vertex displacement Angle of the structure is controlled to a certain extent.(2)The HPFRCC energy dissipation wall at the bottom reduces the maximum displacement Angle of the original frame structure by 17%-23%.The HPFRCC energy dissipation wall on the bottom and second floor can reduce the maximum displacement Angle of the original frame structure by 46%-55%,and the maximum story drift by 34%-46%.Under the seismic action of 0.2g peak acceleration,the model RC is close to the third performance level,while the average value of the maximum interlayer displacement Angle of the model RC-FRCW equipped with HPFRCC energy dissipation wall is less than the limit value of the interlayer lateral displacement Angle of the secondary energy level,reaching the secondary energy level.(3)The assembly of HPFRCC energy dissipation wall reduces the energy consumption of the original frame structure beam by 55%-60%,and the energy consumption of the frame column by 72%-74%;the assembly of energy dissipation walls on the ground floor and the second floor reduces the energy consumption of the original frame structure beam by 65%-74%,and the energy consumption of the frame column by 82-85%.