Study Of A New Design Method Of Replaceable Energy-dissipation Coupling Beams

In this paper, the concept of earthquake-resilient structure is introduced, the impendency and significance of improving energy dissipation and recoverability of coupling beams are illustrated. Based on the summary of the energy-dissipation coupling beam and replaceable energy-dissipation coupling beam, design method of a new replaceable coupling beams was presented. In order to deeply understand the characteristic of replaceable energy-dissipation coupling beam construction and evaluate the feasibility of the designed method, author performed related research, the primary coverage as follows:1) Based on the summary of these methods, author presented the design method of a new replaceable coupling beams. It’s based on stiffness equivalent by steel plates and damper.The new method is simple and practical, which made good capacity of dissipating energy for replaceable energy-dissipation coupling beam.2) Author presented the structural type of the new replaceable coupling beams, which made steel plate smoothly through the stirrups and verified the feasibility of the structural type.3) Based on the new method, author designed a coupled shear wall with replaceable energy-dissipation coupling beam, structure models are built based on ABAQUS nonlinear finite element software. Author analyzed the performance characteristics of coupled shearwall structure with replaceable coupling beams and evaluated the feasibility of the designed method. The results show that replaceable coupling beams didn’t yield, the damper yielded before the shear wall, the new method protected coupling beams and formed ideal failure mode. What’s more, the damper has high utilization.4) Based on an actual engineering of shear wall structure, The seismic performance of the building, which designed by the new method and the problem of original structure, was evaluated based on the static analysis under frequent earthquake, and the nonlinear time history analysis under rare earthquake was conducted. Comparing the differences of structural response, failure mode, structural member damage, energy dissipation mode between two buildings, author further evaluated the method. The results show that application of the new method had been implemented in actual engineering, the new replaceable coupling beams protected shear wall, improved the energy-dissipating capacity and seismic performance of structure.