Numerical Simulation Of Inter-story Collapse-prevention Mechanism Of Self-centering BRS Energy-dissipation Connection Between Innovative PEC Column And Steel Beam

The self-centering structure has many advantages than other structural style as follows: Firstly,the earthquake energy-dissipation capacity of structure is provided by energy dissipation(ED)device,which could improve the seismic performance of structure obviously.Secondly,the PT strands could reduce the potential for residual drift and alleviate structural damage process.Thirdly,the energy dissipation(ED)devices are always connected by bolts,which is easy to install and maintain.To investigate seismic mechanism of the inter-story sub-structure with self-centering BRS energy-dissipation connection in innovative PEC Column-Steel Beam composite frame,the test specimen of the inter-story substructure of PEC Column-Steel Beam composite frame was designed,which was based on the achievement of joint with selfcentering BRS energy-dissipation connection and the condition of laboratory.The test could not start on time becanse of objective reason.So,8 specimens which have several design parameters as lay-out of penetrating bolts,pretension force of posttensioning bars,length of the slotted holeswere,length of the BRS energy-dissipation connection and vertical force were designed to be numerically simulated under lateral cyclic reversed loading by using finite element software ABAQUS.Based on the data,the specimens’ seismic performances were studied,including the load-carrying capacity,self-centering functionality,energy-dissipation capacity,force-transferring mechanism of joint and residual deformation.The results indicated that the energy-dissipation developing process of the test specimen was postponed due to warping of T stud with bolted in one side;the larger of pretension force is,the better of self-centering function is;the length of the slotted holes had meaningful effects on the developing process of energy-dissipation capacity and selfcentering function;Broadening the BRS energy-dissipation connection could developing process of energy-dissipation capacity;vertical force has little influence on structures;the residual drift angle of all specimens were less than 0.005 rad when loading to inter-story drift 3.5%.