THE SEISMIC PERFORMANCE OF PRECAST CONCRETE FRAME STRUCTURES WITH DRY-CONNECTED ROTATIONAL FRICTION BEAM-COLUMN JOINTS

Proposes a dry-connected rotational friction dissipative precast concrete beam-column joint (rotational friction dissipative joint, RFDJ). The joint is featured by the easy-to-adjust stiffness, yield moment, desirable deformation and energy-dissipation capacities. To validate the applicability of RFDJs for precast concrete frame structures, a novel precast concrete frame structure (NPCF) which contains RFDJs and grouted sleeve column base joints is selected as the research object. Based on two conventional reinforced concrete frames (RCFs) with different numbers of stories, the total slip moment ratio (ρ) and slip moment (M_s) distribution pattern are considered to generate 120 NPCF study cases. Based on these, nonlinear time-history analysis is conducted. The analysis results indicate that the RFDJ is applicable for precast concrete frame structures to make the structural performance equal to or better than that of RCFs. The ρ and M_s distribution pattern are two critical design parameters which determine the seismic performance of the NPCF. The structural response decreases with the increase of ρ, and the M_s distribution pattern has a significant influence on the seismic response control mechanism of the structure. The uniform cumulative distribution pattern could most effectively control the inter-story drift ratio with the lowest value of ρ, which is beneficial to the detailing and construction of RFDJs. The research provides a useful reference for related studies on the development and design of precast concrete frame structures with dry-connected beam-column joints.