EXPERIMENTAL AND NUMERICAL STUDY ON HIGH STRENGTH STEEL ENDPLATE CONNECTIONS IN FIRE

摘要

In this paper, a perspective of combining high strength steel endplate with mild steel beam and column in endplate connections is proposed and investigated.Firstly, tests on high strength steel endplate connections were conducted attire temperature 550°C and at ambient temperature as reference.The moment-rotation characteristic, rotation capacity and failure mode of high strength steel endplate connections in fire and at ambient temperature were obtained through tests and compared with those of mild steel endplate connections.Further, the provisions of Eurocode 3 were validated with test results.Moreover, the numerical study was carried out via ABAQUS and verified against the experimental results.It is found that a thinner high strength steel endplate can enhance the connection 's rotation capacity both at ambient temperature and in fire (which guarantees the safety of an entire structure), and simultaneously achieve almost the same moment resistance with a mild steel endplate connection.