SEISMIC PERFORMANCE STUDY OF PEC COLUMNS FABRICATED WITH THIN-WALLED BUILT-UP SECTION BY FULL SCALE

In order to study the hysteretic behavior of PEC columns fabricated with thin-walled built-up section in serviceability state, 3 specimens were derived by full-scale with various strength of concrete based on the research achievements in the field of PEC column, which represented the middle-storey column in the frame structure. Under lateral cyclic loading in column strong axis, the local buckling in flange of thin-walled built-up section and the crack developing and crushing of concrete were observed, the hysteretic curves were obtained. Based on the test results, the specimens’ responses were analyzed, including the load-carrying capacity and lateral-resistant stiffness, the failure mode, the ductility and energy-dissipation capacity. The conclusion showed that the specimens exhibited sound ductility and energy-dissipation capacity; the failure mode formed primary induced by crushing and spalling of concrete at the corner region of column with local buckling in flange of PEC columns fabricated with thin-walled built-up section and yielding of transverse links.