EXPERIMENTAL STUDY ON SEISMIC PERFORMANCE OF REPLACEABLE BEAM-COLUMN CONNECTOR WITH SINGLE-SIDED ANGLE STEEL

The replaceable beam-column connector with unilateral angle steel means that a steel connector is arranged at the beam-column connection, a piece of friction energy dissipation brass is arranged on the web of the connector, and the flange is connected by a replaceable angle steel on one side, and prestressed steel strands are stretched inside the connector and the steel beam. Based on quasi-static test of two specimens without replaceable angle steel, one specimen with two sides angle steels, and five specimens with one side replaceable angle steel, the re-centering capability and seismic behaviours were analyzed such as failure form, bearing capacity, energy consumption capacity, and stiffness degradation. The study results indicated that: setting angle steel has greatly improved the seismic performance of the specimens, the seismic performance between the connector with single or double side angle steels was not obvious, and setting single-sided angle steel has the advantage of avoiding affecting the layout and construction of the floor slab on the beam. The seismic performance of increasing flange thickness was limited, but setting angle steel with thin flange connector can achieve the same effect, which is more economical. The beam-column connector with single-sided angle steel can easily replace the damaged angle steel after earthquake to restore the aseismic performance, and the replacement of thicker angle steel can achieve the surpassing of aseismic performance. The mechanism of "self-centering under moderate earthquake and replaceable with strong earthquake" can be realized well by rational design specimen, which can provide a good reference for aseismic design.