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为避免钢结构露出型柱脚在地震中发生破坏,研究一种新的减震装置。该装置通过楔块滑动、弹簧变形和螺杆的塑性伸长来控制柱脚位移,同时消耗地震能量,达到消能减震的效果。采用方形空心钢管柱,分别对普通螺栓柱脚和带减震装置的柱脚进行低周往复加载试验,研究其恢复力特性。试验表明:普通螺栓连接的柱脚呈滑移型滞回特征;由于弹簧恢复和楔块切入,新型柱脚连接每次加载卸载均以原点为始终,呈无滑移型滞回特征。根据试验结果,得到了带楔块装置钢柱脚的无滑移型恢复力模型。研究结果表明,无滑移型减震连接的钢柱脚具有良好的抗震性能且简单易用。
In order to avoid the steel structure exposed column foot in the earthquake damage occurred, the study of a new damping device. The device controls the displacement of the column foot through the wedge sliding, the spring deformation and the plastic elongation of the screw rod, and consumes the earthquake energy at the same time to achieve the effect of energy dissipation and shock absorption. A square hollow steel tubular column was used to conduct low-cycle reciprocating loading tests on common studs and columns with shock absorbers, respectively. The experimental results show that the studs with normal bolted connections are in a sliding hysteresis. Due to the spring recovery and the wedges, the new type of column-leg connections are characterized by no slipping hysteresis every time they are loaded and unloaded. According to the test results, the model of non-slip restoring force of steel column with wedge device was obtained. The results show that the non-slip type shock-absorbing steel column foot has good seismic performance and is easy to use.