人工消能塑性铰构造低周往复试验研究

为提高装配式钢筋混凝土框架结构的抗震性能,针对震后梁、柱构件损伤严重等问题,提出了一种新型框架梁端构造——人工消能塑性铰,即在框架梁端通过预埋机械铰实现梁、柱构件铰接,同时安装附加钢板承载并耗能.设计制作了8组不同截面形式和构造的附加钢板试件,并对装有不同附加钢板的人工消能塑性铰构造进行低周往复荷载试验,研究该构造的破...

Experimental research on artificial dissipative plastic hinge construction under low-reversed loading

To enhance the seismic performance of precast-reinforced concrete frame structure, and aim at the severe damage of beam and column members after earthquake, an innovative construction at beam end called artificial dissipative plastic hinge (ADPH) is proposed. ADPHs are constructions that connect precast beam and column though an embedded mechanical hinge, and additional steel plates are installed to carry the load and dissipate energy. Eight groups of additional steel plate specimens with different sections and structures were designed and fabricated. The low-reversed loading tests are carried out on the artificial dissipative plastic hinge structures with different additional steel plates, the failure modes are analysed, and the seismic performance of ADPH are studied through the hysteresis curves, skeleton curves, equivalent viscous damping coefficient and ductility. The results show that the plastic damage will concentrate only on middle part of steel plates, and prove the effectiveness of energy dissipation by bending, ADPH construction possesses the features of damage-control and rapid-replacing, and the U-shape steel plates could enhance the capacity of buckling-delayed and energy-dissipating.