新型装配式金属消能减震复合墙板抗震性能试验研究

Experimental study on the seismic performance of a new type assembled metal energy dissipation composite wallboard

为了研究新型预制装配式金属消能减震复合墙板的抗震性能,分别对新型预制装配式复合墙板以及传统夹心墙板进行了低周反复加载试验,对比研究了试件的破坏模式、滞回耗能性能、承载力与刚度、位移延性等变化。研究表明:新型预制金属消能减震复合墙板滞回曲线呈现"平行四边形",相对于传统复合墙板较为饱满,具有良好的抗震性能;相比于传统夹心复合墙板主要在墙板中部出现X形剪切裂缝,新型预制装配式金属消能复合墙板裂缝主要在墙板角部出现,具有良好的整体性能;新型预制装配式金属消能减震复合墙板具有较小的侧向刚度、较好的位移延性,能够降低围护墙板附加刚度约束效应;新型预制装配式金属消能减震墙板能够达到"小震下处于弹性,大震下屈服耗能"抗震设计目标。

In order to study the seismic performance of a new type prefabricated metal energy dissipation composite wallboard,low cyclic loading experiments were carried out on the new type composite wallboard and the traditional sandwich wallboard respectively.The failure mode,hysteretic energy dissipation,bearing capacity,stiffness and displacement ductility of specimens were compared.The results show that the hysteretic curve of the new type prefabricated metal performance damping composite wallboard presents a configuration of“parallelogram”,which is more full than that of traditional composite wall panels and has good seismic performance.Compared with the traditional sandwich composite wallboard,where X-shaped shear cracks appear mainly in the middle of the wallboard,the cracks of the new wallboard mainly appear at its corners,showing good overall performance.The new wallboard has smaller lateral stiffness and better displacement ductility,which can reduce the constraint effect of the additional stiffness of the clothing wallboard.The new prefabricated metal performance damping composite wallboard can achieve the seismic design goal of“elastic under small earthquake and yielding energy under large earthquake”.