密肋复合墙结构体系抗震性能的试验研究

密肋复合墙结构独特的构造使结构在地震作用下表现出填块→框格→外框的破坏模式，实现对地震能量的分级释放，形成结构抗震的三道防线。为了探讨密肋复合墙体中各道抗震防线对抗震性能的影响，进行了2组复合墙体的试验研究。观察了墙体的主要破坏形态和破坏过程，分析了墙体的承载力、滞回特征、延性、刚度、耗能能力等抗震性能。研究表明：肋格约束下的填充砌块极限承载力明显提高，屈服位移减小，延性降低。加外框的墙体比不加外框的墙板承载力明显提高。屈服荷载之前主要为砌块开裂耗能，屈服荷载后主要为裂缝的开裂闭合及相互摩擦耗能，标准墙板中的砌块及墙板内裂缝分别受到肋格和外框的约束，摩擦耗能较为充分。在密肋结构中，可以通过调整每道防线的设计参数来改变三道抗震防线的发生顺序及耗能性能，实现三道抗震防线的量化设计。

Experimental study on seismic performance of multi-grid composite wall structure system

The unique multi-ribbed composite wall structure show in the failure mode of block→grid→outer frame under seismic, achieve the classification of seismic energy release, form triple seismic fortification lines. In order to explore the seismic performance, two groups of the composite wall are studied. The main destruction mode and the main failure process of the wall is Observed, the seismic performance about the bearing capacity of the wall, hysteresis characteristics, ductility, stiffness, energy dissipation is analyzed Studies show that: under the constraint of filling rib grid block ,the bearing capacity significantly improved, the yield displacement reduced, ductility decreased. Compared to non-framed wall panels, the framed wall capacity improved significantly. Prior to the yielding the main energy consumptive for the block cracking, after the yielding the main energy consumptive for crack closure and friction between the crack, the blocks and cracks of the standard wall constraints respectively by the rib grid, friction consumption can be more adequately. In the ribbed structure, by adjusting the design parameters of each line of defense, the order of triple seismic fortification lines and seismic energy performance can be changed ,and the quantify seismic design of triple seismic fortification lines is achieved.