足尺蒸压加气混凝土砌块填充墙RC框架抗震性能试验研究

Experimental study on seismic performance of full-scale RC frame infilled with autoclaved aerated concrete blocks

砌体填充墙框架结构是当前一种应用广泛的结构形式。文中进行10个足尺蒸压加气混凝土砌块填充墙RC框架在低周反复荷载下的抗震性能试验,探讨墙体与框架连接构造、墙体本身构造措施等因素对框架整体抗震特性的影响。研究表明：1蒸压加气混凝土砌块填充墙可显著提高混凝土框架的水平承载能力,与纯框架相比,普通的填充墙框架试件的屈服、峰值、极限荷载分别提高了31%~159%、51%~156%、45%~123%;2相比普通构造的框架填充墙,采用柔性连接或与柱脱开构造时,填充墙对混凝土框架的承载力、变形性能、刚度、耗能等影响降低,特别是前期服役性能。另外,采用拉结筋的连接方式比采用L形铁件更加直接、有效。这将为蒸压加气混凝土砌块填充墙框架抗震性能评估和设计提供指导作用。

The infilled frame structure is a widely used structural form. The seismic experiments of ten full-scale RC frames infilled with autoclaved aerated concrete blocks under low frequency cyclic loading were carried out. The influences of the connecting conformation between infilled wall and frame, seismic conformation of infilled wall on the seismic behavior were discussed. The analysis results show that the autoclaved aerated concrete block infilled wall can improve significantly the horizontal bearing capacity of RC frames. Compared with the pure RC frame, the yield loads, maximum loads and ultimate loads of common infilled frames are respectively increased by 31% - 159%, 51% - 156%, 45% - 123%. Compared with the common infilled wall, the influence of infilled wall on the seismic behavior of RC frame decreases when the infilled wall is disconnected with columns or flexibly connected with columns. Especially the prophase service properties, such as bearing capacity, deformation, stiffness, energy dissipation and so on, are greatly changed. Meantime, the connecting mode with annectent reinforcing bar is more effective than that of iron hardware with L shape. The research will provide reference for the seismic evaluation and design of full-scale RC frames infilled with autoclaved aerated concrete blocks.