带竖缝砌体填充墙钢筋混凝土框架结构抗震性能试验研究

为了研究带竖向缝槽砌体填充墙对框架结构抗震性能的影响，开展了3榀带竖向缝槽砌体填充墙框架结构模型、1榀整体砌体填充墙框架结构模型和1榀纯框架结构模型在低周反复荷载作用下的对比试验。对比分析了各试件的破坏特征、滞回曲线、骨架曲线、位移延性、刚度退化、承载力退化和耗能性能等。结果表明：砌体填充墙的存在显著提高了框架结构的抗侧刚度和水平承载力，砌体填充墙参与了结构的滞回耗能，砌体填充墙框架的累积耗能能力明显优于纯框架；在填充墙与框架柱间设置一定宽度的竖向缝槽，减少了两者间的相互作用，延缓了填充墙和框架梁、柱的开裂，其水平承载力介于纯框架和整体填充墙框架之间，但其延性和耗能能力得到了较大的改善；在填充墙中设置一定宽度的竖向缝槽形成带竖向缝槽砌体填充墙框架，其水平承载力介于纯框架和整体填充墙框架水平承载力之间，其极限位移角与纯框架的基本相同，具有较好的延性和耗能能力。

Experimental study on seismic behavior of slitted masonry in-filled reinforced concrete frame structure

In order to investigate the effects of slitted masonry in-fill walls on the seismic behavior of the reinforced concrete frame structure, comparison tests of three frame structures with slit masonry in-fill wall, one frame structures with masonry in-fill wall and one bare frame structure subjected to low cycle reversed load were carried out. The damage characteristics, load-displacement hysteretic curves, skeleton curves, displacement ductility, rigidity degradation, bearing capacity degradation and energy dissipation of specimens were analyzed. The test results show that the masonry in-fill wall enhances the lateral stiffness and bearing capacity of frame structures and contributes to the hysteretic energy of structure. The cumulative energy dissipation capacity of masonry in-fill wall frames is significantly better than that of bare frame. Due to the vertical slit with a certain width between the in-fill wall and the frame column, the wall-column interaction can be reduced, and the cracking load of in-fill walls and the beams, columns of main frame are increased. The horizontal bearing capacity of the specimens is between that of bare frame and that of whole in-fill wall frames, while the displacement ductility and energy dissipation capacity of specimens are greatly improved. The ultimate inter-story drift ratio of the specimen is basically the same that of the bare frame. The specimens have good ductility and energy dissipation capacity.