整体钢框架内嵌加气混凝土填充墙板足尺模型振动台试验研究

In order to study the influence of embedded autoclaved lightweight concrete (ALC) wall panel on the seismic performance of frame structure, a full-scale shaking table test was carried out on a steel frame structure embedded with ALC wall panels with holes. An embedded joint was used to reduce the damage to the walls caused by the joint, and the window openings were reinforced by self-tapping bolts. The vibration characteristics of the steel frame and the damage to the wall panels were experimentally examined. The effects of embedding ALC wall panels on the vibration frequency, damping ratio, stiffness, acceleration and displacement of the steel frame were analyzed. It is found that, the lateral stiffness of the steel frame with ALC wall panels is increased by 111% for each storey. The damping ratio of the steel frame structure with the wall panels is 6.94%, larger than the design standard of 3% for structures. The lateral displacement of the wall panels is slightly smaller than that of frame structure, implying that the joint helps to reduce the seismic response of the ALC wall panels. With increase in the imposed earthquake intensity, the acceleration amplification factor of the frame structure increases, indicating that the structure starts to behave plastically. The drift ratio of the wallboard reaches 1/49 under a rare earthquake of 8-degree, where the wallboard neither falls off nor collapses, demonstrating that the wall panels and joints exhibit good seismic performances.