EXPERIMENTAL STUDY ON LATERAL STIFFNESS OF STEEL RECYCLED CONCRETE FRAME WITH RECYCLED CONCRETE HOLLOW BLOCK WALL

In order to study the lateral resistance of shaped steel-recycled concrete structures, low-cyclic reversed loading tests were carried out on 3 models of a shaped steel recycled concrete- recycled concrete hollow block wall hybrid structure. Based on the loading process and failure pattern of the specimens, the mechanical performance and seismic behavior of the shaped steel recycled concrete columns-reinforced recycled concrete beam structure were studied, and the influence of the recycled concrete hollow block wall on the bearing capacity and lateral stiffness of the frame was obtained. The changes in bearing capacity and stiffness of the structure under different loading phases and the rules governing structural stiffness degradation under circulating load at one level was analyzed. It was found that shaped steel recycled concrete frames with recycled concrete hollow block wall structure has high bearing capacity and lateral stiffness. A full-height wall has a great influence on the lateral stiffness. It has high initial stiffness, however that stiffness decreases rapidly. With a half-height wall, the structure has increased bearing capacity and stiffness at the initial loading stage, but displays degradation of bearing capacity and lateral stiffness similar to the bare frame’s.