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Recycled concrete brick (RCB) is manufactured by recycled aggregate processed from discarded concrete blocks arising from the demolishing of existing buildings. This paper presents research on the seismic performance of RCB masonry walls to assess the applicability of RCB for use in rural low-rise constructions. The seismic performance of a masonry wall is closely related to the vertical load applied to the wall. Thus, the compressive performance of RCB masonry was investigated firstly by constructing and testing eighteen RCB masonry compressive specimens with different mortar strengths. The load-bearing capacity, deformation and failure characteristic were analyzed, as well. Then, a quasi-static test was carried out to study the seismic behavior of RCB walls by eight RCB masonry walls subjected to an axial compressive load and a reversed cyclic lateral load. Based on the test results, equations for predicting the compressive strength of RCB masonry and the lateral ultimate strength of an RCB masonry wall were proposed. Experimental values were found to be in good agreement with the predicted values. Meanwhile, finite element analysis (FEA) and parametric analysis of the RCB walls were carried out using ABAQUS software. The elastic-plastic deformation characteristics and the lateral load-displacement relations were studied.

Summary To study the seismic behavior of specially shaped concrete‐filled tube (CFT) columns with multiple cavities under axial tension or axial compression, a quasistatic test of four 1/30‐scale specially shaped CFT columns with multiple cavities was conducted based on the CFT mega columns in a super‐high‐rise building. The main parameters of the 4 specimens were the direction of axial force, the direction of horizontal force, and the cross‐sectional structural form. The test was conducted twice at each level of horizontal displacement. The results shows that the compression–flexure test specimen showed lower yield damage, higher bearing capacity, and superior seismic performance relative to the tension–flexure test specimen; the specimen loaded along the short axis of the section had a lower bearing capacity and stiffness relative to the specimen loaded along the long axis; and the corner‐reinforced specimen with a round steel pipe was found to be rationally designed and properly constructed. Finally, an N–M correlation curve was generated and found to show satisfactory agreement between the fitted values and the test values.