Cyclic testing of thin-walled circular steel tubular columns filled with demolished concrete blocks and fresh concrete

摘要: Abstract To simplify the waste concrete recycling process, authors have proposed several new kinds of structural members containing demolished with a distinctly larger size than conventional recycled aggregates. Previous researches and applications preliminarily verified suitability these environment-friendly members. The objective presented research is to provide test data study seismic performance evaluate strength ductility thin-walled circular steel tubular column filled blocks (DCBs) fresh (FC). Fifteen specimens, including 10 columns DCBs FC 5 reference alone, were tested under combined constant axial compression reversed cyclic lateral loadings. Test variables are: replacement ratio DCBs, thickness tube, load ratio. Based on concept old in some design codes are employed predict specimens. Research findings indicate that: (1) similar that alone; (2) slightly lower (3) even though diameter-to-thickness only 168, ultimate drift such specimen an 0.4 can reach 4%, showing good deformation capacity.