Plastic buckling and axial crushing of concrete-filled steel tubes: usage of multiple wood blocks

摘要: Abstract This paper aims to lighten the weight of concrete-filled steel tubes using wood blocks. Different proportions concrete were used in a way that blocks substituted with fraction small-scale columns. The behaviour composite members was compared reference specimens, i.e. fully tubes. Carbon Fibre Reinforced Polymer (CFRP) also employed as confining material for some effect which investigated. reduction timber provided evaluated against axial capacity each specimen. A new index is introduced quantify structural efficiency view evaluating change weight. parameter defined this determine and transitional response columns under compression between different peaks loads on load-displacement graphs. can further help reduce potential risks failure/collapse at post-peak stages. key finding number specimens same volume did not affect capacity, paves path designing multiple numbers. Despite significant difference strength concrete, by proportionate (was smaller) two materials, nor reduction. disproportion, be due interaction all three structurally desirable especially seismic design where total plays role. attributed usage stronger thicker acting material, advised similar structures based results study.