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The obj tive of this paper is to demonstrate the aseismic capacity of concrete − mled tubular members su切 ted to cyclic axial load． About fi fty specimens composed of cold − formed circular tubes and normal concrete were tested to quan 丘fy the number of ioading cycles and Ihe amount ef dissipated energy upto breaking failure afier local buckling ． The test shows that both山e failure cycle and the dissipated energy are fa廿ly increased by filling ［ he tube wilh concrete ． The span of life of concrete ・ filled tubular member is affected by 血e diameter − thickness ratio， effective length and amplitude of axial displacement ， and 正 s successfully predicted by an e曲 mation me 【 hod proposed by authors ． 皿 】 e dissip 飢ed energy upto failure c 跚 be also predicted by means of multiplying Ihe number of load血 g cycles upto failure a皿 d由e dissipated energy at each loading cyc 正 e ， The dissipated energy a皿 d

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