Nonlinear concrete model for double-skinned composite tubular columns

Performance of a double-skinned composite tubular column under lateral loading: analysis

“…For the development of a nonlinear DSCT column model, the definition of failure mode and nonlinear concrete model proposed by Han et al (2010) were adopted. The failure modes of a DSCT column are categorised into three cases (Han et al, 2010).…”

“…In this study, an analytical model of a DSCT column is proposed using section analysis and a curvature function. The developed model adopted the definition of failure mode and the nonlinear concrete model for a DSCT column that were suggested by Han et al (2010). The proposed model predicted the behaviour of a DSCT column with acceptable accuracy through the axial load-bending moment (P-M) interaction, lateral load-lateral displacement (F-) relation, yield strength, ultimate strength, yield displacement, ultimate displacement, yield energy, ultimate energy, and the ductility factors.…”

Applicability of Double-Skinned Composite Tubular Member for Offshore Wind Turbine Tower

“…구속효과를 고려한 DSCT 기둥의 비선형 재료모델과 휨거동에 대한 연구는 Han et al(2010연구는 Han et al( , 2013에 의해 수행 되었으며, 그들은 DSCT 기 둥의 파괴모드와 콘크리트의 재료모델을 제안하고 (Han et al, 2010), DSCT 기둥의 비선형 해석 모델을 제안하고 휨 거동을 분석하였다 (Han et al, 2010). 내부관의 항복 파괴가 발생하지 않을 최소 두께(t iy )와 좌굴 파괴가 발생하지 않을 최소 두께(t ibk ) 중, 작은 값을 t lim 라 정의하면 내측부관의 두께(t i )에 의한 부재의 파괴 형태는 Eq.…”

“…One has steel tubes and the other has fiber reinforced polymer(FRP) tubes. The developed software adopted the nonlinear material model and the nonlinear column model which was proposed by Han et al(2010Han et al( , 2013. If an outer diameter, material properties and requested capacities are given for the DSCT wind power tower, the developed software performs axial force-bending moment interaction analyses for hundreds of sections of the tower and suggests ten optimized section designs.…”

Experimental and numerical studies of short concrete-filled double skin composite tube columns under axially compressive loads

“…To explore the structural behavior of inclined and tapered concrete filled steel tubular members under axial compression, a series of experiments were conducted by Han et al [13]. Han et al proposed a nonlinear model for the analysis of double skin composite tubes by modification of Mander's unified concrete model [14]. A similar nonlinear model was also used by Hu and Su to analyze the concrete-filled double skin tubular columns with circular crosssection, subjected to axial compressive loads [15].…”