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

Abstract

An analytical model of a double-skinned composite tubular (DSCT) column was developed and verified using test results. The experimental results demonstrated the rigour and the validity of the present analytical model. Brief parametric studies were carried out for DSCT columns. The developed model considered the confining effect and material non-linearity of concrete. By the buckling or yielding condition of the inner tube of a DSCT column, its failure mode and concrete model were defined. The strength of concrete, the hollow ratio of a DSCT column, and the thickness of an inner tube were selected as the main parameters that affect the behaviour of a DSCT column. The analysis results showed that concrete strength and the thickness of the inner tube affect the axial strength and moment capacity of the column, while the hollow ratio affects only its axial strength.

Rollover instability of precast girders subjected to wind load

“…The recent collapses of such long precast bridge girders has thus prompted an awareness of the rollover instability of concrete and prestressed beams. The stability problem has also become a major issue in various types of structures such as composite columns, precast concrete walls and foamed concrete (Han et al, 2013;Jones et al, 2016;Yooprasertchai et al, 2016).…”

Experimental Comparison for Flexural Behavior of Concrete Filled Tubular and Double-Skinned Composite Tubular Columns

“…SC구조의 경우, 원자력발전소 구조물 적용을 목적으로 연구가 활발히 진행되어 설계기준이 발간되었으며(Korean Electric Association, 2010), SC 구조 벽체의 거동 (Chung and Lee, 2012)과 내력에 대한 평가 (Chung et al, 2013) (Wei et al, 1995a(Wei et al, , 1995bZhao and Grzebieta 2002;Tao et al, 2004), 섬유보강 폴리머 (FRP: Fiber Reinforced Polymer)관을 적용한 하이브 리드 기둥에 대한 연구도 수행된 바 있다 (Teng et al, 2007;Yu et al, 2006). 구속효과를 고려한 DSCT 기둥의 비선형 재료모델과 휨거동에 대한 연구는 Han et al (2010연구는 Han et al ( , 2013에 의해 수행 되었으며, 그들은 DSCT 기둥의 파괴모드와 콘크 리트의 재료모델을 제안하고 (Han et al, 2010), DSCT 기둥의 비선형 해석 모델을 제안하고 휨거동을 분석하였다 (Han et al, 2013). 최근에는 DSCT 구조를 적용한 풍력발전 타워에 대한 연구도 수행되고 있으며 (Han et al, 2015;Han et al, 2016;Yi and Han, 2016;Hong et al, 2016a), 강관 이외에도 FRP관을 적용한 DSCT 풍력발전 타워에 대한 연구도 수행되 고 있으며 (Hong et al, 2016b), DSCT 구조의 적용 범위가 확대되고 있는 추세이다.…”