Compression behaviours of CFSTs using stainless-steel tubes at low temperatures

被引:7
作者
Chen, Minghui [1 ]
Yan, Jia-Bao [1 ]
机构
[1] Tianjin Univ, Sch Civil Engn, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300350, Peoples R China
基金
中国国家自然科学基金;
关键词
Stainless steel; CFST; Cold region; Compression test; Finite element; Low temperature; ABAQUS; STUB COLUMNS; NONLINEAR-ANALYSIS; CONCRETE; PERFORMANCE; STRENGTH;
D O I
10.1016/j.jcsr.2023.108120
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper made pilot studies on behaviours of concrete-filled stub square stainless-steel tubes (CFSSSTs) subjected to low-temperature compression. Firstly, 16 CFSSSTs were tested under low-temperature axial compression. This testing program studied the effects of testing temperature (T) and SS-tube wall thickness (t). The tests showed that local buckling, corner-region splitting fracture, and concrete crushing occurred to CFSSSTs. The compressive load-shortening curves behaved a four-stage manner, which behaved differently from those hollow stainless-steel tubes (HSSTs). Compared with the common concrete-filled steel tube columns, the CFSSSTs exhibit a higher ductility. Studies showed that reducing T improved the compression capacity (Pu) but compromised the ductility of CFSSSTs; increasing the t of HSSTs improved the compression behaviour of CFSSSTs; filling concrete to the HSSSTs significantly improved the compression behaviour of CFSSSTs. This study also developed 3D finite element models (FEM) for the CFSSSTs using the low-temperature mechanical properties of both HSSTs and concrete, which accurately predicted compression behaviours of CFSSSTs at low temperatures. Moreover, the prediction equations in different codes were also adopted to predict the low-temperature Pu of CFSSSTs. Validations showed that these code equations provided about 15% underestimations on Pu, and they were recommended to predict Pu of CFSSSTs at low temperatures.
引用
收藏
页数:17
相关论文
共 58 条
[41]   Tests on plain and steel fiber concrete-filled stainless steel tubular columns [J].
Tokgoz, Serkan .
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2015, 114 :129-135
[42]   Behaviour of short and slender concrete-filled stainless steel tubular columns [J].
Uy, Brian ;
Tao, Zhong ;
Han, Lin-Hai .
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, 2011, 67 (03) :360-378
[43]   Experimental and analytical studies on CFRP strengthened circular thin walled CFST stub columns under eccentric compression [J].
Wang, Jingfeng ;
Shen, Qihan ;
Wang, Fengqin ;
Wang, Wei .
THIN-WALLED STRUCTURES, 2018, 127 :102-119
[44]   Mechanical properties of Q690E/Q960E high-strength steels at low and ultra-low temperatures: Tests and full-range constitutive models [J].
Xi, Rong ;
Xie, Jian ;
Yan, Jia-Bao .
THIN-WALLED STRUCTURES, 2023, 185
[45]   Mode I fracture behaviors of concrete at low temperatures [J].
Xie, Jian ;
Liu, Yang ;
Yan, Ming-Liang ;
Yan, Jia-Bao .
CONSTRUCTION AND BUILDING MATERIALS, 2022, 323
[46]   Experimental studies and analysis on compressive strength of normal-weight concrete at low temperatures [J].
Xie, Jian ;
Yan, Jia-Bao .
STRUCTURAL CONCRETE, 2018, 19 (04) :1235-1244
[47]   Experimental study on the axial-compression performance of concrete at cryogenic temperatures [J].
Xie, Jian ;
Li, Xiaomei ;
Wu, Honghai .
CONSTRUCTION AND BUILDING MATERIALS, 2014, 72 :380-388
[48]   LOW-TEMPERATURE COMPRESSION BEHAVIOUR OF CIRCULAR STUB STAINLESS-STEEL TUBULAR COLUMNS [J].
Yan, Jia-Bao ;
Zhang, Biao ;
Feng, Jun-Ying ;
Du, Yan-Sheng ;
Luo, Yun-Biao ;
Shi, Yun-Dong .
ADVANCED STEEL CONSTRUCTION, 2022, 18 (03) :670-678
[49]   Mechanical properties of stainless steel QN1906Mo at sub-zero temperatures: Tests and stress-strain models [J].
Yan, Jia-Bao ;
Zhang, Biao ;
Yu, Xin ;
Xie, Jian .
THIN-WALLED STRUCTURES, 2022, 179
[50]   Low-temperature mechanical properties of stainless steel 316L: Tests and constitutive models [J].
Yan, Jia-Bao ;
Geng, Yiteng ;
Xie, Peng ;
Xie, Jian .
CONSTRUCTION AND BUILDING MATERIALS, 2022, 343