Axial compressive performance of circular CFST columns partially wrapped by carbon FRP
作者： Qihan Shen , Jingfeng Wang , Jiaxin Wang , Zhaodong Ding
DOI: 10.1016/J.JCSR.2018.12.017
关键词: Axial load 、 Stiffness 、 STRIPS 、 Bearing capacity 、 Structural engineering 、 Stub (electronics) 、 Fibre-reinforced plastic 、 Buckling 、 Composite number 、 Materials science
摘要: Abstract To explore the axial compression property and failure mechanism of concrete-filled steel tubular (CFST) columns partially wrapped by carbon-fibre-reinforced polymer (FRP), a series tests using carbon-FRP-strengthened circular CFST stubs slender imposed with loads were conducted. The effects various parameters including yield stress, number carbon-FRP layer, slenderness ratio composite column, spacing strip on load bearing capacities tested specimens studied. Moreover, behaviour composites was evaluated in terms force (N)–longitudinal shortening displacement (δ) curves, stiffness, strain response, strength enhancement indexes, ductility indexes. Subsequently, nonlinear finite element (FE) analysis modelling concerning surface contact action established validated experimentally. experimental analytical results indicate that strengthening stub wraps could improve their prevent outward local bulges for thin-walled tubes. Only slight effect observed when laterally confined strips used type columns. Finally, several simplified empirical formulas predicting capacity column are proposed.
sci-hub.se 参考文章(33)
Tarutal Ghosh Mondal, S. Suriya Prakash, Nonlinear Finite-Element Analysis of RC Bridge Columns under Torsion with and without Axial Compression Journal of Bridge Engineering. ,vol. 21, pp. 04015037- ,(2016) , 10.1061/(ASCE)BE.1943-5592.0000798
Ahmed W. Al Zand, Wan Hamidon W. Badaruzzaman, Azrul A. Mutalib, A.H. Qahtan, Finite element analysis of square CFST beam strengthened by CFRP composite material Thin-Walled Structures. ,vol. 96, pp. 348- 358 ,(2015) , 10.1016/J.TWS.2015.08.019
Zhi-Bin Wang, Qing Yu, Zhong Tao, Behaviour of CFRP externally-reinforced circular CFST members under combined tension and bending Journal of Constructional Steel Research. ,vol. 106, pp. 122- 137 ,(2015) , 10.1016/J.JCSR.2014.12.007
H.K. Lee, B.R. Kim, S.K. Ha, Numerical evaluation of shear strengthening performance of CFRP sheets/strips and sprayed epoxy coating repair systems Composites Part B-engineering. ,vol. 39, pp. 851- 862 ,(2008) , 10.1016/J.COMPOSITESB.2007.10.004
Ali A. Mortazavi, Kypros Pilakoutas, Ki Sang Son, RC COLUMN STRENGTHENING BY LATERAL PRE-TENSIONING OF FRP Construction and Building Materials. ,vol. 17, pp. 491- 497 ,(2003) , 10.1016/S0950-0618(03)00046-1
T. Jiang, J.G. Teng, Theoretical model for slender FRP-confined circular RC columns Construction and Building Materials. ,vol. 32, pp. 66- 76 ,(2012) , 10.1016/J.CONBUILDMAT.2010.11.109
Kang-Kyu Choi, Yan Xiao, Analytical Model of Circular CFRP Confined Concrete-Filled Steel Tubular Columns under Axial Compression Journal of Composites for Construction. ,vol. 14, pp. 125- 133 ,(2010) , 10.1061/(ASCE)CC.1943-5614.0000056
Wael F. Ragheb, Elastic local buckling of steel I-sections strengthened with bonded FRP strips Journal of Constructional Steel Research. ,vol. 107, pp. 81- 93 ,(2015) , 10.1016/J.JCSR.2015.01.009
X.H. Dai, D. Lam, N. Jamaluddin, J. Ye, Numerical analysis of slender elliptical concrete filled columns under axial compression Thin-walled Structures. ,vol. 77, pp. 26- 35 ,(2014) , 10.1016/J.TWS.2013.11.015
Hanbin Ge, Tsutomu Usami, Strength of Concrete‐Filled Thin‐Walled Steel Box Columns: Experiment Journal of Structural Engineering-asce. ,vol. 118, pp. 3036- 3054 ,(1992) , 10.1061/(ASCE)0733-9445(1992)118:11(3036)