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- 저자 : Chaoqing Yuan (검색결과 2 건)
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Jing Ji,Zhichao Xu,Liangqin Jiang,Chaoqing Yuan,Yunfeng Zhang,Lijian Zhou,Shilong Zhang 한국강구조학회 2018 International Journal of Steel Structures Vol.18 No.4
This paper was concerned with the nonlinear analysis on the overall stability of H-type honeycombed composite column with rectangular concrete-fi lled steel tube fl anges (STHCC). The nonlinear analysis was performed using ABAQUS, a commercially available fi nite element (FE) program. Nonlinear buckling analysis was carried out by inducing the fi rst buckling mode shape of the hinged column to the model as the initial imperfection with imperfection amplitude value of L /1000 and importing the simplifi ed constitutive model of steel and nonlinear constitutive model of concrete considering hoop eff ect. Close agreement was shown between the experimental results of 17 concrete-fi lled steel tube (CFST) specimens and 4 I-beams with top fl anges of rectangular concrete-fi lled steel tube (CFSFB) specimens conducted by former researchers and the predicted results, verifying the correctness of the method of FE analysis. Then, the FE models of 30 STHCC columns were established to investigate the infl uences of the concrete strength grade, the nominal slenderness ratio, the hoop coeffi cient and the fl ange width on the nonlinear stability capacity of SHTCC column. It was found that the hoop coeffi cient and the nominal slenderness ratio aff ected the nonlinear stability capacity more signifi cantly. Based on the results of parameter analysis, a formula was proposed to predict the nonlinear stability capacity of STHCC column which laid the foundation of the application of STHCC column in practical engineering.
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Jing Ji,Bing Li,Wenfu Zhang,Yingchun Liu,Chaoqing Yuan,Fei Xing 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.1
In order to study the cross-type rigid steel frame node hysteretic behavior of components, the axial compression ratio, H type steel column web thickness, girder section and stiffener as design parameters, 8 steel frame cross-type rigid joints and a T-type rigid joint are designed. Based on simplified mechanical model and constitutive relations of material, using ABAQUS software the corresponding finite element model is established and the hysteretic performance analysis is carried out. Through comparison between given T-type node test results and analysis results, both are in good agreement, thus the rationality of the finite element model established in this paper is verified. Simulation analysis of cross-type node is developed in further, load -displacement hysteretic curve of nodes, skeleton curve, envelope figure and the stress nephogram are extracted and comparative analysis is conducted, influence regularity of four parameters on the seismic behavior of the joints is obtained. The corresponding design suggestion for the axial compression ratio and column web and flange thickness ratio is proposed, design limit value of axial compression ratio of column should be taken as 0.5 and limit value of column web and flange thickness ratio is taken as 0.75,and these can provide reference for actual engineering design.
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