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RISS 인기검색어
- 검색키워드
- 저자 : Marios Theofanous (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Numerical Modelling and Design of Stainless Steel Double Extended End-Plate Beam-to-Column Joints
Huanxin Yuan,Jundong Gao,Marios Theofanous 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.6
The structural performance of stainless steel beam-to-column joints with double extended end-plate connections is numerically studied in this paper. Finite element (FE) models were developed and validated against previously reported experimental results including static and cyclic loading tests on stainless steel double extended end-plate beam-to-column joints. Based upon the validated FE models, parametric studies were carried out to examine the impact of key parameters, such as the stainless steel grade, the bolt pretension force, the column axial force, the end-plate thickness, the bolt diameter and the presence of rib stiff eners, on the structural behaviour of stainless steel beam-to-column joints. The component method specifi ed in EN 1993-1-8 for design of joints was used to develop a modifi ed design method, which accounts for the strain hardening characteristics of stainless steel and the strengthening eff ect of the rib stiff eners. Moreover, the infl uence of the panel zone thickness and the end-plate thickness on the hysteretic performance of stainless steel joints was explored, and the ability of the modifi ed method to accurately predict the hysteretic properties of joints under cyclic loading was also demonstrated. It can be concluded that the newly proposed design approach based on the component method leads to more accurate predictions of both the static and the hysteretic properties of stainless steel end-plate beam-to-column joints.
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Push-out tests and bond strength of rectangular CFST columns
Xiushu Qu,Zhi-Hua Chen,David A. Nethercot,Leroy Gardner,Marios Theofanous 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.19 No.1
Push-out tests have been conducted on 18 rectangular concrete-filled steel tubular (CFST) columns with the aim of studying the bond behaviour between the steel tube and the concrete infill. The obtained load-slip response and the distribution of the interface bond stress along the member length and around the cross-section for various load levels, as derived from measured axial strain gradients in the steel tube, are reported. Concrete compressive strength, interface length, cross-sectional dimensions and different interface conditions were varied to assess their effect on the ultimate bond stress. The test results indicate that lubricating the steel-concrete interface always had a significant adverse effect on the interface bond strength. Among the other variables considered, concrete compressive strength and cross-section size were found to have a pronounced effect on the bond strength of non-lubricated specimens for the range of cross-section geometries considered, which is not reflected in the European structural design code for composite structures, EN 1994-1-1 (2004). Finally, based on nonlinear regression of the test data generated in the present study, supplemented by additional data obtained from the literature, an empirical equation has been proposed for predicting the average ultimate bond strength for SHS and RHS filled with normal strength concrete.
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