首页|Seismic behaviour of stainless-clad bimetallic steel welded tubular T-joint
Seismic behaviour of stainless-clad bimetallic steel welded tubular T-joint
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NETL
NSTL
Elsevier
This paper investigated the seismic behaviour of stainless-clad (SC) bimetallic steel welded T-joints through experimental study and numerical simulation. Seven T-joint specimens were tested, and the influences of the welded section types, welding configurations between the chord and brace, steel grades, and the brace-to-chord width ratios were clarified through comparative research on the test phenomenon, failure modes, hysteretic behaviour, ductility, and energy dissipation. Besides, refined finite element (FE) models were established using simplified modelling approaches. Model verification and parameter analysis were conducted, focusing on parameters such as brace-to-chord width ratio, chord stress ratio, and plate clad ratio. Research showed that all specimens failed through weld fracture between the chord and brace, with only minor deformation observed in the chord walls; the joint moment resistance under cyclic loading ranged from 70 % to 85 % of that under monotonic loading, with corresponding rotation ratios of 0.5-0.6; these T-joints demonstrated excellent ductility and energy dissipation, with ductility indices exceeding 3.0 and energy dissipation coefficients ranging from 20 to 45; the lager brace-to-chord width ratio could result in the larger joint moment resistance and initial stiffness; the welded section types and welding configurations had negligible effects on seismic behaviour. Based on these findings, a restoring force model was developed to accurately represent the moment-rotation behaviour as well as to assist in the design of the SC bimetallic steel welded tubular T-joints.
Stainless-clad bimetallic steelTubular T -jointSeismic behaviourIn-plane bendingRestoring force modelFATIGUE BEHAVIORCHS BRACEDESIGNTESTS
Yang, Xiaofeng、Ban, Huiyong、Wang, Yuanqing
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Tsinghua Univ||Tsinghua Univ||The Hong Kong Polytechnic University Department of Civil and Environmental Engineering||Hong Kong Polytech Univ
NETL
NSTL
Elsevier
