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Gusset plate

About: Gusset plate is a research topic. Over the lifetime, 1270 publications have been published within this topic receiving 6917 citations.


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TL;DR: In this article, a balanced gusset plate design approach is proposed in which the yield mechanisms of the brace are balanced with the yield mechanism of the connection and the failure modes of the system to achieve a target yielding hierarchy and suppress unwanted failure modes.
Abstract: Current design practices use a strength-based design approach to design gusset plate connections in special concentrically braced frames (SCBFs), in which the expected tensile and compressive capacities of the brace are used to design the gusset plate and the weld used to connect the brace to the frame. To achieve brace end rotation, the gusset plate is sized using a linear offset rule, and large, uneconomical gusset plate connections may result. A research program was undertaken to improve the economy and performance of gusset plate connections. A new approach is proposed in which the gusset plate design is based on a balanced design approach in which the yield mechanisms of the brace are balanced with the yield mechanisms of the connection and the failure modes of the system to achieve a target yielding hierarchy and suppress unwanted failure modes. Full-scale one-story, one-bay frames were designed and tested to investigate the seismic performance of current and proposed design methods. In the test program, variations in balance factors between the brace, gusset plate, and weld were considered to study the proposed method, to evaluate possible yield mechanisms and failure modes, and to obtain the desired yielding hierarchy. Comparison of the observed and measured performance of each specimen is made and specific design expressions to improve the seismic engineering of SCBF systems are proposed.

169 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed a modeling approach for SCBFs to more accurately predict their seismic performance, using beam-column elements for the brace, beams and columns and these elements include nonlinear geometric effects to simulate brace buckling.

160 citations

Journal ArticleDOI
TL;DR: The I-35W bridge over the Mississippi River in Minneapolis, Minnesota, collapsed suddenly on August 1, 2007 as discussed by the authors, and the results of the investigation and conclusions of the analysis include that the NTSB-disclosed undersized gusset plates are the consequence of a bias toward a "one-dimensional model" in the original design that did not give sufficient consideration to the effects of the forces from diagonal truss members.
Abstract: The I-35W bridge over the Mississippi River in Minneapolis, Minnesota, collapsed suddenly on August 1, 2007. This note briefly summarizes an analysis based on original design drawings, an investigation of material evidence provided by the National Transportation Safety Board (NTSB), and a full-scale load rating of the bridge superstructure. The results of the investigation and conclusions of the analysis include. (i) The thickness of gusset and the thickness of the side wall of the upper chords were designed proportional to the bending moment solution of a one-dimensional influence line analysis. This fact reveals that the NTSB-disclosed undersized gusset plates are the consequence of a bias toward a “one-dimensional model” in the original design that did not give sufficient consideration to the effects of the forces from diagonal truss members. (ii) Although the bridge’s truss-cell structure was appropriately designed, the design of the node that connected the floor members to the main truss-frame was in...

113 citations

Journal ArticleDOI
TL;DR: In this paper, a full-scale 3-story 3-bay concrete-filled tube (CFT)/buckling-restrained braced frame (BRBF) specimen was tested using psuedo-dynamic testing procedures.
Abstract: This paper is Part II of a two-part paper describing a full-scale 3-story 3-bay concrete-filled tube (CFT)/buckling-restrained braced frame (BRBF) specimen tested using psuedo-dynamic testing procedures. The first paper described the specimen design, experiment, and simulation, whereas this paper focuses on the experimental responses of BRBs and BRB-to-gusset connections. This paper first evaluates the design of the gusset connections and the effects of the added edge stiffeners in improving the seismic performance of gusset connections. Test results suggest that an effective length factor of 2.0 should be considered for the design of the gusset plate without edge stiffeners. Tests also confirm that the cumulative plastic deformation (CPD) capacity of the BRBs adopted in the CFT/BRBF was lower than that found in typical component tests. The tests performed suggest that the reduction in the BRB CPD capacities observed in this full-scale frame specimen could be due to the significant rotational demands imposed on the BRB-to-gusset joints. A simple method of computing such rotational demands from the frame inter-story drift response demand is proposed. This paper also discusses other key experimental responses of the BRBs, such as effective stiffness, energy dissipation, and ductility demands. Copyright © 2008 John Wiley & Sons, Ltd.

113 citations

Journal ArticleDOI
TL;DR: A robust method for crack detection using the concept of transfer learning as an alternative to training an original neural network is developed and transfer learning methods using the output features of VGG16 achieved both improved accuracy and robustness and are recommended for training a crack classifier.

109 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202150
202043
201956
2018120
201794
201669