Collapse Load Analysis of Bending Plates by a New Discrete Model

Kawai, Tadahiko; Kondou, Kazuo

doi:10.2534/jjasnaoe1968.1977.142_190

Cited by 4 publications

(2 citation statements)

References 1 publication

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“…Gusset deformation can be modeled as a concentrated rotational spring with an initial stiffness K Rg and yield moment M y g . The AIJ Recommendations [1] list a method to estimate K Rg developed by Kinoshita et al [7], based on Kawai and Kondou's [8] rigid beam spring model (RBSM). The out-of-plane stiffeners and beam/column flanges are assumed to be rigid, and the gusset is subdivided into quadrilateral panels.…”

Section: Gusset Stiffnessmentioning

confidence: 99%

“…2a,b) are employed, as the plate out-of-plane flexibility both decreases the elastic buckling load and shifts Pδ demand from the gusset to the highly loaded neck (ie the core extension just outside the restrainer). Kinoshita et al [7] applied plate theory (based on Kawai and Kondou [8]) to determine K Rg for edge stiffened gussets (Fig. 2c), while Lanning [4] proposed an integrated beam slice method.…”

Section: Introductionmentioning

confidence: 99%

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Flexural Properties of Buckling-Restrained Brace Connections

Sitler

Takeuchi

Matsui

2018

KEM

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Buckling-restrained braces (BRBs) achieve large peak and cumulative ductility capacities by restricting yielding to an encased core, while maintaining global stability. However, stability is often governed by the connections and is sensitive to the end fixity provided by the adjacent framing and gusset, and flexural continuity between the neck and restrainer. This paper presents simple analytical methods to determine the flexural properties of these key components. Full-depth gusset stiffeners are found to be highly effective in increasing the out-of-plane rotational stiffness (KRg), equivalent to doubling the thickness. An equivalent connection is proposed to account for the adjacent framing (KRf), but this may be neglected if KRf > 10∙KRg. This is typically satisfied if a diaphragm slab and transverse beam are provided, but may exceed beam torsional bracing requirements. The restrainer end moment transfer capacity is extended to mortar-filled RHS restrainers, confirming that neck insert ratios of Lin/Bn > 2.0 are required for full continuity.

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Section: Gusset Stiffnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexural Properties of Buckling-Restrained Brace Connections

Sitler

Takeuchi

Matsui

2018

KEM

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Role of FEM in Spring Analysis

Shimoseki

Hamano

Imaizumi³

2003

FEM for Springs

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Out-of-Plane Stiffness and Yield Strength of Cruciform Connection for Buckling-Restrained Brace

Kinoshita¹,

Koetaka²,

Inoue³

et al. 2008

Nihon Kenchiku Gakkai Kozokei Ronbunshu

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In order to prevent out-of-plane buckling of buckling-restrained brace, its connections must have enough out-ofplane stiffness and be kept elastic. This paper deals with out-of-plane stiffness and yield strength of bucklingrestrained brace's connection whose section is cruciform. Firstly, methods of calculating both out-of-plane stiffness and yield strength of connection are proposed by means of RBSM. And secondly, experimental verifications to load connection specimens were conducted. As a result, it is clarified that out-of-plane stiffness is very small if finstiffener is not connected to beam-flange. Therefore, it is recommended that fin-stiffener should be welded to beamflange to satisfy required out-of-plane stiffness and yield strength.

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Collapse Load Analysis of Bending Plates by a New Discrete Model

Cited by 4 publications

References 1 publication

Flexural Properties of Buckling-Restrained Brace Connections

Flexural Properties of Buckling-Restrained Brace Connections

Role of FEM in Spring Analysis

Out-of-Plane Stiffness and Yield Strength of Cruciform Connection for Buckling-Restrained Brace

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