OUT-OF-PLANE BUCKLING LOAD OF BUCKLING-RESTRAINED BRACES INCLUDING BRACE JOINTS

2004 ◽  
Vol 69 (581) ◽  
pp. 127-134 ◽  
Author(s):  
Hideaki TEMBATA ◽  
Yuji KOETAKA ◽  
Kazuo INOUE
Keyword(s):  
Buckling Load ◽  
Buckling Restrained Braces ◽  
Out Of Plane

scholarly journals CRITERIA OF BUCKLING-RESTRAINED BRACES TO PREVENT OUT-OF-PLANE BUCKLING

2007 ◽  
Vol 72 (621) ◽  
pp. 141-148 ◽  
Author(s):  
Tomohiro KINOSHITA ◽  
Yuji KOETAKA ◽  
Kazuo INOUE ◽  
Kunihiro IITANI
Keyword(s):  
Buckling Restrained Braces ◽  
Out Of Plane

scholarly journals OUT-OF-PLANE STABILITY FACTORS FOR DIAGONALLY INSTALLED BUCKLING RESTRAINED BRACES

2014 ◽  
Vol 79 (706) ◽  
pp. 1919-1929
Author(s):  
Hitoshi OZAKI ◽  
Yoshinao KONISHI ◽  
Ryota MATSUI ◽  
Toru TAKEUCHI
Keyword(s):  
Buckling Restrained Braces ◽  
Out Of Plane

Deformation of Perforated Aluminium Plates under In-Plane Compressive Loading

2016 ◽  
Vol 710 ◽  
pp. 357-362
Author(s):  
Irene Scheperboer ◽  
Evangelos Efthymiou ◽  
Johan Maljaars
Keyword(s):  
Research Work ◽  
Compressive Loading ◽  
Local Buckling ◽  
Buckling Load ◽  
Structural Behaviour ◽  
Critical Buckling Load ◽  
Out Of Plane ◽  
The Difference ◽  
Ultimate Resistance ◽  
Multiple Holes

Aluminium plates containing a single hole or multiple holes in a row are recently becoming very popular among architects and consultant engineers in many constructional applications, due to their reduced weight, as well as facilitating ventilation and light penetration of the buildings. However, there are still uncertainties concerning their structural behaviour, preventing them from wider utilization. In the present paper, local buckling phenomenon of perforated aluminium plates has been studied using the finite element method. For the purposes of the research work, plates with simply supported edges in the out-of-plane direction and subjected to uniaxial compression are examined. In view of perforations, circular cut-outs and the total cut-out size has been varied between 5 and 40% of the total plate area. Moreover, different perforation patterns have been investigated, from a single, central cut-out to a more refined pattern consisting of up to 25 holes equally distributed over the plate. Regarding the material characteristics, several aluminium alloys are considered and compared to steel grade A36 on plates of different slenderness. For each case the critical (Euler) buckling load and the ultimate resistance has been determined.A study into the boundary conditions of the plate showed that the restrictions at the edges parallel to the load direction have a large influence on the critical buckling load. Restraining the top or bottom edge does not significantly influence the resistance of the plate.The results showed that the ultimate resistance of aluminium plates containing multiple holes occurs at considerably larger out-of-plane displacement as that of full plates. For very large total cut-out, a plate containing a central hole has a larger resistance than a plate with equal cut-out percentage but with multiple holes. The strength and deformation in the post-critical regime, i.e. the difference between the critical buckling load and the ultimate resistance, differs significantly for different number of holes and cut-out percentage.

Flexural Properties of Buckling-Restrained Brace Connections

2018 ◽  
Vol 763 ◽  
pp. 916-923
Author(s):  
Ben Sitler ◽  
Toru Takeuchi ◽  
Ryota Matsui
Keyword(s):  
Global Stability ◽  
Analytical Methods ◽  
Flexural Properties ◽  
Rotational Stiffness ◽  
Transverse Beam ◽  
Buckling Restrained Brace ◽  
Highly Effective ◽  
Buckling Restrained Braces ◽  
Out Of Plane ◽  
Large Peak

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.

scholarly journals Improving the Structural Behavior of Tied-Arch Bridges by Doubling the Set of Hangers

2020 ◽  
Vol 10 (23) ◽  
pp. 8711
Author(s):  
Juan Manuel García-Guerrero ◽  
Juan José Jorquera-Lucerga
Keyword(s):  
Buckling Load ◽  
Structural Behavior ◽  
Wind Loading ◽  
Structural Systems ◽  
Critical Buckling Load ◽  
Out Of Plane ◽  
Arch Bridges ◽  
Transversal Stiffness ◽  
Single Set ◽  
General Reduction

In tied-arch bridges with a single arch, the deck is usually suspended from the arch by means of a single set of cables, pinned at both ends and anchored to the centerline, using either vertical or Nielsen-type hanger arrangements. When properly designed, this layout can significantly reduce forces and deflections under loads that are symmetrical with respect to the plane of the arch. However, it does not contribute to the support of nonsymmetrical loads, such as eccentric loads distributions or wind loading, and does not reduce the sensibility of the arch to out-of-plane buckling. Thus, this paper studies how a cable arrangement composed of two sets of lateral hangers, attached to both edges of a deck, can be very suitable to address these problems. Firstly, it is demonstrated that the structural behavior under symmetrical loads improves with respect to the bridge with centered hangers. Secondly, it is shown how nonsymmetric loads are partially carried by structural systems (such as the transversal stiffness both of the arch and the deck) that would remain inactive for tied-arch bridges with centered hangers, leading to a general reduction in the forces and the deflections of the bridge and in the critical buckling load of the arch.

scholarly journals STABILITY OF BUCKLING-RESTRAINED BRACES AFFECTED BY THE OUT-OF-PLANE STIFFNESS OF THE JOINT ELEMENT

2004 ◽  
Vol 69 (575) ◽  
pp. 121-128 ◽  
Author(s):  
Toru TAKEUCHI ◽  
Satoshi YAMADA ◽  
Madoka KITAGAWA ◽  
Kazuaki SUZUKI ◽  
Akira WADA
Keyword(s):  
Buckling Restrained Braces ◽  
Out Of Plane ◽  
Joint Element

The Study on the Effect of the Lateral Braces on the out-of-Plane Stability of Web Openings Circular Steel Arches

2014 ◽  
Vol 501-504 ◽  
pp. 624-627
Author(s):  
Li Yun Jiang ◽  
Ming Li ◽  
Sen Hao Yang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Large Deformation ◽  
Buckling Load ◽  
Elastic Buckling ◽  
Radial Load ◽  
Buckling Mode ◽  
Web Openings ◽  
Research Results ◽  
Out Of Plane

The paper adopts large deformation elastic buckling finite element method, researches the out-of-plane stability of lateral braced web openings circular steel arches under the distributed radial load and considers the effects of rise-span ratio, arch foot condition, brace rigidity and brace quantity. Research results demonstrate that the out-of-plane buckling load of web openings circular arches increases with the rise of rise-span ratio and increases with the improvement of arch foot constraint. Buckling half waves increase gradually with the increase of lateral brace stiffness. When brace stiffness reaches the brace critical stiffness, the out-of-plane buckling load of steel arches increases will no longer increase with the rise of the brace stiffness, and the buckling mode of steel arches will transit from out-of-plane instability to in-plane instability. The improvement degree of lateral brace to the bucking load of web openings circular steel arches depends on the lateral brace quantity and the size of the brace intervals.

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