scholarly journals Elasto-plastic out-of-plane buckling strength of through type and half-through type arch bridges.

1989 ◽  
pp. 137-148
Author(s):  
Tatsuro SAKIMOTO ◽  
Tsutomu SAKATA ◽  
Eiichi TSURUTA
Keyword(s):  
Buckling Strength ◽  
Out Of Plane ◽  
Arch Bridges

scholarly journals Locally Corroded Stiffener Effect on Shear Buckling Behaviors of Web Panel in the Plate Girder

2015 ◽  
Vol 2015 ◽  
pp. 1-19 ◽  
Author(s):  
Jungwon Huh ◽  
In-Tae Kim ◽  
Jin-Hee Ahn
Keyword(s):  
Corrosion Damage ◽  
Element Analysis ◽  
Buckling Strength ◽  
Lower Shear ◽  
Out Of Plane ◽  
Shear Buckling ◽  
Buckling Failure ◽  
Plane Displacement ◽  
The Web ◽  
Plate Girder

The shear buckling failure and strength of a web panel stiffened by stiffeners with corrosion damage were examined according to the degree of corrosion of the stiffeners, using the finite element analysis method. For this purpose, a plate girder with a four-panel web girder stiffened by vertical and longitudinal stiffeners was selected, and its deformable behaviors and the principal stress distribution of the web panel at the shear buckling strength of the web were compared after their post-shear buckling behaviors, as well as their out-of-plane displacement, to evaluate the effect of the stiffener in the web panel on the shear buckling failure. Their critical shear buckling load and shear buckling strength were also examined. The FE analyses showed that their typical shear buckling failures were affected by the structural relationship between the web panel and each stiffener in the plate girder, to resist shear buckling of the web panel. Their critical shear buckling loads decreased from 82% to 59%, and their shear buckling strength decreased from 88% to 76%, due to the effect of corrosion of the stiffeners on their shear buckling behavior. Thus, especially in cases with over 40% corrosion damage of the vertical stiffener, they can have lower shear buckling strength than their design level.

Stiffened Hangers: an Often Overlooked Tool for Conceptual Design of Tied-Arch Footbridges

2021 ◽  
Author(s):  
Juan José Jorquera-Lucerga ◽  
Juan Manuel GARCÍA-GUERRERO
Keyword(s):  
Low Cost ◽  
Three Dimensional ◽  
Structural Response ◽  
Bending Moments ◽  
Structural Element ◽  
Axial Forces ◽  
Limited Effectiveness ◽  
Out Of Plane ◽  
Arch Bridges ◽  
Fixed End

<p>In tied-arch bridges, the way the arch and the deck are connected may become crucial. The deck is usually suspended from hangers made out of steel pinned cables capable of resisting axial forces only. However, a proper structural response, (both in-plane and out-of-plane) may be ensured by fixing and stiffening the hangers in order to resist, additionally, shear forces and bending moments. This paper studies the effect of different pinned and stiffened hanger arrangements on the structural behavior of the tied-arch footbridges, with the intention of providing designers with useful tools at the early steps of design. As a major conclusion, regarding the in-plane behavior, hangers composed of cables (either with vertical, Nielsen-Löhse or network arrangements) are recommended due to its low cost and ease of erection. Alternatively, longitudinally stiffened hangers, fixed at both ends, can be used. Regarding the out-of-plane behavior, and in addition to three-dimensional arrangements of cables, of limited effectiveness, transversally stiffened hangers fixed at both ends are the most efficient arrangement. A configuration almost as efficient can be achieved by locating a hinge at the end corresponding to the most flexible structural element (normally the arch). Its efficiency is further improved if the cross-section tapers from the fixed end to the pinned end.</p>

scholarly journals EFFECT OF OUT-OF-PLANE STIFFNESS AND STRENGTH ON BUCKLING STRENGTH OF HSS BRACE WITH SINGLE-SHEAR BOLTED JOINTS

2018 ◽  
Vol 83 (744) ◽  
pp. 309-319
Author(s):  
Hayato ASADA ◽  
Taichiro OKAZAKI ◽  
Tsuyoshi TANAKA ◽  
Saya NAKAI ◽  
Shogo HASHIOKA
Keyword(s):  
Bolted Joints ◽  
Buckling Strength ◽  
Out Of Plane ◽  
Single Shear

An experimental study on out-of-plane inelastic buckling strength of fixed steel arches

2015 ◽  
Vol 98 ◽  
pp. 118-127 ◽  
Author(s):  
Yan-Lin Guo ◽  
Si-Yuan Zhao ◽  
Yong-Lin Pi ◽  
Mark Andrew Bradford ◽  
Chao Dou
Keyword(s):  
Experimental Study ◽  
Inelastic Buckling ◽  
Buckling Strength ◽  
Out Of Plane

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.

Experimental Investigations on ThermoMechanical Tensioning (TMT), comparison with Heat Sink, and Its Application to a Grillage Structure

2020 ◽  
pp. 1-8
Author(s):  
Amith Gadagi ◽  
Nisith Ranjan Mandal ◽  
Om Prakash Sha ◽  
Sharat Kumar ◽  
Sanyappa Pujari ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Control Mechanism ◽  
Thin Plates ◽  
Experimental Investigations ◽  
Ship Structures ◽  
Buckling Strength ◽  
Distortion Control ◽  
Out Of Plane ◽  
Transverse Welds ◽  
Heat Sinking

Thin plates, which are widely used in ship structures, undergo weld-induced buckling distortions because of their lower critical buckling strength. Thus, there is a need for an active in-process distortion control mechanism in the welding involving thin plates. In this regard, a ThermoMechanical Tensioning (TMT) method was developed and implemented successfully. In the current work, experimental investigation of the effect of TMT pull on the resulting welding distortions is studied and also the TMT process is compared with a heat sinking technique. The experimental results indicate that an increase in the TMT pull would reduce the extent of weld-induced buckling distortions. The results also suggest that a complicated heat sinking technique can be effectively replaced by a TMT process in reducing the welding out-of-plane distortions. The concept of TMT is further extended to the fabrication of grillage structures used in ship structures, which includes longitudinal and transverse welds.

An Investigation into the Earthquake Reaponses of Special-Shaped Arch Bridges

2011 ◽  
Vol 117-119 ◽  
pp. 328-331
Author(s):  
Chang Huan Kou ◽  
Ming Chang Yang ◽  
Shih Wei Ma ◽  
Tsung Ta Wu
Keyword(s):  
Stress Responses ◽  
Response Spectrum ◽  
Element Model ◽  
Geometric Shape ◽  
Arch Bridge ◽  
Out Of Plane ◽  
Internal Forces ◽  
Arch Bridges ◽  
Cable Forces ◽  
Vertical Deformations

By building a finite element model of a special-shaped arch bridge, this paper discusses the effects of the changes of the geometric shape, and the skewed angle of the girder and arch on the dynamic characteristics. In addition, this paper analyzes the longitudinal earthquake responses using the response spectrum method. The results show that when longitudinal earthquakes occur, all geometric shapes, and skewed angles of the girder and arch exhibit different levels of effect on the horizontal and vertical deformations of the girder and the arch, the internal forces of the arch, the girder, and the cables. Among all these parts of the bridge, the arch is affected most by the aforementioned factors. Moreover, because of the unique geometric shape of the special-shaped arch bridge, the distributions of initial and completed cable forces are complex. Therefore, obtaining regular stress responses from the special-shaped arch bridge is difficult regardless of whether the bridge is in-plane or out-of-plane. Hence, the arrangement of cable forces should be specifically considered when building an analytic model of a special-shaped arch bridge.

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