Shear Buckling Resistance of Cantilever Girders With Corrugated Web

Architecture, Civil Engineering, Environment

Kowal

2017

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The study presents the means of increasing resistance of girders with corrugated web by enhancing their shear resistance due to the application of diagonal braces subjected to advantageous tension. Diagonal braces were used in the near-support zones, which increased the shear resistance of the girder. Then, the web carries a greater shear load associated with bending. Experimental investigations on increased shear resistance of girder webs were performed using girders with webs having a height of 500, 1000 and 1500 mm. The shear force divided into the corrugated web and diagonal braces were estimated. Shear load-displacements paths for a corrugated web and diagonal braces were determined. The results of investigations into the resistance of girders reinforced with tension diagonal braces were compared with those for girders without reinforcement and with computations in accordance with Eurocode 3. The paper is the first part of the study. Conclusions were drawn and dimensioning recommendations (part two of the study) for corrugated web girders reinforced with tension diagonal braces were produced. The next part of the study will show the application of FEM numerical analysis to theoretical estimation of the ultimate and critical shear and flexural resistance of corrugated web girders reinforced with tension diagonal braces.

Section: Tests On Girders Reinforced With Tension Diagonal Bracesmentioning

confidence: 63%

“…From studies [2,3,4,8,12], it is known that girders with thin-walled corrugated web have two ultimate resistances, namely shear and flexural ones. Shear resistance in the near-support zone significantly reduces the possibility of utilising the bending resistance of girders.…”

Section: Discussionmentioning

confidence: 99%

Investigations Into The Resistance of Sin Girders Reinforced With Tensioned Diagonal Braces

Architecture, Civil Engineering, Environment

Kowal

2017

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“…Based on FEM analysis, he determined shear buckling stress for the first buckling load P B that causes the web instability in accordance with Eq. (14). Using regression analysis, Eldib devised Eq.…”

Section: Design Shear Buckling Resistance Of Corrugated Web Girdersmentioning

confidence: 99%

“…In the formula derived by Eldib [13], the debatable issue is the fact the design shear buckling resistance considerably exceeds shear yield strength τ y , which was not confirmed by experimental investigations [12,14,15].…”

Section: Design Shear Buckling Resistance Of Corrugated Web Girdersmentioning

confidence: 99%

“…The papers by the author of this study [14,15,16] reported observations that design shear buckling resistance in sine wave corrugated webs given in the standard [1] is overestimated. Additionally, investigations indicated that in girders with sinusoidal web profile, an interaction occurs between local and global mode of shear instability, which reduces buckling resistance of girders.…”

Section: Introductionmentioning

confidence: 99%

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Shear Buckling of Plate Girders with Corrugated Web Restrained by End Stiffeners

Period. Polytech. Civil Eng.

2018

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The study reports the investigations into the effect produced by flexural stiffness of end stiffeners on the design buckling resistance of the sine wave webs of girders. Experimental investigations were concerned with load displacement paths in sinusoidally corrugated web girders, composed of structural items and made to the full scale . The phenomena occurring in experimental investigations were represented using the Finite Element Method. In numerical models based on FEM analysis, the same failure modes of webs that were found in experimental investigations into corrugated web girders were accounted for. FEM numerical analysis was performed for girder models with webs 500, 1000, 1250 and 1500 mm in height, made of corrugated sheet metal 2, 2.5 and 3 mm in thickness. On the basis of laboratory tests and FEM analysis, a new method for estimating design shear buckling resistance for girders with semirigid and rigid end stiffeners was proposed. The method relies on the determination of interactive buckling resistance. The solution presented in this study was compared with formulas currently used for buckling resistance estimation. It was shown that the use of girder rigid end stiffeners produces in increase in shear buckling resistance up to 11%. Conclusions were drawn and recommendations were made with respect to the sizing of sine wave corrugated web girders with semirigid and rigid end stiffeners.

Fem Analysis Of Corrugated Web Girders Reinforced With Tensioned Diagonal Braces

Architecture, Civil Engineering, Environment

Kowal

2017

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The study presents the application of FEM numerical analysis, performed with the Abaqus software [1], for theoretical estimation of the ultimate and critical shear and flexural resistance of corrugated web girders reinforced with tension diagonal braces. In FEM numerical models, different web failure modes, observed in physical experimental research into SIN girders were taken into consideration [2]. That was done depending on the inclination angle β of tension diagonal braces and the web thickness. FEM analysis of the shear resistance of corrugated web girders was performed using numerical models of girders. The webs, made from corrugated sheet, had the heights of 500, 1000 and 1500 mm, and the thicknesses of 2; 2.5 and 3 mm. Global shear and flexural load-displacement paths (LDPs) were determined for girder numerical models. In shear LDPs, the shares of cooperation between the corrugated web and tension diagonal braces were separated. For each numerical model, the estimates of the share of the corrugated web and diagonal braces in the shear resistance of SIN girders were produced. The results of the FEM numerical analysis of the resistance of corrugated web girders reinforced with tension diagonal braces were compared to the results of physical experimental research [2] into the girders of concern, and also with the results of calculations made for unreinforced girders acc. EC3 [19]. Conclusions were drawn and recommendations were produced, which can be applied to the construction and dimensioning of corrugated web girders reinforced with tension diagonal braces. The Abaqus software was adjusted to solve the problems related to the phenomena revealed by the research [2].