Torsional analysis of thin-walled composite beams with single- and double-celled sections

Kim, Namil; Shin, Dong Ku

doi:10.1016/j.engstruct.2009.02.031

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…The thin-walled box girder adopted in irregularly-shaped bridges usually suffers from the influence of torsion, distortion, warping, and shear lag, which causes a severely uneven stress distribution [6,7]. Many researchers have studied the calculation principles and analysis methods for the thin-walled box girder [8][9][10][11][12]. However, the mechanical property of an irregularly-shaped bridge is different from the conventional straight and curved thin-walled box girder bridge.…”

Section: Introductionmentioning

confidence: 99%

An Optimization Algorithm for the Design of an Irregularly-Shaped Bridge Based on the Orthogonal Test and Analytic Hierarchy Process

Liu

Wang

et al. 2016

Algorithms

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Irregularly-shaped bridges are usually adopted to connect the main bridge and ramps in urban overpasses, which are under significant flexion-torsion coupling effects and in complicated stress states. In irregular-shaped bridge design, the parameters such as ramp radius, bifurcation diaphragm stiffness, box girder height, and supporting condition could affect structural performance in different manners. In this paper, the influence of various parameters on three indices, including maximum stress, the stress variation coefficient, and the fundamental frequency of torsional vibration, is investigated and analyzed based on orthogonal test method. Through orthogonal analysis, the major influence parameters and corresponding optimal values for these indices are achieved. Combining with the analytic hierarchy process (AHP), the hierarchical structure model of the multi-indices orthogonal test is established and a comprehensive weight analysis method is proposed to reflect the parameter influence on overall mechanical properties of an irregularly-shaped bridge. Influence order and optimal values of parameters for overall mechanical properties are determined based on the weight of factors and levels calculated by the comprehensive weight analysis method. The results indicate that the comprehensive weight analysis method is superior to the overall balance method, which verifies the effectiveness and accuracy of the comprehensive weight analysis in the parameter optimization of the multi-indices orthogonal test for an irregularly-shaped bridge. Optimal parameters obtained in this paper can provide reference and guidance for parameter control in irregularly-shaped bridge design.

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Section: Introductionmentioning

confidence: 99%

An Optimization Algorithm for the Design of an Irregularly-Shaped Bridge Based on the Orthogonal Test and Analytic Hierarchy Process

Liu

Wang

et al. 2016

Algorithms

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“…Wu et al [5] developed another analytical model for torsional loading without using energy method. Kim and Shin [6] provided exact solutions for twist angle and fibre stresses of thin-walled box beams considering the effects of elastic couplings and restrained warping. Lee and Lee [7], Vo and Lee [8,9] also developed two analytical models for beams under torsional loading based on strain energy method.…”

Section: Introductionmentioning

confidence: 99%

An analytical model for deformation analysis of wind turbine adaptive blades

Zhang

Maheri

Daadbin³

et al. 2012

WIT Transactions on the Built Environment

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An analytical model capable of predicting the induced deformation due to the presence of bend-twist and stretch-twist elastic couplings in multi-cell closed thin walled beams with arbitrary cross-sections is presented. For various structural and material configurations, the results obtained by the developed model are compared with the results of the finite element analysis. It is shown that the developed analytical model provides reasonable accuracy in predicting induced twist. The developed model is implemented in an aero-structure simulation environment for simulation of wind turbines utilising adaptive blades.

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