Shear Lag in Box Girder Bridges

Luo, Qi; Li, Qiusheng; Tang, Junqi

doi:10.1061/(asce)1084-0702(2002)7:5(308)

Cited by 66 publications

(26 citation statements)

References 13 publications

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“…These two calculative regularities are both in accordance with those illustrated in Refs. [11,12], which also proves that analytical procedure of indeterminate box employed by PWLIND is authentic and reliable.…”

Section: Development Of the Procedures And Analysis Of The Examplesmentioning

confidence: 67%

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Powell dynamic identification of displacement parameters of indeterminate thin-walled curve box based on FCSE theory

2011

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The FCSE controlling equation of pinned thinwalled curve box was derived and the indeterminate problem of continuous thin-walled curve box with diaphragm was solved based on flexibility theory. With Bayesian statistical theory, dynamic Bayesian error function of displacement parameters of indeterminate curve box was founded. The corresponding formulas of dynamic Bayesian expectation and variance were deduced. Combined with one-dimensional Fibonacci automatic search scheme of optimal step size, the Powell optimization theory was utilized to research the stochastic identification of displacement parameters of indeterminate thin-walled curve box. Then the identification steps were presented in detail and the corresponding calculation procedure was compiled. Through some classic examples, it is obtained that stochastic performances of systematic parameters and systematic responses are simultaneously deliberated in dynamic Bayesian error function. The one-dimensional optimization problem of the optimal step size is solved by adopting Fibonacci search method. And the Powell identification of displacement parameters of indeterminate thin-walled curve box has satisfied numerical stability and convergence, which demonstrates that the presented method and the compiled procedure are correct and reliable.During parameters' iterative processes, the Powell theory is irrelevant with the calculation of finite curve strip element (FCSE) partial differentiation, which proves high computation efficiency of the studied method.

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Section: Development Of the Procedures And Analysis Of The Examplesmentioning

confidence: 67%

“…Combined with the theory of orthogonal function series, the finite strip method is established to study the performances of the single-cell and multi-cell curve box girders in Refs. [11][12][13]. Before the structural analysis of thin-walled curve box, the necessary displacement parameters must be input.…”

Section: Introductionmentioning

confidence: 99%

Powell dynamic identification of displacement parameters of indeterminate thin-walled curve box based on FCSE theory

2011

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“…The finite curve strip element (FCSE) method presented in Ref. [12] is applied to the mechanical analysis of the thin-walled curve box in this paper. For this kind of box structures, the Novozhilov theory uses different kinds of ϕ (see Fig.…”

Section: Finite Curve Strip Element Methods Of Thin-walled Curve Boxmentioning

confidence: 99%

Powell’s optimal identification of material constants of thin-walled box girders based on Fibonacci series search method

Zhang

Jian-shu

Zhou

2011

Appl. Math. Mech.-Engl. Ed.

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A dynamic Bayesian error function of material constants of the structure is developed for thin-walled curve box girders. Combined with the automatic search scheme with an optimal step length for the one-dimensional Fibonacci series, Powell's optimization theory is used to perform the stochastic identification of material constants of the thin-walled curve box. Then, the steps in the parameter identification are presented. Powell's identification procedure for material constants of the thin-walled curve box is compiled, in which the mechanical analysis of the thin-walled curve box is completed based on the finite curve strip element (FCSE) method. Some classical examples show that Powell's identification is numerically stable and convergent, indicating that the present method and the compiled procedure are correct and reliable. During the parameter iterative processes, Powell's theory is irrelevant with the calculation of the FCSE partial differentiation, which proves the high computation efficiency of the studied methods. The stochastic performances of the system parameters and responses are simultaneously considered in the dynamic Bayesian error function. The one-dimensional optimization problem of the optimal step length is solved by adopting the Fibonacci series search method without the need of determining the region, in which the optimized step length lies.

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“…Several researchers studied the shear lag effect on the longitudinal membrane force along the span [13,14]. However, to the best knowledge of the authors, no research work has been conducted for investigating the shear lag effect on the transverse membrane force and membrane shear force along the span.…”

Section: Shear Lag Effect Along the Spanmentioning

confidence: 99%