Shear behavior of steel I-girder with stiffened corrugated web, Part II: Numerical study. (February 2020)

• Record Type: Journal Article
• Authors: He, Jun; Wang, Sihao; Liu, Yuqing; Wang, Dalei; Xin, Haohui
• Is Part Of: Thin-walled structures. Volume 147(2020)
• Publication Date: 2020-02
• Subjects: Composite bridge -- Stiffened corrugated steel web -- Finite element analysis -- Parametric studies -- Shear capacity -- Analytical models evaluation; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2019.02.023
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: For long-span composite bridges with corrugated steel webs, the encased concrete near the intermediate support section increases the weight of the girder, reduces pre-stressing efficiency, and causes difficulties in the construction process. The authors in the companion paper [1] proposed a corrugated steel web with vertical or/and horizontal stiffeners to replace or shorten the length of concrete encasement. In parallel with experimental study described in the companion paper, this paper further investigates the shear performance of proposed stiffened corrugated steel webs by numerical and analytical methods. Firstly, finite element (FE) models considering material nonlinearity, welding residual stress, and geometric imperfection were established and validated against the experimental results. Then the effects of web thickness, corrugation depth, height and thickness of stiffeners on shear strength and failure modes were analyzed based on the validated FE models. Finally, both experimental and numerical shear strength were used to evaluate the applicability of existing calculation methods proposed by different scholars to predict the shear capacity of stiffened corrugated steel web. The comparisons reveal that calculation methods proposed by Hassanein & Kharoob [2] and Leblouba et al. [3] predict the shear capacity of pure corrugated steel web more accurately, and all existing calculation methods underestimate corrugated steel web with vertical stiffeners. Therefore, the analytical model for accurately predicting shear strength of stiffened corrugated steel web need to be developed, which will be investigated in subsequent studies. Highlights: A new type of corrugated steel web with vertical or/and lateral stiffeners is proposed. Shear behavior of steel I-girder with stiffened corrugated webs has been numerically investigated. Non-linear finite element models considering residual stress and geometric imperfection were established and validated. Applicability of current shear capacity calculation method for stiffened corrugated steel webs was evaluated.