Abstract
The paper presents a numerical analysis of corrugated steel plate (CSP) bridge with reinforced concrete (RC) relieving slab under static loads. Calculations were made based on the finite element method using Abaqus software. Two computation models were used; in the first one, RC slab was used, and the other was without it. The effect of RC slab to deformations of CSP shell was determined. Comparing the computational results from two numerical models, it can be concluded that when the relieving slab is applied, substantial reductions in displacements, stresses, bending moments and axial thrusts are achieved. Relative reductions of displacements were in the range of 53–66%, and stresses of 73–82%. Maximum displacements and bending moments were obtained at the shell crown, and maximum stresses and axial thrusts at the quarter points. The calculation results were also compared to the values from experimental tests. The course of computed displacements and stresses is similar to those obtained from experimental tests, although the absolute values were generally higher than the measured ones. Results of numerical analyses can be useful for bridge engineering, with particular regard to bridges and culverts made from corrugated steel plates for the range of necessity of using additional relieving elements.
Highlights
Bridges and culverts made of corrugated steel plates (CSP) are more often used as an alternative structure to traditional steel or concrete bridges (Beben 2005; El-Taher 2009; Janusz, Madaj 2009)
As a result of numerical computations of the CSP bridge obtained from two models and comparing the obtained results with the experimental values, following conclusions can be drawn: 1. It is clearly indicated that there are beneficial effects of the reinforced concrete (RC) relieving slab on reducing displacements and stresses, as well as on bending moments and axial thrusts in the CSP bridge
In the model with the slab, maximum displacements occur at the shell crown and maximum stresses at quarter points
Summary
Bridges and culverts made of corrugated steel plates (CSP) are more often used as an alternative structure to traditional steel or concrete bridges (Beben 2005; El-Taher 2009; Janusz, Madaj 2009). It is impossible to apply the minimum height of soil cover in the crown for such CSP bridge structures (AASHTO 2010; Abdel-Sayed, Salib 2002; CHBDC 2006; Pettersson, Sundquist 2007; Rowinska et al 2004). The result can lead to reduction of internal forces in the steel shell For this purpose, reinforced concrete (RC) slabs, geosynthetics and reinforced soil are usually employed (Bathurst, Knight 1998; Beben, Manko 2008; Essery, Williams 2007; Janusz, Madaj 2009; Vaslestad et al 2002). One of the first analyses concerning determination of the effect of RC relieving slab on deformations of CSP shell was performed by Duncan et al (2010) The authors performed a two-dimensional analysis using the finite element method (FEM). Final conclusions relate primarily to the advisability of using RC relieving slab, and to the accuracy of the obtained results compared to the results from experimental tests
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