Equivalent computational models and deflection calculation methods of box girders with corrugated steel webs

Abstract

This study found that it is improper to use equivalent concrete webs (ECWs) to replace corrugated steel webs (CSWs) in the MIDAS Civil. To reflect the mechanical performance difference of CSWs in different directions, a more precise theoretical model, the assimilated orthotropic plate (AOP), is presented to simulate CSWs. 3D Finite element analysis demonstrates that the AOP model can yield a more precise description of CSWs compared with the ECW model in MIDAS. In addition, this paper presents a unified calculation method for bending deformation suitable for the analysis of beams with equal-area or variable-area cross-sections, in which the non-prismatic beam is made equivalent to the prismatic beam by introducing the concept of equivalent inertia moment. Additionally, the formula of shear deformation in a non-prismatic box girder with CSWs is also derived with Timoshenko beam theory. These derived formulas for non-prismatic box girder with CSWs agree well with the numerical and measured data.

Study on Elastic Global Shear Buckling of Curved Girders with Corrugated Steel Webs: Theoretical Analysis and FE Modelling

“…On the basis of the mathematical model formed by differential Equations (18) and (19) and displacement Equations (21) and (22), the Galerkin method is used based on the principle of virtual displacement, namely, the work done by the generalized force (Equations (18) and (19)) on the generalized virtual displacement (Equations (21) and (22)), respectively, is zero.…”

“…According to the orthogonality principle of a trigonometric function, in terms of Equations (21) and (22) and their derivatives, Equation (26) can be expressed as…”

“…In terms of the orthogonality principle of a trigonometric function, substituting Equations (21) and (22) and their derivatives into Equation (25), the following equation can similarly be given:…”

“…Leblouba et al (2017) experimentally and numerically studied the shear behavior of trapezoidal corrugated webs from the pre-buckling stage until ultimate failure [19]. Based on experimental and theoretical analysis, Zhou et al (2016) first studied the shear stress distribution and shear deformation in non-prismatic beams with CSWs [20][21][22]. On the other hand, Basher et al [23] studied the nonlinear shear strength of curved composite plate girders with CSWs.…”

Experimental Research and Simulation on the Mechanical Performance Degradation of Corroded Stud Shear Connectors

“…In steel-concrete composite beams, the stud connectors are key components which ensure shear transfer with the reinforced concrete slab. ey are often structural failure points [1][2][3]. In the daily operation of an engineered bridge, traffic loads and temperature loads readily cause interface cracks among materials or cracks in the concrete slab.…”