Design of Roadside Barrier Systems Placed on MSE Retaining Walls (2010) / Chapter Skim
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Pages 22-37
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22 Pavements are often built on top of MSE walls. The most common scenario is the case of an MSE wall supporting the access embankment for an overpass.
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The static force (Fo) required to generate overturning of the barrier–moment slab assembly is: where l = moment arm of the weight of the system (0.369 m or 1.2 ft)
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responded to the block used in the static load test. The model was initialized to account for gravitational loading on the soil mass before the application of the static load.
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soil began to crack along the edges of the moment slab. The load test was stopped at a load of 40 kN (9 kips)
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27 (a) before test (b)
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(42.5 kips) [Figure 3.11(a)
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displacement–time history obtained from double integration of the acceleration history looked suspect and was thought to be in error. Therefore, high-speed film was used to determine the displacement–time history of the barrier shown in Figure 3.15(b)
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The trace of this force as a function of time was simplified to a triangular shape as shown in Figure 3.20(a)
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and l are known (Figure 3.2) and assumed to be constant in a first analysis.
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mass moment of inertia, one can obtain the angular acceleration (α) by using Equation 3-6.
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the model to improve the accuracy of subsequent predictive simulations used to design additional impact experiments. The system geometry and material properties used for the model were the same as those used in the quasi-static model.
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is a dynamic load and is used in conjunction with an ultimate strength analysis. It is not proper to use the 240 kN (54 kips)
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