Design of Roadside Barrier Systems Placed on MSE Retaining Walls (2010) / Chapter Skim
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Pages 38-49
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38 A series of pullout tests were performed to evaluate the influence of rate effect on the pullout capacity of the reinforcement. Ten tests were conducted: seven on steel reinforcement strips and three on steel bar mats.
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39 Figure 4.1. Grain size distribution of the sand used in the pullout experiments.
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40 Figure 4.2. Compaction curve for the sand tested.
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4.6 Procedure (Soil Installation, Rate of Loading, Testing) A pullout test box was used in the tests.
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42 (a) Pullout box setup (b)
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43 (a) Grabbing the bar mat (b)
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44 Tie Back Strip, Unsaturated, 0.00097 in/s estimated displacement from ruler 0 200 400 600 800 1000 1200 0 1 2 3 4 5 6 Displacement (in)
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45 Tie Back Strip, Saturated, 0.0016 in/s estimated displacement from ruler 0 100 200 300 400 500 600 700 800 0 1 2 3 4 5 6 Displacement (in)
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46 Tie Back Strip, Saturated, 3.84 in/s 0 200 400 600 800 1000 1200 1400 1600 0 0.2 0.4 0.6 0.8 1 1. .4 Displacement (in)
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47 Bar Mat, Unsaturated, 0.00168 in/s estimated displacement from ruler 0 500 1000 1500 2000 2500 3000 3500 4000 0 0.5 1 1.5 2 2.5 3 3.5 Displacement (in)
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48 a) Tie Back Stripa, Unsaturated Test Condition Pullout Speed Dry Density of Sand Normal Load Specimen Width Length of Embedment Pullout Force Elapsed Time at Peak Displacement at Peak Pullout Resistanceb (in./s)
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49 100 1000 10000 0.01 0.1 1 10 100 1000 10000 Tie Back Strip, Unsaturated Tie Back Strip, Saturated Bar mat, Unsaturated Time (sec, log) Pu llou t F or ce (lb f, l og )
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