Design Guidelines for Test Level 3 through Test Level 5 Roadside Barrier Systems Placed on Mechanically Stabilized Earth Retaining Walls (2022) / Chapter Skim
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226 8 STATIC LOAD TEST ON TL-5 BARRIER-MOMENT SLAB SYSTEM Upon completion of the full-scale TL-5 crash test, a static load test was conducted on a section of the BMS system (section B5-B6) on top of the MSE wall test installation.
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227 Table 8-1. The analytical solution shows that the sliding and overturning resistance of the system are similar in magnitude when the soil resistance is considered.
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228 Table 8-1 Results of the analytical solution of the TL-5 test BMS system Test Level W (kips) Moment Arms around Rotation Point B Sliding Analyses Overturning Analyses Rotation Point B TL-5-1 128.6 lB (in)
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229 a) Longitudinal distribution of the quasi-static load b)
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230 Figure 8-2 Results of the quasi-static FE analyses in the test barrier-foundation system. 8.3 Full-Scale Static Load Test The purpose of the static load test was to verify the magnitude of the static load applied to the barrier required to initiate movement of the BMS system.
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231 Figure 8-3 Details of the full-scale static test set-up on the barrier-foundation system. 45° 1' Clean sand material Road base material Existing Deck 2'-10" Steel rod (Ø 1.75")
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232 Figure 8-3 Details of the full-scale static test set-up on the barrier-foundation system (Continued)
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233 a) Side view of the static test set-up b)
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234 Figure 8-5 Crack in the soil during the static load test The steps of the static test were as follows: a) The system was loaded up to 100 kips (445 kN)
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235 a) Load and re-load displacement curve b)
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236 load reaches a magnitude of 75 kips (333.8 kN) , which is associated with the static capacity of the system to overturning discounting the shear resistance of the soil.
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237 Figure 8-8 Time history load of the strip during the static test. Figure 8-9 Sketch of movement of the barrier system during the static test.
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238 Figure 8-10 Relative movement at the bottom of barrier segment 6 and 7 during the during the static test. Upon completion of the static test, a visual inspection of the underlying MSE wall was conducted.
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239 Figure 8-11 Relative panel movement observed during the static load test. 8.4 Comparison of Test and Simulation Figure 8-12 shows the load test results compared to the numerical simulation.
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240 of the cohesion intercept estimated from the triaxial test. As explained previously, the friction component might not be attributable entirely to the soil.
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