Load Rating of Bridges and Culverts with Missing or Incomplete As-Built Information (2022) / Chapter Skim
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Pages 6-15
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6 This chapter reviews the literature identified as relevant to the question of load rating bridges and culverts with missing or incomplete as-built information. Such information can generally be categorized as having to do with diagnostic or proof load testing, NDT, and other pertinent studies.
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Literature Review 7 tests. Based on the results of the tests, the state updated the H15 load ratings to 1.24 and 1.97, respectively, for the concrete and the steel bridges.
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8 Load Rating of Bridges and Culverts with Missing or Incomplete As-Built Information and high values for the initial prestressing force and the eccentricity for both H20 and HS-20 design loads, based on satisfying code requirements for midspan top and bottom stresses under initial and service load conditions. Using the load test results, ratings were completed for H20 and HS-20 loads under the low and high prestressing force and eccentricity assumptions.
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Literature Review 9 focused on the investigation of a specific bridge in South Carolina. The study included a diagnostic load test of the bridge, laboratory testing to failure of one channel beam, and load rating of the bridge based on the test results.
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10 Load Rating of Bridges and Culverts with Missing or Incomplete As-Built Information determine in situ member conditions (e.g., concrete degradation and spalling, corrosion of internal steel reinforcement)
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Literature Review 11 from compression and hardness tests are more easily obtained because compression tests require relatively smaller bar size, and hardness tests are typically performed in situ. Gearhart reported the steel strength from these tests to be within 5 ksi of the actual strength.
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12 Load Rating of Bridges and Culverts with Missing or Incomplete As-Built Information Other Studies In 2011, Taylor, Amini, and Lindt [51] reported load ratings of 16 Colorado county-owned concrete bridges with missing information -- 14 prestressed girder bridges and two reinforced concrete slab bridges.
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Literature Review 13 Bagheri et al.
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14 Load Rating of Bridges and Culverts with Missing or Incomplete As-Built Information Study Bridge Type Plans Methods Rating Factors Yen and Zhou (1993)
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Literature Review 15 Source Title Contribution Jauregui, Weldon, and Aguilar [22] Load testing of bridges: proof load testing and the future of load testing Outlines a multistep process for load rating prestressed concrete bridges with missing information; includes three examples (double-T beam, box beam, and I-girder bridges)
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