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Comparison of bridge load rating based on analytical and field testing methods

机译：基于分析和现场测试方法的桥梁额定载荷的比较

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Abstract: Unit H4 of the ACOSTA bridge in Jacksonville, Florida is composed of steel with a composite concrete deck. The bridge, designed for AASHTO HS20 loading, was built in 1993 on a horizontal curve. However it was later discovered that the designer neglected to consider the effect of curvature in the original design. Considering the effect of curvature in the analytical load rating resulted in load rating of HS4. To resolve the concerns about the low load rating of this essentially new bridge and to establish the actual load capacity, field load testing was conducted in 1996. Critical sections along the span were instrumented with strain and deflection gauges. The bridge was incrementally loaded and all measurements were recorded at each load step. The results were used to study the behavior of the bridge. The field test results combined with analysis resulted in a higher load rating than the original analytical rating considering curvature effect.!4
机译：摘要：佛罗里达州杰克逊维尔市ACOSTA桥的H4单元由钢制成，带有复合混凝土甲板。该桥专为AASHTO HS20装载而设计，于1993年在水平曲线上建造。但是，后来发现设计师忽略了原始设计中的曲率影响。考虑曲率对分析额定载荷的影响，得出了HS4的额定载荷。为了解决对这座本质上是新桥的低额定载荷的担忧并建立实际的载荷能力，1996年进行了现场载荷测试。沿跨度的关键部分安装了应变仪和挠度仪。桥被增量加载，并在每个加载步骤记录所有测量结果。结果用于研究桥梁的行为。考虑到曲率效应，现场测试结果与分析相结合得出的额定载荷要高于原始分析额定值！！ 4

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