Bridge Superstructure Tolerance to Total and Differential Foundation Movements (2018) / Chapter Skim
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NCHRP Project 12-103 202 7 Spot Checking of Secondary Bridge Types (Task 2.4) As an extension of the primary study discussed in Sections 5 and 6, a secondary group of structures were evaluated (or "spot checked")
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NCHRP Project 12-103 203 7.1 Approach to Modeling, Simulation, and Evaluation of Secondary Bridges All of the models were built manually because the construction of these models differs from the multigirder models used for steel and PS. As detailed in the Phase I report, full shell models were used instead of a beam/shell composition (element-level model)
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NCHRP Project 12-103 204 in the webs. The total cross-section moment was calculated as the sum of the total moment in the flanges and the total moment in the web.
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NCHRP Project 12-103 205 7.2 Closed and Open Steel Boxes Steel box girders provide several advantages over I-section girders. These advantages include span range, torsional resistance, and stiffness among others.
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NCHRP Project 12-103 206 Table 7-2 - Design summaries for Open Steel bridges. Open Steel 1 Open Steel 2 Open Steel 3 No.
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NCHRP Project 12-103 207 Table 7-4 - Tolerable TD support movement occurring at the abutment. Strength I Flexure Strength I Shear Service II Closed Steel 1 > 30 7.0 in.
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NCHRP Project 12-103 208 Strength I Flexure and Service II limit state, thus the observations made for multi-girder bridges may also apply. For the Strength I Shear limit state, more refined evaluation may be required.
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NCHRP Project 12-103 209 Table 7-7 - Design summaries for CIP Multi-Cell bridges.
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