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- W588269564 abstract "Bridge engineers are concerned about the response of precast concrete (PC) girder bridges, which are hit by over-height-vehicle loads. The role of intermediate diaphragms in providing impact damage protection to the PC girders is not clearly defined. An analytical study was conducted to assess the effectiveness of intermediate diaphragms in reducing the damage to the girders of a PC girder bridge that is struck by an over-height object on a highway vehicle. Also, the study investigated whether a structural steel, intermediate diaphragm would essentially provide the same degree of impact protection to the PC girders as that provided by a reinforced concrete (RC), intermediate diaphragm. Finite-element models were developed for non-skewed and skewed, PC girder bridges. Each model was analyzed with one RC and two types of steel intermediate diaphragms that were located at the mid-span of an interior span of the bridge. The bridge models were analyzed for a lateral-impact load that was applied to the bottom flange of the exterior girders at the intermediate diaphragm location and away from the diaphragm location. The induced strains and displacements in the girders were established for each intermediate diaphragm case. When a lateral-impact load was applied at the diaphragm location, the RC, intermediate diaphragm provided more protection for the girders than that provided by the two types of structural steel, intermediate diaphragms. The three types of intermediate diaphragms provided essentially the same degree of impact protection for the PC girders when the load was applied away from the diaphragm location. For the covering abstract see ITRD E122906." @default.
- W588269564 created "2016-06-24" @default.
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- W588269564 date "2003-01-01" @default.
- W588269564 modified "2023-09-22" @default.
- W588269564 title "EFFECTIVENESS OF INTERMEDIATE DIAPHRAGMS IN PC GIRDER BRIDGES SUBJECTED TO IMPACT LOADS" @default.
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