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Pages 241-243

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From page 241...
... 241   Summary and Conclusions In this project, physical testing and analytical modeling were performed in order to develop modified design methodologies for concrete deck overhangs supporting concrete barriers as well as open concrete deck-mounted steel and curb-mounted steel railings. For each system type, physical testing was performed, LS-DYNA models were calibrated using physical test data, and numerous models were created to investigate the effects of design variations on load distributions and overhang capacity.
From page 242...
... 242 MASH Railing Load Requirements for Bridge Deck Overhang level's design lateral impact loads were shown to be able to resist dynamic loads associated with higher test levels due to their inertial resistance. To quantify this effect and eventually directly account for it in official design methodologies, research is recommended to subject concrete barrier and open concrete railings to static and dynamic load tests in which the load rate is the only variable.
From page 243...
... Summary and Conclusions 243   also believed that the edge-stiffening effect of curbs may reduce wheel load demands in the overhang. Research is recommended to refine the analysis methods for overhangs under the strength limit state, as overhangs that are not designed using the 1 k/ft load assumption often require large steel quantities.

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