ME104Q Bridge 1

ME104Q Bridge 1 - Metro Rail Genesee Project ME 104 Q...

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Metro Rail Genesee Project ME 104 Q Professor Perucchio Written By : Daniel Breyre Group Members : J. J. Denntedt Mike Fortier The New York State Department of Transportation has deemed it important and 1
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necessary to construct a new bridge over the Genesee River north of the University of Rochester River Campus. PONS Inc is bidding for the contract rights but must meet the necessary requirements and specifications as mandated by the Department of Transportation; ability to carry both a Metro Rail along with vehicular traffic. This bridge will act as part of a light rail corridor along the Genesee connecting the port of Charlotte with the RIT campus south of downtown. PONS Inc’s proposal to the New York State Department of Transportation is a basic arch bridge with a suspended roadway capable of spanning the width of the Genesee. Mechanically speaking an arch bridge would be most sufficient for the needs of specific area and nature of the project. An arch bridge with a suspended roadway would be able to properly span the distance of the Genesee and allow enough room underneath the bridge for regular boat traffic on the river. (Figure 1) Unlike the conventional beam bridge that currently exists the new arch bridge would not only span the width of the Genesee but would be capable of supporting the weight of both a metro rail and two way vehicular traffic. The ability to carry this increase in weight is extremely important for the functionality of the bridge. The respective distance of the bridge is too short for a suspension bridge as the ideal length for a suspension bridge is 2,000-7,000 ft. A suspension bridge is also very cost ineffective for the relative distance needed to be gaped. A standard beam bridge’s span is ideally 250 ft which means piers must be installed to support its weight as seen on the existing bridge. These piers cause two problems, they restrict water traffic along the Genesee and they are aesthetically unpleasing. The layout of the traffic flow on the bridge will consist of two-way traffic on one side of the bridge and a raised light rail track along the other. Since the span of the 2
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Genesee is not so great a distance the use of a suspension bridge would be overkill. The area could be used most optimally by an arch bridge with a suspended roadway whose distance covered is within the range of 200-800ft. Considering the mechanical aspects of the arch bridge it is clear that in order to ensure the ability of the bridge to sustain the necessary weight, additional support is necessary. This is why suspensions are to be used to additionally stabilize and support the roadway. The suspensions will run above the arc of the bridge and attach to anchors on the sides of abutments at the ends of the bridge. The parallel cables will be on the furthest sides of the bridge as not to interfere with the
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ME104Q Bridge 1 - Metro Rail Genesee Project ME 104 Q...

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