signing a Bridge Deck Flyover Assignment PDF
Added on 2021-05-30
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Designing a Bridge Deck Flyover 1Bridge Engineering: Designing a Bridge FlyoverBy(Student’s Name)Course Name:Professor Name:University Name:Date of Submission:
Designing a Bridge Deck Flyover 2ContentsGENERAL DESIGN DESCRIPTION..................................................................................................................3OPTION 1: CONTINUOUS BEAM BRIDGE FLYOVER..................................................................................4OPTION 2: CABLE STAYED FLYOVER BRIDGE SYSTEM..............................................................................4KEY ISSUES...............................................................................................................................................4SCHEME COMPARISON FOR OPTION-1 AND OPTION -2..........................................................................5RECOMMENDATIONS FOR PICKING OPTION 1........................................................................................5CONSTRUCTION METHOD.......................................................................................................................5CONSTRUCTION PROCEDURE..................................................................................................................6ENVIRONMENTAL SUSTAINABLITY..........................................................................................................6COST ESTIMATE.......................................................................................................................................6CALCULATIONS............................................................................................................................................7LOAD PATH ABD OVERALL STABILITY.......................................................................................................7LOAD ANALYSIS.......................................................................................................................................7STEEL ANALYSIS.......................................................................................................................................9ULTIMATE LIMIT STATE IN CABLE..........................................................................................................10Computation of the Design Strength..................................................................................................10Computation of the Design Load.......................................................................................................10SERVICEABILITY LIMIT STATE.................................................................................................................10SHEAR FORCE AND MOMENTS COMPUTATION....................................................................................11BIBLIOGRAPHY...........................................................................................................................................13
Designing a Bridge Deck Flyover 3GENERAL DESIGN DESCRIPTION There is increasing traffic congestion within the Midlands and the problem is imminently reported on a daily due the expansion of the city. This problem has raised an alarm and therefore, there is a proposal which requires that a flyover be constructed to ease the traffic flow at the junction of the majorroad which intersects all the major roads in the town. However, the major concerned is that this flyover should not interrupt the already existing primary roads within the area. Also, it is clear that the only traffic controlling point with the town is the major roundabout within the area. In early 50’s, there were trams along the major roads and they were used to serve the city however; these trams are currently not inuse and serve as central reservations within the city. In fact, the trams now offer an opportunity of building a dual flyover carriage without necessarily adjusting the existing roads (Schacht and Marx, 2015 p.70).Additionally, it is important to take into consideration the fact that the proposed flyover should beeconomical in terms of its elegant and its functionality as well. Obviously, the local environment and the apparent appearance of the town is also a major concerned which need to taken into consideration under the design aspect of this parameter. Some of the elements to be considered in the process include offices, premises, small businesses as well as local shops which are adjacent to the proposed carriage way. Therefore, the efficiency and minimum disruption during the construction is a key priority in the designing and the implementation of this project. This should even include stakeholders and the overall community as a whole (Zhu and Law, 2015 p.1983).OPTION 1: CONTINUOUS BEAM BRIDGE FLYOVER In the construction of a flyover continuous beam bridge can be a type of the design to be used in the construction. This entails having two or even more beams which are jointed on the support edges. Thecontinuous beams are of the two types based on the material science and these two categories include concrete continuous as well as the pre-stressed continuous beams. Moreover, for this flyover constructionthe continuous beams tends to have a number of advantages which ranges from few movements along the
Designing a Bridge Deck Flyover 4joints, smooth deck, good rigidity of the structure, span capability, reduced maintenance cost, resistance to wave and earthquake as well as strong applicability. Taking the span of the flyover to be 80.5m and thewidth of the flyover to be 20m, then this option will ensure that the deformations and rigidity structure arewell organized in the round and have no adverse effects and are economical in the long run. Furthermore,the substructures will be made of the abutments and the piers. On the other hand the superstructure will mainly compose of the continuous beams along with the panels which prove safety parapet and walking surface. Moreover, the road span can be divided into four spans with each span measuring 20m. Moreover, the C50 concrete and motorway can be used in this option to build the continuous bridge. OPTION 2: CABLE STAYED FLYOVER BRIDGE SYSTEMAnother construction method which can be used in this flyover bridge construction is the cable stayed technique. The method is also suitable based on the span of the proposed flyover that is 80m by a width of 20m. Some of the components of the cable stayed technique include cable, tower, pier, deck as well as the superstructure foundation. The choice of the technique will be based on the appearance and the behavior of the structure therefore enhancing the efficiency and increase discontinuity of the structuralbehavior. In the construction, the cable stays will be arranged in accordance with the pure fan system along with the radiating pair of stays. The stays are often referred to as pylon and the contractor have to use two of them at the top. In essence, this pylon will be used to support the vertical deck at the edges of the bridge deck. Additional cable planes can be used to allow for the makeable and invisible anchoring ofthe remaining plate grinders. KEY ISSUES The maintenance cost for the cable bridges is economical, for instance one can easily repair the damaged cables at anytime. In addition, the cable bridges are durable even if the ground conditions are not good. In this aspect, the cable bridge design is the best choice for this but the engineer must recognized the both the deteriorating time as well as the service life time span. Das (1999, p.45), depicts on the two primary maintenance mechanism which can be employed in this design work. The first
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