Design of Reinforced Concrete Bridges
تصميم الكباري (الجسور ) البيتونية المسلحة (الخرسانية)
ملخص تنفيذي
يتكون تقرير المشروع بأكمله من جزأين. يقدم القسم الأول ، الجزء أ ، وصفًا نوعيًا كاملاً لعملية تصميم الجسور الخرسانية النموذجية سابقة الإجهاد. يوفر الجزء الثاني ، الجزء ب ، تصميمًا تفصيليًا كميًا فعليًا لجسر خرساني سابق الإجهاد فيما يتعلق بثلاثة معايير تصميم مختلفة.
Executive Summary
The entire project report consists of two parts. The first section, Part A, presents a complete qualitative description of typical prestressed concrete bridge design process. The second part, Part B, provides an actual quantitative detailed design a prestressed concrete bridge with respect to three different design standards.
In particular, the first part of the report reviews the failure of four different bridges in the past with additional emphasis on the De La Concorde Overpass in Laval, Quebec. Various types of bridges in terms of materials used, cross-section shape and structural type were investigated with their application as well as the advantages and disadvantages. In addition, the predominant differences of the Canadian Highway and Bridge Design Code CSA S6-14 and CSA S6-66, as well as AASHTO LRFD 2014 were discussed. After that, the actual design process of a prestressed concrete bridge was demonstrated, which started with identifying the required design input. Then, several feasible conceptual design options may be proposed by design teams. Moreover, the purpose and significance of structural analysis is discussed in depth, and five different typical analysis software were introduced in this section. Upon the completion of structural analysis, the procedure of detailed structure design and durability design were identified, which included the choice of materials and dimensions of individual specimens as well as the detailed design of any reinforcement profile. Last but not least, the potential construction issues as well as the plant life management and aging management program were discussed and presented at the end of the Part A.
On the other hand, the second part of this report presents a detailed structural design of a prestressed concrete bridge with a span of 25 meters based on three different design standards. It started off with a problem statement that defines the scope of the entire design. The concept of influence line is used to analyze the moving track load, which is then combined with other live loads and dead loads to come up with the entire shear force and bending moment envelope along the bridge. Once all the design loads had been determined, detailed computational designs were performed for both prestressed concrete girders and reinforced concrete decks with respect to three different bridge design standards. Aside from the structural designs, the durability concrete mix design is also provided as part of the bridge design, which takes the environmental conditions into consideration. Finally, the detailed drawings of the bridge are attached at the end of the entire report.
This design report summarized the knowledge and skills that our design team has gained from this course of Capstone Design Project as well as the rest of undergraduate program curriculum. It also provides strong insight on the connections and differences between different design standards, and the impacts these differences could make to the designs. Furthermore, the past failures included in this report has taught us that not only theoretical knowledge, but also the responsibilities of being a future structural engineer. The outlined step-by-step design procedure in this design report may be used for future reference on similar design projects.
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