Some Contributions to New Ideas and Design Concepts in the Design of Bridges

Abstract

In the design of bridges as well as that of any other type of structure the solution of a problem is implicit. For any such problem there are, on the one hand, specific conditions which must be fulfilled and, on the other, an infinite number of possible solutions. The search for the optimal solution, generally, is not the result of sudden inspiration but the result of a slow approximation to the problem, in order to attain a detailed understanding of the same, and of the rigorous, conscientious and deep consideration of all the available possibilities, including the more creative, unedited and innovative ones. In this process, the deep knowledge, the previous experience and the personal talent are crucial with respect to the final result. This process, which can hardly be explained in words, is what is known as conceptual design. It is part of the trade qualities which a good structural engineer should have. It requires not only a solid education and the capacity to have broad view of things at University level, but also, the learning provided by professional practice, directed by good teachers and a humble and self-sacrificing attitude. Creating a new idea, daring to give liberty to imagination requires a first experience of true creation. With the above conditions, creation will come naturally when confronting each problem. It is necessary to practice this methodology with each new project, independently of its size, its importance or its impact. What is important is to make a great project out of every engineering problem to be solved. Any project, be it, ever so modest, gives opportunity to produce good and creative engineering. In this paper these ideas are discussed, analysing the process through the experience of developing a number of specific projects. Introduction Arch Bridges Composite Truss Bridges Suspension Bridges Final Considerations Acknowledgments References