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bridges their engineering and planning pdf

Our ability to write this book has also depended on advice and assistance from friends, students, colleagues, and bridge-engineering professionals. Mr. Srikanth Akula did extensive analysis for us on American bridges (chapter 2), and later so did Mr. Sanket T. Dhatkar, who brought the analysis
up to date. This effort was quite necessary because of the National Bridge Inventory’s great complexity. We are obligated to Mr. Jerome O’Connor for his insistence that we redouble our efforts to make sure we had interpreted the inventory well, for his careful review of our chapter on bridge delivery, and for his suggestions for photographs.

For information on the bridge delivery process (chapter 10), we are indebted to Bruce V. Johnson, P.E., Oregon state bridge engineer, for his detailed knowledge, presented in an excellent slide presentation. For information on New York State highway development, we consulted the relevant environmental impact statements and received advice from Frank Billitier, P.E., and Norman Duennebacke, P.E. We are thankful to them for their help.

Ms. Nasi Zhang helped us analyze and provide technically correct illustration of stresses and strains in a typical bridge under applied forces, helping bring chapters 5 and 6 to their present state, in which we strive for them to be accessible while remaining technically respectable. For chapter 9,
to illustrate how planners analyze auto traffic for decisions about needs for a bridge, we hypothesized a simple place called Square City. The software with which we analyze Square City is known as “DynusT.” We are grateful to Mr. Jinge Hu and Professor Qian Wang for developing the Square City model and running it for us. For the preparation of a bridge map appearing
in chapter 8, we also thank Mr. Chao Huang and Ms. Paria Negahdarikia. Mr. Chao Huang also assisted us ably in organizing our many illustrations for publication.

Early in our work, we consulted with Professor Alex Bitterman, who gave us valuable ideas for our work in general and for future illustrations. We were eventually joined by Mr. David C. Pierro, our illustrator, whose fine contributions are apparent throughout the book. Ms. Jane Stoyle Welch
helped us greatly by insisting that we keep to a schedule and coordinate revision and illustrations. We want to conclude by expressing our thanks to University at Buffalo faculty members who gave of their time to advise us on the project.

They include Brian Carter of the Department of Architecture; Himanshu Grover, Daniel Hess, and JiYoung Park of the Department of Urban and Regional Planning, and Niraj Verma, who has moved on from our university to head public policy studies at Virginia Commonwealth University. We would also like to express our appreciation to Myint Lwin and Phillip W. H. Yen for their detailed and useful manuscript comments. We now look forward to hearing from readers on whether they have been inspired to learn more about, and pay special attention
to, bridges in the environment.