Transactions of the American Society of Civil Engineers volume 20
Transactions of the American Society of Civil Engineers volume 20
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In our eReader you can find the full English version of the book. Read Transactions of the American Society of Civil Engineers volume 20 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Transactions of the American Society of Civil Engineers volume 20
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The third and perhaps most severe causes of increased stress are those which depend upon certain mutual relations between the load and the structure, and foremost of these is the relation between the drive wheel circumference and the panel length of the bridge. Next is the relation between wheel spacing of the train and the panel length; and finally, there is the still more complex relation between panel length, drive wheel circumference or train wheel spacing, velocity of motion of the train, ...and period of vibration of the bridge.
When a tie bar is stated as being loaded to a working stress of 10 000 pounds, engineers understand that the static load is intended. They are aware, perhaps, that the material should bear any number of apialications of a 20 000-pound stress, but dare not approach such a limit simply because they know that unknown stresses are brought about by the above enumerated causes, which would work destruction speedily to a structure nominally calculated for 20 000 pounds; for it is now generally conceded that the nominal 10 000 pounds is more nearly 15 000 to 20 000.
What to read after Transactions of the American Society of Civil Engineers volume 20?
You can find similar books in the "Read Also" column, or choose other free books by American Society of Civil Engineers to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The third and perhaps most severe causes of increased stress are those which depend upon certain mutual relations between the load and the structure, and foremost of these is the relation between the drive wheel circumference and the panel length of the bridge. Next is the relation between wheel spacing of the train and the panel length; and finally, there is the still more complex relation between panel length, drive wheel circumference or train wheel spacing, velocity of motion of the train, ...and period of vibration of the bridge.
When a tie bar is stated as being loaded to a working stress of 10 000 pounds, engineers understand that the static load is intended. They are aware, perhaps, that the material should bear any number of apialications of a 20 000-pound stress, but dare not approach such a limit simply because they know that unknown stresses are brought about by the above enumerated causes, which would work destruction speedily to a structure nominally calculated for 20 000 pounds; for it is now generally conceded that the nominal 10 000 pounds is more nearly 15 000 to 20 000.
What to read after Transactions of the American Society of Civil Engineers volume 20?
You can find similar books in the "Read Also" column, or choose other free books by American Society of Civil Engineers to read onlineMoreLess
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