Download PDF, EPUB, MOBI Proceedings of the Engineers' Society of Western Pennsylvania Volume 23
Download PDF, EPUB, MOBI Proceedings of the Engineers' Society of Western Pennsylvania Volume 23
Proceedings of the Engineers' Society of Western Pennsylvania Volume 23.cEngineers' Society Pennsylvania
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Author: Engineers' Society Pennsylvania
Number of Pages: 218 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: Englishhttps://d39ttiideeq0ys.cloudfront.net/assets/images/book/large/9781/1304/9781130465914.jpg
ISBN: 9781130946024
File Name: Proceedings.of.the.Engineers'.Society.of.Western.Pennsylvania.Volume.23.pdf
Download Link: Proceedings of the Engineers' Society of Western Pennsylvania Volume 23
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...by recording for each case the test giving maximum increase. ments were on plate girders and two-thirds on eleven truss spans. A synopsis of the important tests; that is, those giving the maximum percentage of increase for each span, is given in Tables Nos. 8 and 9. The increase of 80 per cent, in the center diagonal of Bridge No. 16, Prof. Turneaure's Experiments, resulted in a total stress of only 900 lbs. per square inch, and is shown in a subsequent paragraph to be of no value as a criterion for designing bridges. Omitting this case, the Robinson and Turneaure experiments on truss spans over 100 ft. indicate: First--That the maximum percentage of increase was much greater when the load on the bridge was composed of cars only, than it was when it consisted of a train headed by an engine. Second--That the percentage of increase bore an intimate relation to the panel length and was decidedly greater for panel lengths approximating onehalf the length of an ordinary freight car or the circumference of an ordinary engine driving wheel, than for other lengths. Third--That the length of the span had no influence on the percentage of increase. The ratios of vibration are not given in the tables, but they are given in the papers referred to, which papers clearly show that the maximum percentages of increase occur, from accumulative vibration, when the rate of the dynamic impulses harmonizes with the rate of vibration. The Proceedings of the 6th annual convention of the American Railway Engineering and Maintenance of Way Association contain a report of the committee on Iron and Steel Structures, one portion of which is in regard to Impact and refers to some two thousand tests made on various members of different bridges. As stated in the report, all data in connec...
Read online Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 Buy Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 Download Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent
Proceedings of the Engineers' Society of Western Pennsylvania Volume 23.cEngineers' Society Pennsylvania
Author: Engineers' Society Pennsylvania
Number of Pages: 218 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: Englishhttps://d39ttiideeq0ys.cloudfront.net/assets/images/book/large/9781/1304/9781130465914.jpg
ISBN: 9781130946024
File Name: Proceedings.of.the.Engineers'.Society.of.Western.Pennsylvania.Volume.23.pdf
Download Link: Proceedings of the Engineers' Society of Western Pennsylvania Volume 23
---------------------------------------------------------------
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...by recording for each case the test giving maximum increase. ments were on plate girders and two-thirds on eleven truss spans. A synopsis of the important tests; that is, those giving the maximum percentage of increase for each span, is given in Tables Nos. 8 and 9. The increase of 80 per cent, in the center diagonal of Bridge No. 16, Prof. Turneaure's Experiments, resulted in a total stress of only 900 lbs. per square inch, and is shown in a subsequent paragraph to be of no value as a criterion for designing bridges. Omitting this case, the Robinson and Turneaure experiments on truss spans over 100 ft. indicate: First--That the maximum percentage of increase was much greater when the load on the bridge was composed of cars only, than it was when it consisted of a train headed by an engine. Second--That the percentage of increase bore an intimate relation to the panel length and was decidedly greater for panel lengths approximating onehalf the length of an ordinary freight car or the circumference of an ordinary engine driving wheel, than for other lengths. Third--That the length of the span had no influence on the percentage of increase. The ratios of vibration are not given in the tables, but they are given in the papers referred to, which papers clearly show that the maximum percentages of increase occur, from accumulative vibration, when the rate of the dynamic impulses harmonizes with the rate of vibration. The Proceedings of the 6th annual convention of the American Railway Engineering and Maintenance of Way Association contain a report of the committee on Iron and Steel Structures, one portion of which is in regard to Impact and refers to some two thousand tests made on various members of different bridges. As stated in the report, all data in connec...
Read online Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 Buy Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 Download Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 for pc, mac, kindle, readers Download to iPad/iPhone/iOS, B&N nook Proceedings of the Engineers' Society of Western Pennsylvania Volume 23 ebook, pdf, djvu, epub, mobi, fb2, zip, rar, torrent