کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
267868 504417 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of a reasonable impact factor for fatigue investigation of simple steel plate girder railway bridges
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Determination of a reasonable impact factor for fatigue investigation of simple steel plate girder railway bridges
چکیده انگلیسی

In Korea, there are approximately 1000 ballastless steel plate girder railway bridges that are short span and simply supported and have been in service for over 30 years. It is well known that one of the main factors affecting the durability of such bridges is the fatigue phenomenon. This study aimed to determine a reasonable impact factor for fatigue investigation of these bridges. The impact factor was obtained from a dynamic analysis modeling a bridge and a train as beam and moving masses, respectively. Train speed and the type, span length and stiffness of the bridge were considered as the main variables in the analysis. The validity of the presented impact factor was confirmed through comparison with measured values. The results of this work show that the present Korean code has a tendency to overestimate the fatigue impact factor, and a value only half of that used in ordinary static design can be used for fatigue investigation of simple steel plate girder railway bridges.


► This study investigated a reasonable fatigue impact factor of steel railway bridges.
► The impact factor was newly defined using the maximum dynamic stress range.
► The results show that the present code has a tendency to overestimate it.
► Hence, a value only half of that used in ordinary static design can be used for it.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Structures - Volume 36, March 2012, Pages 316–324
نویسندگان
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