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Title |
Response Analysis of PSC-I Girder Bridges for Vehicle’s Velocity
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Keywords |
Field loading test ; Impact factor ; PSC-I girder bridge ; Vehicle's velocity ; 현장재하시험 ; 충격계수 ; PSC-I 거더교 ; 차량속도 |
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Abstract |
The response of a bridge can be influenced by span length. bridge's surface condition. vehicle’s weight. and vehicle's velocity. It is difficult to predict accurate behavior of a bridge. In the current standard of specifications. such dynamic effect is defined by impact factor and prescribed to consider live load as to increase design load by means of multiplying this value by live load. However. it is not well understood because the Impact factor method differs from every country. Dynamic, static and pseudo-staitic field loading tests on PSC-I girder bridges were carried out to find out the dynamic property of the bridge. This paper is aimed to figure out actual dynamic property of the bridge by using field loading test. An empirical method based on impact factor is widely used and also argued. Displacement and strain response measured from the tests was compared with one from the empirical method. The former seems to be reasonable since it can consider actual response of a bridge through field tests.
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