February 1, 2022 Thesis Open Access

BODENA SIRNA NEGEO

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    <subfield code="a">ASSESSMENT OF POST-FIRE PERFORMANCE OF GFRP STAY IN PLACE FORMWORK FOR CONCRETE BRIDGE DECKS</subfield>
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    <subfield code="a">&lt;p&gt;In highway bridge building, concrete decks are widespread, forming the driving surface and serving as the superstructure of the bridge. Bridge decks are exposed to direct con-tact from traffic, humidity, and chlorides which are liable to corrosion. For this cause, in bridge construction, FRP stay-in-place (SIP) formwork has been suggested. Howev-er, when bridge fire occurs due to the collisions or crushing of the cars and burning of fuels in the proximity of the bridge the behavior of FRP at elevated temperatures is a major concern. Therefore, this study investigated numerically the post-fire performance of concrete bridge decks by simultaneous heating and loading. This sequence of struc-tural loading is employed in three-dimensional (3-D) FEM with the program ABAQUS using a sequentially coupled thermal displacement analysis. The FEM is validated against an experimental test based on the load-deflection, cracking failure, and predict-ed temperature evolution. The FEM successfully agreed with the experimental result. Various parameters influencing the fire performance of a concrete bridge deck were in-vestigated in this study. The findings indicate that aggregate types have little influence on the fire performance of concrete decks. The concrete deck subjected to 1-hour standard and hydrocarbon fire had a reduction of 13.9 and 17.7% of ultimate strength compared with the undamaged concrete deck while for 1hour and 2-hour standard fire had 15 and 19% respectively.&lt;/p&gt;</subfield>
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