COMPARATIVE STUDY ON THE BEHAVIOR OF THE TWO ELEMENTS OF REINFORCED CONCRETE INCHEON GRAND BRIDGE, SEOUL, SOUTH KOREA UNDER THE EFFECT OF TEMPERATURE VARIATIONS

Gh. M.T. Radulescu, Gh. Ardelean, Sanda Nas, M. V.G.M. Radulescu, A. T.G.M. Radulescu

Abstract


Structural Monitoring, now known under the acronym SHM (Structural Health Monitoring) has a history of over 150 years, but the current operating manner in a very broad recording frequency spectrum, evolving from the static to the dynamic mode, going through quasi-static or quasi-dynamic monitoring, of only 40-45 years. This paper concerns the monitoring under quasi-static continuous regime of a bridge with exceptional design features: the Incheon Grand Bridge Seoul, South Korea. The bridge, respectively its structural elements made of steel and reinforced concrete, are monitored to ascertain the effect of temperature variations on them. Two of the structural elements observed are of reinforced concrete, Bridge Gap from South line, respectively Gap Bridge from North line. In the monitoring process, pairs of data are formed, the cause, i.e. the air temperature, considered the X variable, and the effect - the movement of the sensors mounted on structural elements, which in this paper we will consider the dependent variable Y. Entering the mentioned pairs of data in various software, Table Curve 2D AND 3D, IBM SPSS 21, DataFit 9.1, SimFit, Statistica, etc., authors define mathematical models of the structural behavior. The authors initially checked the recorded data for the full year 2010, with take-offs once every 15 minutes , approx. 35,000 data pairs and then they selected three temperatures (maximum, average, minimum) for each of the 44 degrees, from -11 ° C to + 33° C, validating the mathematical models with the original data. It will be found that the structural elements being similar, subject to the same degree of variation in temperatures, under the same conditions and belonging to the same structure, there are very obvious similarities of their structural behavior.

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DOI: http://dx.doi.org/10.15835/arspa.v93i1-2.11135



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