TITLE:
Load-Measuring Pot Bearing with Built-In Load Cell —Part II: Fatigue Performance and Experimental Temperature Correction
AUTHORS:
Jeong-Rae Cho, Young Jin Kim, Jong-Won Kwark, Sung Yong Park, Won Jong Chin, Byung-Suk Kim
KEYWORDS:
Pot Bearing; Load-Measuring; Load Cell; Fatigue; Temperature Correction
JOURNAL NAME:
Engineering,
Vol.5 No.11,
November
6,
2013
ABSTRACT: This paper presents the results of fatigue performance
tests performed up to 10 million cycles on a load-measuring pot bearing with
built-in load cell to verify its field applicability and proposes an empirical
temperature correction formula. In Part I of this work, various measurement
performances of the load-measuring pot bearing were evaluated through static
and dynamic loading tests. Bridge bearings are subjected to the effect of
fatigue caused by the repeated application of moving loads and exposed to harsh
site conditions including cold and hot weathers differently to laboratory conditions.
Accordingly, the durability of the load-measuring pot bearing with built-in
load cell shall be secured and the environmental effects like temperature shall
be minimized for its application on field. This study conducted fatigue tests
up to 10 million cycles on a load-measuring pot bearing with the capacity of 1000
kN to examine eventual degradation of the measurement accuracy with respect to
the number of fatigue loading cycles. In addition, the experimental temperature
correction procedure is proposed to obtain the temperature correction formula
enabling to correct the effect of temperature on the load measurement.