TY - GEN
T1 - Seismic evaluation of skew bridge with friction type rubber bearings - Experiments and case studies
AU - Lu, Chih Hung
AU - Chang, Kuo Chun
AU - Liu, Kuang Yen
AU - Cheng, Wei Chin
PY - 2010
Y1 - 2010
N2 - The seismic response of the skew bridges with rubber bearing is studied. In Taiwan, simply-supported PCI bridges are widely used with rubber bearing pads as a supporting system. It is common seen that, during the construction practice, the rubber bearing pads have been laid on the cement mortar-made bearing pads without any details of bolting design. This kind of arrangement potentially allows rubber bearing to slide, so as the superstructure when the earthquake occurs. In addition, bridges are usually being skewed to provide transportation service, requiring a further investigation of seat width to avoid falling of the superstructure. In this study, firstly, a series of friction coefficient was conducted. Furthermore, a scale-down skew bridge model has been constructed to perform the shaking table test. According to the experimental results, the inertial forces from superstructure can be reduced because of the sliding-induced isolation effect. The analytical program, SAP2000N was used to simulate the experimental results, and it has been shown the numerical model can predict the acceptable displacement demand. Based on the parametric study, finally, the study will discuss the bridge behaviors with different skew angles and input directions of time histories.
AB - The seismic response of the skew bridges with rubber bearing is studied. In Taiwan, simply-supported PCI bridges are widely used with rubber bearing pads as a supporting system. It is common seen that, during the construction practice, the rubber bearing pads have been laid on the cement mortar-made bearing pads without any details of bolting design. This kind of arrangement potentially allows rubber bearing to slide, so as the superstructure when the earthquake occurs. In addition, bridges are usually being skewed to provide transportation service, requiring a further investigation of seat width to avoid falling of the superstructure. In this study, firstly, a series of friction coefficient was conducted. Furthermore, a scale-down skew bridge model has been constructed to perform the shaking table test. According to the experimental results, the inertial forces from superstructure can be reduced because of the sliding-induced isolation effect. The analytical program, SAP2000N was used to simulate the experimental results, and it has been shown the numerical model can predict the acceptable displacement demand. Based on the parametric study, finally, the study will discuss the bridge behaviors with different skew angles and input directions of time histories.
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M3 - Conference contribution
AN - SCOPUS:84867186008
SN - 9781617388446
T3 - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
SP - 5573
EP - 5582
BT - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
T2 - 9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
Y2 - 25 July 2010 through 29 July 2010
ER -