The effect of spatially varying earthquake ground motions on the stochastic response of bridges isolated with friction pendulum systems

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• 作者：Sevket Ates ; Alemdar Bayraktar and A. Aydin Dumanoglu
• 关键词：Spatially varying earthquake ground motion ; Site-response effect ; Incoherence effect ; Uniform ground motion ; Isolated bridge ; Friction pendulum system
• 刊名：Soil Dynamics and Earthquake Engineering
• 出版年：2006
• 出版时间：January 2006
• 年：2006
• 卷：26
• 期：1
• 页码：31-44
• 全文大小：1551 K

文摘

In this paper, a comprehensive investigation of the effect of spatially varying earthquake ground motions on the stochastic response of bridges isolated with friction pendulum systems is performed. The spatially varying earthquake ground motions are considered with incoherence, wave-passage and site-response effects. The importance of the site-response effect, which arises from the difference in the local soil conditions at different support points of the isolated bridge, is investigated particularly. Mean of maximum and variance response values obtained from the spatially varying earthquake ground motions are compared with those of the specialised cases of the ground motion model. It is shown that site-response component of the spatially varying earthquake ground motion model has important effects on the stochastic response of the isolated bridges. Therefore, to be more realistic in calculating the isolated bridge responses, the spatially varying earthquake ground motions should be incorporated in the analysis.