Vibrating-Uplift Rocking Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces

WANG Yuan-zhan; ZHOU Zhi-rong; YANG Hai-dong

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WANG Yuan-zhan, ZHOU Zhi-rong, YANG Hai-dong. Vibrating-Uplift Rocking Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces[J]. Applied Mathematics and Mechanics, 2005, 26(5): 534-540.

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Vibrating-Uplift Rocking Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces

Tianjin Key Laboratory of Harbor & Ocean Engineering, School of Civil EngineeringTianjin University, Tianjin 300072, P. R. China

Received Date: 2003-09-25
Rev Recd Date: 2005-01-18
Publish Date: 2005-05-15

Abstract

Abstract

Overturning is one of principal failure types of caisson breakwaters and is an essential content of stability examination in caisson breakwater design. The mass-spring-dashpot model of caisson-foundation system is used to simulate the vibrating-uplift rocking motion of caisson under various types of breaking wave impact forces, i. e., single peak impact force, double peak impact force, and shock-damping oscillation impact force. The effects of various breaking wave types and the uplift rocking motion on dynamic response behaviors of caisson breakwaters are investigated. It is shown that the dynamic responses of a caisson are significantly different under different types of breaking wave impact forces even when the amplitudes of impact forces are equal. Though the rotation of a caisson is larger due to the uplift rocking motion, the displacement, the sliding force and the overturning moment of the caisson are significantly reduced. It provides the theoretical base for the design idea that the uplift rocking motion of caisson is allowed in design.
- breakwater,
- breaking wave type,
- vibration,
- uplift rocking motion

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References(17)

References

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