| Vibrating-Sliding Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces |
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| 作者姓名： | WANG Yuan-zhan |
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| 作者单位： | Department of Port and Coastal Engineering，School of Civil Engineering，Tianjin University，Tianjin 300072，China，Department of Port and Coastal Engineering，School of Civil Engineering，Tianjin University，Tianjin 300072，China |
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| 基金项目： | This project was financially supported by the National Natural Science Foundation of China(Grant No.50279027) |
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| 摘 要： | Sliding is one of the principal failure types of caisson breakwaters and is an essential content of stability examination in caisson breakwater design. Herein, the mass-spring-dashpot model of caisson-base system is used to simulate the vi-brating-sliding motion of the 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 impacts and the sliding motion on the dynamic response behaviors of caisson breakwaters are investigated and the calculation of relevant system parameters is discussed. It is shown that the dynamic responses of the caisson are significantly different under different types of breaking wave impact forces even when the amplitudes of impact forces are equal. The amplitude of dynamic response of the caisson is lower under single peak impact excitation than that under double peak impact or shock-damping oscillation impact excitation. Though the disp
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Vibrating-Sliding Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces |
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| WANG Yuan-zhan and YU Hong-xia.Vibrating-Sliding Motion of Caisson Breakwaters Under Various Breaking Wave Impact Forces[J].China Ocean Engineering,2003,17(4):565-576. |
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| Authors: | WANG Yuan-zhan and YU Hong-xia |
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| Institution: | Department of Port and Coastal Engineering, School of Civil Engineering, Tianjin University, Tianjin,300072, China Department of Port and Coastal Engineering, School of Civil Engineering, Tianjin University, Tianjin,300072, China |
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| Abstract: | Sliding is one of the principal failure types of caisson breakwaters and is an essential content of stability examination in caisson breakwater design. Herein, the mass-spring-dashpot model of caisson-base system is used to simulate the vi-brating-sliding motion of the 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 impacts and the sliding motion on the dynamic response behaviors of caisson breakwaters are investigated and the calculation of relevant system parameters is discussed. It is shown that the dynamic responses of the caisson are significantly different under different types of breaking wave impact forces even when the amplitudes of impact forces are equal. The amplitude of dynamic response of the caisson is lower under single peak impact excitation than that under double peak impact or shock-damping oscillation impact excitation. Though the displacement of the caisson is large due to sliding, the rotation, the sliding force and the overturning moment of the caisson are significantly reduced. |
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| Keywords: | breakwater various types of breaking wave impact vibrating-sliding motion |
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