考虑结构自重影响水下隧道通风竖井的水平振动特性研究

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Abstract The seismic response of structure is a complex multi-field coupling issue considering the dynamic interaction effect of soil-water-tunnel shaft simultaneously. Based on the principle of Winkler foundation beam，and the hydrodynamic pressure is considered as the added pseudo mass，the deformation governing differential equation of the Euler beam is established according to the model in which the interface soil is simplified as spring modeling the soil-structure interaction，and the deformation and stress of structure are solved under the seismic loading using the transfer matrix method. Furthermore，a comparative analysis is employed by the usual software ANSYS，it is found that，the introduced foundation beam model and calculation method can reflect the actual vibration characteristics of tunnel shaft in soft soil effectively. Finally，the distribution of internal force along the shaft influenced by the connection joint and self-weight of structure is analyzed，through the discussion of parameters，it is concluded that，the internal force of structure can be decreased by reducing the connecting stiffness between tunnel and shaft，and the degree of structural security is increased；meanwhile，the factor of self-weight of structure is extremely important for the vibration properties of partially embedded tunnel shaft with large cross section，which can not be ignored by designers.

Key words： tunnelling engineering ventilation shaft Winkler foundation beam model transfer matrix method dynamic response

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	CHEN Xianghong1
	ZHANG Hongru1
	CHEN Xi2

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CHEN Xianghong1,ZHANG Hongru1,CHEN Xi2. RESEARCH ON HORIZONTAL VIBRATION PROPERTIES OF UNDERWATER VENTILATION SHAFT OF TUNNEL CONSIDERING EFFECT OF SELF-WEIGHT OF STRUCTURE[J]. , 2013, 32(s2): 3726-3731.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3726

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