摘要
本文研究海底隧道体系在深部一个底面处给定的地震动作用下的反应分析方法。研究中计及了海水的影响,采用了有限元模型和时域解法。其中,根据作者的先期研究结果,给出了考虑海水影响的质量矩阵的形成方法根据岩-土叠合一类体系的阻尼分布特点,以及不再适宜用经典阻尼矩阵描述体系相应特性的考虑,经过物理分析,给出了与问题的物理图式符合较好的阻尼矩阵的形成方法;最后对一实例进行了数值计算和结果分析,说明了有关的几个问题。
In this paper, a method for seismic response analysis of undersea tunnel systems is presented. The system to be investigated is a complex one which consists of rock surroundings (or with the addition of linings), soil covers and sea water, and is subjected to an input shaking given at a plane which is selected as the bottom of the system.According to a research result provided by the authors previously[5], the problem of response analysis can be decoupled, and from this a practical subsystem model is established. Taking the influence of sea water into account, the effective mass matrix of the subsystem composed of rock and soil is formulated. In addition, according to the feature of damping distribution of the subsystem and the consideration that describing the damping characteristics of the subsystem by using the classical damping matrix is no longer suitable, a rational formulation of the damping matrix which is in keeping with the physical pattern of the distribution is given.Finally, the numerical computation in time domain for a typical example is done, and some results and conclusions are obtained.
出处
《地震工程与工程振动》
CSCD
北大核心
1992年第2期90-98,共9页
Earthquake Engineering and Engineering Dynamics
基金
地震科学联合基金
