重力式单腿平台结构相互作用体系平、扭动力响应分析

THE DYNAMIC RESPONSE OF R.C. GRAVITY SINGLE LEG PLATFORM INTERACTION SYSTEM

本文主要对钢筋混凝土重力式单腿海洋平台结构相互作用体系在地震激励下进行了响应分析。按波动理论,建立土—结构—流体相互作用体系的非线性运动方程组。它包含了两类相互作用问题:土—结构相互作用;流体—结构相互作用。分析了在不同方向地震SH波输入下非对称结构及流体作用等影响对体系的地震响应,最后结合一个简单的例子给出了数值计算结果。

In this paper, the dynamic response of R. C. single leg platform interaction system to the action of seismic loads is analysed. Based on the wave theory, a set of differential equations of nonlinear motion due to the seismic SH wave is established. These equations include two type of interaction problems. One is the interaction in soil-structure system and the other is the fluid-structure interaction. The dynamic response of interaction system is analysed for the influence of nonsymmetric structure and fluid action, etc. ,with the input of the seismic SH wave in any direction. Finally, the analysis of the dynamic response of a gravity single leg platform structure is taken as a simple example of applying this method, and the numerical results are given.