大跨非对称空间结构多维地震动反应研究

The research of multi-dimensional seismic responses of large span asymmetric spacial structure

为研究多维地震动对大跨非对称空间结构的影响,本文利用弹性波动理论法获取地震动扭转分量,按照工程实际将多维地震动作用到大跨空间结构计算模型,通过分析模型的位移与基础内力变化,发现扭转分量对大跨非对称空间结构位移与基础内力有时具有较明显影响,在此类结构的设计中应考虑地震动转动分量对结构全局位移及基础内力的影响。

For the research of the multi-dimensional seismic responses of large span asymmetric spacial structure, the apparent seismic velocity with certain significance in practical engineering was got by averaging different velocity of different references. The time-histories of rotational component was obtained by elastic wave motion theory. The multi-dimensional seismic responses of Dalian International Conference Center （DICC） was analyzed. The change of the control points＇ displacement and the inner force of the support cylinder in the foundation were analyzed. It was concluded that the rotational component can apparently affect the displacement of the whole structure and the inner force of the foundation. The global effect of displacement and the local effect of inner force of the foundation should be taken into consideration in the design phase of large span asymmetric spacial steel structure to some ex- tent.