大跨空间结构地震反应分析的一种高效算法

High Efficiency Method in the Earthquake Analysis for Large-span Spatial Structures

为了提高大跨空间结构复杂结构体系地震反应分析的效率,将基于荷载的Ritz向量代替特征值向量引入反应谱分析和模态时程分析,与直接积分法和利用特征值向量进行的反应谱和模态时程方法相比,可以将计算时间降至原来的几十分之一,并且能获得较高的计算精度.该方法用于风振和结构的舒适度等其他动力分析同样能取得良好的效果.

To improve the computing effectiveness of huge spatial structures for earthquake analysis, the loaddependent Ritz vector is introduced into the mode superposition or the mode transient analysis method. The computing time of the direct integration method and the mode superposition method by using characteristic eigen vectors has been decreased by several percent. The computing accuracy can satisfy the engineering demand easily. This method can also be used in the wind vibration analysis, comfort analysis and other dynamic analysis for the structure.