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

To improve the computing effectiveness of huge spatial structures for earthquake analysis,the load-dependent 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.