Seismic Structural Analysis Method for Large-scale Structure

地震结构反应受断层-结构系统引起的强地震动时空变化的影响，包括断层机制、地震波在地壳中的传播、近地表的放大以及土-结构相互作用等。为了高分辨率、高精度地估计此类结构的地震反应，本文提出了一种基于多尺度分析的结构地震反应分析方法，并通过小问题数值模拟验证了该方法的有效性。由于构造大规模问题的三维数值模型的建立和离散化控制方程的求解计算量非常巨大，无法进行基于实际背景的断层-构造系统的数值模拟。因此，我们也开发了一种新的方法来解决这些困难。通过与绿色函数解的比较，验证了该方法的准确性，并基于断层-结构体系对给定地震情景下大型复杂结构的地震反应进行了估计，展示了该方法的潜在实用性。

Seismic structural response is affected by temporal and spatial variation of strong ground motion, which is caused by fault-structure system: fault mechanism, wave propagation through the crust, the amplification near the ground surface and the soil-structure interaction. In order to estimate such seismic structural response with high resolution and high accuracy, we propose a new analysis method based on multi-scale analyses and numerically verify its validity using small problem. Since the computation cost of construction of 3-D numerical model for large-scale problem including structure and solving the disritizaed governing equation is extremely huge, we cannot conduct numerical simulation based on fault-structure system with actual setting. Thus, we also develop a new method to resolve these difficlties. The accuracy of our method is verified by the comparison with Green's function solution, and seismic response of large-scale complex structure in given earthquake scenario is estimated based on fault-structure system to present its potential usefulness.