Based on both the boundary element and spectral representation methods, an effective simulation method for multiple-station spatially correlated ground motions on both bedrock and surface is developed, incorporating the spectral density function, coherence function, and site transfer function that consider the wave scattering effect. The accuracy and feasibility of the present method is validated by a typical numerical example. Our results indicate that at the coupled alluvial valley-hill terrain, the presence of the mountain enlarges the ground motion of the alluvial valley significantly; the existence of alluvial valley enlarges the ground motion at the ridge of the mountain to some extent and weakens the ground motion at the top of the mountain. The local site conditions significantly affect the multipoint spatially correlated earthquake ground motions. It is necessary to use spatially varying ground motions with the rational consideration of local site effects as input during the seismic analysis of long-span structures

基于边界元和谱表示方法，开发了一种有效的模拟方法，结合了考虑了波散射效应的谱密度函数，相干函数和位点传递函数，对基岩和地表上的多站空间相关地面运动进行了仿真。 。通过一个典型的数值例子验证了本方法的准确性和可行性。我们的研究结果表明，在耦合的冲积山谷-丘陵地带，山的存在显着扩大了冲积山谷的地震动。冲积谷的存在在一定程度上扩大了山脊处的地震动，削弱了山顶处的地震动。当地的现场条件显着影响多点空间相关的地震地面运动。在大跨度结构地震分析中，有必要使用空间变化的地震动，并合理考虑局部场地的影响作为输入