Earthquake is always known as a natural phenomenon with complex and unpredictable characteristics. One of the parameters which affects the ground motion properties is soil. Seismic wave caused by ground motion can be modified based on the soil conditions including soil type and its depth. It means the wave displays different properties after passing a soil layer. In this study, by the use of a 2D numerical model simulated by OpenSees software, the effects of soil parameters on the seismic waves have been investigated. For this purpose three different types of soil based on Eurocode 8 under eleven ground motions have been analyzed and the results in terms of pseudo-spectral acceleration (PSA) and permanent displacement of soil surface have been reported. Besides, the influence of surcharge mass on the final seismic responses, as an important parameter in soil structure interaction problems, has been studied and the obtained results under different conditions have been compared.

地震一直被认为是一种具有复杂和不可预测特征的自然现象。影响地面运动特性的参数之一是土壤。由地面运动引起的地震波可以根据土壤条件（包括土壤类型及其深度）进行修正。这意味着波在穿过土层后表现出不同的特性。在这项研究中，通过使用 OpenSees 软件模拟的二维数值模型，研究了土壤参数对地震波的影响。为此，基于欧洲规范 8 的三种不同类型的土壤在十一种地面运动下进行了分析，并报告了伪谱加速度 (PSA) 和土壤表面永久位移方面的结果。此外，超载质量对最终地震响应的影响，