一、地震荷载强度与纵横波入射角和接触面的关系许多情况下结构计算时假定水平地震荷载是通过基础底面传递到房屋上的,实际上地震荷载既通过基础底面,也通过基础竖壁传予房屋。房屋遭受地震荷载的大小与地震波入射角有较大的关系。为讨论这个问题,特作以下规定;基础埋入土中,其形状为平行四面体,基础 First, the relationship between the seismic load intensity and P-wave incident angle and contact surface In many cases, it is assumed that the horizontal seismic load is transmitted to the house through the base floor in the structural calculation. In fact, the seismic load passes through both the base floor and the base vertical wall. To the house. The magnitude of the seismic load on the house has a large relationship with the incident angle of the seismic wave. In order to discuss this issue, the following provisions are specially made; the foundation is embedded in soil and its shape is a parallelepiped, based on