水平地震作用的最敏感方向垂直桥的轴线。
The direction which is the most susceptible to horizontal earthquake action is perpendicular to the bridge axis.
在分析中，考虑了四层高架结构在地震时的耦合振动作用，以及地震波传播方向的任意性。
In the analysis, both the coupled vibration of four level structures under earthquake and the randomness of spread directions of input seismic waves were considered.
分析认为，孕震应力场的应力强度对孕震区内地震的破裂方向有明显的约束作用。
This suggests that focal stress intensity has restraining effect on earthquake's rupture direction.
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