这是由于系统不再具有垂直于表面方向的平移对称性而产生的非均匀效应。
These are nonuniform effects due to the system no longer having the translational symmetry in the direction perpendicular to the surface.
且考虑了屋面活载不均匀效应、雪压堆积效应和水平地震作用的影响，荷载组合复杂。
The load combination is complex with consideration of the effect of asymmetry distribution of live load, snow accumulation and horizontal seismic load.
当不均匀沉降较明显时，必须检查其对结构内的作用效应。
Where significant differential settlements are likely their influence on the action effects in the structure should be checked.
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