At first, small wave load have caused an amount of damage and decrease the ultimate bearing capability to the structures, then fatigue load have caused wholly destroy.
The truth structure destruction is decided by the combination action of load breadth and circular load effect explains preferably effect three essential of earthquake motions to structure destroy.
破坏是由荷载幅值和循环加载效应的联合作用引起这一事实，较好地解释了地震动三要素对结构破坏的影响。
3
The alternate test of static load and dynamic load on RC beam serves the study of the frequency change disciplinarian from integrity to destroy of RC beam.