一、偶然荷载的特点及其概率模型作用于结构物的偶然荷载是指地震、各种原因引起的爆炸(瓦斯、锅炉、可燃液体、炸弹等)、车辆冲撞、强风暴等等偶然性出现的荷载。这类荷载的共同特点是出现概率很小,甚至可能在结构物的设计基准期内一次都不出现。然而,一旦出现,其量值极大,结构物将 First, the characteristics of casual loading and its probabilistic model Accidental load acting on the structure refers to the earthquake, a variety of causes of explosions (gas, boilers, combustible liquids, bombs, etc.), vehicle collision, strong storms and so on accidental loads . A common feature of such loads is the low probability of occurrence and may even not occur at all during the design baseline period of the structure. However, once it appears, its magnitude is great and the structure will