采用理论分析与数值计算的方法对高耸建筑物爆破拆除中建筑物倾倒过程中的内力进行了分析计算 ,得到了内力的演化规律。同时提出了建筑物倾倒过程中发生断裂的判据 ,并由此确定了建筑物倾倒时发生断裂的原因及发生断裂的位置 The internal forces during the dumping of buildings in blasting demolition of tall buildings are analyzed and calculated by theoretical analysis and numerical calculation, and the evolution law of internal forces is obtained. At the same time, the criterion of the rupture during the dumping of the building is put forward, and the reason of the rupture and the location of the rupture when the building is dumped are determined