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为了解超高层建筑因爆破所致的倒塌或倾倒过程对周围建筑产生的破坏情况,使用基于颗粒流理论的PFC~(3D)作为模拟平台对该过程进行模拟。构建了A、B两栋结构相同、高度不同的超高层建筑,其相距30m。模拟分为三种工况(爆破点炸药量为10~6J、10~7J、10~8J),在其它条件不变情况下模拟了在A建筑爆破后倾倒或坍塌对B建筑的影响。模拟结果表明:当爆破药量为10~6J时,两建筑碰撞后B建筑先于A建筑坍塌,分别历经是72s和520s;当爆破药量为10~7J时,A建筑与B建筑历经84s后完成坍塌,这两种药量使建筑A均产生倾倒,在实际的过程中应避免。当爆破药量为10~8J时,可以完全破坏核心筒,便会产生对周围建筑最有利的A建筑坐塌破坏,进而减少对周围建筑的影响。
In order to understand the damage to the surrounding buildings caused by the collapsing or dumping process of super high-rise buildings due to blasting, this process was simulated using PFC ~ (3D) based particle flow theory as a simulation platform. Building A, B two identical structures, different height super high-rise buildings, the distance of 30m. The simulation is divided into three conditions (blasting point explosives amount of 10 ~ 6J, 10 ~ 7J, 10 ~ 8J), under the other conditions unchanged, simulated the impact of the dumping or collapse on the B building after the A building blasting. The simulation results show that when the blasting dose is 10 ~ 6J, the B buildings in the two buildings collide with the A buildings before they collide, which are 72s and 520s, respectively. When the blasting dose is 10 ~ 7J, the A and B buildings after 84s After the completion of the collapse, these two doses of construction A are dumping, in the actual process should be avoided. When the blasting dose is 10 ~ 8J, the core tube can be totally destroyed, which will result in the most favorable collapse of the A building on the surrounding buildings, thereby reducing the impact on the surrounding buildings.