复杂环境下加固型抗震大楼爆破拆除及数值模拟预测

RUGGED SEISMIC BUILDING DEMOLITION BLASTING UNDER COMPLICATED ENVIRONMENT AND ITS NUMERICAL SIMULATION PREDICTION

为了在复杂环境中确保拆除爆破的安全实施,丽江市古城区加固型抗震大楼采用三切口定向折叠倾倒的爆破方案,即在大楼的1~3层、7~9层、12~13层分别形成切口,通过半秒延时起爆,三个切口相继闭合,大楼折叠倾倒在空地上。在爆破拆除前利用有限元软件模拟了建筑物倒塌过程,通过数值计算对建筑物的倒塌范围进行了预测,并对倒塌过程中的前冲、后坐、底部膨胀等关键性数据给出了定量分析,结果表明预测数值与真实数据接近,工程及其数值模拟情况可为类似工程提供参考。

In order to ensure the safety of the demolition blasting of the rugged earthquake-resistant building in Lijiang under complicated environment, the scheme with three incisions dumping directional folding blasting was adopted. The incisions were formed respectively in the building of 1-3, 7-9, 12-13 layers, and they were closed one by one through half-second delay detonation. The building folding dumped on the ground. The collapse process was predicted with numerical simulation before the implementation of blasting and the key data about the moving-up, backward collapse, swelling at the bottom and so on were analyzed. The predicted values approached to the real data.