爆破技术与数值模拟在桥梁拆除中的应用

通过对桥梁爆破拆除工程实践的分类总结,简要介绍了国内桥梁爆破拆除中的要点及其达到的爆破效果及国外桥梁爆破拆除理论和数值模拟的状况.重点介绍了运用数值模拟软件ANSYS/LS-DYAN建立的共节点分离式模型模拟钢筋混凝土桥梁的爆破坍塌失稳过程,展现了数值模拟与工程实践结合的有效性及发展性,并列举了国内桥梁爆破拆除数值模拟的实例.

Application of Blasting Technique and Numerical Simulation in Bridge Demolition

The main points and the effects of the bridge demolition blasting were briefly introduced by classifying and summa- rizing the domestic engineering practices. With the increase of modern environmental requirements and dismantle difficulties, the condition of the theory and the numerical simulation of the bridge demolition blasting abroad were briefly introduced and the process of blasting collapse and instability of reinforced concrete bridges with common node separate finite element model by numerical simulation software ANSYS/LS - DYAN was mainly introduced, which has shown the effectiveness and expansi- bility of numerical simulation combined with engineering practices. Some examples about the numerical simulation of the bridges＇ demolition blasting at home were listed.