Numerical Simulation And Application For Vertical Collapse In Blasting Demoliton Of Buildings

In this paper,take the inpatient department of Shenyang Dongdian Hospital as an illustration,according to the specific situation of the inpatient department,ensure the direction of building collapse is longitudinal collapse,and then the blasting schemes,including different cutting-section parameters?delay time and the ways of detonation,are designed;use LS-DYNA software to simulate and anlyze the different blasting design schemes of the inpatient department;use SOLID164 element,*MAT_PLASTIC_KINEMATIC material to build integrated finite element model of reinforced concrete,use *MAT_ADD_EROSION to control the process of the disappearance of material and the delay time,and then form the blasting cut.The load-carrying members at the bottom of the structure are destroyed and lose support,use*LOAD_BODY_Z to apply the gravity load,witch can make the building produce gravity bending moment and turn round the fixed end and collapse.Compare the numerical simulation results and choose the best scheme.According to the best blasting design scheme,draw up the specific blasting demolition plan and content for the inpatient department of Shenyang Dongdian Hospital.Then compare the actual collapse results with the simulation result,which shows that the error between the two results is permitted.It is provided that using LS-DYNA simulation to predict the blasting demolition of building is successful.Using the method of numerical simulation can help design blasting scheme,which can increase the reliability of the design and reduce the workload.