Numerical Simulation of Highway Double Curved Arch Bridge Structure Blasting Demolition

Abstract

Comparative analyzing pre-cutting seam in size between 0.5 m and 0.8 m in the top of bridge arch, and vice-arch column blasting range between 1.6 m and 0.8 m , numerical simulations on typical highway double curved arch bridge structure blasting demolition process are carried out adopting common node separate reinforced concrete model. Simulation result indicates that, common node separate model can reflect mechanical properties difference of concrete and reinforcement through analysis on their loading process. Adopting 0.5 m in size of pre-cutting seam is sufficient to ensure the superposition and complete collapse of the bridge. The vice-arch blasting range by 1.6 m can make the bridge more complete disintegration, and it can also decrease the whole collapse time and the height of muck pile.