Case Study on the Effect of Delay-Time Differences between Columns during Blasting Demolition of RC Structures with a Small Height-to-Width Ratio

Blasting demolition plays an important role in building demolition, and numerical-simulation methods can facilitate the optimization of blasting-demolition schemes. To study influence delay-time differences between columns on blasting effect small-aspect-ratio reinforced concrete structures, a separated common node model structures was established through finite element numerical simulation software ANSYS/LS-DYNA. The results showed that influenced position plastic hinge structure, located at end back span beam when difference 0.1~0.3 s. moves to top row first floor 0.4~0.8 s each beams 0.9 When is beam, orientation axis bottom floor. Moreover, floor, same as hinge. also affects recoil distance structure well height burst pile. ensure be successfully collapsed under preconditions disintegration, for small height-to-width ratio appropriate intercolumn 0.4~0.5