Study on blasting demolition and numerical simulation of a 120 m high reinforced concrete chimney
In order to successfully demolish a 120 m high reinforced concrete chimney by blasting,the design of blasting scheme was completed according to the actual engineering environment and engineering structure characteristics,and the rationality of blasting design was verified by finite element software LS-DYNA.The results show that the collapse process of the numerical simulation is highly consistent with the actual collapse process.The collapse process of the chimney lasts about 10.5 s.During the collapse process,the chimney cylinder mainly undergoes three stages:incision closure,sit-down and touchdown collapse,and the motion characteristics of different stages are obvious.The overall blasting scheme is reasonable,and the reinforced concrete chimney is successfully demolished by blasting,which achieves the expected effect and has guiding significance for similar engineering practice.
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