| Hoop-stove chimney in the Bao-steel incorporated company steel pipe factory set up in oceanic industrial environment has complex working conditions, and structural form that a heavy-duty tank is attached to the canister is very special. However currently its condition not only hard satisfies the normal usage and request of the durability but also possibly threatens structural safety.The systemic study on reliability and reinforcement technique about hoop-stove chimney of the Bao-steel incorporated company steel pipe factory is made. Firstly, according to investigate the examination result, the current usage of hoop-stove chimney is proceeded thorough analysis. Secondly, the finite element mechanical analysis and some check including bearing capacity, heating temperature, fracture and deformation about hoop-stove chimney are processed. The next in order, in light of usage condition and result of calculation and analysis, the reason for chimney impairment and defect is analyzed; Fourthly, for the general reinforced concrete chimney, according to reliabilityinfluencing factor of chimney, assess index and criterion for evaluation of chimney reliability is perfected and appraisal methods of chimney reliability is improved and reliability of hoop-stove chimney the chimney is evaluated. Lastly, aiming at the problem lying in hoop-stove chimney, the paper establishes the feasible maintenance and reinforcement scheme and demonstrates potential negative effect.The research result not only reveals the reason for impairment and defect of hoop-stove chimney and mechanical physics function but also improves the method of reliability assess for the reinforced concrete chimney and reasonably appraisals the reliability of hoop-stove chimney. Maintenance and reinforcement scheme not only ultimately solves long-standing problem of hoop-stove chimney but also has great value on processing reinforced concrete chimney built on soft soil foundation.
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