广州旧体育馆预拆除时的结构安全性监控

MONITORING OF STRUCTURAL SAFETY IN PRETREATMENT OF OLD GUANGZHOU GYMNASIUM BUILDING

介绍了广州旧体育馆爆破拆除前 ,大跨薄壳拱架钢筋混凝土结构的预切割。利用简化的结构模型进行构件受力的分析和计算 ,以此指导钢筋的预切割。实践表明 ,在具有延性破坏特征的结构中 ,预切割混凝土中的钢筋时 ,采用本文介绍的结构计算和变形、裂缝监测等安全技术是可行的 。

This paper introduces the precutting of reinforced concrete structure of long span and thin shell roof before blasting demolition of old Guangzhou Gymnasium Building The simplified structural models were used for analysis and calculation of structural stress,so as to guide the precutting of reinforced bars Practice shows that the safety techniques presented in this paper,such as structure calculation,monitoring of deformation and fractures,are feasible to precutting of the reinforced bars in the structural members having a feature of ductile fracture,and can ensure smoothly carrying the precutting operation out