混凝土框架结构拆除改造施工模拟及监测研究

Research on Construction Simulation and Monitoring for Demolition and Reconstruction of Concrete Frame Structure

某混凝土框架结构建筑因功能更新进行改造,为满足大空间要求,需进行大范围的柱、梁和板的拆除,具有较高的安全风险。通过有限元分析模拟拆改过程中结构的状态变化,优化改造和监测方案,并在改造施工期间通过自动化监测和人工巡检相结合的方式,对结构的倾斜、沉降、挠曲、损伤等情况进行了全程监测。结果表明:实测值与施工模拟分析结果吻合良好,监测期间未出现报警情况,未发现明显结构损伤,施工模拟与监测相结合可有效降低结构在改造期间的安全风险。

A concrete frame structure needs to be reconstructed due to functional updating.In order to meet the requirements of large space,massive columns,beams,and plates need to be demolished,which indicates a high safety risk.Therefore,finite element analysis was carried out to simulate structural state changes during the demolition and optimize reconstruction and monitoring schemes.During the reconstruction,automatic monitoring and manual inspection were adopted to monitor the inclination,settlement,deflection,and damage of the structure.It is shown that the measured values are in good agreement with the construction simulation and analysis results,and there is no alarm and no obvious structural damage during the monitoring period.The combination of construction simulation and monitoring can effectively reduce structural safety risks during the reconstruction.