The Shenzhen Stock Exchange Operations Center Lift The Skirt Building Structure Construction Monitoring Data Processing And Analysis

The development of long-span spatial structures has become one of the important indicators to measure the state-of-the-art of the national building science and technology. In recent years, great advances have been made in construction of long-span spatial structures in terms of number, style, scale etc. Due to the complex form of the long-span spatial structure, the high requirement of the construction technique, and the long construction period, the safety issues of the structure should not be ignored during the construction stage, structural health monitoring technology is an effective method which can monitor and evaluate the real working condition of the key structural components in the whole construction process, to ensure the construction in safety and order, and effectively avoid engineering accident.Firstly, the current status of the development of long-span spatial structure and the structural health monitoring technology is systematically reviewed. Then, taking the floating platform in the New Headquarters of Shenzhen Stock Exchange as an engineering paradingm. the key issues about structural health monitoring are investigated during the whole construction stage (especially at the unloading stage). The main contents of this dissertation are:(1) Introduction of the floating platform structure. The existing monitoring methods are substantially reviewed. The advantages and disadvantages of different methods of strain and deformation monitoring are summarized and compared. In combination with the actual situation of the structure, the appropriate monitoring method for the floating platform is chosen, and the structural health monitoring system of the floating platform is developed.(2) Processing of the stress monitoring data. Firstly, the effect of the environmental factors on stress monitoring is studied. Secondly, the stress monitoring data are described on different resolutions by using the wavelet transform method. The peaks and noises are filtered from the real-time monitoring signal by use of the wavelet denoising algorithm. Temperature-induced-stress component is excluded using the theory of multi-resolution decomposition and the correlation coefficient. The stress signals after processing, could well reflect the real stress responses during the construction process. Finally, the early-warning strategy of the floating platform is also proposed.(3) Real-time tracking the unloading process of the floating platform, the monitoring results of stress and deformation are analyzed to get the stress change status of floating platform, to make sure the unloading process in safety. Real-time tracking the whole construction process of the floating platform, the stresses and deformations of the key-structural components are obtained and the effect of the welding process on the strucual is experimentally studied. The monitoring results provide reliable technical support for the safety of the construction.