RESEARCH OF VERTICAL DEFORMATION AND PREDEFORMATION OF SUPER HIGH-RISE BUILDINGS DURING CONSTRUCTION

To attain vertical deformation rules for a super high-rise building during the construction and to set up a practical construction simulation method and technology of pre-deformation controlling, the construction full-process analysis of three typical high-rise buildings over 400m high in China were made. The discrete analysis method of a time-varying structure, the age-adjusted effective modulus method, the element birth and dead and technology of stepwise loading were used simultaneously to carry out the simulation of time-varying material, time-varying geometry parameters, time-varying loading and boundary conditions, a systematic technology of simulation of construction process for a super high-rise building was exploited, and the vertical deformation rules were obtained. Furthermore, a pre-deformation analysis method for a super high-rise building was achieved with deformation compensation stepwise. The total vertical displacement and relative deformation between core tube and steel frame were made as the controlling target in the method, which could give vertical pre-deformation values and provide a theoretical support for construction deformation controlling of super high-rise buildings.