Horizontal Deformation Control Strategy and Implementation Method of Eccentric Core Tube Structure Based on Construction Error Uncertainty

Abstract

Estimating and controlling the horizontal deformation of eccentric core-tube structure is challenging due to the time-varying characteristics of concrete materials and structural construction. In order to solve the construction uncertainty, an analysis method of horizontal deformation control theory based on construction error uncertainty is proposed in this paper, which is used to predict the overall deflection in the project design stage. At the same time, considering the construction complexity, the relationship between deviation correction value, structural initial deformation, structural positional posture, and deformation increment data is established. And the “prediction-measurement-construction-adjustment” stage transformation control method is established, which is used to check and adjust the predicted pre-arch target curve in the construction period. The engineering implementation method of the deviation correction scheme of wall line control is put forward based on the construction stringing habit. The proposed method was evaluated on a 390-m high-rise building with numerical simulation and measure verifications. The results show that when the control method is adopted, the top displacement of the structure is only 8 mm, which is much smaller than 75 mm without considering the horizontal deformation control strategy. The proposed control method can effectively control the horizontal deflection of the structure under construction, and the predicted value is in good agreement with the measured value during the observation period.

Keywords

• super high-rise building
• eccentric core tube
• horizontal deformation control
• construction error uncertainty
• deviation correction
• pre-arch target curve