| The construction of the Hong Kong Zhuhai Macao Bridge(HZMB), is a large cross sea bridge construction project linking Hong Kong, Zhuhai, Macao three places across two,This paper analyzed the structure of Cable-stayed bridge tower in detail and calculated the stress status of tower in the modular lifting process under the background of HZMB direct ship channel cable-stayed bridge tower lifting project. The tower as a symbol of the whole bridge building, is110meters high and2650t weight and the lifting work conducted in the sea. Due to the large volume,heavy weight and environmental factors,the lifting of the tower has become one of the riskiest, most difficult Engineering sections.The tower lifting construction process is divided into lifting, turning, translocation and shift several processes. In order to ensure the tower modular lifting process safe, reliable, accurate and secure,It is necessary to evaluate the safety of the tower lifting process. This paper selects three typical0°,45°nd90°ifting condition as simulation object, using finite element analysis software Ansys analyzes the stress condition of the tower under the action of spreader and own gravity. The analysis indicates that the strength and stiffness of the tower do not meet the requirements in the process of lifting. According to the results, Defining stress concentration area in three lifting conditions by the setpoint display block of Ansys,Then strengthen the tower by adding stiffeners and reinforcing steel according to the internal structure of the tower connecting with the spreader.Finally, re-checked strength, stiffness and stability of the strengthened tower under three lifting conditions. The results show that the Strength, stiffness and stability of the tower after strengthen are in line with the requirements. |
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