施工顺序对大跨度预应力混凝土结构变形影响研究

Study on the Influence of Construction Sequence on the Deformation of Long Span Pre-stressed Concrete Structures

施工方案的选择对工程项目尤为重要,尤其是大跨度预应力混凝土结构,其施工方案、施工顺序选择的重要性,不仅仅体现在项目的施工效率、施工安全性上,更体现在结构的质量保证、经济效益上。本文阐述了不同施工顺序对大跨度预应力混凝土结构的整体影响,通过“顺向张拉”和“逆向张拉”,总结出了对层间位移和层间位移转角的影响,利用数值模拟方法展开研究。对整体结构进行了模态分析,提前了解结构的自身特性,充分认识到施工顺序不同对建筑整体结构的影响,为实际工程中确定合理的施工方案提供参考依据。

The selection of construction schemes is particularly important for engineering projects,especially for large span pre-stressed concrete structures.The importance of selecting construction schemes and construction sequences is not only reflected in the construction efficiency and safety of the project,but also reflected in the quality assurance and economic benefits of the structure.This study describes the overall impact of different construction sequences on large span pre-stressed concrete structures,through"forward tensioning"and"reverse tensioning",Summarize the impact on inter story displacement and inter story displacement angle,conduct numerical simulation using SAP2000,conduct modal analysis on the overall structure,understand the characteristics of the structure in advance,fully recognize the impact of different construction sequences on the overall structure of the building,and provide a reference basis for determining a reasonable construction plan in practical engineering.