带横隔矩形钢管混凝土柱顶升浇筑施工安全高度计算方法研究

Research on Calculation Method of Safe Height for Jacking⁃up Construction of Concrete⁃filled Rectangular Steel Tube Column with Dense Diaphragm

针对带横隔板矩形钢管混凝土柱泵送阻力大、管壁易变形、角部焊缝处应力集中的问题,结合理论分析和数值模拟,提出施工过程中柱内压力限值及顶升单元最大安全高度的简化计算方法。以实际工程为例,采用简化公式计算其安全顶升高度,表明该简化计算公式具有工程适用性。在确定柱内压力限值时,宜优先采用有限元法,无条件时可采用简化公式进行快速估算。

Aiming at the problems of large pumping resistance,easy deformation of tube wall,and stress concentration at weld corner of rectangular steel tube column with dense diaphragm,a simplified calculation method for the internal pressure limit and the maximum safe height of jacking unit during construction is proposed based on theoretical analysis and numerical simulation.Taking an actual project as an example,the simplified formula is used to calculate the safe jacking height,which shows that the simplified calculation formula has engineering applicability.When determining the pressure limit in the column,the finite element method should be used firstly,and the simplified formula can be used for quick estimation when there are no conditions.