薄壁钢管混凝土结构施工安全性问题初探

薄壁钢管混凝土结构中的空钢管在施工阶段可充当浇注混凝土的模板,此时它在承受结构自重和竖向施工荷载的同时,还承受湿混凝土的静水压力或其他动压力。在探讨薄壁空钢管承受的施工荷载确定方法的基础上,采用ABAQUS软件建立空钢管施工阶段受力分析的有限元模型,通过具体算例,对薄壁钢管混凝土结构施工安全性的一些问题进行探讨。

PRELIMINARY RESEARCH ON SAFETY OF CONCRETE FILLED THIN-WALLED STEEL TUBULAR STRUCTURES DURING CONSTRUCTIoN

The hollow steel tubes used in concrete filled thin-walled steel tubular structures are often served as formwork for the infill of concrete. The hollow steel tubes suffer the vertical construction loads and self-weight of the structures, as well as the hydrostatic loads of inner wet concrete or other dynamic loads during the construction stage. This paper firstly determined the construction load based on a literature review. Then, a finite element analysis was performed for hollow steel tubes under construction loads. Based on the analysis results of an example, some key issues on the construction safety of concrete-filled thin- walled steel tubular structures were discussed.