筒中筒结构宽扁梁预应力的建立

Establishment of Pre-stress in Flat Beam of Tube-in-tube Structure

对混凝土筒中筒结构的楼盖预应力宽扁梁在不同施工阶段的预应力建立进行了分析和测试,并用有限元程序建立了对应阶段的结构分析模型,现场测试结果与有限元计算结果的对比分析,验证了原工程设计方法的可靠性,同时说明了在类似结构中预应力的建立以及预应力效应的产生是一个较为复杂的过程,应予以充分重视。

This paper introduces the analysis and test of prestressed flat beams in tube-in-tube concrete structures at different construction stages; moreover, the corresponding structural analysis models with FEA program are set up. Through the comparative analysis between the results of construction field test and that of calculation with FEA method, it proves the reliability of the primary design method; meanwhile, it also indicates that establishment of prestressing force and prestressed effects in similar structures is a complex procedure and should be noticed.