新型大跨度空间结构施工卸载优化数值研究

发布时间：2018-01-08 20:04

本文关键词：新型大跨度空间结构施工卸载优化数值研究　出处：《结构工程师》2014年06期 　论文类型：期刊论文

【摘要】：施工卸载过程是指对支撑体系(脚手架体系)的卸载,而对结构体系自身来说恰恰是加载过程,在此过程中由于结构的边界条件会发生改变,结构的内力水平也会发生较大的变化,由此导致内力重新分配,部分杆件的受力状态会随加载过程发生正、负交替的变化,甚至超出设计应力,同时伴随着结构较大的几何变形。由此可知大跨度空间结构施工卸载过程的重要性。有鉴于此,对新型大跨度空间结构钢屋盖施工卸载过程进行了数值模拟研究,探讨了不同施工卸载方案对结构造成的影响(结构内力和支撑体系内力方面),最后给出了较优的钢结构施工卸载方案。
[Abstract]:The construction unloading process refers to the unloading of the braced system (scaffolding system), but to the structure itself is the loading process, in which the boundary conditions of the structure will change. The internal force level of the structure will also change greatly, which will lead to the redistribution of internal force. The stress state of some members will change positively and negatively with the loading process, and even exceed the design stress. At the same time, with the large geometric deformation of the structure, we can see the importance of the construction and unloading process of the long-span spatial structure. Numerical simulation of the unloading process of steel roof of a new type of large span space structure is carried out, and the influence of different construction and unloading schemes on the structure (internal force of structure and internal force of bracing system) is discussed. Finally, the optimal construction and unloading scheme of steel structure is given.
【作者单位】：南昌工程学院土木与建筑工程学院;
【基金】：江西省科技支撑(2013BBG 70099) 江西省青年基金(20144BAB2160014) 江西省教改课题(JXJG-12-18-18)
【分类号】：TU74
【正文快照】： 1引言施工卸载过程是指对支撑体系(脚手架体系)的卸载,而对结构体系自身来说恰恰正是加载过程,在此过程中由于结构的边界条件会发生改变,结构的内力水平也会发生较大的变化,应力重新分配,部分杆件的受力状态甚至会随加载过程发生正负交替的变化或超出设计应力,结构产生较大的

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