(1 中南大学土木工程学院，长沙 410073；2 国防科学技术大学校务部基建办公室，长沙 410073)

[摘要]  通过某厂房拔除承重柱后，采用预应力技术对大跨度空间桁架梁进行加固的理论分析、方案选择以及信息化施工的整个过程的介绍，结合改造前后的监测数据，得到如下结论：采用预应力技术可以有效的减少因拔除承重柱而引起的大跨度空间桁架梁挠度过大的问题，正确的对改造前后的结构进行有限元建模以及分析，针对承重柱拔除后结构的薄弱部位进行加固，结合变形实测数据对施工过程进行监测，是确保结构改造过程安全的有效方法。

[关键词]  大跨度;空间桁架梁;预应力混凝土技术;监测

中图分类号：TU398.7　　　文献标识码：　　文章编号：

作者简介：范士超，工程师，硕士研究生，从事结构改造加固方面的研究，70836967@qq.com．

Application of prestressed technology in the rebuilding of spatial frame structure

Fan Shichao^1,2, Zhang Lang², Li Xuewu², Shi Haibing², Xia Jianzhong²

(1　School of Civil Engineering, Central South University, Changsha 410073, China;2　Infrastructure Construction Office, Department of Logistics, National University of Defense Technology, Changsha 410073, China)

Abstract: According to the functional change, the structural supported column must be removed to satisfy the requirement of assembling equipment. By virtual of theoretical analysis, the suitable strengthen method are choose and information monitoring are carried out. In according with monitoring data, we found that utilize prestressed technology can reduce the deflection of spatial frame when the supported column of frame are removed. The correct finite element model and theoretical analysis, combine with information monitoring data can ensure safety of the structure.

Keywords: long span; spatial frame structure; prestressed technology; monitoring

参考文献

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