(1 天津大学建筑工程学院, 天津 300072; 2 河北工程大学土木工程学院, 邯郸 056038)

摘要: 为合理评估杆件弯曲对网壳结构力学性能的影响,并对存在杆件弯曲缺陷的网壳结构进行有效的加固设计方案,有必要对杆件弯曲机理进行研究. 通过对某双层螺栓球节点网壳结构进行施工全过程精细化模拟,分别从施工方法、温度效应以及支座节点性能对结构的静力性能影响进行了分析. 结果表明:考虑内扩悬挑施工方案的影响后,杆件最大应力增大 29%,结构最大位移增大 11%;下部网壳对温度效应较为敏感,随着环境温度的升高,温度应力相比合拢时增大 3. 7 倍;当支座构造高度过大,考虑支座节点影响后,支座位移变化明显,与支座相连的杆件迅速屈服. 因此,设计和施工此类网壳结构时,应合理考虑上述因素的影响.

关键词: 网壳结构; 杆件弯曲; 施工全过程; 温度效应; 支座节点性能

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2023)03-0109-07

DOI:10. 19701 / j. jzjg. 20201780

Research on key factors of bar bending in construction process of reticulated shell structure

GAO Xifeng1, YANG Shiwen1, LIU Hongbo2, CHEN Zhihua1

(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 School of Civil Engineering, HebeiUniversity of Engineering, Handan 056038, China)

Abstract: In order to evaluate the effect of bar bending on the mechanical properties of the reticulated shell structure and tocarry out effective reinforcement design for the reticular shell structure with bar bending defects, it is necessary to study thebending mechanism of bar. The effect of construction method, temperature effect and bearing node performance on thestatic performance of a double-layer bolted ball node mesh shell structure was analyzed through the fine simulation of thewhole construction process. The results show that the maximum stress of the bar increases by 29% and the maximumdisplacement of the structure increases by 11% after considering the influence of the overhanging construction scheme. Thelower reticulated shell is sensitive to the temperature effect. With the increase of ambient temperature, the temperaturestress increases by 3. 7 times compared with that of closing. When the bearing structure height is too high, the bearingdisplacement changes obviously after considering the influence of bearing nodes, and the bar connected with the bearingrapidly yields. Therefore, the influence of the above factors should be considered reasonably when designing andconstructing this kind of reticulated shell structure.

Keywords:reticulated shell structure; bar bending; whole construction process; temperature effect; performance of supportjoint

∗河北省全职引进高端人才科研项目(2020HBQZYC013).

第一作者:高喜峰,博士,副教授,主要从事建筑与船舶工业研究,Email:gaoxifeng@ tjiu. edu. cn.

[引用本文] 高喜峰,杨诗文,刘红波,等. 网壳结构施工过程易引发杆件弯曲关键因素研究[J]. 建筑结构,2023,53(3):109-115. GAO Xifeng,YANG Shiwen,LIU Hongbo,et al. Research on key factors of bar bending in constructionprocess of reticulated shell structure[J]. Building Structure,2023,53(3):109-115.