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(1 天津大學(xué)建筑工程學(xué)院, 天津 300072; 2 河北工程大學(xué)土木工程學(xué)院, 邯鄲 056038)
摘要: 為合理評估桿件彎曲對網(wǎng)殼結(jié)構(gòu)力學(xué)性能的影響,并對存在桿件彎曲缺陷的網(wǎng)殼結(jié)構(gòu)進行有效的加固設(shè)計方案,有必要對桿件彎曲機理進行研究. 通過對某雙層螺栓球節(jié)點網(wǎng)殼結(jié)構(gòu)進行施工全過程精細化模擬,分別從施工方法、溫度效應(yīng)以及支座節(jié)點性能對結(jié)構(gòu)的靜力性能影響進行了分析. 結(jié)果表明:考慮內(nèi)擴懸挑施工方案的影響后,桿件最大應(yīng)力增大 29%,結(jié)構(gòu)最大位移增大 11%;下部網(wǎng)殼對溫度效應(yīng)較為敏感,隨著環(huán)境溫度的升高,溫度應(yīng)力相比合攏時增大 3. 7 倍;當(dāng)支座構(gòu)造高度過大,考慮支座節(jié)點影響后,支座位移變化明顯,與支座相連的桿件迅速屈服. 因此,設(shè)計和施工此類網(wǎng)殼結(jié)構(gòu)時,應(yīng)合理考慮上述因素的影響.
關(guān)鍵詞: 網(wǎng)殼結(jié)構(gòu); 桿件彎曲; 施工全過程; 溫度效應(yīng); 支座節(jié)點性能
中圖分類號:TU391 文獻標志碼:A 文章編號: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
∗河北省全職引進高端人才科研項目(2020HBQZYC013).
第一作者:高喜峰,博士,副教授,主要從事建筑與船舶工業(yè)研究,Email:gaoxifeng@ tjiu. edu. cn.
[引用本文] 高喜峰,楊詩文,劉紅波,等. 網(wǎng)殼結(jié)構(gòu)施工過程易引發(fā)桿件彎曲關(guān)鍵因素研究[J]. 建筑結(jié)構(gòu),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.
