- 摘 要
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(華東建筑設(shè)計研究院有限公司, 上海 200002)
摘要: 介紹了 G60 科創(chuàng)云廊大跨自由曲面單層鋁合金網(wǎng)殼結(jié)構(gòu)設(shè)計中的幾個關(guān)鍵問題,包括結(jié)構(gòu)方案的確定過程、自由曲面單層網(wǎng)格結(jié)構(gòu)的形態(tài)構(gòu)建方法、網(wǎng)格的布置和優(yōu)化、超長外露結(jié)構(gòu)的溫度應(yīng)力,以及無覆蓋網(wǎng)格結(jié)構(gòu)風(fēng)荷載的確定、盤式節(jié)點抗剪加強和剛度的考慮、網(wǎng)殼的整體穩(wěn)定及樹狀柱的極限承載力分析等. 結(jié)果表明,所采用的形態(tài)構(gòu)建方法合理有效,能夠得到受力高效且符合建筑對外形期望的理想形態(tài);構(gòu)件網(wǎng)格的布置符合力流走向且兼顧了透風(fēng)率和構(gòu)件長細比的需求;溫度效應(yīng)的不利影響通過取消長方向冗余構(gòu)件、合理布置相對低膨脹系數(shù)的鋼構(gòu)件得到明顯緩解;可采用實體風(fēng)洞測力與數(shù)值風(fēng)洞測壓相結(jié)合的方式確定鏤空網(wǎng)格結(jié)構(gòu)的風(fēng)荷載;增設(shè)一字或十字腹板連接板的方式可以有效加強傳統(tǒng)盤式節(jié)點的抗剪承載力.
關(guān)鍵詞: 鋁合金單層網(wǎng)殼; 自由曲面形態(tài)構(gòu)建; 網(wǎng)格優(yōu)化; 溫度效應(yīng); 無覆蓋結(jié)構(gòu)風(fēng)荷載; 整體穩(wěn)定
中圖分類號:TU395,TU393 文獻標志碼:A 文章編號:1002-848X(2022)09-0074-07
DOI:10. 19701 / j. jzjg. HDY2228
Key issues in single-layer aluminum lattice shell structure design of the G60 Science and TechnologyInnovation Cloud Gallery
ZHOU Jian, LI Yanpeng, CUI Jiachun
(East China Architectural Design & Research Institute Co. , Ltd. , Shanghai 200002, China)
Abstract: Several key issues in the design of a large span free-form single-layer aluminum lattice shell structure of the G60Science and Technology Innovation Cloud Gallery was introduced, including the structural scheme decision process,morphology and optimization of the free-form single-layer grid structure, topology and optimization of the grid structure,large temperature stress caused by ultra-long exposed structure,the approach to determine the wind load of the unclad gridstructure,shear bearing capacity strengthening of plate joints and its stiffness consideration, the overall stability of thereticulated shell and the ultimate bearing capacity analysis of the tree column, etc. The results show that the adoptedmorphology method is reasonable and effective, and can obtain the form with high efficiency and in line with the architect’s expectations. The layout of the component grid is in line with the force flow direction and takes into account therequirements of air permeability and component slenderness ratio. The adverse effects of temperature effects are alleviatedby canceling redundant components in the long direction and reasonably arranging steel components with relatively lowexpansion coefficients. The combination of physical wind tunnel force measurement and numerical wind tunnel pressuremeasurement is used to determine the wind load of the hollow grid structure; the addition of a straight or cross webconnecting plate can effectively enhance the shear bearing capacity of traditional plate joints.
Keywords:single-layer aluminum latticed shell; free-form morphology and optimization; grid optimization; temperatureeffect; wind load on unclad structure; overall stability
∗上海市優(yōu)秀技術(shù)帶頭人計劃資助(21XD1430400) .
第一作者:周健,碩士,正高級工程師,主要從事空間大跨和超高層結(jié)構(gòu)設(shè)計,Email: jian_zhou@ ecadi. com.
[引用本文] 周健,李彥鵬,崔家春. G60 科創(chuàng)云廊單層鋁合金網(wǎng)殼結(jié)構(gòu)設(shè)計關(guān)鍵問題分析[ J] . 建筑結(jié)構(gòu),2022,52(9) :74-80. ZHOU Jian,LI Yanpeng,CUI Jiachun. Key issues in single-layer aluminum lattice shell structure design ofthe G60 Science and Technology Innovation Cloud Gallery [ J] . Building Structure,2022,52(9) :74-80.
