- 摘 要
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(1 中南建筑設(shè)計院股份有限公司， 武漢 430071；2 北京工業(yè)大學(xué)空間結(jié)構(gòu)研究中心， 北京 100124；3 煙臺大學(xué)土木工程學(xué)院， 煙臺 264005)
摘要: 針對溫州某體育館圓柱面弦支穹頂屋蓋結(jié)構(gòu)的索系選型，建立了 Levy 型索系方案和無環(huán)索型索系方案。探討了兩種方案的建筑美感，比較了兩種方案的經(jīng)濟指標。 采用 MIDAS Gen 軟件建立模型分析結(jié)構(gòu)在靜力荷載作用下的桿件內(nèi)力、節(jié)點位移和上部網(wǎng)殼應(yīng)力，探討了兩種方案的結(jié)構(gòu)剛度和索力分布特點。 采用弧長法進行荷載￣位移全過程分析，探討了兩種方案的靜力承載力和破壞模式。 基于拆除構(gòu)件法分析了結(jié)構(gòu)斷索后的響應(yīng)，探討了兩種方案的抗連續(xù)倒塌性能。 結(jié)果表明:無環(huán)索方案在經(jīng)濟指標方面優(yōu)于 Levy 型方案；兩種方案的靜力破壞模式均為強度破壞，但無環(huán)索方案的承載力較大。 無環(huán)索方案的結(jié)構(gòu)剛度更大、索力較低且每層索力分布均勻，上部網(wǎng)殼應(yīng)力更??；兩種方案在斷索后均未發(fā)生連續(xù)倒塌，Levy 型方案在環(huán)索局部破斷后結(jié)構(gòu)剛度下降較大，索力損失較多，無環(huán)索方案發(fā)生內(nèi)力重分布且索力損失不明顯，抗連續(xù)倒塌性能好于 Levy 型方案。
關(guān)鍵詞: 大跨空間結(jié)構(gòu)；弦支穹頂結(jié)構(gòu)；圓柱面弦支穹頂結(jié)構(gòu)；無環(huán)索弦支穹頂結(jié)構(gòu)；拆除構(gòu)件法
中圖分類號:TU398. 7 文獻標志碼:A 文章編號:1002￣848X(2022)01￣0041￣08
DOI:10. 19701 / j. jzjg. 20211056
Comparative study on the performance of Levy type and loop￣free type cable￣strut system ofcylindrical suspen￣dome
LI Hongsheng1， XUE Suduo2， WU Yifeng1， LIU Renjie3， LI Xiongyan2， FU Li1
(1 Central￣South Architectural Design Institute Co.， Ltd.， Wuhan 430071， China；2 Spatial Structures Research Center， BeijingUniversity of Technology， Beijing 100124， China；3 College of Civil Engineering， Yantai University， Yantai 264005， China)
Abstract: Aiming at designing the cable￣strut system of the cylindrical suspen￣dome roof structure in a gymnasium inWenzhou， a Levy type scheme and a loop￣free type cable￣strut scheme were proposed. The architectural beauty of the twoschemes was discussed. The economic indicators were compared. The MIDAS Gen software was used to establish a model toanalyze the component internal force， joint displacement and stress of upper reticulated shell under the static load actions，and the structure stiffness and cable force distribution characteristics were discussed. The load￣displacement analysis wascarried out by the arc length method， and the static bearing capacity and failure mode of the two schemes were discussed.Based on the dismantling component method， the response of the structure after cable breaking was analyzed， and theprogressive collapse resistance was discussed. The results show that the loop￣free type scheme is better than the Lery typescheme in terms of the economic factors. The static failure modes of the two schemes are both strength failure. The carryingcapacity of the loop￣free type scheme is relatively larger. The loop￣free type scheme has greater structural rigidity， lowercable forces and uniform cable force distribution in each layer， and its stress of upper reticulated shell is smaller. There isno progressive collapse in two schemes after the cable breaking. The Levy type scheme has a significant reduction instructural rigidity after the loop cable is partially broken， and has cable force loss. The internal force of the loop￣free typestructure is redistributed and the loss of cable force is not obvious， and it has better progressive collapse resistanceperformance than Levy type scheme.
Keywords:large￣span spatial structure；suspen￣dome structure；cylindrical suspen￣dome structure；loop￣free type suspen￣dome structure；dimantling component method
∗山東省自然科學(xué)基金青年項目(ZR201911030049)，國家自然科學(xué)基金面上項目(51778017)。
第一作者:李宏勝，學(xué)士，教授級高級工程師，主要從事建筑結(jié)構(gòu)設(shè)計，Email:79211959@ qq. com。
[引用本文] 李宏勝，薛素鐸，吳逸楓，等. 圓柱面弦支穹頂 Levy 型與無環(huán)索型索系性能對比研究[J]. 建筑結(jié)構(gòu)，2022，52(1):41￣48，69. LI Hongsheng，XUE Suduo，WU Yifeng，et al. Comparative study on the performance of Levy typeand loop￣free type cable￣strut system of cylindrical suspen￣dome[J]. Building Structure， 2022， 52(1):41￣48，69.
