- 摘 要
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(1 混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點實驗室, 南京 210096; 2 東南大學(xué)土木工程學(xué)院,南京 210096; 3 湖南省建筑設(shè)計院有限公司, 長沙 410012)
摘要: 張家界馬戲城主館屋蓋是國內(nèi)少見的帶有大質(zhì)量懸掛子結(jié)構(gòu)的弦支穹頂屋蓋,對其屋蓋進(jìn)行抗連續(xù)倒塌性能評估,先對結(jié)構(gòu)進(jìn)行了桿件敏感性分析,確定結(jié)構(gòu)重要構(gòu)件,然后采用替換路徑法分別拆除弦支穹頂、子結(jié)構(gòu)的重要構(gòu)件,對屋蓋結(jié)構(gòu)進(jìn)行了非線性動力分析. 結(jié)果表明:拉索及支座處徑向桁架下弦桿是整個屋蓋的重要構(gòu)件;拆除外圈環(huán)索引起的結(jié)構(gòu)整體響應(yīng)最劇烈,拆除靠近支座徑向桁架下弦桿會引起結(jié)構(gòu)較明顯的局部響應(yīng);子結(jié)構(gòu)中,懸掛于徑向桁架上弦的矩形格構(gòu)柱沿柱截面失效,會使樓面梁局部變形過大,所有拆除工況均不會引起屋蓋結(jié)構(gòu)的倒塌;該帶懸掛子結(jié)構(gòu)的弦支穹頂鋼屋蓋冗余度高,具有較強(qiáng)的抗連續(xù)倒塌性能.
關(guān)鍵詞: 張家界馬戲城主館; 懸掛子結(jié)構(gòu); 弦支穹頂; 敏感性分析; 抗連續(xù)倒塌
中圖分類號:TU318 文獻(xiàn)標(biāo)志碼:A 文章編號:1002?848X(2022)16?0037?08
DOI:10. 19701 / j. jzjg. 20200909
Analysis and assessment of progressive collapse resistance of a chord dome roof with suspendedsubstructure in the main hall of Zhangjiajie Circus City
SHU Ganping1,2, PAN Rui1,2, WANG Siqing3, CHEN Feng3
(1 The Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Nanjing 210096,China; 2 School of Civil Engineering, Southeast University, Nanjing 210096, China; 3 Hunan Provincial ArchitecturalDesign Institute Co. , Ltd. , Changsha 410012, China)
Abstract: The roof of the main hall of Zhangjiajie Circus City is a rare chord dome roof with a large?mass suspendedsubstructure in China. The progressive collapse resistance of the roof was evaluated. Firstly, the member sensitivityanalysis of the structure was carried out, and the important structural members were determined. Then, using thereplacement path method, the important components of the chord dome and substructure were removed respectively, and thenonlinear dynamic analysis of the roof structure was carried out. The results show that the cables and lower chords of radialtruss connected to the bearing are key components. The overall response of the structure caused by the removal of the outerring cable is the most severe, and the removal of the lower chord of the radial truss near the bearing will cause a relativelyobvious local response of the structure. In the substructure, the rectangular lattice column suspended on the upper chord ofthe radial truss fails along the column section, which will cause the local deformation of the floor beam to be too large, andall the demolition conditions will not cause the collapse of the roof structure. The chord dome roof with a suspendedsubstructure has high redundancy and strong resistance to continuous collapse.
Keywords: main hall of Zhangjiajie Circus City; suspended substructure; suspend?dome; sensitivity analysis;progressive collapse
第一作者:舒贛平,教授,博士生導(dǎo)師,從事鋼結(jié)構(gòu)的抗震性能、抗連續(xù)倒塌性能研究,Email:sgp0818@ vip. sina. com.
[引用本文] 舒贛平,潘睿,王四清,等. 張家界馬戲城主館帶懸掛子結(jié)構(gòu)的弦支穹頂屋蓋抗連續(xù)倒塌分析與評估[J]. 建筑結(jié)構(gòu), 2022, 52 ( 16): 37?44. SHU Ganping, PAN Rui, WANG Siqing, et al. Analysis and assessment ofprogressive collapse resistance of a chord dome roof with suspended substructure in the main hall of Zhangjiajie Circus City[J]. Building Structure,2022,52(16):37?44.
