- 摘 要
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(1 土木工程安全與耐久教育部重點實驗室 清華大學, 北京 100084; 2 北京市鋼與混凝土組合結構工程技術研究中心 清華大學, 北京 100084; 3 中海企業(yè)發(fā)展集團, 上海 200092; 4 中國五洲工程設計集團有限公司, 北京 100053; 5 華東建筑設計研究院有限公司, 上海 200002)
摘要: 天津周大福金融中心項目塔樓帽桁架采用構造復雜的鑄鋼節(jié)點。 通過有限元數(shù)值模擬,分析該節(jié)點在各荷載工況下的力學性能,給出了節(jié)點在不利荷載下的應力分布和危險位置。 在此基礎上,開展局部加載試驗,分析節(jié)點的受力性能和相貫截面位置的應力水平。 結果表明:部分柱肢相貫位置應力較大,建議采用倒角緩解局部應力集中,或設置加勁肋局部加強;試驗加載過程中各柱肢均處于彈性狀態(tài),承載力儲備高。 分析結果驗證了鑄鋼節(jié)點在本工程中應用的安全性,可為其他相關工程提供參考。
關鍵詞: 周大福金融中心; 鑄鋼節(jié)點; 鋼結構; 局部加載試驗; 應力分布
中圖分類號:TU318 文獻標志碼:A 文章編號:1002 ̄848X(2022)04 ̄0081 ̄05
DOI:10. 19701 / j.jzjg.20210961
Performance analysis on complex cast steel joint of Tianjin Chow Tai Fook Financial Center
SHI Gang1,2, ZHAO Huatian1, RONG Chengxiao3, DING Dayi4, LIU Wei4, ZHOU Jian5, WANG Rong5
(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University,Beijing 100084, China; 2 Beijing Engineering Research Center of Steel and Concrete Composite Structures, TsinghuaUniversity, Beijing 100084, China; 3 China Overseas Development Group Co., Ltd., Shanghai 200092, China;4 China Wuzhou Engineering Group Co., Ltd., Beijing 100053, China; 5 East China Architectural Design & ResearchInstitute Co., Ltd., Shanghai 200002, China)
Abstract: Complex cast steel joints have been utilized in the hat trusses of the tower structures in Tianjin Chow Tai FookFinancial Center project. Finite element analysis was conducted to investigate the mechanical behavior of cast steel jointssubject to different loading cases, and the stress distribution and dangerous position of joints under unfavorable loads weregiven. On this basis, local loading tests was carried out to analyze the mechanical behavior of joints and the stress levels ofthe intersecting sections. The results show that some intersecting positions of columns suffered high stress. It isrecommended that measures should be taken to reduce the local stress concentration using chamfer angles or locallystrengthening the critical positions by stiffeners. All the columns kept elastic in the test with a considerable margin of safety.The safety of the cast steel joints applied in the project has been verified by the analysis results, providing a reference forother related projects.
Keywords:Chow Tai Fook Financial Center; cast steel joint; steel structure; local loading test; stress distribution
第一作者:施剛,博士,教授,博士生導師,主要從事鋼結構研究,Email: shigang@ tsinghua.edu.cn。
[引用本文] 施剛,趙華田,榮成驍,等. 天津周大福金融中心復雜鑄鋼節(jié)點性能分析[J]. 建筑結構,2022,52(2):81 ̄85. SHI Gang, ZHAO Huatian, RONG Chengxiao, et al. Performance analysis on complex cast steel joint of TianjinChow Tai Fook Financial Center[J]. Building Structure,2022,52(2):81 ̄85.