- 摘 要
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（中國建筑設計研究院， 北京 100044）
［摘要］東南國際航運中心總部大廈B座中庭幕墻立面尺寸約為25.0m×71.1m。幕墻立面以7層樓板為界，7層樓板標高以下垂直于地面，7層樓板標高以上向外傾斜，立面玻璃每層向室外偏移760mm。針對類似高大幕墻，分析常見支撐結構體系的優(yōu)缺點，并在此基礎上提出張弦梁與魚腹式索桁架組合支撐體系。該中庭幕墻豎向承重體系為張弦梁結構，水平向抗側結構為自平衡魚腹式索桁架，張弦梁與魚腹式索桁架通過豎向龍骨連為一體，以限制豎向承載結構和水平向抗側結構繞自身中心軸旋轉。張弦梁與魚腹式索桁架組合支撐體系設計時存在的重點和難點是：穩(wěn)定結構體系的建立、合理背索索力的確定、背索轉折處魚腹式索桁架加強措施和幕墻支撐體系與主體結構的連接方式。力學性能分析結果及工程實踐表明：該體系具有較好的結構剛度，索力自平衡，且建筑效果簡潔、通透。
［關鍵詞］張弦梁; 魚腹式索桁架; 自平衡體系； 索幕墻
中圖分類號：TU398-7文獻標識碼：A文章編號：1002-848X(2021)01-0050-04
Design and research on cable curtain wall structural system of Southeast International Shipping Center Headquarters Building B
DONG Yue, LUO Yi
(China Architecture Design & Research Group, Beijing 100044, China)
Abstract:The elevation size of atrium curtain wall in Southeast International Shipping Center Headquarters Building B is about 25.0m×71.1m. The facade of the curtain wall is bounded by 7-story floor slabs, which are perpendicular to the ground below the 7-story floor elevation, and slope outwards above the 7-story floor elevation, and each layer of facade glass is offset 760mm to the outside. Aiming at the similar tall curtain wall, the advantages and disadvantages of the common supporting structural system were analyzed, and on this basis, the combined supporting system of beam string structure and fish-belly shaped cable truss was proposed. The vertical load-bearing system of the atrium curtain wall is a chord beam structure, the horizontal anti-side structure is a self-balancing fish-belly shaped cable truss, and the chord beam and the fish-belly shaped cable truss are connected as one through the vertical keel, so as to limit the vertical load-bearing structure and the horizontal anti-side structure to rotate around its central axis. The key points and difficulties in the design of the combined support system of the beam string structure and the fish-belly shaped cable truss were as follows: the establishment of the stable structural system, the determination of the reasonable back cable force, the strengthening measures of the fish-belly shaped cable truss at the turn of the back cable, and the connection mode between the curtain wall support system and the main structure. The results of mechanical performance analysis and engineering practice show that the system has good structural stiffness, self-balance of cable forces, and simple and transparent architectural effect.
Keywords:beam string structure; fish-belly shaped cable truss; self-balanced system; cable curtain wall
作者簡介：董越，碩士，高級工程師，一級注冊結構工程師，Email：dongyue729@163.com。
