- 摘 要
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（奧雅納工程顧問， 廣州 510620）
［摘要］基于對多個超高層項目中伸臂桁架進行的深入研究，提出伸臂桁架數(shù)量與塔樓高度之間的近似關(guān)系，指出將伸臂桁架設置在0-5H～0-9H區(qū)段樓層時可有效減小結(jié)構(gòu)側(cè)移，設置在0-3H～0-7H區(qū)段的樓層時可更好地控制結(jié)構(gòu)自振周期，設置在0-3H以下的樓層時可有效減小底部樓層核心筒墻肢的拉應力。并介紹了伸臂桁架的常用形式，根據(jù)其抗側(cè)效果的不同給出了對應的適用條件；分析了伸臂桁架與核心筒墻體和框架柱的連接節(jié)點方式，提出相關(guān)設計建議；指出應注重研究伸臂的合攏時間，以控制內(nèi)外筒沉降差對結(jié)構(gòu)的不利影響，確保塔樓施工過程中的安全性。
［關(guān)鍵詞］伸臂桁架； 自振周期； 抗側(cè)剛度； 連接節(jié)點
中圖分類號：TU973文獻標識碼：A文章編號：1002-848X(2018)18-0015-07
Design methods of outrigger trusses in high-rise building
Hou Shengli, Zhao Hong
(ARUP， Guangzhou 510620， China)
Abstract:Based on the deeply study on the outrigger trusses applied in several high-rise buildings, the approximate relationship of the quantity of outrigger trusses and the height of building were proposed. The lateral displacement may be evidently reduced if outrigger trusses are placed on the stories located between 0-5H to 0-9H. The outriggers which were installed between 0-3H to 0-7H of the building are much helpful to control the natural vibration periods, and the tension stress of the core wall could be decreased when outriggers are placed on the stories lower than 0-3H. The common forms of outriggers were introduced together with the applicable conditions according to their effects to increase the lateral stiffness. The types of outrigger joints with core wall and columns were analyzed and the relevant design suggestions were proposed. Finally, it is pointed out that it is important to ensure the safety during construction by choosing the proper time to close the outrigger and strictly controlling the adverse effects of the different settlement between the core wall and the outer frames.
Keywords:outrigger; natural vibration period; lateral stiffness; joint
作者簡介：侯勝利，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：sheng-li.hou@arup.com。
