- 摘 要
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（中南建筑設(shè)計院股份有限公司， 武漢 430071）
［摘要］圓鋼管混凝土柱在超高層建筑中的應(yīng)用越來越多，當采用鉸接型柱腳設(shè)計時，柱底承臺局部受壓問題不容忽視。為解決超高層建筑采用圓鋼管混凝土柱一柱一樁設(shè)計時無法施工承臺螺旋箍筋的問題，提出了新的雙重環(huán)箍構(gòu)造形式，結(jié)合實際工程分析了一柱一樁構(gòu)造下承臺在軸力作用下的受力特點，驗證了雙重環(huán)箍構(gòu)造的可行性，并對其構(gòu)造形式做了優(yōu)化分析。通過對8個ABAQUS有限元模型的分析，結(jié)果表明：一柱一樁設(shè)計中承臺的局部受壓承載力已不能直接利用《混凝土結(jié)構(gòu)設(shè)計規(guī)范》（GB 50010—2010）中的公式進行驗算，雙重環(huán)箍構(gòu)造形式能夠滿足承臺局部受壓承載力設(shè)計要求，且比單層螺旋箍筋構(gòu)造具有更好的延性、更高的承載力，施工也更簡單。
［關(guān)鍵詞］局部承壓； 圓鋼管混凝土柱； 一柱一樁； 雙重環(huán)箍
中圖分類號：TU473-1文獻標識碼：A文章編號：1002-848X(2018)18-0107-06
Application research on local compression capacity of the concrete member with double layer hoop in the design of one column with one pile
Xiao Fei, Zhang Yuliang, Ji Han, Chen Yanzhou
(Central-South Architectural Design Institute Co., Ltd.， Wuhan 430071， China)
Abstract:The application of concrete-filled circular steel tube columns in super high-rise buildings is being popular, and the problem of local compression of this column cannot be ignored when using the hinged column foot. A new structural form of double layer hoop was presented to solve the problem that spiral stirrups are unable to be constructed in the super high-rise buildings when using the design of one column with one pile. Based on the actual project, the mechanic properties of pile cap in the design of one column with one pile under axial compression were analyzed. The feasibility of the structural form of double layer hoop was verified and a preliminary optimization analysis has been made. The results of finite element analysis about 8 ABAQUS models shows that the local compressive bearing capacity of the caps in one column with one pile cannot be directly verified using the formula in the Code for design of concrete structures(GB 50010—2010). The form of double layer hoop can meet the requirements of the design calculation. Analysis shows that the structural form of double layer hoop has better tensility performance, higher bearing capacity and more construction convenience than the spiral stirrups of single layer.
Keywords:local compression; concrete-filled circular steel tube column; one column with one pile; double layer hoop
作者簡介：肖飛，學(xué)士，教授級高級工程師，一級注冊結(jié)構(gòu)工程師，Email:XiaoFei@csadi.net。
