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（廣東省建筑設(shè)計研究院， 廣州 510010）
［摘要］我國的《建筑抗震設(shè)計規(guī)范》（GB 50011—2010）及《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》（JGJ 3—2010）規(guī)定鋼筋混凝土框架結(jié)構(gòu)的彈性層間位移角限值為1/550。對于層高較大的框排架結(jié)構(gòu)，如機(jī)場航站樓、鐵路站房、體育館等建筑，柱頂鉸接，排架結(jié)構(gòu)的位移比框架結(jié)構(gòu)大，層間位移角限值往往成為柱截面的控制因素。這些建筑的圍護(hù)結(jié)構(gòu)多為金屬或玻璃幕墻，能承受較大的變形，如混凝土柱仍按1/550的層間位移角限值設(shè)計，柱截面往往偏大。如為滿足位移角限值而采用鋼柱或鋼管混凝土柱，則經(jīng)濟(jì)代價較大。在廣州白云國際機(jī)場二號航站樓工程中，對支撐鋼屋蓋的混凝土柱施加預(yù)應(yīng)力，當(dāng)結(jié)構(gòu)的彈性層間位移角限值放寬至1/350時，預(yù)應(yīng)力混凝土柱仍基本處于彈性狀態(tài)，柱截面尺寸得到優(yōu)化，建筑效果和經(jīng)濟(jì)效益顯著。
［關(guān)鍵詞］廣州白云國際機(jī)場； 預(yù)應(yīng)力混凝土柱； 層間位移角； 框排架結(jié)構(gòu)
中圖分類號： TU378.3 文獻(xiàn)標(biāo)識碼： A文章編號： 1002-848X(2016)S2-0137-05
Prestressed concrete column design of Guangzhou Baiyun International Airport Terminal 2
Tan He, Li Zhenzhang, Zhang Hongyan
(Architectural Design & Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract: Chinese design standard Code for seismic design of buildings （GB 50011—2010） and Technical specification for concrete structures of tall building （JGJ 3—2010） stipulate that the limitation for the elastic inter-story displacement angle of reinforced concrete frame structure is 1/550. For frame-bent structures such as airport, railway station and gymnasium, because hinge joints exist at the top of the columns and the displacement of bent structure is much larger than that of frame structure, the limitation value of inter-story displacement angle usually becomes the critical factor for determining their column sizes. Most of the exterior protected structure of these frame-bent structures buildings are metal or glass curtain wall which can sustain large deformation. If the concrete columns are chosen for the frame-bent structures and are designed following the limit value of inter-story displacement angle as 1/55, the column sizes will be over-large; while if the steel columns or the steel tube concrete columns are adopted, the cost will be expensive. In order to overcome the dilemma, in Guangzhou Baiyun International Airport Terminal 2 building, prestressing technique is applied to the concrete columns that support roof. In this case, the prestressed concrete column performed elastically even when the elastic inter-story displacement angle is around 1/350. Using this approach could reduce the column size, and improve significantly the aesthetic aspects and economic benefits of the building.
Keywords: Guangzhou Baiyun International Airport； prestressed concrete column; inter-story displacement angle; frame-bent structure
作者簡介： 譚和，高級工程師，一級注冊結(jié)構(gòu)工程師，Email:644634157@qq.com。
