柱截面配筋對空間異形柱框架結(jié)構(gòu)性能的影響
曹云中1，干鋼1，唐錦春2
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（1 浙江大學(xué)建筑設(shè)計研究院， 杭州 310028； 2 浙江大學(xué)結(jié)構(gòu)工程研究所， 杭州 310058）［摘要］運用空間異形柱框架結(jié)構(gòu)的非線性有限元分析方法，對該框架作適當?shù)膯卧獎澐?，并用子結(jié)構(gòu)法提高計算效率，運用分區(qū)離散截面法來完成對異形截面的分離與組合。通過對不同柱截面配筋形式的空間異形柱框架在不同方向水平荷載作用下的推覆分析，獲得異形柱框架結(jié)構(gòu)在破壞過程、承載力、延性、側(cè)向位移、扭轉(zhuǎn)、滯回性能及剛度退化等各方面的結(jié)構(gòu)性能受柱截面配筋形式的影響規(guī)律?？v筋較集中在截面端部時，框架極限承載力較好，但要實現(xiàn)較好的延性，則需要根據(jù)柱軸壓比情況在截面上適當布置縱筋。［關(guān)鍵詞］異形柱； 框架； 結(jié)構(gòu)性能； 柱截面配筋形式； 推覆分析中圖分類號：TU375.4 文獻標識碼：A 文章編號：1002-848X(2013)15-0101-03Influence to structure performance of 3D-frame with special-shaped columns by reinforcing barsCao Yunzhong1, Gan Gang1, Tang Jinchun2(1 Architectural Design and Research Institute of Zhejiang University, Hangzhou 310028, China; 2 Institute of Structure Engineering, Zhejiang University, Hangzhou 310058, China)Abstract: Utilizing the nonlinear finite analysis method for the 3D-frame with special-shaped columns the structure performance is studied such as failure process, bearing capacity, ductility, lateral displacement, torsion, hysteretic performance and stiffness degeneracy. To increase computational efficiency, the substructure method and zonal discrete section method are applied to separate and fabricate the special-section of the column. The influence regularity on structure performance of the 3D-frame by distribution of reinforcement in column is discovered after the 3D-frame was analyzed by push-over under horizontal loading with various directions. The frame has better bearing capacity while more reinforcing bars located in the periphery of column section. The frame can have better ductility while reinforcing bars properly distributed in column section according to axial compression ratio.Keywords: Special-shaped column; frame; structure performance; distribution of reinforcement; push-over analysis作者簡介：曹云中，工學(xué)博士，Email：yunzhong6666@163.com。參考文獻［1］曹云中，干鋼，唐錦春.柱肢長寬比對空間異形柱框架抗震性能的影響［J］.工程力學(xué),2007,24(4):118-123.［2］曹萬林,田寶發(fā),尹恩太,等.鋼筋混凝土異形柱非線性全過程分析概述［J］.世界地震工程,1996,11(4):25-30.［3］《規(guī)程》編制組. 天津市異形柱框輕結(jié)構(gòu)的研究及技術(shù)規(guī)程編制 ［J］. 建筑結(jié)構(gòu), 1999, 29(1): 7-10.［4］曹萬林, 王紹英, 胡國振.大開間異型柱框架彈塑性工作性能研究［J］.世界地震工程,2000,16(1):40-46.［5］曹云中, 干鋼，唐錦春. 預(yù)應(yīng)力混凝土異形柱框架結(jié)構(gòu)性能的研究［J］. 浙江大學(xué)學(xué)報工學(xué)版, 2004, 38(6): 726-741.［6］崔慈艷, 鄭作樵.水平荷載下底層抽柱的異形柱框架受力分析［J］.福州大學(xué)學(xué)報：自然科學(xué)版, 1999,27(6): 56-60.
