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（1 湖南城建職業(yè)技術學院建筑工程系， 湘潭 411101；2 中南林業(yè)科技大學土木工程學院, 長沙 410004；3 中國水利水電第九工程局有限公司， 貴陽 550001）
［摘要］為了優(yōu)化四肢鋼管混凝土格構(gòu)柱的設計，更好地掌握格構(gòu)柱的抗震性能，完成了2根四肢鋼管混凝土格構(gòu)柱的低周反復加載試驗，并通過試驗校核修正了有限元模型。利用ANSYS有限元軟件對四肢鋼管混凝土格構(gòu)柱進行了三維非線性數(shù)值模擬，重點研究了軸壓比、等效長細比及材料比例系數(shù)對試件耗能能力的影響。研究結(jié)果表明：材料比例系數(shù)ζ越大，試件延性越好，當ζ=1-5～2-5時，四肢鋼管混凝土格構(gòu)柱的耗能性能較好，且當ζ≈2時，試件材料比例系數(shù)設計最佳；一般軸壓比n越大，試件水平承載力越大，但延性變差，當n=0-2～0-5時，四肢鋼管混凝土格構(gòu)柱的耗能性能較好，且當n≈0-5時，試件軸壓比設計最佳；一般隨著等效長細比增大，試件水平承載力降低，延性越好，但建議四肢鋼管混凝土格構(gòu)柱的名義長細比控制在10以內(nèi)。
［關鍵詞］四肢鋼管混凝土格構(gòu)柱； 擬靜力試驗； 有限元分析； 模型校正； 耗能能力
中圖分類號：TU398-7文獻標識碼：A文章編號：1002-848X(2018)24-0085-06
Finite element analysis of energy dissipation capacity of four-tube concrete filled steel tubular lattice columns
Zou Yanhua1， Chen Bowang2， Wen Hong3
（1 Department of Architectural Engineering, Hunan Urban Construction College, Xiangtan 411101, China；2 School of Civil Engineering, Central South University of Forestry and Technology, Changsha 410004, China；3 SINOHYDRO Bureau 9 Co., Ltd., Guiyang 550001, China）
Abstract:In order to optimize the design and to better grasp the seismic performance of four-tube CFST (concrete filled steel tubular) lattice columns, 2 four-tube CFST lattice columns were tested under low cyclic reversed loading, and finite element models were checked and corrected by the experiment. Three dimensional nonlinear numerical simulation of four-tube CFST lattice columns were built by ANSYS software, and the influence of axial compression ratio, equivalent slenderness ratio and material proportion coefficient on the energy dissipation capacity of specimens were focused on research. The results show that: with the increase of material proportion coefficient ζ, the ductility increases. When ζ is 1-5～2-5, the energy dissipation performance of specimens is good, and when ζ is 2, the design of the material proportion coefficient is better; with the increase of axial compression ratio n, the bearing capacity of specimens increases, but the ductility decreases. When n is 0-2～ 0-5, the energy dissipation performance of specimens is good, and when n is 0-5, the design of the material proportion coefficient is better; with the increase of the equivalent slenderness ratio, the horizontal bearing capacity of specimens decreases and the ductility increases, but the nominal slenderness ratio of four-tube CFST lattice columns is controlled to be less than 10.
Keywords:four-tube CFST lattice column; quasi-static test; finite element analysis; model verification; energy dissipation capacity
*國家自然科技基金項目（E080501）。
作者簡介：鄒艷花，碩士，講師， Email: 15111464071@163.com。
