基于构件荷载-变形曲线的约束混凝土本构模型对比分析
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摘要
对16根钢筋混凝土圆柱进行了低周反复荷载试验,并采用6个不同的约束混凝土应力-应变模型对试件骨架曲线进行了计算。分析表明,尽管所选的约束混凝土应力-应变模型的差别很大,但利用不同的模型计算的柱荷载-变形曲线差别不大,与试验得到的荷载-变形曲线差别也不是很大,差别主要反映在曲线的下降段;在所选取的6个约束混凝土应力-应变关系模型中,采用Mander-Priestley模型和Fafitis-Shah模型计算的荷载-变形曲线与本文试验结果符合最好。
Cyclic loading tests were carried out on sixteen circular RC columns and the load-deformation curves of these columns were calculated using the chose six different stress-strain models of confined concrete. The results show that although the difference among the individual confined concrete models are remarkable,but their influence on load-deformation curves of column are unapparent and the discrepancy is on the descending branch of load-deformation curves. In the chose six stress-strain models of confined concrete,the prediction of load-deformation curves of column based on Mander-Priestley model and Fafitis-Shah model show satisfactory agreement with the experimental results.
Cyclic loading tests were carried out on sixteen circular RC columns and the load-deformation curves of these columns were calculated using the chose six different stress-strain models of confined concrete. The results show that although the difference among the individual confined concrete models are remarkable,but their influence on load-deformation curves of column are unapparent and the discrepancy is on the descending branch of load-deformation curves. In the chose six stress-strain models of confined concrete,the prediction of load-deformation curves of column based on Mander-Priestley model and Fafitis-Shah model show satisfactory agreement with the experimental results.
引文
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[9]钱稼茹,程丽荣.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报:自然科学版,2002,42(10):1369-1373.
[10]GB50010—2010混凝土结构设计规范[S].
[11]Esmaeily-Gh A,Xiao Y.Seismic Behavior of Bridge Column Subjected to Various Loading Patterns[R].Berkeley,Peer,2002.
[12]赵国藩.高等钢筋混凝土结构学[M].北京:中国电力出版社,1999.
[13]Priestley M J N,Park R.Strength and ductility of concrete bridge columns under seismic loading[J].ACI Structural Journal,1987,84(8):61-76.
[14]马颖.钢筋混凝土柱地震破坏方式及性能研究[D].大连:大连理工大学,2012.
[2]Cusson D,Paultre P.Stress-strain model for confined high-strength concrete[J].Journal of Structural Engineering,1995,121(3):468-477.
[3]Attard M M,Setunge S.Stress-strain relationship of confined and nnconfined concrete[J].ACI Materials Journal,1996,93(5):432-442.
[4]Park R,Priestley M,et al.Ductility of Square-confined Concrete Columns[J].Journal of the Structural Division,1982,108(4):929-950.
[5]Fafitis A,Shah S.Lateral reinforcement for high-strength concrete columns[J].ACI Special Publication,1985,87:213-232.
[6]Mander J M,Priestley J N,et al.Theoretical stress-strain model for confined concrete[J].Journal of Structural Engineering,1988,114(8):1804-1826.
[7]Hoshikuma J,Kawashima K,et al.Stress-strain model for confined reinforced concrete in bridge piers[J].Journal of Structural Engineering,1997,123(5):624-633.
[8]Razvi S,Saatcioglu M.Confinement model for high-strength concrete[J].Journal of Structural Engineering,1999,125(3):281-289.
[9]钱稼茹,程丽荣.普通箍筋约束混凝土柱的中心受压性能[J].清华大学学报:自然科学版,2002,42(10):1369-1373.
[10]GB50010—2010混凝土结构设计规范[S].
[11]Esmaeily-Gh A,Xiao Y.Seismic Behavior of Bridge Column Subjected to Various Loading Patterns[R].Berkeley,Peer,2002.
[12]赵国藩.高等钢筋混凝土结构学[M].北京:中国电力出版社,1999.
[13]Priestley M J N,Park R.Strength and ductility of concrete bridge columns under seismic loading[J].ACI Structural Journal,1987,84(8):61-76.
[14]马颖.钢筋混凝土柱地震破坏方式及性能研究[D].大连:大连理工大学,2012.
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