T形钢管混凝土柱荷载-位移骨架曲线模型
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摘要
文章采用有限元分析软件ABAQUS对T形钢管混凝土柱的抗震性能进行了数值分析,基于低周反复荷载作用下有限元计算的荷载-位移滞回曲线,得出了T形钢管混凝土柱的荷载-位移骨架曲线,通过对有限元计算结果进行回归分析,提出了T形钢管混凝土柱荷载-位移骨架曲线模型,充分考虑了轴压比、套箍系数、长细比对骨架曲线的影响,推导了模型参数(弹性阶段刚度、屈服荷载、强化阶段刚度)计算表达式,并引入修正系数η对弹性阶段刚度进行修正,最后将模型计算结果与有限元计算结果进行了对比。分析结果表明:弹性阶段刚度有限元计算值偏大,经修正误差控制在一定范围内;轴压比、套箍系数、长细比对屈服荷载和强化阶段刚度影响较大;模型计算结果与有限元计算结果吻合较好,该模型具有一定的计算精度和应用价值,可为后续研究提供参考。
By using finite element analysis software ABAQUS,the non-linear analysis of seismic performance of T-shaped concrete-filled steel tubular columns is made.Based on the load-displacement hysteresis curves obtained by the finite element calculation under the low cyclic reversed loading,the load-displacement skeleton curves of T-shaped concrete-filled steel tubular columns are obtained.By the regression analysis based on the finite element calculation results,the load-displacement skeleton curve model considering the influence of axial compression ratio,confinement coefficient and slenderness ratio on skeleton curves is put forward,and the calculation expressions of model parameters including elastic stiffness,yield load and stiffness in the strengthening stage are derived.The correction factorηis introduced to revise elastic stiffness,then the model calculation results and the finite element calculation results are compared.The results are as follows:the elastic stiffness finite element calculation value is larger,the correction error is controlled in a certain range;the axial compression ratio,confinement coefficient and slenderness ratio have greater influence on yield load and stiffness in the strengthening stage;the model calculation results agree well with the finite element calculation results,the model has certain calculation precision and application value,and provides a good reference for the seismic design of T-shaped concrete-filled steel tubular column.
By using finite element analysis software ABAQUS,the non-linear analysis of seismic performance of T-shaped concrete-filled steel tubular columns is made.Based on the load-displacement hysteresis curves obtained by the finite element calculation under the low cyclic reversed loading,the load-displacement skeleton curves of T-shaped concrete-filled steel tubular columns are obtained.By the regression analysis based on the finite element calculation results,the load-displacement skeleton curve model considering the influence of axial compression ratio,confinement coefficient and slenderness ratio on skeleton curves is put forward,and the calculation expressions of model parameters including elastic stiffness,yield load and stiffness in the strengthening stage are derived.The correction factorηis introduced to revise elastic stiffness,then the model calculation results and the finite element calculation results are compared.The results are as follows:the elastic stiffness finite element calculation value is larger,the correction error is controlled in a certain range;the axial compression ratio,confinement coefficient and slenderness ratio have greater influence on yield load and stiffness in the strengthening stage;the model calculation results agree well with the finite element calculation results,the model has certain calculation precision and application value,and provides a good reference for the seismic design of T-shaped concrete-filled steel tubular column.
引文
[1]刁波,李淑春,叶英华.反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究[J].建筑结构学报,2008,29(1):57-63.
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[7]赵忠虎.压弯构件恢复力模型骨架曲线的研究[J].工业建筑,2007,15(9):73-76.
[8]张继承,沈祖炎,周海军.L形钢管混凝土柱抗震性能非线性有限元分析[J].工业建筑,2010,15(7):85-90.
[9]李芹芹.L形钢管混凝土组合柱抗震性能有限元分析[D].武汉:武汉大学,2010.
[10]吴童,柳炳康,周安,等.低周反复荷载下再生混凝土框架边节点受力性能试验研究[J].合肥工业大学学报:自然科学版,2012,35(1):82-85.
[11]金雪峰,张学文,蔡健.方形钢管混凝土轴压柱局部屈曲性能的研究[J].合肥工业大学学报:自然科学版,2007,30(7):885-887.
[12]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2004:268-304.
[13]European Committee for Standardization.Euro-code 4:design of composite steel and concrete structures,part1.1:general rules and rules for buildings[S].Brussels,Belgium:European Committee for Standard Institutions,1994.
[2]游经团,韩林海.钢管高性能混凝土压弯构件滞回性能试验研究[J].地震工程与工程振动,2005,25(3):98-103.
[3]韩林海,杨有福.现代钢管混凝土结构技术[M].第2版.北京:中国建筑工业出版社,2007:244-307.
[4]钟善桐.钢管混凝土结构[M].第3版.北京:清华大学出版社,2003;186-201.
[5]张凤亮.空心圆钢管混凝土压弯构件骨架曲线和延性系数的研究[D].哈尔滨:哈尔滨工业大学,2008.
[6]孙修礼,梁书亭,段友利.钢管混凝土框架曲线研究[J].地震工程与工程振动,2007,27(1):99-103.
[7]赵忠虎.压弯构件恢复力模型骨架曲线的研究[J].工业建筑,2007,15(9):73-76.
[8]张继承,沈祖炎,周海军.L形钢管混凝土柱抗震性能非线性有限元分析[J].工业建筑,2010,15(7):85-90.
[9]李芹芹.L形钢管混凝土组合柱抗震性能有限元分析[D].武汉:武汉大学,2010.
[10]吴童,柳炳康,周安,等.低周反复荷载下再生混凝土框架边节点受力性能试验研究[J].合肥工业大学学报:自然科学版,2012,35(1):82-85.
[11]金雪峰,张学文,蔡健.方形钢管混凝土轴压柱局部屈曲性能的研究[J].合肥工业大学学报:自然科学版,2007,30(7):885-887.
[12]韩林海.钢管混凝土结构:理论与实践[M].北京:科学出版社,2004:268-304.
[13]European Committee for Standardization.Euro-code 4:design of composite steel and concrete structures,part1.1:general rules and rules for buildings[S].Brussels,Belgium:European Committee for Standard Institutions,1994.
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