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NON-LINEAR ANALYSIS OF CONCRETE BEAM-COLUMN ASSEMBLIES REINFORCED WITH FINE GRAINED HIGH STRENGTH STEEL BARS
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摘要: 为了能对这种细晶钢筋增强混凝土结构的抗震性能有较为准确的定量分析,采用ANSYS有限元软件对十字形梁柱组合件进行了受力全过程的非线性有限元分析,并将分析结果与试验结果进行对比,从而进一步了解细晶高强钢筋混凝土梁柱组合件在反复荷载下的受力性能特点。有限元分析所得裂缝分布、钢筋应力分布以及梁端力-位移曲线反映出,高强钢筋混凝土框架梁柱组合件在低周反复荷载作用下梁端塑性铰区裂缝开展充分,钢筋应力最大,核芯区内钢筋未发生粘结破坏。有限元分析结果较好的描述了试件的受力特点和过程。Abstract: In order to quantitatively analyze the aseismatic performance of this kind of beam-column assemblies through whole loading history,the non-linear FE analyses of the cross beam-column specimens were carried out by ANSYS.Compared to the experimental results,the finite element analyses cast a further light upon the characteristics of this beam-column assembly while being subject to cyclic reverse loading.Cracking patterns,streel bars's stress distribution and force-displacement curves at beams ends resulted from the experiments indicate that at location of plastic hinge area the main cracks developed sufficiently and the stress of steel bars was peak values,and no bonding failure of steel bars is found within core region of assemblies.It is noticed that the results of finite element analysis of the specimens can properly depict the characteristics and process under loading.
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张继文,蒋朝文.细晶高强钢筋混凝土梁柱组合体抗震性能试验研究[J].工业建筑,2009,39(11):33-39. [2] 过镇海.混凝土的强度和变形实验基础和本构关系[M].北京:清华大学出版社,1997. [3] 蓝宗建,梁书亭,孟少平.混凝土结构设计原理[M].南京:东南大学出版社,2002. [4] 唐九如.钢筋混凝土框架节点抗震[M].南京:东南大学出版社,1989. [5] 吕西林,郭子雄,王亚勇.RC框架梁柱组合件抗震性能试验研究.建筑结构学报,2001,22(1):2-7. [6] 郭子雄,周素琴.RC框架节点的弯矩-滑移转角恢复力模型[J].地震工程与工程振动,2003,23(6):120-126. [7] 陈永春,高红旗,马颖军,等.反复荷载下钢筋混凝土平面框架梁柱节点受剪承载力及梁筋粘结锚固性能的实验研究[J].建筑科学,1995(1):3-11. -
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