梁柱纤维模型在异形截面构件分析中的适用范围
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摘要
选取剪跨比和肢高厚比这2个影响异形柱剪切效应的主要参量,在构件层次上以纤维模型梁柱单元和实体有限元模型得出的柱顶侧移误差为依据,对处于弹性阶段的L形、T形和十形柱分别基于不考虑和考虑剪切效应影响纤维模型分析的适用性进行了定量探讨,验证加入剪切效应影响纤维模型分析异形柱的正确性,并给出异形柱适用考虑剪切纤维模型梁柱单元分析的适用范围。
The span ratio and the ratio of section height to section thickness of column leg are selected,which mainly influence the shear effect of special-shaped columns.Based on error analysis of the displacement at the tip of the columns,the flexibility of a fiber model for L-shaped columns,T-shaped columns,and cross-shaped columns in the range of elasticity is studied.The columns are studied with and without shear effect.The correctness of the fiber model with the shear effect is shown,and the applicable range of the fiber model with the shear effect is presented.
The span ratio and the ratio of section height to section thickness of column leg are selected,which mainly influence the shear effect of special-shaped columns.Based on error analysis of the displacement at the tip of the columns,the flexibility of a fiber model for L-shaped columns,T-shaped columns,and cross-shaped columns in the range of elasticity is studied.The columns are studied with and without shear effect.The correctness of the fiber model with the shear effect is shown,and the applicable range of the fiber model with the shear effect is presented.
引文
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[2]杨溥,唐剑,陈名弟.钢筋砼异形柱在不同加载方向的受力性能分析[J].重庆大学学报:自然科学版,2005,28(8):17-21.YANG PU,TANG JIAN,CHEN MING-DI.Analysis onseismic capacity for RC specially shaped columns indifferent horizontal direction[J].Journal of ChongqingUniversity:Natural Science Edition,2005,28(8):17-21.
[3]陈滔,黄宗明.基于有限单元柔度法的钢筋混凝土空间框架非弹性地震反应分析[J].建筑结构学报,2004,25(2):79-84.CHEN TAO,HUANG ZONG-MING.Flexibilitybased finite element method for inelastic seismicresponse analysis of reinforced concrete spaceframes[J].Journal of Building Structures,2004,25(2):79-84.
[4]黄宗明,陈滔.基于有限单元柔度法和刚度法的非线性梁柱单元比较研究[J].工程力学,2003,20(5):24-31.HUANG ZONG-MING,CHEN TAO.Comparisonbetween flexibility-based and stiffenss-based nonlinearbeam-column flements[J].Engineering Mechanics,2003,20(5):24-31.
[5]陈娟,陈滔,黄宗明.钢筋混凝土L形柱分析时平截面假定的适用范围[J].地震工程与工程振动,2006,26(1):111-115.CHEN JUAN,CHEN TAO,HUANG ZONG-MING.Applicable range of plane-section assumption in analysis ofL-shaped RC columns[J].Journal of EarthquakeEngineering and Engineering Vibration,2006,26(1):111-115.
[6]王文渊,王森林,李立华.剪跨比对异形柱受力性能影响初探[J].河北农业大学学报,2001,24(4):79-82.WANG WEN-YUAN,WANG SEN-LIN,LI LI-HUA.The influence of shear-span ratio on thebehavior of special-shaped columns[J].Journal ofAgricultural University of Hebei,2001,24(4):79-82.
[7]胡晓斌,黄宗明,陈名弟.钢筋混凝土异形柱平截面假定适用性初探[J].重庆建筑大学学报,2004,26(3):26-31.HU XIAO-BIN,HUANG ZONG-MING,CHEN MING-DI.Primary study of applicability of plane-sectionassumption of shaped RC columns[J].Journal ofChongqing Architecture University,2004,26(3):26-31.
[8]陈娟.双向弯曲作用下钢筋混凝土L形柱的抗震性能研究[D].重庆:重庆大学硕士学位论文,2005.
[9]RANZO G,PETRANGELI M.A fiber beam elementwith section shear modeling for seismic analysis of RCstructures[J].Journal of Earthquake Engineering,1998,2(3):443-473.
[10]PETRANGELI M,PINTO P E,CIAMPI V.Fiberelement for cyclic bending and shear of RC structures:I theory[J].Journal of Engineering Mechanics,1999,125(9):994-1001.
[11]CERSEA P,PETRINI L,PINHO R.Flexure-shear fiberbeam-column elements for modeling frame structures underseismic loading-state of the art[J].Journal of EarthquakeEngineering,2007,11(1):46-88.
[12]WANG B,XUE G Y,ZHAO H T.Analysis of flangeeffect on shear bearing capacity of special shapedcolumns[J].Journal of Architecture,2006,27(2):283-285.
[13]ElMANDOOH G K,GHOBARAH A.Flexural andshear hysteretic behaviour of reinforced concretecolumns with variable axial load[J].EngineeringStructures,2003,25(11):1353-1367.
[14]WARNER R F.Biaxial moment trust curvationrelations[J].Journal of Structural Division(ASCE),1969,95(5):923-940.
[15]中华人民共和国行业标准.JGJ 149-2006混凝土异形柱结构技术规程[S].北京:中国建筑工业出版社,2006.
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