钢筋混凝土平板-异形柱板柱节点抗扭构件刚度研究

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发布时间：2021-09-13

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钢筋混凝土平板-异形柱板柱节点
抗扭构件刚度研究
李光星蔡健王霖黄炎生
(广州市设计院广州 510620) (华南理工大学土木工程系广州 510640)
摘要;在钢筋混凝土平板-矩形柱板柱节点抗扭构件的刚度理论基础上,针对钢筋混凝土平板-异形
柱板柱节点的特点,通过提出有效抗扭截面的概念来考虑异形柱柱肢的抗扭作用,根据抗扭构件的刚度变化
假定抗扭构件线扭矩呈双折线分布,推导出弹性状态下抗扭构件的刚度计算公式。然后运用有限元程序
ANSYS分析确定了异形柱柱肢参与抵抗扭矩的有效柱肢范围和对不同参数下抗扭构件的刚度进行评价。分
析结果表明,距平板底面各1倍平板厚度h的异形柱柱肢范围是参与抗扭的有效范围;在评价抗扭构件刚度
方面,随着参数的变化有限元分析和计算公式的结果及变化趋势较吻合。抗扭构件的刚度计算公式可应用
于钢筋混凝土平板-异形柱板柱结构体系的等效柱理论分析。
关键词:平板-异形柱节点抗扭构件刚度有限元
STUDY ON RIGIDITY OF TRANSVERSE TORSION MEMBER OF REINFORCED
CONCRETE FLAT PLATE-SPECIAL-SHAPED COLUMN CONNECTION
(Guangzhou Design Institute Guangzhou 510620)Li Guangxing
(Department of Civil Enginecring,South China University of Technology Guangzhou 510640)Cai Jian Wang Lin Hoang Yunsheng
Abstract:The effective tonion section is puit forwand toreflect the torsion action of the calumn limb based on the rigidity
theory of transverse tonion member of reinforced concicte flat plate-rectangular columin connection and aimed at the
churacteristic of the reinforced concrete flat plate-epocial-shaped column conmection,Because the rigidity of the transvere
tonsion member is various,the hypothesis is made that the linear torison along transverse torsion member is distributed in two
diferent slant lines.The theory expresion of transiene torion member is derived.By the finite element procedure ANSYS,
the effective range of the special-shaped colunn limb contributed to the tonsion rigidity is confimed and the rigidities of
transvense torsion membens are evaluated acconling to diferent fartors.The analysis result also shows that the height of the
efective column linb is epual to the thickmess of the fat plate.The Lrends of rigidiies obtained by the finite element method
agree well with those of the theory expression method.The theory expression of trunsvense tonsion member can he applied to
equivalent colamn method to amalyze the behavior of meinforced concrete lat plate-special-shaped eolumn sdnuctural system.
Keywords:flat plate-special-shaped column connection transverse torsion member rigidity finite element
较小14.5j。文献[6]针对我国规范”的等代框架法在
0前言进行板柱结构体系分析当中存在的竖向荷载与水平
在水平和竖直荷载作用下,钢筋混凝土板柱结荷载下计算模式不统一的问题,提出了采用等效柱
构体系的受力分析可以通过等效柱方法将三维结构方法来考虑柱子的刚度折减,应用于承受竖向荷载
体系转换为平面等代框架进行分析计算[1-)。所谓和水平荷载作用下的板柱结构分析,使得板柱结构
等效柱是指这样一种结构构件:它包括楼板上下的
柱子和垂直于受力方向的柱子两侧的抗扭构件。等第一作者:李光星男 1972年12月出生博国家一注册结
效柱的抗弯刚度是在考虑了抗扭构件扭转角的影响构师
并根据节点转角等效的条件而获得的,与不考虑抗E-mail:ligusngxing@gadi.com
扭构件扭转角影响的柱子相比,等效柱的抗弯刚度收模日期:2006-10-24