三角形加劲肋T-Stub钢节点分流系数与尺寸效应分析
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摘要
本文针对T型连接件(T-stub)带三角形加劲肋与无加劲肋两种构造形式的初始抗拉刚度的相互转换问题,运用了有限元软件ABAQUS研究了150组不同截面几何参数的带三角形加劲肋与无加劲肋T-stub的初始抗拉刚度,提出了适用于求解带三角形加劲肋与无加劲肋T型连接件初始抗拉刚度转换系数的简化计算公式,即力的分流系数;重点考察了腹板横截面与加劲肋横截面面积比、加劲肋高长比和螺栓到腹板距离与加劲肋长度比对分流系数的影响,该拟合公式计算结果与有限元和文献计算结果很吻合,满足精度要求.本文还分析了三角形加劲肋高度、螺栓到腹板距离和试件翼缘尺寸的变化对带三角形加劲肋T-stub初始抗拉刚度和屈服承载力的影响.
In this paper, the mutual conversion of initial tensile stiffness of two types of structural forms with triangular stiffeners and no stiffeners for T type connector(T-stub) is studied, the finite element software ABAQUS was used to study the initial tensile strength of 150 T-stubs with triangular stiffeners and stiffeners with different cross-section geometric parameters. A simplified formula for calculating the initial tensile stiffness conversion coefficient of a T type joint with a triangular stiffener and an unstiffened rib is proposed, that is, the shunt coefficient of the force. The influences of web cross section and stiffener cross section area ratio, stiffener height length ratio, bolt to web distance and stiffener length ratio on the shunt coefficient are mainly investigated. The calculation results of the fitting formula are in good agreement with the finite element and the literature results, and meet the requirements of precision. The influences of the height of the triangle stiffener, the distance between the bolt and the web, and the flange size of the specimen on the initial tensile stiffness and yield bearing capacity of T-stub with triangular stiffener are also analyzed.
In this paper, the mutual conversion of initial tensile stiffness of two types of structural forms with triangular stiffeners and no stiffeners for T type connector(T-stub) is studied, the finite element software ABAQUS was used to study the initial tensile strength of 150 T-stubs with triangular stiffeners and stiffeners with different cross-section geometric parameters. A simplified formula for calculating the initial tensile stiffness conversion coefficient of a T type joint with a triangular stiffener and an unstiffened rib is proposed, that is, the shunt coefficient of the force. The influences of web cross section and stiffener cross section area ratio, stiffener height length ratio, bolt to web distance and stiffener length ratio on the shunt coefficient are mainly investigated. The calculation results of the fitting formula are in good agreement with the finite element and the literature results, and meet the requirements of precision. The influences of the height of the triangle stiffener, the distance between the bolt and the web, and the flange size of the specimen on the initial tensile stiffness and yield bearing capacity of T-stub with triangular stiffener are also analyzed.
引文
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[2]YEE Y L,MELCHERS R E.Moment-rotation curves for bolted connections[J].Journal of Structural Engineering,1986,112(3):615-635.
[3]SHI Y J,CHAN S L,WONG Y L.Modeling for moment-rotation characteristics for end-plate connections[J].Journal of Structural Engineering,1996,122(11):1300-1306.
[4]吴兆旗,张素梅,姜绍飞.梁柱端板连接节点初始转动刚度计算模型[J].工程力学,2009,6:226-232+256.
[5]刘清平,李国强,王静峰.钢结构框架中组合梁等效刚度的确定方法[J].力学季刊,2008,29(4):601-607.
[6]李国强,王静峰.无侧移半刚性连接组合框架的稳定分析:(II)连接转动刚度和算例分析[J].力学季刊,2006,27(4):628-634.
[7]王静峰,李国强.无侧移半刚性连接组合框架的稳定分析:(I)柱的有效长度系数方程[J].力学季刊,2006,27(3):481-488.
[8]李忠学,童根树,严慧.节点连接刚性对门式刚架结构承载能力的影响[J].力学季刊,2001,22(2):234-240.
[9]李美红,王燕,刘秀丽.钢结构梁柱T型连接节点的力学性能分析[J].钢结构,2015,30(4):54-60.
[10]WANG Z Y,TIZANI W,WANG Q Y.Strength and initial stiffness of a blind-bolt connection based on the T-stub model[J].Engineering Structures,2010,32(9):2505-2517.
[11]CHARIS J G,MINAS E L.Influence of equivalent bolt length in finite element modeling of T-stub steel connections[J].Computers and Structures,2003,81(8-11):595-604.
[12]陈士哲.对组件法的修正与改进及其在钢结构节点本构关系研究中的应用[D].广州:华南理工大学,2015.
[13]王素芳,陈以一.T形件连接初始刚度的理论计算模型[J].工业建筑,2007,10:80-83.
[14]STAMATOPOULOS G N,ERMOPOULOS J C.Influence of the T-stub flexibility on its strength[J].International Journal of Steel Structure,2010,10:73-79.
[15]王素芳,陈以一.梁柱端板连接节点的初始刚度计算[J].工程力学,2008,8:109-115.
[16]童根树,赵伟.外伸端板加劲肋对连接性能的影响[J].四川大学学报:工程科学版,2006,4:39-43.
[17]陈骥.钢结构稳定理论与应用[M].北京:科学技术文献出版社,1994.
[18]李文岭.钢框架梁柱弱轴半刚性连接性能研究[D].西安:西安建筑科技大学,2007.
[19]GB 50017-2003.钢结构设计规范[S].北京:中国计划出版社,2003.
[20]赵伟,童根树.外伸端板加劲肋试验和有限元研究[J].土木工程学报,2008,8:22-30.
[21]WILLIAMS M L.Stress singularities resualting from various boundary conditions in angular corners of plates in extension[J].Journal of Applied Mechanics,1952,19(4):526-528.
[22]赵伟,童根树.加劲T形件连接节点试验研究[J].浙江大学学报:工学版,2008,1:66-71.
[23]李美红,王燕,刘秀丽.钢结构梁柱T型连接节点的力学性能分析[J].钢结构,2015,30(4):54-60.
[2]YEE Y L,MELCHERS R E.Moment-rotation curves for bolted connections[J].Journal of Structural Engineering,1986,112(3):615-635.
[3]SHI Y J,CHAN S L,WONG Y L.Modeling for moment-rotation characteristics for end-plate connections[J].Journal of Structural Engineering,1996,122(11):1300-1306.
[4]吴兆旗,张素梅,姜绍飞.梁柱端板连接节点初始转动刚度计算模型[J].工程力学,2009,6:226-232+256.
[5]刘清平,李国强,王静峰.钢结构框架中组合梁等效刚度的确定方法[J].力学季刊,2008,29(4):601-607.
[6]李国强,王静峰.无侧移半刚性连接组合框架的稳定分析:(II)连接转动刚度和算例分析[J].力学季刊,2006,27(4):628-634.
[7]王静峰,李国强.无侧移半刚性连接组合框架的稳定分析:(I)柱的有效长度系数方程[J].力学季刊,2006,27(3):481-488.
[8]李忠学,童根树,严慧.节点连接刚性对门式刚架结构承载能力的影响[J].力学季刊,2001,22(2):234-240.
[9]李美红,王燕,刘秀丽.钢结构梁柱T型连接节点的力学性能分析[J].钢结构,2015,30(4):54-60.
[10]WANG Z Y,TIZANI W,WANG Q Y.Strength and initial stiffness of a blind-bolt connection based on the T-stub model[J].Engineering Structures,2010,32(9):2505-2517.
[11]CHARIS J G,MINAS E L.Influence of equivalent bolt length in finite element modeling of T-stub steel connections[J].Computers and Structures,2003,81(8-11):595-604.
[12]陈士哲.对组件法的修正与改进及其在钢结构节点本构关系研究中的应用[D].广州:华南理工大学,2015.
[13]王素芳,陈以一.T形件连接初始刚度的理论计算模型[J].工业建筑,2007,10:80-83.
[14]STAMATOPOULOS G N,ERMOPOULOS J C.Influence of the T-stub flexibility on its strength[J].International Journal of Steel Structure,2010,10:73-79.
[15]王素芳,陈以一.梁柱端板连接节点的初始刚度计算[J].工程力学,2008,8:109-115.
[16]童根树,赵伟.外伸端板加劲肋对连接性能的影响[J].四川大学学报:工程科学版,2006,4:39-43.
[17]陈骥.钢结构稳定理论与应用[M].北京:科学技术文献出版社,1994.
[18]李文岭.钢框架梁柱弱轴半刚性连接性能研究[D].西安:西安建筑科技大学,2007.
[19]GB 50017-2003.钢结构设计规范[S].北京:中国计划出版社,2003.
[20]赵伟,童根树.外伸端板加劲肋试验和有限元研究[J].土木工程学报,2008,8:22-30.
[21]WILLIAMS M L.Stress singularities resualting from various boundary conditions in angular corners of plates in extension[J].Journal of Applied Mechanics,1952,19(4):526-528.
[22]赵伟,童根树.加劲T形件连接节点试验研究[J].浙江大学学报:工学版,2008,1:66-71.
[23]李美红,王燕,刘秀丽.钢结构梁柱T型连接节点的力学性能分析[J].钢结构,2015,30(4):54-60.