谢 凡, 沈蒲生. 钢筋混凝土剪力墙多垂直杆单元模型力学性质分析及其改进[J]. 工程力学, 2010, 27(6): 77-082.
引用本文: 谢 凡, 沈蒲生. 钢筋混凝土剪力墙多垂直杆单元模型力学性质分析及其改进[J]. 工程力学, 2010, 27(6): 77-082.
XIE Fan, SHEN Pu-sheng. MECHANICAL ANALYSIS OF MULTI-VERTICAL-LINE-ELEMENT MODEL OF RC SHEAR-WALLS AND ITS IMPROVEMENT[J]. Engineering Mechanics, 2010, 27(6): 77-082.
Citation: XIE Fan, SHEN Pu-sheng. MECHANICAL ANALYSIS OF MULTI-VERTICAL-LINE-ELEMENT MODEL OF RC SHEAR-WALLS AND ITS IMPROVEMENT[J]. Engineering Mechanics, 2010, 27(6): 77-082.

钢筋混凝土剪力墙多垂直杆单元模型力学性质分析及其改进

MECHANICAL ANALYSIS OF MULTI-VERTICAL-LINE-ELEMENT MODEL OF RC SHEAR-WALLS AND ITS IMPROVEMENT

  • 摘要: 分析了多垂直杆单元的力学性质,证明了与之等效的梁单元的转角和横向位移的位移函数均为一次式,且该梁单元在求弯曲横向位移时,需采用1节点数值积分。讨论了多垂直杆单元模型转动中心c值的含义,认为c值反映了数值积分的求积节点或假设剪切应变插值点的变化,会对单元的刚度产生影响,并对c值的取值范围提出了合理建议。提出了竖向弹簧布置的改进方式,按高斯点布置代替均布方式时,能够用较少的弹簧得到更为精确的结果,提高了计算速度。最后,从横向位移模式和剪应力不均匀分布两个方面提出了改进多垂直杆单元模型的新构想。

     

    Abstract: The mechanical property of Multi-vertical-line-element model is analyzed. For the beam element whose behavior can be simulated with the multi-vertical-line-element model, the functions of rotation angle and lateral displacement are proved to be linear. To obtain the bending lateral displacement, one node numerical integration should be adopted. The meaning of c, the center of rotation of the Multi-vertical-line-element model, is discussed. It is figured out that the value of c reflects the variation of quadrature nodes and the influences of the element stiffness. Improved modes for the arrangements of vertical spring are put forward. Calculation efficiency is imporved if the springs are arranged at Gauss points rather than uniformaly. Finally, new idea to improve the model is presented.

     

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