【摘要】 为模拟地震作用时杆件在变动轴力和双向弯曲的耦合特点,基于简化纤维模型的多弹簧单元模型近年被广泛应用。本文作者在相关论文中提出了考虑剪切变形弹塑性刚度影响的多弹簧模型空间梁柱单元,杆件的计算模拟精度除了取决于单元模型之外,还决定于两个重要参数:弹簧位置及个数布置、塑性区长度,本文将针对其进行参数分析并提出合理建议取值。本文最后还提出了模拟杆件残余应力的合理弹簧布置方式。更多还原

【Abstract】 To simulate the coupling behavior of member subjected to variable axial force and bi-bending,the multi-spring model is applied widely.Author has presented an improved model which considering the plastic stiff influence of plastic-region shear deformation in other paper.The simulation precision not only depends on the element model but also closely relates to two important parameters: the layout of spring and length of plastic region.Paper focuses on the two parameter analysis and puts forward reasonable suggestions.At last,paper also offers the appropriate spring layout to simulate the residual stress.更多还原