【摘要】 在已证明三竖直线单元（Ｔｈｒｅｅ—ｖｅｒｔｉｃａｌ—ｌｉｎｅ ｅｌｅｍｅｎｔ）和多竖直线单元（Ｍｕｌｔｉｐｌｅ—ｖｅｒｔｉｃａｌ—ｌｉｎｅｅｌｅｍｅｎｔ）本质上为铁木辛哥分层梁单元（这里称之为扩展铁木辛哥分层梁单元）的基础上，本文进一步讨论这一单元模型。首先推导了单元刚度矩阵和内力表达式；然后讨论单元分别模拟轴向－弯曲和剪切滞变特性的理论根据；其次，根据试验结果，改进了Ｋａｂｅｙａｓａｗａ提出的层拉－压滞变模型；最后给出计算实例。更多还原

【Abstract】 It has been shown that three-vertical-line element and multiple-vertical-line element are essentially a kind of Timoshenko layered beam element (here it is called extended Timoshenko layered beam element). In this paper the element model is discussed further. First, the element stiffness matrix and inner force formula are presented, then the performance of modeling the axial-bending and shear is discussed; next the improvement suggestions to Kabeyasawa’s tension-compress hysteretic curve are proposed, based on experiment results; finally, two analysis examples show the effectiveness of the model.更多还原