钢框架梁柱非线性分析中的一种新单元  

A New Element for Nonlinear Analysis of Beam-column of Steel Frame Structures

作　　者：庄和星[1] 宋启根[1] 吕令毅[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《建筑结构》2005年第8期64-65,7,共3页Building Structure

摘　　要：为避免稳定函数单元在轴力为拉、零、压时单元刚度矩阵表达式不一致,提出了MEP单元。单元是以满足约束条件及最小势能原理来构造的。计算结果表明,由MEP单元导出的挠度和刚度系数具有较高的精度。该单元方便应用于变截面及弹塑性梁柱结构中。In order to avoid the difference of stiffness matrix of stable function element, the MEP element is proposed for nonlinear analysis of steel frame structures. The formulation of the element is based on the imposition of compatibility conditions at the end nodes as well as the principle of minimum potential energy. It is shown that the accuracy of deflection and stiffness coefficient is considerably high for steel frame structures.

关 键 词：钢框架梁柱 建筑结构 非线性分析 割线刚度 切线刚度 MEP单元 

分 类 号：TU378.3[建筑科学—结构工程]