论文部分内容阅读
本文提出钢框架二阶弹塑性分析的简化塑性区法。它可以考虑轴力的Ｐ－Ｄｅｌｔａ效应、残余应力、横截面刚度退化和塑性区长度等几何和材料非线性因素的影响。该法既弥补了经典塑性铰法不能考虑横截面刚度退化和塑性区长度影响的不足，又克服了塑性区法单元划分过多，因而多占计算机内存和花费机时的缺陷。计算分析表明，其结果令人满意。
This paper presents a simplified plastic zone method for second-order elasto-plastic analysis of steel frames. It can take into account the effects of nonlinear factors such as the P-Delta effect of the axial force, residual stress, cross-sectional stiffness degradation, and plastic zone length. This method not only compensates for the inability of the classic plastic hinge method to consider cross-sectional stiffness degradation and the influence of the length of the plastic zone, but also overcomes the deficiencies of the plastic zone method unit that divides too much and thus accounts for the computer memory and the cost of the machine. The calculation and analysis show that the results are satisfactory.