摘要
采用精确的有限元非线性分析方法对小高跨比单层单跨实腹门式刚架的平面内弹性整体稳定性进行了大量的参数分析,指出在梁上均布荷载作用下,当柱梁高跨比小于某一数值时,一般不发生传统理论所认为的反对称失稳模式,而是以对称失稳模式为主。给出了修正的柱计算长度系数,并与规范给出的数值进行了对比,认为这种对称失稳模式更不利于门式刚架的整体稳定,应该引起足够的重视。
The parametric analyses to global in-plane buckling of portal rigid frames with small height-span ratio are carried out by using the non-linear finite element analysis. The results of analysis indicate that the buckling mode of portal rigid frames with height-span ratio less than a certain value and under the uniformload, is the symmetric, not the usual accepted sides-way anti-sym-metric, Basing on this buckling mode, the updated effective length factors are given and the comparison with the Chinese Code for Design of Steel Structures are also provided,
出处
《房材与应用》
2005年第4期4-7,20,共5页
Housing Materials & Applications
