【摘要】 本文对于线性应变硬化刚塑性材料构成的矩形截面简支梁在中央集中载荷作用下的载椅——挠度关系进行了研究。文中不仅考虑了应变硬化效应使梁的极限弯矩增大的作用,而且还考虑了由于应变硬化而引起的塑性区的扩展所致的挠度改变对于梁的束载雄力的影响。研究表明:不仅仅材料的应变硬化特性对于梁在屈服后的承载能力有显著的影响,梁的几何特征长细比也对梁在屈服后的承载能力有显著的影响。更多还原

【Abstract】 In this paper, the load-dflection relation for simply supported beam made of linear strain-hardening rigid-plastic material, subjected to concentrated load at middle span, has been investigated. Not only the effect of strain-hardening on increa -sing of ultimate bending moment of the beam but also the effect of deflection change due to extension of plastic region on the load capacity of the beam are considered. The investigation indicates that both the strain-hardening property of material as well as the slenderness ratio of beam have significant effect on the postyielding load capacity of the beam.更多还原