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一、概述钢筋混凝土连续梁在荷载作用下,由于材料的非弹性变形、裂缝出现和开展,各截面的刚度在各受力阶段不断变化,尤其是塑性铰的形成和发展,明显地使其内力区别于按弹性理论所计算的内力,这种刚度随荷载变化所引起的内力变化,一般称为钢筋混凝土连续梁的塑性内力重分布。钢筋混凝土连续梁考虑塑性内力重分布的计算方法,目前主要有“变刚度法”、“塑
I. Overview of reinforced concrete continuous beam under load, due to the non-elastic deformation of the material, the appearance and development of cracks, the stiffness of each section constantly changing in the various stages of the force, especially the formation and development of plastic hinge, obviously to the internal force Different from the internal force calculated by the elastic theory, the variation of the internal force caused by the change of the stiffness with the load is generally called the redistribution of the internal force of the reinforced concrete continuous beam. The calculation method for the redistribution of internal forces of reinforced concrete continuous beams is mainly ”variable stiffness method“ and ”plastic" at present.