支点加固梁弹性支承刚度的选择与最大承载力计算

The support rigidity option and greatest bearing capacity calculation of continuous beam with elastic support reinforcement

应用结构力学和混凝土结构的理论,分析了具有弹性支点的两跨连续梁的内力,并提出了采用弹性支承加固简支梁时的最佳刚度的概念.通过分析得出了被加固梁最佳支承刚度的计算方法,以及与其对应的最大承载力的计算方法.实例计算分析给出了不同K值时两跨连续梁承载力的变化曲线,并说明当选择最佳支承刚度时,可使被加固梁的承载力最大.

The internal force of continuous beam with elastic middle support is analyzed through the theories of structural mechanics and concrete structure; and a new concept of the optimum support rigidity is proposed when applying the elastic support to reinforce the simply supported beam. This paper gives a method of calculating the optimum support rigidity of the reinforced beam and calculating the corresponding greatest bearing capacity. This paper also gets the varied curve of continuous beam＇s bearing capacity in a series of value K, and illustrates that, when choosing the optimum support rigidity, the bearing capacity of reinforcecd beam will be the greatest.