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一、前言在欧洲,根据罗素所提出的梁模拟法来进行牛腿设计已有几十年了。1961年尼氏根据由两根杆件组成的简单桁架模拟法做设计,并提出主钢筋视为水平受拉杆,而将混凝土视为受压斜杆。孟氏及费氏提出根据静不定体系,利用改进的桁架模式其水平主钢筋及斜箍筋均视为受拉杆件。作者采用最小变形能量准则,研究分析了这三种模式,得出的结论是,简单静定桁架模式具有的变形能量最小;其结果是,只有这种模式能较好地使理论与实际一致。
I. INTRODUCTION In Europe, it has been decades to design a cow leg based on the beam simulation proposed by Russell. In 1961, Nieder’s design was based on a simple truss simulation consisting of two rods and proposed that the main reinforcement be regarded as a horizontal tension rod and the concrete as a compression diagonal rod. Monteggia and Fisher proposed that the horizontal main reinforcement and stirrups should be regarded as tension members by the improved truss mode according to the static system. Using the minimum deformation energy criterion, the authors studied and analyzed the three models and concluded that the simplest-steady-state truss model has the least amount of deformation energy; as a result, only this model can better make the theory consistent with reality.