【摘要】 以基本的力学理论为依据,对双筋矩形截面混凝土墩柱的受力模式进行简化,通过力学平衡方程,从理论上分析了墩柱受力过程中开裂区域的刚度。在此基础上,引入了三段式的概念,并通过三段式思想推算出截面刚度的简化公式。根据简化公式计算出力-位移曲线,继而推算出混凝土墩柱整体刚度。更多还原

【Abstract】 According to the theory of the fundamental mechanics,this paper simplifies the mechanical mode of the bi-bar reinforced rectangular concrete bridge pier,and through the mechanical balance equation,conducts the theoretical analysis of cracking stiffness of the pier during the stress process.On this basis,by introducing the concept "three-stage",a simplified formula used to calculate stiffness of cross section was derived.In term of the simplified formula force-displacement curve and the stiffness of whole concrete pier were calculated.更多还原