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钢筋混凝土圆形构件正截面承载力的图算法

Keywords: 桥梁工程,钢筋混凝土圆形构件,图算法,非线性分析,弹塑性

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Abstract:

?为了解决中国规范方法在计算钢筋混凝土圆形构件正截面承载能力时使用不方便,以及因简化带来一定误差的问题,推导了一种实用计算方法。基于承载力极限状态的5个应变区域,以应变为自变量,无需迭代,由平衡条件推导了由变形求解内力的逆解方法。该法考虑了完整的抛物线加矩形的混凝土应力-应变关系和理想弹塑性的钢筋本构关系,并采用图算法得到从拉到压的量纲为1的弯矩-轴力诺模图。结果表明:该诺模图使用简单,计算结果与中国现行规范符合良好。

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