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为了掌握组合斜拉桥主梁混凝土桥面板在轴向力和弯矩共同作用下有效宽度系数沿跨长方向的分布规律,进行了空间有限元计算,提出了斜拉索水平轴向力作用下混凝土桥面板有效宽度系数沿跨长方向分布曲线计算公式。同时,通过理论分析得出了弯矩作用下混凝土桥面板有效宽度系数计算方法。研究结果表明:斜拉索水平轴向力在混凝土桥面板中的传递角度可取28°;综合考虑轴力和弯矩复合作用的有效宽度系数实用计算方法,能够准确反映组合斜拉桥混凝土板的应力状态,对保证结构安全、改进设计方法具有重要参考价值。
In order to grasp the distribution law of the effective width coefficient along the long-span direction of the concrete deck of composite cable-stayed bridge under axial force and bending moment, the finite element method is used to calculate the effect of horizontal axial force of the stay cable Concrete bridge deck effective width coefficient along the length of the distribution curve formula. At the same time, the calculation method of effective width coefficient of concrete bridge deck under bending moment is obtained through theoretical analysis. The results show that the horizontal axial force of the stay cable can be taken as 28 ° in the concrete bridge deck. The practical calculation method of the effective width coefficient based on the combined action of axial force and bending moment can accurately reflect the concrete slab Stress state, to ensure structural safety, improve the design method has important reference value.