边中跨比对山区大跨连续刚构桥的受力影响研究

文章采用位移法推导出连续刚构桥模型的截面弯矩和梁端转角公式,比较了不同参数取值下模型的内力变化,并结合工程实例,从结构受力的角度分析了连续刚构桥的边中跨比与其墩梁内力、梁端转角及挠度之间的关系,对同类桥梁的边中跨比取值提出了合理的建议。

Study on the Stress Impact of Side-to-middle Span Ratio on Large-span Continuous Rigid Frame Bridge in Mountain Areas

The article used the displacement method to derive the cross-sectional bending moment and beam end rotation formula of continuous rigid frame bridge model,compared the change of internal force for this model under different parameter values,and in combination with the practical engineering examples,it analyzed the relationship among the side-to-middle span ratio of continuous rigid frame bridge,the internal force of its pier beam,the beam-end rotation,and the deflection from the perspective of structural stress,and proposed the reasonable suggestions for the value taking of side-to-middle span ration in the same type of bridges.