均布荷载作用下连续梁的跨差与弯矩的变化关系探讨

On Connection of Variance Between Span D-value and Moment of Continuous Beam Under Uniformly-distributed Load

在设计中当等截面连续梁的计算跨度相差不超过10%时,可用等跨的图表来进行内力计算.针对这一问题,对于均布荷载作用的情况,采用弹性理论计算方法,对跨差达到20%范围内的弯矩进行分析,并结合可变荷载与永久荷载比值的范围,用计算数据说明,正截面设计中可在更大的范围内采用等跨的图表进行计算.

When actual span D-value of equal section continuous beam in designs is less 10%, equal span chart is employed to calculate internal force. Under uniformly-distributed load circumstances, the calculating method of elasticity theory is used to analyze the moment whose span D-value reaches 20%. Within the rate range of live load, constant load and calculation data illustrate that equal span chart can be used in normal section design within a greater scope.