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在挠曲线计算中,采用荷载D的准确值按式(1)确定。式中:M和Q相应于跨度为L、荷载为q(x)的铰支单跨梁的弯矩和切力;x为左支承到计算截面的距离。对于某些荷载分布图的D值,引用有关参考书,例如手册[1]中表11-1所列的公式。由式(1)得:某些荷载组合的D值不等于所有计算截面荷载D值的总和。因此,在任何情况下,当荷载图与引用的表1、2不同时,必须直接按式(1)来确定D值。在一些情况下,适合采用维里萨金法。由某些D值为已知的较简单荷载组成的复杂荷载图,D值的积分能够大大地简化。
In the calculation of the deflection curve, the exact value of the load D is determined according to equation (1). In the formula: M and Q correspond to bending moments and shear forces of a hinged single span beam with a span of L and a load of q(x); x is the distance from the left bearing to the calculated section. For the D values of some load profiles, reference the relevant reference book, for example the formula listed in Table 11-1 in the manual [1]. From equation (1), the D value of some load combinations is not equal to the sum of the D values of all calculated cross-section loads. Therefore, in any case, when the load map is different from the quoted tables 1, 2, the D value must be determined directly according to equation (1). In some cases, the Veriza gold method is suitable. With complex load maps that consist of some simpler loads with known D values, the integration of D values can be greatly simplified.