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空心板、T梁和箱梁桥,在公路上应用甚广。为了方便这类简支梁直桥在车辆荷载下最大弯矩的计算,本文通过对大量桥例进行的有限条法分析,绘制了一系列设计曲线。利用这些曲线和相应的简单算式,设计者无需用通常方法作荷载横向分布系数的计算而能快速地确定上述截面形式简支梁桥在汽车荷载下的最大弯矩。此法适合在中、小跨径桥的设计中采用。
Hollow slabs, T-beams and box girders are widely used on the road. In order to facilitate the calculation of the maximum bending moment of such simple supported beam under the vehicle load, this paper draws a series of design curves through the finite strip analysis of a large number of bridges. Using these curves and the corresponding simple equations, designers can quickly determine the maximum moment under the vehicle load for the above-mentioned cross-sectioned simply supported girder bridge without the usual method of calculating the lateral distribution coefficient of the load. This method is suitable for medium and small span bridge design.