The vertical loaded free frequencies for the different span simply supported beam Bridges are investigated with the vehicle bridge system model.

采用车-桥系统相互作用的计算模型，对不同跨度简支梁桥的竖向有载自振频率进行了深入研究。

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Owing to consistent bridge span forms, similar sections and unified structures, simply supported girder bridges have been widely applied in the high speed railway.

简支梁桥以其桥跨外形一致、截面相同、构造布置统一的优点在高速铁路中得到了广泛的应用。

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