• 使用性 - 引用次数：2

  However, the pedestrian overcrossings' burthen has been gradually increasing because of rapid development of urban construction and steady expanding of population. The structures have been exposing outside and whether its current useability satisfies design demand is unknown.

  然而,随着城市建设的迅猛发展和人口的日益扩张,钢结构人行天桥的负荷程度日益增加,且长期暴露在外,在使用一定年限后,其使用性是否满足设计要求尚不得而知。

  参考来源 - 钢结构人行天桥使用性评估

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