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structural disease 【醫學】臟器病。

structural engineering

With the improvement of loading grade and extension of service year , the structural disease in bridge increases continuously . as a result , the loading capacity of bridge degrades gradually and the function of service deteriorates year by year 隨著交通荷載等級的不斷提高,橋梁服役年限的不斷延長,橋梁結構的病害不斷增多,橋梁結構的承載力不斷降低,使用性能逐年惡化。