等级 1.(按质量、程度、地位等的差异而作出的区别) grade; rank 薪金等级 pay grade; 牛奶是分等级出售的。 milk is sold in grades.2.(在社会地位和法律地位上不平等的社会集团) order and degree; social estate; social stratum 封建社会等级森严。 feudal society was rigidly stratified
As a result , it is an urgent engineering problem to determine load level on asphalt pavements scientificly and to research ultimate state design method of asphalt pavement structures 因此,科学地确定沥青路面结构荷载等级,研究沥青路面结构极限状态设计方法成为工程中迫切需要解决的问题。
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 随着交通荷载等级的不断提高,桥梁服役年限的不断延长,桥梁结构的病害不断增多,桥梁结构的承载力不断降低,使用性能逐年恶化。
Because traffic flow greatly increases in recent years and the rank of actual driving load enhances , causing this bridge to be at the excess load the service condition , so in order to guarantee the bridge ' s transport security , the main body structure of the bridge should be reinforced 摘要长沙市八一路跨线桥由于近年来交通流量大增,实际行车荷载等级提高,使得该桥处于超负荷的营运状态,为了保证大桥营运安全,需要对此桥的主体结构进行加固,在选择加固方案时对比了三种加固方法:钢混凝土组合结构加固方法、混凝土结构扩大截面加固方法、粘钢加固方法。
On the one hand , with the increasing traffic and the advancing grade of the load , the reliability of the old bridges should be pay attention to . on the other hand , the new bridges " reliability should be analyzed before they operate , in order to ensure enough safety , applicability and wear 一方面,随着交通量的增大和荷载等级的提高,已建旧桥的可靠性问题值得关注;另一方面,新建桥梁在投入使用之前也要进行可靠性分析,以保证其有足够的安全性、适用性和耐久性。