本文采用断裂力学方法来估算结构构件的疲劳寿命，这其中主要围绕裂纹扩展速率表达式展开研究。
Fracture mechanics is adopted to estimate the fatigue life of structural members, and among the rest, crack growth rate formula is studied.
在现代设计理论中除研究结构构件和体系的力学行为外，另一个重要的方面就是节点的力学性能。
Besides researching for the mechanics of structure system, it is important for us to pay attention to the study of the mechanical behavior of connections.
针对聚丙烯纤维混凝土的力学性能和钢筋聚丙烯纤维混凝土受弯构件的结构性能，本文进行了如下试验研究。
Mechanical properties of polypropylene fibers reinforced concrete and the properties of reinforced concrete flexural members are studied by means of several experiments.
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