Concrete and reinforcement bar corrosion reduced the reinforced concretes durability.

砼碳化及钢筋锈蚀导致钢筋砼构件耐久性能降低.

The utility model relates to a concrete anti-crack fiber reinforcement bar.

一种混凝土抗裂纤维加强筋。

Correctly arranging a concrete base transverse adjusting component and connecting the component with a switch tie truss reinforcement bar;

混凝土底座横向调整件安放正确，并与岔枕桁架钢筋连接；

All the reinforcement bar stresses measured in lined top-arch represent some time-effect, i. e. these stresses increase steadily and slowly with the time elapsed.

且顶拱钢筋应力随时间推移呈现与岩石流变曲线相似之持续而缓慢的增长，反映出顶拱在实际工作状态下具有时效特点。