Three concepts,such as the dead,live load ratio between cable and girder,and the nominal rigidity of the bridge,are provided,and the bridge is defined according to its structural type in order to reveal its mechanical essence.

In order to clarify the relations between New Yuefu and Yue Baishi , it is necessary to define its name first.

The research progeny about corrosion character and deterioration mechanism of mechanical property of the corroded steel bars in concrete are mainly summarized and discussed in this article,which also expounds the deteriorating regularity of nominal strength and ductility of the corroded steel bars .

Through the dynamics analysis on the relationship between wheel and rail surface,based on the experimental data from scientific research institutes,we find the effective measure to avoid suspension derailment of empty trains that is to reduce the gap between rail and wheel in straight section(nominal common difference).

Study of fatigue strength assessment methods of welded structures based on nominal stress;

The fatigue strength of duplex stainless steel welded jointing with longitudinal fillet welded gusset and with longitudinal flat side gusset welded on plate were evaluated by hot spot stress,and the hot spot stress S-N curves were obtained and compared with the nominal stress S-N curves.