Abstract：
Through the four-point bending fatigue test, the fatigue stiffness degradation attenuation characteristics of the subway reinforced concrete beams and the relationship between fatigue load and stress level were simulatively studied. Corrosion fatigue equations of Ｓ－Ｎ under the coupled environment of stray current and chlorine salt environment have also been presented in the experiments. The research showed that in the same load level, fatigue stiffness attenuation processes of corrosion fatigue specimens and the contrast specimens present the typical three stage characteristics. Compare to the contrast specimens, corrosion fatigue specimens show the typical corrosion fatigue feature. Through comparison and analysis under different load levels, fatigue stiffness attenuation process of corrosion fatigue specimens show three stage characteristics on the whole, the decay rate will increases as load level increases, and the attenuation process may degenerate into two stages when the load level become bigger.
CHEN Meng-cheng,QIN Zhen,WANG Kai et al. EXPERIMENTAL RESEARCH ON STIFFNESS DETERIORATION LAWS OF SUBWAY REINFORCED CONCRETE BEAM[J]. Architecture Technology, 2013, 44(4): 358-.
