Nonlinear hysteresis characteristics are usually utilized in the elastic-plastic seismic analysis of the structure of
bridge. These characteristics may be described by the relationship of section bending moment and curvature. This
relationship can be obtained by the section size and reinforcement, which is also a simple and time-saving method to
evaluate the seismic behavior of the section. The research is conducted on the effect of section bending moment and
curvature. Then, five different sections are chosen to observe their effects on bending moment and curvature. The results
indicate that with the increase in section size, the crack, the yield, the moment damage and the curvature of the section
also increase. The increase in section size refers to the increase in moment of inertia, so with the increase in the moment
of inertia, the resistance to crack, field and damage of the bridge pier become stronger. On this basis, the elastic-plastic
time history analysis of Wu Guan super highway Gan Gou Zi Bridge is carried out. It shows that the capacity of energy
dissipation by hysteretic of the Rectangular thin-wall pier is better than the twin shaft pier. So it is best to use rectangular
thin-wall pier in the same condition.
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