The relationship between moment and curvature and the elastic-plastic seismic response analysis of high pier section

Abstract

Nonlinear hysteresis characteristics are usually used 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 timesaving method to evaluate the seismic behavior of the section. The thesis made a research of the effect of section bending moment and curvature first. Then chose five different sections and observed their effects on bending moment and curvature. The results indicated that, with the increasing of section size, the crack, the yield, the moment damage and the curvature of the section are increased. The increasing of section size is that the increasing of moment of inertia, so with the increasing of the moment of inertia, the resistance to crack, field and damage of the bridge pier is stronger. On the basis of this, the elastic-plastic time history analysis of Wu Guan super highway Gan Gou Zi Bridge is made. It showed 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.